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2 021 407

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IPC

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Application

4921360/12, 1991-03-21

(22)

Actual filing date

1991-03-21

(45)

Published

1994-10-15

(72)

Inventor

Jakovenko P.I.Shuljatikov O.P.Bogdan V.M.Sergeev A.D.Stromskij S.V.Che S.G.

(73)

Holder

Aktsionernoe Obshchestvo Sibirskij Nauchno-Issledovatel'Skij Institut Lesnoj I Tselljulozno-Bumazhnoj Promyshlennosti

METHOD FOR PRODUCING BLEACHED SULFATE CELLULOSE Russian patent published in 1994 - IPC

Abstract RU 2021407 C1

FIELD: chemistry. SUBSTANCE: essence of this method resides in that steam and foul-smelling matter separated from hot black sulfate liquor at cooling latter in evaporating cyclone are admixed with cellulose suspension and oxidizer at stage of oxygen-alkali delignification of unbleached cellulose or oxygen-alkali delignification with addition of hydrogen peroxide or oxidative alkalization of chlorinated cellulose stock. EFFECT: lower rate of consumption of steam both for neutralizing foul-smelling matter and bleaching cellulose, high degree of decontamination of foul-smelling matter by oxidation to nontoxic and nonvolatile oxygen derivatives of sulfur. 2 tbl

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RU 2 021 407 C1

Authors

Jakovenko P.I.

Shuljatikov O.P.

Bogdan V.M.

Sergeev A.D.

Stromskij S.V.

Che S.G.

Dates

1994-10-15—Published

1991-03-21—Filed

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