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2 099 455

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C1

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IPC

(21) (22)

Application

93033715/12, 1993-07-01

(22)

Actual filing date

1993-07-01

(45)

Published

1997-12-20

(72)

Inventor

Sergeev A.D.Ushakova I.V.Kovrizhkin S.D.Petrenev V.A.

(73)

Holder

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

METHOD OF PRODUCING CELLULOSE FOR CHEMICAL PROCESSING Russian patent published in 1997 - IPC

Abstract RU 2099455 C1

FIELD: pulp- and-paper industry. SUBSTANCE: wood material is passed through hydrolysis, alkali digestion, and diffusion washing zones in continuous digesting apparatus. In the diffusion washing zone, hot refining and cellulose delignification are performed. EFFECT: enhanced efficiency of process.

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RU 2 099 455 C1

Authors

Sergeev A.D.

Ushakova I.V.

Kovrizhkin S.D.

Petrenev V.A.

Dates

1997-12-20—Published

1993-07-01—Filed

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