Raffinade dewatering technology in anthraquinone method production of hydrogen peroxide

Abstract

The invention discloses a raffinade dewatering technology in anthraquinone method production of hydrogen peroxide. The technology comprises the following steps: conveying raffinade from an extraction tower to a filter through a pump, filtering to remove particles in the raffinate; allowing the obtained filtrate to go through an oil-water separation device to dewater the filtrate in order to eliminate the destroys of an alkali solution to a carclazyte bed; and regenerating the dewatered raffinate through the clay bed, and circulating to enter a hydrogenation process. The dewatering technology using the oil-water separation device to remove water in the raffinate substitutes traditional alkali solution dewatering technologies, so the destroys of the alkali solution to the carclazyte bed are eliminated, thereby a circulating working fluid cannot be polluted by alkali metal ions, and the content of water not dissolved in the circulating working fluid is reduced reduces to several to dozens of ppm.

Description

technical field [0001] The invention relates to a process for liquid-liquid separation, in particular to a process for removing water from an anthraquinone-based hydrogen peroxide raffinate. Background technique [0002] At present, the anthraquinone process is the most important hydrogen peroxide production process. The working liquid is hydrogenated to obtain a hydrogenated liquid (hydrogenation process), the hydrogenated liquid is oxidized to obtain an oxidized liquid (oxidation process), and the oxidized liquid is extracted with pure water to obtain an extract and an extract. Raffinate (extraction process), raffinate is composed of working fluid, a small amount of water and hydrogen peroxide. Hydrogen peroxide can be dissolved in water in any proportion. When the working fluid containing hydrogen peroxide is recycled, there is a danger of explosion, and the working fluid needs to be dehydrated. , so that the hydrogen peroxide content in the circulating working fluid is ≤...

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Problems solved by technology

[0007] In the above dehydration process, the traditional alkaline solution dehydration process is used. The residual alkaline solution will cause damage to the clay bed. At the same time, there will be alkali metal ions in the circulating working fluid, and the quality of hydrogen peroxide produced cannot meet the increasingly stringent hydrogen peroxide. Product quality standards, so that when hydrogen peroxide is used to produce cyclohexanone, it is affected by alkali metal ions

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