Classifications

• • 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
  • C10M5/00—Solid or semi-solid compositions containing as the essential lubricating ingredient mineral lubricating oils or fatty oils and their use
• • 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
  • C10M2207/12—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
• • 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
  • C10M2207/12—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
  • C10M2207/122—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of seven or less carbon atoms monocarboxylic
• • 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
  • C10M2207/12—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
  • C10M2207/124—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of seven or less carbon atoms containing hydroxy groups; Ethers thereof
• • 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
  • C10M2207/12—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
• • 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
  • C10M2207/12—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
• • 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
  • C10M2207/40—Fatty vegetable or animal oils
• • 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
  • C10M2207/40—Fatty vegetable or animal oils
  • C10M2207/404—Fatty vegetable or animal oils obtained from genetically modified species
• • 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
  • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant Compositions
  • C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
  • C10M2215/06—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to carbon atoms of six-membered aromatic rings
  • C10M2215/064—Di- and triaryl amines
  • C10M2215/065—Phenyl-Naphthyl amines
• • 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
  • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant Compositions
  • C10M2215/08—Amides [having hydrocarbon substituents containing less than thirty carbon atoms]
• • 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
  • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant Compositions
  • C10M2215/08—Amides [having hydrocarbon substituents containing less than thirty carbon atoms]
  • C10M2215/082—Amides [having hydrocarbon substituents containing less than thirty carbon atoms] containing hydroxyl groups; Alkoxylated derivatives
• • 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
  • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant Compositions
  • C10M2215/086—Imides [having hydrocarbon substituents containing less than thirty carbon atoms]
• • 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
  • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant Compositions
  • C10M2215/14—Containing carbon-to-nitrogen double bounds, e.g. guanidines, hydrazones, semicarbazones
• • 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
  • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant Compositions
  • C10M2215/24—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant Compositions having hydrocarbon substituents containing thirty or more carbon atoms, e.g. nitrogen derivatives of substituted succinic acid
  • C10M2215/28—Amides; Imides
• • 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
  • 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
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
  • C10N2010/00—Metal present as such or in compounds
  • C10N2010/02—Groups 1 or 11
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • 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
  • C10N2030/08—Resistance to extreme temperature
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
  • C10N2040/00—Specified use or application for which the lubricating composition is intended
  • C10N2040/02—Bearings
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
  • C10N2040/00—Specified use or application for which the lubricating composition is intended
  • C10N2040/12—Gas-turbines
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
  • C10N2040/00—Specified use or application for which the lubricating composition is intended
  • C10N2040/12—Gas-turbines
  • C10N2040/13—Aircraft turbines
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
  • C10N2050/00—Form in which the lubricant is applied to the material being lubricated
  • C10N2050/10—Form in which the lubricant is applied to the material being lubricated semi-solid; greasy
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
  • C10N2070/00—Specific manufacturing methods for lubricant compositions

