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2 045 597

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IPC

(21) (22)

Application

93042744/12, 1993-08-25

(22)

Actual filing date

1993-08-25

(45)

Published

1995-10-10

(72)

Inventor

Zakharov Valentin IvanovichBogdan Vasilij MakarovichShalimova Tamara ViktorovnaLazareva Militsa AleksandrovnaBelodubrovskij Roman Borisovich

(73)

Holder

Zakharov Valentin IvanovichBogdan Vasilij MakarovichShalimova Tamara ViktorovnaLazareva Militsa AleksandrovnaBelodubrovskij Roman Borisovich

METHOD FOR PRODUCTION OF CELLULOSE Russian patent published in 1995 - IPC

Abstract RU 2045597 C1

FIELD: production of paper and chemical processing. SUBSTANCE: wood chips are impregnated with water or aqueous solution of sodium hydroxide and/or sodium sulfite in amount of 0.5-10.0% of mass of absolutely dry wood chips. Moistening solution is withdrawn. Impregnated wood chips are subjected to prehydrolysis at temperature of 190-230 C for 0.5-10.0 min. Mass is subjected to alkali cooking with sulfate or soda lye. Prior to cooking, pressure may be instantaneously released down to atmospheric. EFFECT: higher efficiency. 4 cl, 5 tbl

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RU 2 045 597 C1

Authors

Zakharov Valentin Ivanovich

Bogdan Vasilij Makarovich

Shalimova Tamara Viktorovna

Lazareva Militsa Aleksandrovna

Belodubrovskij Roman Borisovich

Dates

1995-10-10—Published

1993-08-25—Filed