METHOD FOR REGENERATING WORKING SOLUTION USED FOR PRODUCTION OF HYDROGEN PEROXIDE AND METHOD FOR PRODUCING HYDROGEN PEROXIDE USING REGENERATED WORKING SOLUTION

WIPO Patent Application WO/2015/025735

A1

In the production of hydrogen peroxide, a higher alcohol component in an organic solvent changes into a ketone body and increase in the ketone bodies reduces water content of a working solution and causes deterioration of catalytic activity. In addition, increase in the ketone bodies may obstruct stable and safe operation during the production of hydrogen peroxide due to decrease in the solubility of anthrahydroquinones, crystallization, precipitation, etc. The objective of the present invention is to provide a method for improving hydrogen peroxide production efficiency by regenerating an altered substance (ketone body) derived from a polar solvent in the working solution used for the production of hydrogen peroxide by the anthraquinone method to the original alcohol component. Hydrogen peroxide can be produced more efficiently by distilling off the organic solvent component including the ketone body from the working solution which has been used over time and hydrogenating the same under the presence of a metal catalyst to regenerate to the original alcohol component.

HASEGAWA HIROSHI (JP)
WADA YUKAKO (JP)
TAKEUCHI MOTOHARU (JP)

PCT/JP2014/070973

February 26, 2015

August 08, 2014

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MITSUBISHI GAS CHEMICAL CO (JP)

C01B15/023; B01J23/86; C07C37/07; C07C39/12; C07B61/00

WO2007129769A1

2007-11-15

JP2009034663A	2009-02-19
JPH06135705A	1994-05-17

KOBAYASHI Hiroshi et al. (JP)
Kobayashi 浩 (JP)

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