Tall Oil (Crude)

Tall oil is an oxidizing oil and through reaction with oxygen of the atmosphere it dries and hardens (drying oil). Oxidation occurs in three phases: liquid, gum and solid. Tank cleaning should be therefore executed as soon as possible after discharge.

  1. Butter worth the tank 1 hour with hot seawater (60-70° C.)
  2. Butter worth the tank 1 hour with hot seawater (75° C.). Check if the tank is free of sediments before recirculation cleaning will be started.
  3. Flush the tank 10 minutes with fresh water to remove the residues of seawater.
  4. Prepare on of the following cleaning solution with fresh water:
    • 0.4% RXSOL CTC -VOLC
    • 0.4% RXSOL CTC-VOLC
    • 2.5% Sodium or Potassium Hydroxide
    • 5% RXSOL AL 2005
  5. Butter worth the tank 1, 5 hour by recirculation.
  6. The cleaning temperature should be approx 600 C (not higher).
  7. Butter worth the tank 1 hour with hot seawater (70-80° C.)
  8. Rinse the tank with fresh water
  9. Ventilate, mop and dry the tank. Inspect the tank: Depending on the Fatty Acid and Resin Acid content of the Crude Tall Oil it might be possible that some minor spots of sticky brownish residues are present.
  10. To remove these residues Butter worth the tank with one of the following solution:
    • 3-5% phosphoric acid and 0.4% RXSOL CTC-VOLC; or
    • 3-5% nitric acid and 0.4% RXSOL CTC VOLC; or
    • 2-5% of a metallic brightener (RXSOL MB 1011) and 0, 4% RXSOL CTC-VOLC The cleaning temperature should be moderate (50°C.) Use heating coils not the Butter worth heater.
  11. Butter worth the tank 0, 5 hours with fresh water
  12. Ventilate, mop and dry the tank. Tall oil is an oxidizing oil and through reaction with oxygen of the atmosphere it dries and hardens (drying oil). Oxidation occurs in three phases: liquid, gum and solid. Tank cleaning should be therefore executed as soon as possible after discharge.
  13. Butter worth the tank 1 hour with seawater (60-70° C.)
  14. Butter worth the tank 1 hour with hot seawater (75° C.). Check if the tank is free of sediments before recirculation cleaning will be started.
  15. Flush the tank 10 minutes with fresh water to remove the residues of seawater.
  16. Prepare one of the following cleaning solutions with fresh water.
    • 0, 4% RXSOL CTC-VOLC or alternatively
    • 0, 4% RXSOL CTC-VOLC
    • 2, 5% Sodium or Potassium Hydroxide
    • 5% RXSOL AL 2005 Butter worth the tank 2, 0 hour by recirculation. The cleaning temperature should be approx 600 C (not higher).
  17. Butter worth the tank 1 hour with hot seawater (70-80° C.)
  18. Rinse the tank with fresh water
  19. Ventilate, mop and dry the tank continued Inspect the tank: Depending on the Fatty Acid and Resin Acid content of the Crude Tall Oil it might be possible that some minor spots of sticky brownish residues are present.
  20. To remove these residues Butter worth the tank with one of the following solution:
    • 3-5% phosphoric acid and 0.4% RXSOL CTC -VOLC; or
    • 3-5% nitric acid and 0.4% CTC-Cleaner-VLC; or
    • 2-5% of a metallic brightener (RXSOL MB 1011) and 0, 4% RXSOL CTC-VOLC The cleaning temperature should be moderate (50°C.) Use heating coils not the Butter worth heater.
  21. Butter worth the tank 0, 5 hours with fresh water
  22. Ventilate, mop and dry the tank

Fatty Acid Oils/Fats

Fatty acid oils/fats will react with seawater as well as with untreated fresh water and will format magnesium and calcium soaps (white residues). If possible seawater or untreated freshwater (high water hardness) should not be used for pre-cleaning.

