Production of aliphatic alcohol ethoxylate
专利汇可以提供Production of aliphatic alcohol ethoxylate专利检索，专利查询，专利分析的服务。并且PURPOSE: To readily obtain the title substance, useful as various detergents and having a narrower addition molar distribution, by extracting an aliphatic alcohol ethoxylate with CO
2 in a supercritical or pseudocritical state as an extracting agent.
CONSTITUTION: Ethylene oxide is added to an aliphatic alcohol in the presence of an acidic or basic catalyst to provide the title substance having an ethylene oxide addition molar distribution. The resultant substance is then extracted with CO
2 in a supercritical or pseudocritical state as an extracting agent to afford the title substance having a narrower addition molar distribution. The supercritical state refers to a state in which the CO
2 is kept at a temperature under a pressure of ≥31°C critical temperature and ≥73atm critical pressure. The pseudocritical state refers to a state in which the CO
2 is kept at ≥20°C under ≥ the saturation vapor pressure thereof at the temperature and-other than the critical state. Since the CO
2 is not heated at high temperatures by the above-mentioned method, there is no fear of coloring or degradation and deterioration and the ash content is low.
COPYRIGHT: (C)1989,JPO&Japio，下面是Production of aliphatic alcohol ethoxylate专利的具体信息内容。
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