METHOD FOR RECOVERY/REUSE OF N-OXYL COMPOUND - NIPPON PAPER INDUSTRIES CO., LTD.

Title:

METHOD FOR RECOVERY/REUSE OF N-OXYL COMPOUND

Document Type and Number:

WIPO Patent Application WO/2010/116794

Kind Code:

A1

Abstract:

In the oxidation of a cellulose raw material with an oxidizing agent in the presence of an N-oxyl compound and a bromide and/or an iodide, a liquid waste produced in the oxidation is desalted by means of electrophoresis until the inorganic salt concentration is reduced to less than 0.4%, thereby recovering the N-oxyl compound contained in the liquid waste in a concentrated form. The recovered N-oxyl compound can be reused in the oxidation of the cellulose raw material. It is preferred that the liquid waste be reduced or treated with an ion exchange resin prior to the electrophoresis.

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Inventors:

MIYAWAKI, Shoichi (Pulp and Paper Research Laboratory, 21-1, Oji 5-chome, Kita-k, Tokyo 02, 〒1140002, JP)
宮脇　正一 (〒02 東京都北区王子５丁目２１番１号　日本製紙株式会社　技術研究所内 Tokyo, 〒1140002, JP)
KATSUKAWA, Shiho (Pulp and Paper Research Laboratory, 21-1, Oji 5-chome, Kita-k, Tokyo 02, 〒1140002, JP)
勝川　志穂 (〒02 東京都北区王子５丁目２１番１号　日本製紙株式会社　技術研究所内 Tokyo, 〒1140002, JP)
ABE, Hiroshi (Pulp and Paper Research Laboratory, 21-1, Oji 5-chome, Kita-k, Tokyo 02, 〒1140002, JP)

Application Number:

JP2010/052277

Publication Date:

October 14, 2010

Filing Date:

February 16, 2010

Export Citation:

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Assignee:

NIPPON PAPER INDUSTRIES CO., LTD. (4-1 Oji 1-chome, Kita-ku Tokyo, 02, 〒1140002, JP)
日本製紙株式会社 (〒02 東京都北区王子１丁目４番１号 Tokyo, 〒1140002, JP)
MIYAWAKI, Shoichi (Pulp and Paper Research Laboratory, 21-1, Oji 5-chome, Kita-k, Tokyo 02, 〒1140002, JP)
宮脇　正一 (〒02 東京都北区王子５丁目２１番１号　日本製紙株式会社　技術研究所内 Tokyo, 〒1140002, JP)
KATSUKAWA, Shiho (Pulp and Paper Research Laboratory, 21-1, Oji 5-chome, Kita-k, Tokyo 02, 〒1140002, JP)
勝川　志穂 (〒02 東京都北区王子５丁目２１番１号　日本製紙株式会社　技術研究所内 Tokyo, 〒1140002, JP)

International Classes:

C07D211/94; D01F2/00; B01J31/02; B01J38/00; C08B15/02

Attorney, Agent or Firm:

ONO, Shinjiro et al. (YUASA AND HARA, Section 206 New Ohtemachi Bldg., 2-1, Ohtemachi 2-chome, Chiyoda-k, Tokyo 04, 〒1000004, JP)

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