Mineral oil based scrubbing liquid composition

摘要

A mineral oil based scrubbing liquid composition, suitable for use in removing hydrocarbons and/or other organic compounds impurities from a gas, comprises (i) a major proportion by weight of at least one mineral oil which essentially wholly distils between a minimum temperature not less than 250°C and a maximum temperature not higher than 600°C; (ii) 0.05 to 0.5 wt % in total of at least one antioxidant compound, preferably a sterically hindered phenolic compound; and further contains (iii) up to 1.0 wt % in total of one or more additives, which additives are either (a) one or more ionic or non-ionic surface active agents or (b) said surface active agent(s) together with one or more oil-soluble polymers having a minimum number average molecular weight of 15,000. Preferred surface active agents are sulphonates or alkylbenzene sulphonates. Preferred polymers are poly(iso)butenes.