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Separation of 2,6-dimethylnaphthalene

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专利汇可以提供Separation of 2,6-dimethylnaphthalene专利检索,专利查询,专利分析的服务。并且PURPOSE: A mixture containing 2,6-dimethylnapthalene (DMN) and other DMN isomers is extracted with a fluid of critical state and 2,6-DMN is separated in high efficiency as an extraction residue.
CONSTITUTION: A mixture containing 2,6-DMN and other DMN isomers (e.g. a cycle oil having a boiling point range of 250W275°C and obtained by the catalytic cracking of vacuum gas oil originated from petroleum) is extracted with a gas of a state above critical temperature and exceeding critical pressure (preferably a gas having a critical temperature of 0W100°C, especially room temperature W40°C). The components other than 2,6-DMN are extracted and transferred to the gas and the 2,6-DMN is left as an extraction residue. The above gas may contain ≤10wt%, especially 2W7wt% compound having affinity to the substance to be extracted, e.g. water, alcohol, ether or hydrocarbon. The extraction is preferably carried out with carbon dioxide at 30W50°C under 73W400 bar pressure.
COPYRIGHT: (C)1987,JPO&Japio,下面是Separation of 2,6-dimethylnaphthalene专利的具体信息内容。

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