CELLULOSE PRODUCTION PROCESS Russian patent published in 1999 - IPC

Abstract RU 2125625 C1

FIELD: pulp-and-paper industry. SUBSTANCE: cellulose is impregnated with sodium sulfite and subjected to preliminary hydrolysis at 170-175 C for 60-120 min until pH 6.0-6.5 is attained. This operation is followed by alkaline cooking with sulfate or soda lye. Sodium sulfide is used in the form of solution consumed in quantity 2.4-3.6 the weight of absolutely anhydrous raw material. EFFECT: improved delignification and reduced sulfur- containing waste due to reduced sulfide uptake. 3 cl, 2 tbl

Similar patents RU2125625C1

Title	Year	Author	Number
COMPOSITION FOR PREPARING CELLULOSE	1995	Kozlov I.A. Zakazov A.N. Babkin V.A. Derjagina Eh.N. Sergeev A.D. Levanova E.P. Sukhomazova Eh.N. Makerov P.V.	RU2104353C1
CELLULOSE PRODUCTION PROCESS	2000	Kozlov I.A. Kuznetsov B.N.	RU2158326C1
METHOD OF PRODUCING CELLULOSE FOR CHEMICAL PROCESSING	2020	Azanov Mikhail Valentinovich Dyachenko Leonid Romanovich Tyurin Evgenij Timofeevich Fadeev Boris Alekseevich Saushkin Vasilij Vasilevich Zujkov Aleksandr Aleksandrovich Goryachev Nikita Leonidovich	RU2738813C1
PROCESS FOR MANUFACTURE OF CELLULOSE	1992	Sergeev A.D. Bogdan V.M. Ushakova I.V. Basov V.M. Gondjukhina L.I. Moskal' S.V.	RU2051256C1
METHOD FOR PRODUCTION OF CELLULOSE	1993	Zakharov Valentin Ivanovich Bogdan Vasilij Makarovich Shalimova Tamara Viktorovna Lazareva Militsa Aleksandrovna Belodubrovskij Roman Borisovich	RU2045597C1
METHOD FOR OBTAINING CELLULOSE FOR CHEMICAL PROCESSING FROM CELLULOSE-CONTAINING RAW MATERIALS	2020	Shulzhenko Dmitrij Vladimirovich Bessonova Irina Yurevna Azanov Mikhail Valentinovich Dyachenko Leonid Romanovich Fadeev Boris Alekseevich Tyurin Evgenij Timofeevich Zujkov Aleksandr Aleksandrovich	RU2763878C1
METHOD OF PRODUCING CELLULOSE FOR MANUFACTURE OF VISCOSE FIBER	1993	Vol'Fgang Vitsani Andreas Krochek Jokhann Shuster Karl Lakner	RU2122055C1
PROCESS FOR PRODUCING CELLULOSE	0	Prokshin Gennadij Fedorovich Nadein Aleksandr Filippovich Palmova Svetlana Borisovna Bogomolov Boris Dmitrievich Nechaeva Elena Mikhajlovna Lichutin Arkadij Fedorovich	SU1133319A1
CELLULOSE PRODUCTION PROCESS	2005	Vurasko Alesja Valer'Evna Driker Boris Nutovich Golovkin Mikhail Aleksandrovich	RU2287035C1
METHOD FOR MANUFACTURING SOLUBLE WOOD FIBRE PULP	2019	Kettunen, Auvo Laakso, Sampsa Haatainen, Tiina Paananen, Markus	RU2793493C2

RU 2 125 625 C1

Authors

Barnakov Ch.N.

Dates

1999-01-27—Published

1997-12-23—Filed