  1. Butter worth the tanks 1-1,5 hour with a treated freshwater, which should be prepared in a separate tank. The cleaning temperature should be approx. 20-250C above the melting point of the product.
    • For BETTER RESULT CONTACT RX MARINE INTERNATIONAL. If the use of seawater cannot be avoided Butter worth the tank for 1-1, 5 hour with seawater of a temperature of 10 -150 C above the melting point of the product. After a sufficient pre-cleaning the temperature can be increased to 20-250 C above the melting point of the product.
  2. If seawater was used in STEP 1: Flush the tank 10 minutes with fresh water to remove the residues of seawater.
  3. Prepare the following cleaning solution in fresh water:
    • 0.4% RXSOL CTC-VOLC
    • 5% RXSOL AL 2005 Butter worth the tank 1.5 hours with the prepared solution by recirculation. The temperature should be approx. 70-80°C.
  4. Butter worth the tank for 1 hour with hot seawater (60-800 C)
  5. Flush the tank with fresh water Inspect the tank: If white residues are present Butter worth the tank with on of the following solution:
    • 3-5% phosphoric acid and 0.4% RXSOL CTC-VOLC ; or
    • 3-5% nitric acid and 0.4% RXSOL CTC-VOLC ; or
    • 2-5% of a metallic brightener RXSOL MB 1011 and 0, 4% RXSOL CTC-VOLC The cleaning temperature should be moderate (50°C.) Use heating coils not the Butter worth heater.
  6. Butter worth the tank 0, 5 hours with fresh water
  7. Ventilate, mop and dry the tank

Fish Oil

Fish oil should never be washed hot (varnish formation) Fish oil is an oxidizing oil and through reaction with oxygen in the atmosphere it dries and hardens. Tank cleaning should be executed as soon as possible after discharge. Avoid higher temperatures (e.g. steaming) and heated cargoes in adjacent tanks.

  1. Butter worth the tank 2 hours with cold/ambient (max. 30°C.) seawater and pump the waste water without any delay continuously out. Check if the tank is free of sediments before starting to clean as per step 2 and 3.
  2. Flush the tank and line system shortly with fresh water to remove the seawater residues
  3. Prepare the following cleaning solution in fresh water.
    • 0, 4% RXSOL CTC-VOLC or alternatively
    • 0, 4% RXSOL CTC-VOLC
    • 2, 5% Sodium or Potassium Hydroxide
    • 5% P3 RXSOL AL 2005 Butter worth the tank 2, 0 hour by recirculation. If Caustic is used the cleaning temperature should be not higher than 600 C.
  4. Butter worth the tank 1 hour with hot seawater (70- 80°C).
  5. Flush the tank with fresh water.
  6. Ventilate, mop and dry the tank

Latex – Natural & Synthetic

Latex polymerase if getting dry Latex polymerase at temperatures above 30°C. Always avoid warm temperatures and warm cargoes in adjacent tanks. Load the tank to 100% to avoid dried residues at tank top. To keep the tank humid during discharge introduce slightly steam into the tank but avoid any heat up. Wash the tank down directly after discharge and avoid any delay.

  1. Butter worth the tank after discharge without any delay for 2 hours with cold fresh water and inject from the beginning on the RXSOL CTC-VOLC (see cleaning method 3). Calculate for approximately 10 m3 cleaning water 1 pail of the RXSOL CTC-VOLC (20 kg) If it is not possible to discharge the slop directly ashore leave the waste water inside the tank until discharge at sea is possible. Keep the tank closed to maintain the humidity.
  2. Pump the waste water overboard and continue to Butter worth 1.5 hours with cold seawater and inject simultaneously the RXSOL CTC VOLC.
  3. Flush the tank 30 minutes with fresh water
  4. Ventilate, mop and dry the tank. Some minor dried latex residues which could be present on heating coils and pump body have to be removed manually. Recommended preparations before loading and discharge of Latex: Prepare the loading/discharge connection directly at the pump stack of the respective tank and flange off the line to the manifold. Install a valve at this connection and use hoses for the shore connection (necessary length should be as short as possible). Close the drop line inside the tank by a flange or alternatively with a wooden plug.If a plug has to be used cover this with plastic foil (at least 3 layers) and fix it with a stainless steel band. For loading and discharge use the deep well pump only. All other connections and openings inside the tank should be dismantled, flanged off or protected as described above (e.g. steam, nitrogen, vapour line connections etc.).Fixed tank cleaning machines should be dismantled and blinder flanged. Tank dome hatches and Butter worth hatches including gaskets should be protected with a plastic foil which has to be placed between the dome and the hatch. Before loading steam the tank with very low pressure (1 bar) to make sure that the bulkheads, tank top, bottom and the lines inside the tank are humid but avoid any heat up. All equipment that might come into contact with the Latex should be washed with fresh water so they are humid before the loading takes place. Load the tanks 100% and into the tank domes to prevent that the Latex comes into contact with air during the voyage.During loading the vessel must be therefore trimmed and kept on even keel to prevent air pockets in the tank. Before discharge remove the plugs of the vapour connection and steam connection and flush all equipment that might come into contact with Latex with fresh water During discharge keep the tank closed to keep the humidity.

