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
  • C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
  • C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
• • 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
  • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
  • C10N2010/00—Metal present as such or in compounds
• • 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
  • C10N2010/04—Groups 2 or 12
• • 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

Definitions

• VGC thenic oil-possessinga VGC of at least ;8'70.
• barium soap greases have been recog- 5 -It wasalso fourrdthat upon cooling thebarium ".nized as'a'desirable adjunct to the more convensoap base following dehydration:thestructure of tiona'l line oflubricating greases by virtue of their the base -undergoes acomplete- 'phase" change.
• the concentration of the soap is approximately 50% or greater considerable load is applied to the stirring mechanism and if the stirring mechanism becomes overloaded it may be desirable to incorporate small amounts of the mineral lubricating oil to reduce the load on the stirring mechanism.
• the addition of the mineral oil at this stage should be controlled so that the concentration of the soap is not reduced to substantially below 40%.
• any conventional fatty acid material may be used as the acid component of the barium soap, the best yields and quality of grease are obtained by charging fatty acids or mixtures thereof and particularly fatty acids containing at least 16 carbon atoms or predominating amounts of fatty acids of at least 16 carbon atoms.
• Glycerides such as are contained in the natural fats may be used provided the free glycerin formed on saponification is substantially removed by steam distillation or by prolonged heating in the dehydration stage.
• the fatty acids found suitable for the preparation of the barium greases include such acids as stearic, palmitic, behenic, oleic, hydroxy stearic, etc.
• a naphthenic mineral oil possessing a VGC of at least 0.870 is required to effect solvation of the barium soap formed in the saponification stage of the process.
• This naphthenic mineral oil may be either a distillate or residual lubricating oil of the desired viscosity or may consist of a blend of lubricating oils in which the VGC of the final blend is at least 0.870.
• the amount of the naphthenic mineral oil charged in the saponification stage is not critical to the invention but for ease of manufacture it is preferable to employ approximately an equal weight of mineral oil based upon the weight of the fatty acids charged. After the saponiflcation further processing and finishing of the grease base may be conducted with any of the conventional lubricating oils, irrespective of the naphthenicity or paraffinicity of the oil.
• barium soap greases can be prepared neutral or containing free acid or free alkali, as desired, without producing any adverse effect on the stability of the product.
• Example 310 grams of stearic acid and 372 grams of a naphthenic Pale Oil possessing a S. U. V. at F. of 312 and a VGC of 0.884 were charged to a grease kettle.
• the stearic acid was melted at 210 F., at which temperature 563 grams of a hot aqueous solution of barium hydroxide (17.6% Ba(OH) 2) were added followed by 50 ml. of water. This mixture was stirred at 210 F. for one-half hour after all the water had evaporated.
• the temperature was then raised to 310 F. in 25 minutes and held at this temperature for 15 minutes, at which point the grease base was a stiff, taffy-like mass and rather rubbery.
• a method of preparing a normal barium soap grease composition which comprises saponifying a soap-forming fatty acid with not more than the stoichiometric equivalent of barium hydrate in the presence of a mineral oil possessing a VGC of at least 0.870 to produce a saponification product of normal barium soap, dehydrating the saponification product at temperatures not in excess of the melting point of the soap base, cooling the dehydrated product with continuous stirring to a temperature below the critical transition temperature of the grease base without reducing the concentration of the soap component to substantially below 40%, thereafter adding mineral lubricating oil to obtain the desired consistency and drawing the resulting grease composition.
• a method of preparing a normal barium soap grease composition which comprises saponifying a fatty acid containing at least 16 carbon, atoms with substantially the stoichiometric quantity of barium hydrate in the presence of a mineral oil possessing a VGC of at least 0.870 to produce a saponification product of normal barium soap, dehydrating the saponification product at temperatures not in excess of the melting point of the soap base, cooling the dehydrated product with continuous stirring to a temperature of approximately 200 F. without reducing the concentration of the soap component to substantially below 40%, thereafter adding mineral lubricating oil to obtain the desired consistency and drawing the resulting grease composition.
• a method of preparing a normal barium soap grease composition which comprises saponifying a fatty acid containing at least 16 carbon atoms with barium hydrate, in stoichiometric quantities required for the preparation of a normal barium soap, in the presence of a mineral oil possessing a VGC of at least 0.870, dehydrating the saponification product at temperatures not in excess of the melting point of the soap base, cooling the dehydrated product with continuous stirring to a temperature below the critical transition temperature of the normal soap base without reducing the concentration of the normal soap component to substantially less than 40%, thereafter adding mineral lubricating oil to obtain the desired consistency and drawing the finished grease composition.
• a method of preparing a normal barium soap grease composition which comprises saponifying a fatty acid containing at least 16 carbon atoms with substantially the stoichiometric quantity of barium hydrate in the presence of sufiiicient mineral lubricating oil possessing a VGC of at least 0.870 to effect solvation of the resulting normal barium soap, dehydrating the saponification product at temperatures of approximately 300-320 F., cooling the dehydrated product with continuous stirring to a temperature of approximately 200 F. without reducing the concentration of the soap component to sub s-tantially below 40%, thereafter adding mineral lubricating oil to obtain the desired consistency and drawing the resulting grease composition.
• a method of preparing a normal barium soap grease composition which comprises saponifying a fatty acid containing at least 16 carbon atoms with not more than the stoichiometric equivalent of barium hydrate in the presence of approximately equal weights, based upon the weight of fatty acid, of a mineral oil possessing a VGC of at least 0.870 to produce an oil solu tion of normal barium soap dehydrating the saponification product at temperatures not in excess of the melting point of the soap base,
• a method of preparing a normal barium stearate grease composition which comprises saponifying stearic acid with not more than the stoichiornetric equivalent of barium hydrate in the presence of a mineral oil possessing a VGC of at least 0.870 to produce normal barium stearate, dehydrating the saponification product at temperatures not in excess of the melting point of the soap base, cooling the dehydrated product with continuous stirring to a temperature of approximately 200 F. without reducing the concentration of the barium stearate to substantially below 40%, adding mineral lubricating oil to obtain the desired consistency and drawing the resulting grease composition.
• a method of preparing a normal barium stearate grease composition which comprises saponifying stearic acid with substantially the stoichiometric quantity of barium hydrate in the presence of about an equal quantity based on the stearic acid of a mineral lubricating oil possessing a VGC of at least 0.870 to produce an oil solution of normal barium stearate, dehydrating the sapqnification proctuct at temperatures above 300 F. but not in excess of the melting point of the soap base, cooling the dehydrated product with continuous stirring to a temperature of approximately 200 F. without reducing the concentration of the barium stearate to substantially below thereafter adding mineral lubricating oil to obtain the desired consistency and drawing the resulting grease composition.

Landscapes

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

Priority Applications (3)

Applications Claiming Priority (1)

Publications (1)

Family

ID=24870862

Family Applications (1)

Country Status (3)

Cited By (3)

Citations (4)

• 0
  • FR FR956525D patent/FR956525A/fr not_active Expired
• 1946
  • 1946-12-06 US US714640A patent/US2450224A/en not_active Expired - Lifetime
• 1947
  • 1947-11-21 GB GB30924/47A patent/GB651339A/en not_active Expired

Patent Citations (4)

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