Method for recovery/reuse of N-oxyl compound

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United States of America Patent

PATENT NO 8865886
APP PUB NO 20120065389A1
SERIAL NO

13257732

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Abstract

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An effluent produced in oxidation of a cellulosic material with an oxidizing agent in the presence of an N-oxyl compound and a bromide and/or iodide is deionized by electrodialysis to an inorganic salt concentration of less than 0.4%, whereby the N-oxyl compound in the effluent is concentrated and recovered. The N-oxyl compound thus recovered can be reused in oxidation of a cellulosic material. Preferably, the effluent is subjected to reduction treatment and ion exchange resin treatment prior to the electrodialysis.

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Patent Owner(s)

  • NIPPON PAPER INDUSTRIES CO., LTD.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Abe, Hiroshi Tokyo, JP 461 4849
Iijima, Yuko Tokyo, JP 19 360
Isogai, Akira Tokyo, JP 61 1133
Katsukawa, Shiho Tokyo, JP 4 109
Miyawaki, Shoichi Tokyo, JP 14 181

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