Lube Additives 1

  • Wide range of different types of additives for Luboil and Gas oil.
  • Light products with low viscosity until dark products with very high viscosity.
  • Soluble in light Base oil and Gas oil
  • Some Lube Additives react with hot water producing gluey/sticky residues
  1. –Pre-Cleaning The pre-cleaning should be carried out with hot base oil or gas oil. Fill 3-5 m3 gas oil or light base oil into the tank and Butter worth the tank sufficiently by recirculation. If base oil is used the cleaning temperature should be above 60° C. If gas oil is used the temperature should not exceed 50° C (flash point).
  2. Butter worth the tank 2 hours with hot seawater or freshwater (70-80°C).
  3. Prepare the following cleaning solution in freshwater or seawater: 0,4 % RXSOL CTC-VOLC Butter worth the tank 1, 5 to 2, 0 hours by recirculation. The temperature should be approx. 70°C.The temperature can be achieved/maintained by means of heating coils, or going via the Butter worth heater. Depending on the amount of cargo residues the solution can be used for 1 to 3 tanks.
  4. Rinse the tank with fresh water.
  5. Ventilate, mop and dry the tank.

Lube Additives 2

For some Lube Additives a pre-cleaning with base oil or gas oil is not necessary

  1. – (PRE-CLEANING) Pre-wash the tank with freshwater of a warm to moderate temperature.
  2. Butterworth the tank 1 hour with seawater or freshwater of a moderate temperature.
  3. Butterworth the tank 1 hour with hot seawater or freshwater (70-80°C).
  4. Prepare the following cleaning solution in freshwater or seawater: 0,4 % RXSOL CTC-VOLC Butter worth the tank 1, 5 hours by recirculation with a temperature of approx. 700 C.The necessary temperature can be achieved/maintained by means of heating coils, or going via the Butterworth heater. Depending on the amount of cargo residues the solution can be used for 1 to 3 tanks.
  5. Rinse the tank with fresh water.
  6. Ventilate, mop and dry the tank. Further Cleaning Suggestions:
    • For some Lube Additives a pre-cleaning with base oil or gas oil is not necessary. After butter Worthing with warm/ moderate water followed by hot water the residues can be removed by recirculation of a solution of 0, 4 % RXSOL CTC-VOLC or by injection of the RXSOL CTC-VOLC into the Butter worth system during the hot wash… The suitability of the RXSOL CTC-VOLC solution for the Lube Additive in question can be easily pre-tested in a glass bottle.
    • Some Lub Additives with higher viscosity can be removed by recirculation of a solution of 0.4% RXSOL CTC-VOLC and 5% RXSOL AL 2005.
    • Residues of Lube Additives can be sprayed and manually removed with undiluted RXSOL AL 2005.
    • Residues of Lube Additives can be as well sprayed and manually removed by a gas oil.

