润滑科技信息平台

Mineral lubricating oil

专利摘要

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基本信息

专利类型:
发明专利
申请/专利号:
US1946659668
申请日期:
1946-04-04
专利申请人:
SHELL DEVLOPMENT CO
分类号:
-
发明/设计人:
LOON MINTJE VAN
权利要求: The invention claimed is:1. A lubricating oil comprising a mineral lubricating oil containing dissolved therein .1% to 1% of an oil-soluble composition produced by subjecting the zinc salt of di-isopropyl salicylic acid in the presence of a stable hydrocarbon oil to a temperature of about 300° C. and for a period of time of from % to 11/2 hours sufficient to effect the substantially complete redissolving of the precipitate formed by the decomposition of the salt in said stable hydrocarbon oil.2. The lubricating oil according to claim 1, wherein the oil-soluble additive is prepared in the presence of a mineral lubricating oil.3. The lubricating oil according to claim 1, wherein the oil-soluble additive is prepared in the presence of a highly refined mineral oil having a boiling range of between about 80° C. and about 170° C. at 0.05 mm. mercury pressure, and wherein said additive is separated from its solution in said highly refined mineral oil prior to incorporation into the mineral lubricating oil.4. A lubricating oil composition comprising a mineral lubricating oil containing dissolved therein .1% to 1% of an oil-soluble composition produced by subjecting the zinc salt of an alkyl-substituted salicylic acid said alkyl radical containing from about 3 to about 16 carbon atoms, in the presence of a substantially non-polar fluid, to a temperature of about 300° C. for from % to 1½ hours until the precipitate formed by the decomposition of the salt is substantially completely redissolved in said non-polar fluid.5. A lubricating oil comprising a mineral lubricating oil containing dissolved therein .1% to 1% of an oil-soluble composition produced by subjecting the cobalt salt of di-isopropyl salicylic acid in the presence of a substantially non-polar stable fluid to a temperature of about 300° C. until the precipitate formed by the decomposition of the salt is substantially completely redissolved in said non-polar fluid medium.6. A lubricant comprising a mineral lubricating oil containing dissolved therein .1% to 1% of an oil-soluble compound produced by subjecting a salt of a polyvalent metal of the group consisting of the second, third, sixth and iron groups of the periodic table and of an alkyl-substituted salicylic acid said alkyl radical containing from about 3 to about 16 carbon atoms, in the presence of a stable substantially non-polar fluid medium, to an elevated temperature of from 290 to 300° C. for from % to 1½ hours and for a period of time sufficient to effect the substantially complete redissolving in said non-polar fluid of the precipitate formed by the thermal decomposition of the salt.7. A lubricant comprising a mineral lubricating oil containing dissolved therein .1% to 1% of an oil-soluble salt produced by subjecting a salt of a polyvalent metal of the group consisting of the second, third, sixth and iron groups of the periodic table and of an aromatic hydroxy mono-carboxylic acid in which the carboxylic radical is in ortho position to the hydroxy radical, in the presence of a stable substantially non-polar fluid medium, to an elevated temperature of from 290 to 300° C. for from % to 1½ hours for a period of time sufficient to effect substantial redissolving in the non-polar fluid medium of the precipitate formed by the thermal decomposition of the salt.8. A lubricant comprising a mineral lubricating oil containing dissolved therein .1% to 1% of oilsoluble salt produced by subjecting a salt of a polyvalent metal of the group consisting of the second, third, sixth and iron groups of the periodic table and of an hydroxy aromatic monocarboxylic acid, in the presence of a stable substantially non-polar fluid to an elevated temperature of from 290 to 300° C. for from % to 1½ hours until the precipitate formed by the decomposition of said salt is substantially redissolved in said stable substantially non-polar fluid medium.MINTJE van LOON.The following references are of record in the file of this patent: