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IPC

(21) (22)

Application

96114249/12, 1996-07-22

(22)

Actual filing date

1996-07-22

(45)

Published

1998-03-10

(72)

Inventor

Mutovina M.G.Samsonov N.E.Bondareva T.A.Fadeev B.A.Tol'Man G.Ju.Timoshevskij A.N.Dedik Ju.P.Banzina L.N.Efimova V.N.Borodulin G.A.Prosolova V.Z.Zakharenko V.N.Kirsanov V.A.Savin A.A.

(73)

Holder

Kamskij Tselljulozno-Bumazhnyj KombinatAktsionernoe Obshchestvo Otkrytogo Tipa Tsentral'Nyj Nauchno-Issledovatel'Skij Institut Bumagi

METHOD FOR PRODUCTION OF CHEMICAL CELLULOSE Russian patent published in 1998 - IPC

Abstract RU 2106448 C1

FIELD: production of chemical cellulose at sulfite plants of paper and pulp industry. SUBSTANCE: method includes acid cooking of cellulose-containing raw material in bisulfite solution in cooker, separation of spent solution and hot refining of cooking product with sodium hydroxide in the presence of magnesium oxide taken in the amount of 5-10% of sodium hydroxide weight. Acid cooking is conducted at pH 1.8-2.15 with content of SO₂ 5.1-5.4% and temperature of 148-151 C. Bisulfite solution is used in the form of bisulfite solution on sodium base or on mixed base in the form of mixture of MgO and Na₂O and their ratio from 1:1 to 1:4. EFFECT: higher efficiency. 2 cl, 1 tbl

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	0		SU256502A1

RU 2 106 448 C1

Authors

Mutovina M.G.

Samsonov N.E.

Bondareva T.A.

Fadeev B.A.

Tol'Man G.Ju.

Timoshevskij A.N.

Dedik Ju.P.

Banzina L.N.

Efimova V.N.

Borodulin G.A.

Prosolova V.Z.

Zakharenko V.N.

Kirsanov V.A.

Savin A.A.

Dates

1998-03-10—Published

1996-07-22—Filed