Luboils

  1. Wide range of different products from very light and thin transformer or spindle oils to heavy and dark cylinder or gear oils.
  2. Different carriage temperatures and heating requirements depending on the viscosity.
  3. The viscosity will decrease with increasing temperature.
  4. High/No flash point
  5. Butter worth the tanks 1-1, 5 hours with hot seawater or freshwater (70-800C).
  6. Prepare the following cleaning solution in freshwater or seawater: 0,4 % RXSOL CTC VOLC Butter worth the tank 1,5 hours by recirculation with a temperature of approx 700 C. The necessary temperature can be achieved/maintained by means of heating coils, or going via the Butter worth heater. Depending on the amount of cargo residues the solution can be used for 1 to 3 tanks.
    • Butter worth the tank for 0, 5 hours with hot fresh water.
    • Ventilate, mop and dry the tank.
    • Instead of recirculation cleaning the RXSOL CTC-VOLC can be as well injected into the Butter worth system (see cleaning method 3). The use of the RXSOL CTC-VOLC is not recommended for cleaning of Fuel oils / Bunker oils These products have to be pre-cleaned with water of a warm to moderate temperature followed by a recirculation cleaning with gas oil. To reduce the amount of slops the following cleaning procedure is recommended: STEP 1 Pre-cleaning (see drawing method 4, next page)
    • Depending on the tank size and height fill the necessary amount of freshwater or seawater into the service tank.
    • Butter worth all tanks to be cleaned 1-1,5 hour using the water from the service tank
    • Heat the water by means of heating coils, cargo heat exchanger or going via the Butter worth heater
    • The pre-cleaning temperature should be between 70 and 800 C
    • Pump the waste water from the tanks to be cleaned back to service tank (over top).
  7. Solution-cleaning (see drawing method 4, next page)
    • Depending of tank size and height fill the necessary amount of freshwater or seawater into the service tank.
    • Add for each 10 m3 of water one pail RXSOL CTC-VOLC (0, 2%)
    • Butter worth all tanks to be cleaned 1-1, 5 hour using the solution from the service tank.
    • Heat the Solution by means of heating coils, cargo heat exchanger or going via the Butter worth heater.
    • The cleaning temperature should be approx 700 C
    • Pump the used solution from the tanks to be cleaned back to service tank (over top).

Gasoil, Kerosine, Gasoline.

  1. Butterworth the tanks 1 hours with seawater or freshwater of cold to moderatetemperature (flashpoint).
    • Gas oil approx. 50/550 C
    • Kerosene approx. 30/400 C
    • Gasoline cold
  2. Butterworth the tanks 1 hour with hot seawater or freshwater (600 C)
  3. Prepare the following cleaning solution in freshwater or seawater:0.4 % RXSOL CTC-VOLC Butterworth the tank 1 hour by recirculation with a temperature of approx 600 C. The necessary temperature can be achieved/maintained by means of heating coils, or going via the Butterworth heater. Depending on the amount of cargo residues the solution can be used for 1 to 3 tanks.
  4. Butterworth the tank for 0.5 hours with hot fresh water.
  5. Ventilate, mop and dry the tank.
    • Instead of recirculation cleaning the RXSOL CTC-VOLC can be as well injected into the Butterworth system (see cleaning method 3).

Phthatalates (DOP, DINP, DIDP)

  1. Butterworth the tank 1, 5 to 2 hours with ambient temperature (max 300C).
  2. Prepare the following cleaning solution in freshwater 0.4 % RXSOL CTC-VOLC Butterworth the tank 1 hour by recirculation with a temperature of 500 C. The necessary temperature can be achieved/maintained by means of heating coils, or going via the Butterworth heater. Depending on the amount of cargo residues the solution can be used for 1 to 3 tanks.
  3. Rinse the tank with fresh water
  4. Ventilate, mop and dry the tank
    • Instead of recirculation cleaning the RXSOL CTC-VOLC can be as well injected into the Butterworth system (see cleaning method 3).

Phenol

Direct after discharge flush lines and tanks thoroughly with hot fresh water or demi water and recirculate. This is done to bring the freezing point down prior to the prescribed tank cleaning procedure. Demi water will be used if the pre-wash quantity can be pumped ashore.

  1. Butterworth the tanks 1, 5-2 hours with hot seawater or freshwater (800C).STEP 2 Prepare the following cleaning solution in freshwater:0.4 % RXSOL CTC-VOLC Butterworth the tank 1 hour by recirculation with a temperature of approx 700 C. The necessary temperature can be achieved/maintained by means of heating coils, or going via the Butterworth heater. The solution can be used for 1 to 4 tanks.
  2. Butterworth the tank for 0, 5 hours with hot fresh water.
  3. Ventilate, mop and dry the tank.
    • Instead of recirculation cleaning the RXSOLCTC-VOLC can be as well injected into the Butterworth system (see cleaning method 3).

