METHOD FOR PRODUCING DIALKYL POLYSULFIDE, DIALKYL POLYSULFIDE, EXTREME-PRESSURE ADDITIVE AND LUBRICATING FLUID COMPOSITION
申请人:DIC Corporation
公开号:EP3034492A1
公开(公告)日:2016-06-22
For the purpose of 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).
为了有效地生产一种可用作不易腐蚀金属表面的极压添加剂的二烷基多硫化物,以及一种包括该二烷基多硫化物的极压添加剂和润滑油组合物,提供了一种生产二烷基多硫化物的方法,包括第一步使通式(1)代表的烯烃化合物(a)反应:R1R2C=CHR3(其中 R1 和 R2 各为烷基,R3 为氢原子或烷基,且 R1、R2 和 R3 的碳原子总数为 2 至 20)在硫化氢存在下与硫反应,从而得到粗二烷基多硫化物(A)、第二步:将粗制二烷基多硫化物(A)和碱金属的硫化物在包括醇在内的溶剂中反应,从而减少粗制二烷基多硫化物(A)中的硫原子数。