GB640148A - Aliphatic sulphur compounds and compositions containing same - Google Patents
Aliphatic sulphur compounds and compositions containing sameInfo
- Publication number
- GB640148A GB640148A GB31389/46A GB3138946A GB640148A GB 640148 A GB640148 A GB 640148A GB 31389/46 A GB31389/46 A GB 31389/46A GB 3138946 A GB3138946 A GB 3138946A GB 640148 A GB640148 A GB 640148A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sulphur
- aliphatic
- sulphide
- selenium
- oil
- 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
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M1/00—Liquid compositions essentially based on mineral lubricating oils or fatty oils; Their use as lubricants
- C10M1/08—Liquid compositions essentially based on mineral lubricating oils or fatty oils; Their use as lubricants with additives
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/02—Hydroxy compounds
- C10M2207/023—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings
- C10M2207/027—Neutral salts thereof
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/10—Carboxylix acids; Neutral salts thereof
- C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
- C10M2207/121—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of seven or less carbon atoms
- C10M2207/123—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of seven or less carbon atoms polycarboxylic
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/10—Carboxylix acids; Neutral salts thereof
- C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
- C10M2207/125—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/10—Carboxylix acids; Neutral salts thereof
- C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
- C10M2207/129—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of thirty or more carbon atoms
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/10—Carboxylix acids; Neutral salts thereof
- C10M2207/14—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to carbon atoms of six-membered aromatic rings
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/10—Carboxylix acids; Neutral salts thereof
- C10M2207/14—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to carbon atoms of six-membered aromatic rings
- C10M2207/142—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to carbon atoms of six-membered aromatic rings polycarboxylic
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/10—Carboxylix acids; Neutral salts thereof
- C10M2207/16—Naphthenic acids
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/10—Carboxylix acids; Neutral salts thereof
- C10M2207/22—Acids obtained from polymerised unsaturated acids
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/28—Esters
- C10M2207/287—Partial esters
- C10M2207/288—Partial esters containing free carboxyl groups
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/40—Fatty vegetable or animal oils
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/40—Fatty vegetable or animal oils
- C10M2207/404—Fatty vegetable or animal oils obtained from genetically modified species
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
- C10M2219/02—Sulfur-containing compounds obtained by sulfurisation with sulfur or sulfur-containing compounds
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
- C10M2219/04—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions containing sulfur-to-oxygen bonds, i.e. sulfones, sulfoxides
- C10M2219/044—Sulfonic acids, Derivatives thereof, e.g. neutral salts
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
- C10M2219/08—Thiols; Sulfides; Polysulfides; Mercaptals
- C10M2219/082—Thiols; Sulfides; Polysulfides; Mercaptals containing sulfur atoms bound to acyclic or cycloaliphatic carbon atoms
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
- C10M2219/08—Thiols; Sulfides; Polysulfides; Mercaptals
- C10M2219/082—Thiols; Sulfides; Polysulfides; Mercaptals containing sulfur atoms bound to acyclic or cycloaliphatic carbon atoms
- C10M2219/087—Thiols; Sulfides; Polysulfides; Mercaptals containing sulfur atoms bound to acyclic or cycloaliphatic carbon atoms containing hydroxy groups; Derivatives thereof, e.g. sulfurised phenols
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
- C10M2219/08—Thiols; Sulfides; Polysulfides; Mercaptals
- C10M2219/082—Thiols; Sulfides; Polysulfides; Mercaptals containing sulfur atoms bound to acyclic or cycloaliphatic carbon atoms
- C10M2219/087—Thiols; Sulfides; Polysulfides; Mercaptals containing sulfur atoms bound to acyclic or cycloaliphatic carbon atoms containing hydroxy groups; Derivatives thereof, e.g. sulfurised phenols
- C10M2219/088—Neutral salts
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
- C10M2219/08—Thiols; Sulfides; Polysulfides; Mercaptals
- C10M2219/082—Thiols; Sulfides; Polysulfides; Mercaptals containing sulfur atoms bound to acyclic or cycloaliphatic carbon atoms
- C10M2219/087—Thiols; Sulfides; Polysulfides; Mercaptals containing sulfur atoms bound to acyclic or cycloaliphatic carbon atoms containing hydroxy groups; Derivatives thereof, e.g. sulfurised phenols
- C10M2219/089—Overbased salts
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
- C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
- C10M2223/04—Phosphate esters
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
- C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
- C10M2223/04—Phosphate esters
- C10M2223/042—Metal salts thereof
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- C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