Slack Wax

(Paraffin with a high oil content and a high melting point)

  1. Steam the tank for approx. 1-1, 5 hour.The temperature should be at least 20°C above the melting point of the slack wax.
  2. Butterworth the tank 1-1, 5 hour directly after steaming with hot seawater or hot fresh water.Let the water flow on deck until the required temperature has been reached. The temperature during the cleaning should be 20°C. above the melting point of the wax. The cleaning time should be sufficiently long to reach the melting point of the wax.
  3. Due not interrupt the cleaning process and continue to Butterworth the tank with hotseawater or freshwater for another hour and inject the RXSOL CTC-VOLC (see method 3).Therefore mix the RXSOL CTC-VOLC into a drum with water (1 to 2 pails/100 litres water) and inject the mixture simultaneously into the Butterworth line during cleaning. The necessary amount to be injected depends on the consumption and number of Butterworth machines.Calculate for 10-15 m3 of wash water 1 pail RXSOL CTC-VOLC
  4. Flush the tank with fresh water
  5. Ventilate, mop and dry the tank.

Note: during cleaning there should be no ballast water adjacent to the tank

Palm Fatty Acid

  1. Butterworth the tank for 1 hour with hot seawater (60-800 C)
  2. Flush the tank with fresh water
  3. Inspect the tank: If white residues are present Butterworth the tank with one of the following solution:
    • 3-5% phosphoric acid and 0.4% RXSOL CTC-VOLC; or
    • 3-5% nitric acid and 0.4% RXSOL CTC-VOLC ; or
    • 2-5% of a metalic brightener ( RXSOL MB 1011) and 0, 4% RXSOL CTC-VOLC The cleaning temperature should be moderate (50°C.) Use heating coils not the Butterworth heater.
  4. Butterworth the tank 0, 5 hours with fresh water
  5. Ventilate, mop and dry the tank

Slurry (Not Clay Slurry

Through reaction with CO2 in the atmosphere the Slurry dries and hardens. Tank cleaning should be executed as soon as possible after discharge. Avoid heated cargoes in adjacent tanks. During cleaning pump the wastewater direct overboard and not into a slop tank. Do not mix different grades of Slurry (reaction between an-ionic and kat-ionic products).

  1. Butterworth the tank direct after discharge with cold fresh water for about 30 minutes.
  2. Butterworth the tank 2 hours with 40° C. warm seawater.
  3. Hand hoses the tank with seawater until the tank is free of slurry residues. (only a white film of slurry is left)
  4. For cleaning the cargo lines fill 15 m3 of seawater into the tank and pump this water with maximum pressure out to both sides of the manifold and dead ends.
  5. Drain and strip the tank and remove the sea water residues by fresh water flush.
  6. Prepare the following cleaning solution in fresh water:
    • 0.4% RXSOL CTC-VOLC Example: 5 m3 fresh water
    • 10% Nitric Acid 1 pail RXSOL CTC-VOLC 500 litre Nitric Acid (63%)Butterworth the tank for 2 hours by recirculation with the prepared solution (T. = ambient). Transfer the solution to the next tank.The above solution is suitable for approx. 4 to 5 tanks.
  7. Flush the tank 30 minutes with fresh water
  8. Ventilate, mop and dry the tank

Styrene Monomer

During loading, transport, discharge and tank cleaning avoid any heat and heated cargoes in adjacent tanks (risk of polymerisation). Use a new solution of RXSOL CTC-VOLC only for removal of the smell (final touch).

