申请人:Sumitomo Chemical Company, Limited
公开号:EP1988074A1
公开(公告)日:2008-11-05
To provide a method for producing dialkylhydroperoxybenzene by liquid-phase oxidation of dialkylbenzene, wherein the method comprises the following steps,
Oxidation step: a step of obtaining a oxidation reaction liquid having pH of 9 to 12, which contains dialkylhydroperoxybenzene, unreacted dialkylbenzene, and by-produced hydroperoxybenzenes by subjecting an oxidation raw material solution containing dialkylbenzene to oxidation reaction,
Aqueous solution extracting step: a step of extracting the oxidation reaction liquid with an alkaline aqueous solution to obtain a water layer mainly containing dialkylhydroperoxybenzene and by-produced hydroperoxybenzenes, and an oil layer mainly containing dialkylbenzene, and
Recycle step: a step of recycling and feeding at least a part of the oil layer obtained in the aqueous solution extracting step to the oxidation step,
wherein the oxidation step comprises two or more reaction sections of a first section and subsequent sections arranged in series, and the temperature of the first reaction section is set to be higher than an average temperature of the whole reaction sections by 2.5°C or more.
提供一种通过二烷基苯的液相氧化生产二烷基过氧基苯的方法,其中该方法包括以下步骤:
1. 氧化步骤:将含有二烷基苯的氧化原料溶液进行氧化反应,得到pH值为9到12的氧化反应液,其中包含二烷基过氧基苯、未反应的二烷基苯和副产的过氧基苯。
2. 水溶液提取步骤:用碱性水溶液提取氧化反应液,得到主要包含二烷基过氧基苯和副产的过氧基苯的水层,以及主要包含二烷基苯的油层。
3. 回收步骤:将水溶液提取步骤中获得的至少一部分油层回收并送回氧化步骤。
其中,氧化步骤包括两个或更多反应段,第一个反应段的温度比整个反应段的平均温度高出2.5°C或更多。