LIGNIN COMPOSITION, ITS PRODUCTION AND CEMENT DISPERSANT USING THE SAME

Japanese Patent JP3024526

B2

PROBLEM TO BE SOLVED: To obtain a lignin composition showing high surface tension when using as an aqueous solution, readily and economically producible, and useful e.g. in a dye industrial field and also useful as a cement dispersant by specifying the contents of either or both of aluminum and iron within prescribed ranges.
SOLUTION: This lignin composition is obtained by adding one or both of (B) a water-soluble aluminum compound and (C) a water-soluble iron compound to (A) a lignin solution and continuing the reaction of the mixture until attaining (D) 0.01-0.4wt.% content of an extract with chlorotrifluoroethylene dimer. The objective composition finally contains 0.05-5wt.% (based on a solid component of the lignin solution) of one or both of aluminum and iron and 0.01-0.4wt.% (based on the solid component of the lignin solution) content of the extract with chlorotrifluoroethylene dimer. Preferably, an oxidized pulp discharged solution treated with alkali at a high-temperature and under a high pressure or a purified solution of the discharged solution by an ultrafiltration is used as the component A.

Hideaki Sekitoku
Toshihiro Sugiwaki
Masanobu Kawamura
Tomoyuki Nakamoto

JP26274995A

March 21, 2000

October 11, 1995

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NIPPON PAPER INDUSTRIES CO.,LTD.

C04B24/18; C04B24/22; C08H6/00; C08H7/00; C08H99/00; C08K3/10; C08L97/00; C09K23/00; C09K23/50; (IPC1-7): C08L97/00; B01F17/50; C04B24/18; C04B24/22; C08H5/04; D21C11/00

JP4182336A
JP3141142A
JP5884159A

Kazuo Kawasumi

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