  1. Butterworth the tank 1, 5 hours with cold sea water or freshwater
  2. Prepare the following solution in the tank to be cleaned: 5 m3 fresh water, with a temperature of 30°C. 1 pail of CTC-Cleaner-VLC (0, 4%)Butterworth the tank one hour by recirculation (T: 300 C).
  3. Rinse the tank 15 minutes with fresh water
  4. Ventilate, Mop and Dry the tank. Instead of recirculation cleaning as per
  5. the RXSOL CTC-VOLC can be also injected into the Butterworth system:
  6. AButterworth the tank 1, 5 hours with cold seawater or freshwater.STEP 1 BButterworth the tank 1 hour with seawater or freshwater of a moderate temperature (approx 500C) and inject the RXSOL CTC-VOLC (see method 3).
  7. B should be carried out only for the removal of smell (No residues of Styrene present)

Vegetable and Animal Oils

(see attached list) For effective cleaning of animal and vegetable oils the first cleaning step is of utmost importance. Vegetable oils are divided in:

  • Non-drying products
  • Semi-drying products
  • Drying products
  • Fatty acids Non Drying Products
  1. Butterworth the tank with seawater or freshwater with a temperature 20°C. above the melting point of the product to be cleaned. After sufficient pre-cleaning of at least 1.5 hours the temperature can be increased. Drying and Semi-drying ProductsThese are oxidising products and through reaction with oxygen they will dry and harden. Tank cleaning should be executed as soon as possible after discharge. High temperatures (e.g. cleaning or steaming) and heated cargoes in adjacent tanks should be avoided.
  2. Butterworth the tank with cold to warm seawater or freshwater.If the product has a higher melting point Butterworth the tank with seawater or freshwater with a temperature maximum 10°C above the melting point of the product.After sufficient pre-cleaning of at least 1.5 – 2 hours the temperature can be increased. Fatty Acids or vegetable/animal oils with high free fatty acid contentsee the cleaning suggestion of Fatty Acids.
  3. If seawater was used in step 1 it is of utmost importance to flush/rinse the tank with freshwater before cleaning as per step 3 is continued.
  4. (Final cleaning)Prepare the following solution (A) in freshwater (see table):Solution A(emulsification) 0. 4 % RXSOL CTC-VOLC Butterworth the tank with the prepared solution for 1, 5-2, 0 hours by recirculation. The necessary temperature can be achieved / maintained by means of heating coils, cargo heat exchanger or Butterworth heater. Depending on the amount of product residues the solution can be used for 1 to 4 tanks.On some vegetable/animal oils it is recommended to saponify additionally the product residues (see table): Therefore prepare one of the following solutions (B or C) in freshwater (see table): Solution B 0.4 % RXSOL CTC-VOLC plus 2.5% Potassium Hydroxide (KOH) or Sodium Hydroxide (NaOH) Solution C 0.4 % RXSOL CTC-VOLC plus 2 – 5% RXSOL AL 2005
  5. continuedButterworth the tank with the prepared solution for 1, 5-2, 0 hours by recirculation. The necessary temperature can be achieved/maintained by means of heating coil (service tank) cargo heat exchanger or Butterworth heater.If RXSOL CTC-VOLC is used the cleaning temperature should be 60-700 CIf Sodium or Potassium Hydroxide is used the cleaning temperature should be 600C.If RXSOL AL 2005 Marine is used the cleaning temperature can be 70-800 C. Depending on the amount of product residues the solution can be used for 1 to 3 tanks.
  6. Butterworth the tank 1 hour with hot seawater
  7. Rinse the tank with fresh water
  8. Inspect the tank; if white residues or a white film is present (calcium/magnesium soaps or carbonate) Butterworth the tank with one the following solution: 3-5% phosphoric acid and 0.4% RXSOL CTC-VOLC (stainless steel only); or 3-5% nitric acid and 0.4% RXSOL CTC-VOLC (stainless steel only); or 5-10% citric acid and 0,4% RXSOL CTC-VOLC (also suitable for Epoxy Coatings) or 2% P3 T1166 Marine and 0,4% RXSOL CTC-VOLC (also suitable for Epoxy Coatings) The cleaning temperature should be moderate (50°C.) Use heating coils not the Butterworth heater.
  9. Flush the tank with fresh water
  10. Ventilate, mop and dry the cargo tank.

Note: for vegetable oils which can be cleaned only by the RXSOL CTC-VOLC (Solution A) the final cleaning can be carried out by recirculation or by injection (see method 3).