Definitions

• the present invention relates to new and improved lubricating greasesand to. a new process of preparingthe same. More particularly, the invention pertains to a method of manufiacturing new and improved lubricating greases of high dropping poi-ntand-soft consistency over a wide temperature range and to greasesproduced by this method.
• the invention provides for the preseason of greases in which the thickenin agent is a iniiitti're or fatty acid soap obtained by sapo'ni-fic'ation and cr me product obtained by heating g'lyce'ri'ne at high temperature in the presence of alkali.
• the thickenin agent is a iniiitti're or fatty acid soap obtained by sapo'ni-fic'ation and cr me product obtained by heating g'lyce'ri'ne at high temperature in the presence of alkali.
• I-Iigh tempera- 't'ure greases of *ei'r'cel l'en't "quality may be produced in this "manner.
• Thes'e greases have been prepa'r d' B'y 'the sapohification arrap'e'seed oil with *an-excess of alkali Whileheating toa temperaturebetween 48'6" and 520 F. 'in a lubricating oil vehicle containing a entail atho'unt-of sodium sulfona'te as described-in "S. I atent Ne. 226591.
• :glyceride-type fats and oils and mixtures approximating the composition of such fats and oils may be used quite generally inplaceaof rapeseed oil for the production of high temperature greases of excellent quality provided a large ex cessuof aikaii over the amount required for sapon-ification of the giycerides or neutralization of thecfatty :acid .is employed, and saponification or neutralization properisfo'llowed' by heating of the-reaction mixture' to such temperatures substantially exceeding 520 F. as are conducive-to alkali fusion of the glycerine with accompanying evolution of hydrogen.
• Whilethereaction mechanism is not fully understood, it may be postulated (that, in the second high temperature stage, the :glycerine split off duringthe-carlier 'saponificationv stage or otherwise introduced into the :reaction mixture is dehydrated to form acroleinor a dimer thereof. Upon continued heating the acrolein or its dimer isconverted into a salt by alkali .fusion either directly or via the-Cannizzaro reaction. Alkali fusioniof the alcohol formed in theCanniZzaro reaction v rnayralso occur. Reactions of the following type may be involved:
• alkaliliusionaccomjpanied'by gas eyolution andtoarning may begin at about perature greases based on raw materials other tha'nrarie 0 an s op zi bou '5 Q" mpa t: abou nd"5 0' 1 h cor sp din empe atur i the lease of unsaturated'sap'onifiable'materials.
• Soap-forming base materials useful for the purposes of -the"preseht invention-arequiteagenerally saturated or unand should not exceed about twice that amount.
• cooling saturated or hydrogenated naturally occurring glyceridetype fats and oils of animal or vegetable nature, such as tallow, hog fat, etc. which begin to react with alkali to produce hydrogen at temperatures above about 520 F., as well as mixtures of saturated and/or unsaturated high molecular weight fatty acids with glycerine.
• Mixtures of glycerides with fatty acids and glycerine can, of course, be used.
• saturated acids those containing 12-30 carbon atoms, such as lauric or myristic, and preferably palmitic, stearic, behenic acids are operable.
• the preferred unsaturated acids are those containing at least 18 and up to about 22 carbon atoms.
• the acids containing conjugated bonds such as the acids of oiticica, tung and similar drying oils should be used if at all in small quantities since they tend to polymerize giving undesirable properties.
• the propor tion of glycerine is preferably that corresponding to or approximating the glyceride of the fatty acid involved In the latter case, correspondingly larger amounts of alkali should be used.
• an oil soluble sulfonic 'compound derived from petroleum should be added to increase the soft and unctuous quality of the grease and its temperature stability.
• a petroleum sulfonic acid or an alkali metal soap thereof may be used for this purpose.
• Other conventional grease additives, such as antioxidants, especially amino compounds, dispersauts, extreme pressure agents containing sulfur, etc., may be added.
• suitable lubricating oil bases mineral oils or unsaponifiable synthetic oils should be used until alkali fusion is completed.
• a non-paraflinic mineral oil may be employed in this stage of the process.
• any desired type of lubricating oil including ester-type synthetic oils may be added.
• Greases in accordance with the invention, quite generally, may be prepared as follows.
• the glyceride or a mixture of high molecular weight fatty acids with glycerine is charged together with about 50% of the total lubricating oil requirement to a heated grease kettle and warmed to about 130-150 F.
• Alkali metal hydroxide preferably sodium hydroxide is added in an amount at least twice, but preferably greater than twice, as much as that required to saponify the fat or acid.
• An excess of 100-125% over saponification requirements should be used, preferably in the form of a 50% aqueous solution of NaOH.
• the temperature is then raised to about 350-400 F. and the balance of the lubricating oil is added.
• Heating is continued to melt the mass completely and beyond this point until foaming begins, becoming appreciable at temperatures of about 530-550 F. Foaming is usually violent enough to require top stirring which prevents overflowing. The temperature is further raised until foaming commences to recede, which takes place after a temperature rise of about F. This temperature which usually falls between about 550 and 570 F. is maintained for about 20-40 minutes until foaming has ceased.
• the grease may then be allowed to cool to about 300-330 F. whereupon at least a portion of the remaining excess alkali may be neutralized by the addition of fat or fatty acid.
