GB830962A - A new or improved method of and equipment for cleansing surfaces of oily deposits - Google Patents
A new or improved method of and equipment for cleansing surfaces of oily depositsInfo
- Publication number
- GB830962A GB830962A GB3621754A GB3621754A GB830962A GB 830962 A GB830962 A GB 830962A GB 3621754 A GB3621754 A GB 3621754A GB 3621754 A GB3621754 A GB 3621754A GB 830962 A GB830962 A GB 830962A
- Authority
- GB
- United Kingdom
- Prior art keywords
- liquid
- cleansing
- acid
- sodium
- cleansing liquid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000000034 method Methods 0.000 title abstract 2
- 239000007788 liquid Substances 0.000 abstract 19
- 239000002253 acid Substances 0.000 abstract 8
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 abstract 6
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 abstract 4
- 239000003599 detergent Substances 0.000 abstract 4
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 abstract 4
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 abstract 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 abstract 3
- 238000004140 cleaning Methods 0.000 abstract 3
- 150000001875 compounds Chemical class 0.000 abstract 3
- 239000000203 mixture Substances 0.000 abstract 3
- 239000011780 sodium chloride Substances 0.000 abstract 3
- -1 alkyl sulphate Chemical group 0.000 abstract 2
- BDAGIHXWWSANSR-UHFFFAOYSA-N formic acid Substances OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 abstract 2
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 abstract 2
- 239000007793 ph indicator Substances 0.000 abstract 2
- 239000004317 sodium nitrate Substances 0.000 abstract 2
- 235000010344 sodium nitrate Nutrition 0.000 abstract 2
- 235000010288 sodium nitrite Nutrition 0.000 abstract 2
- 239000001488 sodium phosphate Substances 0.000 abstract 2
- 235000011008 sodium phosphates Nutrition 0.000 abstract 2
- 229910052938 sodium sulfate Inorganic materials 0.000 abstract 2
- 235000011152 sodium sulphate Nutrition 0.000 abstract 2
- 229910021653 sulphate ion Inorganic materials 0.000 abstract 2
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical class [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 2
- 239000000080 wetting agent Substances 0.000 abstract 2
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 abstract 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 abstract 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 abstract 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 abstract 1
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 abstract 1
- 150000003868 ammonium compounds Chemical class 0.000 abstract 1
- 125000000129 anionic group Chemical group 0.000 abstract 1
- 125000002091 cationic group Chemical group 0.000 abstract 1
- 239000002828 fuel tank Substances 0.000 abstract 1
- 230000005484 gravity Effects 0.000 abstract 1
- 239000004310 lactic acid Substances 0.000 abstract 1
- 235000014655 lactic acid Nutrition 0.000 abstract 1
- 238000012423 maintenance Methods 0.000 abstract 1
- 229910052751 metal Inorganic materials 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 150000007522 mineralic acids Chemical class 0.000 abstract 1
- 229910017604 nitric acid Inorganic materials 0.000 abstract 1
- 150000007524 organic acids Chemical class 0.000 abstract 1
- 229910052700 potassium Inorganic materials 0.000 abstract 1
- 239000011591 potassium Substances 0.000 abstract 1
- 238000000926 separation method Methods 0.000 abstract 1
- 235000002639 sodium chloride Nutrition 0.000 abstract 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/08—Cleaning containers, e.g. tanks
- B08B9/093—Cleaning containers, e.g. tanks by the force of jets or sprays
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Detergent Compositions (AREA)
Abstract
A liquid for cleaning the internal surfaces of fuel tanks, in particular a cleansing liquid comprising a 0.5% by weight solution of a long chain secondary alkyl sulphate and 10% by weight of sodium chloride, is maintained at a pH lower than 7. The detergent compound may, however, be any detergent stable in acid solutions, and may be anionic, cationic or non-ionic. The liquid may also include acid sodium phosphates, sodium sulphate, sodium nitrate and sodium nitrite. Equivalent potassium or ammonium compounds may also be used. If the liquid is not sufficiently acid, an organic acid, e.g. formic, acetic or lactic acid, or an inorganic acid, e.g. hydrochloric, sulphuric or nitric acid, is added. Specifications 696,631, 742,844, 808,901 and 808,902 are referred to.ALSO:A mixture of cleansing or detergent liquid and removed oily deposits to be separated by gravity is caused to separate more rapidly by maintaining the cleansing liquid, at least during the separating stage, at a pH lower than 7. The cleansing operation may be performed by the apparatus described in Specification 696,361, such apparatus including a pH reducing tank for containing cleansing liquid with extra acid, and means for introducing the latter into the system as and where desired to maintain the pH at the required level, for example, by pH indicators at various points associated with regulators coupled to the pH reducing tank. The cleansing liquid may contain a buffer to automatically maintain the pH of this liquid at the required level. The gravitational separating means may be as described in Specifications 808,902 and 808,901. Specification 742,844 also is referred to.ALSO:A method of cleaning the interior surfaces of metal tanks comprises the use of one or more nozzles to project a cleansing liquid against said surfaces, the removal of the resulting liquid mixture to a separating means, the recirculation of the separated cleansing liquid to said nozzle or nozzles, and the maintenance of the cleansing liquid, at least during the separation stage, at a pH lower than 7. The cleaning operation may be performed by the apparatus described in Specification 696,361, such apparatus including a pH reducing tank for containing cleansing liquid with extra acid, and means for introducing the latter into the system as and where desired to maintain the pH at the required level, for example, by pH indicators at various points associated with regulators coupled to the pH reducing tank. The cleansing liquid may contain a buffer to maintain the pH of this liquid at the required level. Cleansing liquid. This may be a solution in water of a detergent compound or a mixture comprising a wetting agent stable in acid solutions and one or more water soluble additional compounds also stable in acid solution, for example, acid sodium phosphates, sodium sulphate, sodium nitrate, sodium chloride or sodium nitrite. In one example the cleansing liquid comprises 0.5% by weight of a wetting agent comprising a long chain secondary alkyl sulphate and 10% by weight of sodium chloride. After cleansing, the tank is washed down with a passivating solution. The cleansing liquid may also be projected against the tank walls by the equipment described in Specifications 742,844, 808,901 or 808,902.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3621754A GB830962A (en) | 1954-12-14 | 1954-12-14 | A new or improved method of and equipment for cleansing surfaces of oily deposits |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3621754A GB830962A (en) | 1954-12-14 | 1954-12-14 | A new or improved method of and equipment for cleansing surfaces of oily deposits |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB830962A true GB830962A (en) | 1960-03-23 |
Family
ID=10386063
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3621754A Expired GB830962A (en) | 1954-12-14 | 1954-12-14 | A new or improved method of and equipment for cleansing surfaces of oily deposits |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB830962A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3436263A (en) * | 1965-05-13 | 1969-04-01 | Perolin Co Inc | Method of cleaning large storage tanks for petroleum products |
-
1954
- 1954-12-14 GB GB3621754A patent/GB830962A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3436263A (en) * | 1965-05-13 | 1969-04-01 | Perolin Co Inc | Method of cleaning large storage tanks for petroleum products |
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