- C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
- C10M2223/04—Phosphate esters
- C10M2223/045—Metal containing thio derivatives
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- C10N2010/00—Metal present as such or in compounds
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- C10N2010/00—Metal present as such or in compounds
- C10N2010/06—Groups 3 or 13
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- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/12—Inhibition of corrosion, e.g. anti-rust agents or anti-corrosives
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- C10N2070/00—Specific manufacturing methods for lubricant compositions
- C10N2070/02—Concentrating of additives
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- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
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- Organic Chemistry (AREA)
- Lubricants (AREA)
Abstract
Aliphatic sulphur compounds obtained by heating an aliphatic sulphide containing not less than 14 carbon atoms in the molecule with sulphur and/or selenium (see Group IV (b)) are used to stabilize, e.g. viscose oily polymers of propylene oxide. They are preferably used in amounts of 0.2 to 1 per cent by weight, based on the finished oil composition or greater amounts, e.g. 2 to 25 per cent may be used to produce concentrates for later blending with more oil.ALSO:Aliphatic sulphur compounds useful as anti-oxidants especially for mineral lubricating oils are obtained by heating a mixture of an aliphatic sulphide containing at least 14 carbon atoms in the molecule with sulphur or selenium at a temperature and for a time sufficient to combine stably with the aliphatic sulphide 15 to 45 per cent by weight of sulphur or 10 to 45 per cent of selenium or 15 to 45 per cent of a mixture of sulphur and selenium based on the weight of sulphur originally present in the sulphide so that said added element exhibits substantially no tendency to separate on cooling to 77 DEG F. The aliphatic sulphide used as starting material contains in the molecule one or more groups \sYC-(S)n-C\sZ, wherein the carbon atoms are aliphatic and n is 1, 2 or 3, preferably 1 or 2. There may be a plurality of such groups in one molecule, thus poly-monosulphides and poly-disulphides may be used. The radicals attached to the sulphur may be open chain or cyclic aliphatic radicals, saturated or unsaturated, and may be substituted by polar groups or by aromatic radicals. Specified sulphides are cetyl ethyl monosulphide, didecyl-, dilauryl-, dicetyl- and dibenzylmonosulphides; didecyl-, dilauryl, dibenzyl- and dicetyl disulphides; didodecyl ethylene dithioether, dimonosulphides of the type R-S-(CH2)n-S-R wherein the R's are aliphatic groups and n is 1 or 2 and the products of condensing polychlorinated aliphatic hydrocarbons with sodium monosulphide. Also specified are didodecyl ethylene di-disulphide and di-disulphides of the type R-S2-(CH2)n-S2-R where the R's are aliphatic groups and n is 1 or 2, and the products of condensing polychlorinated aliphatic hydrocarbons with sodium disulphide. The preferred aliphatic sulphides are the diparaffin sulphides obtained by condensing chlorinated paraffin wax with an alkali p metal monosulphide, an alkali metal polysulphide or a mixture of an alkali metal sulphide and sulphur. The paraffin wax used is preferably one having a melting point of 120 DEG to 160 DEG F. and this is chlorinated to about 15 to 25 per cent chlorine content. Any form of free sulphur or selenium may be used, e.g. flowers of sulphur, roll sulphur and red selenium. Mixtures of selenium and sulphur may be used. The reaction temperature is preferably 275 DEG to 350 DEG F. In examples: (1) chlorinated paraffin wax is prepared by chlorinating a 130 DEG F. melting point paraffin wax to 20 per cent chlorine content by bubbling chlorine through it at 190 DEG to 200 DEG F. The chlorinated wax is then added slowly to a refluxing mixture of alcohol, sodium monosulphide and sulphur in a pressure vessel. The mixture is finally heated to 270 DEG F. under increased pressure. The pressure is then released, the alcohol distilled off and the mixture diluted with petroleum thinner to deposit sodium chloride. The thinner solution is filtered and the thinner distilled off. The diparaffin sulphide obtained is then heated to 300 DEG F. in a jacketed steel mixture and flowers of sulphur added slowly, the mixture being then maintained at 300 DEG F. for a further period of time to yield a product from which no sulphur separates out on cooling; (2) a diparaffin sulphide prepared as in (1) is heated with selenium at 375 DEG F., yielding a dark brown product. Further examples are given (see Group III) to illustrate the use of the products of examples (1) and (2) as antioxidants in mineral lubricating oils. U.S.A. Specification 2,346,157 is referred to.ALSO:Aliphatic sulphur compounds obtained by heating an aliphatic sulphide containing not less than 14 carbon atoms in the molecule with sulphur and/or selenium (see Group IV (b)) are used to stabilize hydrocarbon and non-hydrocarbon lubricating oils, e.g. light to heavy petroleum lubricating oils of naphthenic, paraffinic and mixed base origins, vegetable oils and viscous oily polymers of propylene oxide. They may be used in amounts of 0.1 to 2 per cent by weight based on the finished composition or greater amounts, e.g. 2 to 25 per cent may be used to produce concentrates for later blending with more oil. They may