• the grease should have a free alkalinity of less than 1.0%.
• further quantities of lubricating oil may be added to adjust the grease consistency to the desired degree. Concentrations of 15-30 wt. percent, based on the finished grease, of total soaptype thickener are suitable for the purposes of the inventimes of about 8-22 hours have been used heretofore when working with rapeseed oil. Similar cooling times may be employed in the present process. It has been found, however, that the cooling time may be shortened to as little as 610 hours for the temperature interval from about 570 F. to about 200 F.
• Greases obtained in accordance with the present invention have dropping points substantially in excess of 400 F. They have a soft, unctuous consistency at temperatures above 20 F. and retain the same over a wide temperature range.
• EXAMPLE I About 20 parts by weight of hydrogenated tallow and 36 parts by weight of low cold test naphthenic type mineral oil having a viscosity of S. S. U. at 210 F. (oil A) were charged to a fire heated grease kettle and warmed to F. About 6 parts by weight of sodium hydroxide in a 50% aqueous solution was charged, the quantity of NaOH being more than twice that required to saponify the fat. The temperature was then raised to 400 F. where an additional 36 parts by weight of a low cold test naphthenic type mineral oil having a viscosity of 40 S. S. U. at 210 F. (oil B) was added. Heating was continued. At 500 F., the grease was completely molten with only slight foam formation.
• a sample taken at 500 F. had a dropping point of 457 F. while a sample taken at 570 F. had a dropping point of 482 F.
• the grease was cooled .while stirring to 330 F. when sufficient hydrogenated tallow was added to neutralize /3 of the remaining excess caustic. A sufficient amount of oil B was added to hold the soap concentration at 20% by weight.
• the cold grease had the following properties.
• Appearance--excellent, smooth, uniform short fiber product Water solubility5% loss in AN--G-15 water washing test 1 Method described in AN-G-15 Government specification.
• the gas evolved during fusion had the following composition:
• this grease has a highly satisfactory dropping point and may be homogenized to acquire satisfactory penetration characteristics.
• the rapeseed oil and /2 of the mineral oil was charged to a fire heated grease kettle and warmed to 150 F. while agitating.
• the sodium sulfonate-niineral oil solution was added followed by a 40% aqueous solution of the sodium hydroxide.
• the temperature was raised and the soap formed was dehydrated at 300-350 F. At this temperature the balance of the mineral oil was slowly added while continuing to raise the temperature.
• a second reaction initiated as indicated by foam formation. This foaming continued while the temperature was raised to 500 F. At this temperature foaming ceased, heating was discontinued and the grease cooled while agitating to 275 F. when the inhibitors were added.
• the grease was further cooled to 200 F. and filtered while drawing in packages.
• Experiment C The same ingredients as in Experiment B were 'used and treated as in Experiments A and .B except that heating was continuedabove '500"F. 'At"53'0 .'F., the second reaction initiated. .It was'eomple'tedat 550 F. This grease'wa'sthen finished as in Experiments A andB.
• the present invention is not limited to any theory of the process of grease manufacture nor to the specific examples set forth above.
• the relative proportions of the grease constituents may be varied within the limits indicated to obtain greases of different consistency and varying characteristics.
• saponifying, saponifiable and saponification refer to the formation of soaps by an alkali treatment of fats, oils and/or fatty acids.
• the process of preparing lubricating greases adapted for lubrication at high temperatures which comprises saponifying in a mineral lubricating oil in grease-making proportions a saponifiable material selected from the group consisting of (1) mixtures consisting of saturated high molecular weight fatty acids and glycerine, (2) mixtures consisting of unsaturated high molecular weight fatty acids and glycerine, said glycerine being present in an amount corresponding to that present in the glycerides of said fatty acids and (3) glycerides of high molecular weight fatty acids, with an amount of sodium hydroxide which is about 100 to 125% more than that required to saponify said material, heating the resulting mixture to complete the saponification of the fatty acids, continuing heating at a temperature of about 530 to 570 F. until hydrogen gas evolution recedes, and then cooling to obtain said lubricating grease.
• a saponifiable material selected from the group consisting of (1) mixtures consisting of saturated high molecular weight
• soap-forming material comprises a free fatty acid selected from the group consisting of oleic, myristic, palmitic, stearic, arachidic, behenic and myristoleic acids.

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• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• General Chemical & Material Sciences (AREA)
• Oil, Petroleum & Natural Gas (AREA)
• Organic Chemistry (AREA)
• Lubricants (AREA)

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Citations (15)

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  • NL NL95544D patent/NL95544C/xx active
• 1952
  • 1952-05-24 US US289897A patent/US2790769A/en not_active Expired - Lifetime
• 1953
  • 1953-03-17 GB GB7323/53A patent/GB736890A/en not_active Expired
  • 1953-04-25 FR FR1078726D patent/FR1078726A/fr not_active Expired
  • 1953-05-23 DE DEST6459A patent/DE1012017B/de active Pending

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