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US 5,242,613 AGranted
Process for mixed extreme pressure additives
AssigneeEthyl Corporation
InventorsNubar Ozbalik, Robert I. Davidson
Life of this patent
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AssigneeEthyl Corporation
InventorsNubar Ozbalik, Robert I. Davidson
Estimating the term…
This invention relates to additives for oleaginous fluids containing extreme pressure and antiwear agents and containing less than 15 GC area percent higher dialkyl polysulfides and to a process for their production comprising: a) forming a first reaction mass comprising olefin, a sulfur source, and a catalyst; b) heating the first reaction mass to a temperature and for a period of time which is sufficient to form a mixture of dialkyl disulfides, dialkyl trisulfides and higher dialkyl polysulfides; c) forming a second reaction mass comprising the mixture of dialkyl disulfides, dialkyl trisulfides and higher dialkyl polysulfides formed in step (b), an organo phosphorus compound, and optionally an amine; d) heating the second reaction mass to a temperature and for a period of time which are sufficient to convert at least a portion of the higher dialkyl polysulfides to dialkyl trisulfide; and e) recovering said mixed additive containing extreme pressure agents and antiwear agents, wherein said recovered mixed additive contains less than 15 GC area percent higher dialkyl polysulfides.
A method for preparing an essentially chlorine free mixed additive containing extreme pressure agents and antiwear agents for oleaginous fluids, wherein said additive contains less than 15 GC area percent higher dialkyl polysulfides, said process comprising:
An essentially chlorine free additive composition for oleaginous fluids containing extreme pressure and antiwear agents and containing less than 15 GC area percent higher dialkyl polysulfides, said additive made by a process comprising:
A process for preparing an essentially chlorine free additive mixture containing extreme pressure and antiwear agents, said process comprising reacting the reaction product of (i) olefin, (ii) hydrogen sulfide, (iii) flowers of sulfur, and (iv) an alumina catalyst with a dibutyl hydrogen phosphite and an amine so as to yield an additive mixture comprising more than about 30 GC area percent di-t-butyl trisulfide, from about 5 to about 30 GC area percent di-t-butyl disulfide, from about 2 to about 40 GC area percent of a reaction product of higher di-t-butyl polysulfide amine and dibutyl hydrogen phosphite and less than 15 GC area percent higher dialkyl polysulfides.
Dependencies are inferred from the claim text.