发明名称 |
METHOD FOR PRODUCING DIALKYL POLYSULFIDE, DIALKYL POLYSULFIDE, EXTREME-PRESSURE ADDITIVE AND LUBRICATING FLUID COMPOSITION |
摘要 |
For efficiently producing a dialkyl polysulfide which is able to be favorably used as an extreme-pressure additive which does not easily corrode the metal surface, and an extreme-pressure additive and lubricating fluid composition including the dialkyl polysulfide, provided is a method for producing dialkyl polysulfide including a first step of reacting an olefin compound (a) represented by General Formula (1): R1R2C═CHR3 (where R1 and R2 each are an alkyl group, R3 is a hydrogen atom or an alkyl group, and the total number of carbon atoms of R1, R2 and R3 is 2 to 20) with sulfur in the presence of a hydrogen sulfide to thereby obtain crude dialkyl polysulfide (A), and a second step of reacting the crude dialkyl polysulfide (A) and a sulfide of an alkali metal in a solvent including an alcohol to thereby reduce the number of sulfur atoms in the crude dialkyl polysulfide (A). |
申请公布号 |
US2016215231(A1) |
申请公布日期 |
2016.07.28 |
申请号 |
US201415023862 |
申请日期 |
2014.09.18 |
申请人 |
DIC CORPORATION |
发明人 |
Iba Takafumi;Sakata Hiroshi |
分类号 |
C10M135/22;C07C321/18;C07C319/24 |
主分类号 |
C10M135/22 |
代理机构 |
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代理人 |
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主权项 |
1. A method for producing dialkyl polysulfide, comprising:
a first step of reacting an olefin compound (a) represented by General Formula (1): R1R2C═CHR3 (where R1 and R2 each are an alkyl group, R3 is a hydrogen atom or an alkyl group, and the total number of carbon atoms of R1, R2 and R3 is 2 to 20) with sulfur in the presence of a hydrogen sulfide to thereby obtain a crude dialkyl polysulfide (A); and a second step of reacting the crude dialkyl polysulfide (A) and a sulfide of an alkali metal in a solvent including an alcohol to reduce the number of sulfur atoms in the crude dialkyl polysulfide (A). |
地址 |
Tokyo JP |