be used in mineral lubricating oils in conjunction with oil-soluble polyvalent metal salts of organic acids or organo-substituted inorganic acids, oil-soluble polyvalent metal salts of phenols, i.e. phenates such as the calcium, barium and aluminium salts of cetyl phenol and diamyl diphenol monosulphide, oil-soluble polyvalent metal organo sulphonates such as calcium, barium and aluminium mahogany sulphonates and oil-soluble calcium, barium and aluminium alkyl benzene sulphonates; phosphates and thiophosphates such as calcium and zinc salts of dicetyl phosphoric acid, dimethylcyclohexyl dithiophosphoric acid and dicetyl phenyl dithiophosphoric acid and other oil-soluble polyvalent metal salts of organo substituted sulphur-containing acids of phosphorus; calcium, barium and aluminium naphthenates and calcium and barium salts of aliphatic carboxylic acids such as a -phenyl stearic acid, a -cetyl succinic acid and the acid lauryl ester of succinic acid. In examples: (1) the product obtained by heating chlorinated paraffin wax with sodium monosulphide and sulphur to form a diparaffin sulphide and then heating the latter with sulphur or selenium, is added to heavy white oil and subjected to oxidator tests; (2) a blend of solvent refined California paraffinic and naphthenic oils containing a small amount each of calcium dicetyl phenyl dithiophosphate, a sulphurized phenate (product of heating sulphur with the calcium salt of an alkylated phenol produced by alkylating phenol with a butene polymer) and of the sulphur-diparaffin sulphide product of (1) is subjected to an engine performance test; (3) as in (2) but using solvent-refined California paraffinic oil as base oil; (4) as in (2) but using a highly-refined mixed base oil from mid-continent crude (mixed asphaltic paraffinic base). Comparative examples are given in each case using the intermediate diparaffin sulphide product of example (1) instead of the sulphur-sulphide or selenium-sulphide product.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US634787A US2514625A (en) | 1945-12-13 | 1945-12-13 | Lubricating oil composition |
Publications (1)
Publication Number | Publication Date |
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GB640148A true GB640148A (en) | 1950-07-12 |
Family
ID=24545190
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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GB31389/46A Expired GB640148A (en) | 1945-12-13 | 1946-10-22 | Aliphatic sulphur compounds and compositions containing same |
Country Status (2)
Country | Link |
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US (1) | US2514625A (en) |
GB (1) | GB640148A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3352695A (en) * | 1965-01-18 | 1967-11-14 | Gorham Corp | Silver polish containing di-n-hexadecyl disulfide |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2726236A (en) * | 1953-02-02 | 1955-12-06 | Shell Dev | Production of sulfur-containing high molecular weight hydrocarbon derivatives |
US3013970A (en) * | 1955-01-27 | 1961-12-19 | Lubrizol Corp | Gear lubricant improving agents |
US3013971A (en) * | 1955-01-27 | 1961-12-19 | Lubrizol Corp | Gear lubricant improving agents |
US3013969A (en) * | 1955-01-27 | 1961-12-19 | Lubrizol Corp | Gear lubricant improving agents |
US2885425A (en) * | 1956-01-27 | 1959-05-05 | Du Pont | Stabilization of organic isocyanates |
BE572417A (en) * | 1957-10-31 | |||
NL124029C (en) * | 1960-01-21 | |||
US3208940A (en) * | 1961-04-10 | 1965-09-28 | Gen Electric | Lubricating compositions and methods of lubricating |
US3510428A (en) * | 1967-12-22 | 1970-05-05 | Gulf Research Development Co | Lubricating composition |
GB1235896A (en) * | 1968-05-24 | 1971-06-16 | Mobil Oil Corp | Multifunctional fluid |
GB1488922A (en) * | 1974-12-17 | 1977-10-19 | Exxon Research Engineering Co | Halogen containing disulphides |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
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US2110281A (en) * | 1934-03-31 | 1938-03-08 | Standard Oil Co | Pure compounds as extreme-pressure lubricants |
US2192874A (en) * | 1936-06-12 | 1940-03-05 | Gulf Oil Corp | Lubrication of special alloy bearings |
US2337473A (en) * | 1940-09-28 | 1943-12-21 | Texas Co | Sulphurization of hydrocarbons |
US2338829A (en) * | 1941-05-06 | 1944-01-11 | Du Pont | Chemical process and product |
US2344392A (en) * | 1941-11-08 | 1944-03-14 | American Cyanamid Co | Crankcase lubricant and chemical compound therefor |
US2342572A (en) * | 1941-11-08 | 1944-02-22 | American Cyanamid Co | Crankcase lubricant and chemical compound therefor |
US2346157A (en) * | 1942-02-16 | 1944-04-11 | Standard Oil Co | Compounded oil |
US2344393A (en) * | 1942-02-18 | 1944-03-14 | American Cyanamid Co | Lubricating oil composition |
US2346155A (en) * | 1942-02-23 | 1944-04-11 | Standard Oil Co | Compounded oil |
US2398415A (en) * | 1943-02-22 | 1946-04-16 | California Research Corp | Mineral oil composition and the like |
US2398416A (en) * | 1943-05-10 | 1946-04-16 | California Research Corp | Compounded oil |
-
1945
- 1945-12-13 US US634787A patent/US2514625A/en not_active Expired - Lifetime
-
1946
- 1946-10-22 GB GB31389/46A patent/GB640148A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3352695A (en) * | 1965-01-18 | 1967-11-14 | Gorham Corp | Silver polish containing di-n-hexadecyl disulfide |
Also Published As
Publication number | Publication date |
---|---|
US2514625A (en) | 1950-07-11 |
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