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Process for dewaxing waxy hydrocarbon oils using ketone dewaxing solvent and a polyvinylpyrrolidone dewaxing aid
Process for dewaxing waxy hydrocarbon oils using ketone dewaxing solvent and a polyvinylpyrrolidone dewaxing aid
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机译:使用酮脱蜡溶剂和聚乙烯吡咯烷酮脱蜡助剂对蜡质烃油进行脱蜡的方法
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摘要
A waxy hydrocarbon oil, such as a bright stock fraction is dewaxed in a ketone dewaxing process at an increased rate, relative to existing processes, by employing polyvinylpyrrolidone (PVP) as a dewaxing aid. Preferably the PVP has a number average molecular weight in the range of from 150,000 to 400,000, e.g. about 360,000, and as little as 100 ppm based on the waxy oil can result in almost a 50% increase in the filter rate of the dewaxed oil from the wax.
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