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Application

97116666/12, 1997-10-08

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Actual filing date

1997-10-08

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Published

1998-06-27

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Inventor

Mutovina M.G.Bondareva T.A.Samsonov N.E.Fadeev B.A.Kirsanov V.A.Tol'Man G.Ju.Timoshevskij A.N.Dedik Ju.P.Efimova V.N.Savin A.A.Foteev M.A.Miklina N.V.Vladimirov A.M.Sablin V.A.Ovchinnikov B.A.Beznosov Ju.N.Fetisova L.E.Orekhov B.V.Baranov V.I.Lozhkin G.A.Penjagin S.Ju.Andriets A.A.Petrov V.V.Ponomarev S.A.

(73)

Holder

Otkrytoe Aktsionernoe ObshchestvoKamskij Tselljulozno-Bumazhnyj KombinatZakrytoe Aktsionernoe Obshchestvo Tsbk"Sovmestnoe Predprijatie Aktsionernoe ObshchestvoAktsionernoe Obshchestvo

METHOD OF PREPARING BISULFITE CELLULOSE Russian patent published in 1998 - IPC

Abstract RU 2114230 C1

FIELD: production of bisulfite. SUBSTANCE: chip is subjected to impregnation with solution containing MgO and Na2O at 115-120 C pressure of (4.0-7.0)*105H/m2 and pH of 2.3-3.2 for 1.5-2 h. Solution is used at MgO and Na2O ratio from 9:1 to 1:1.5 and contains 4.0-5.5 wt % SO2. Solution is then boiled. Boiling operation is carried out at 153-158 C and pressure of 6.3-7.0 105H/m2 H/sq.m. Claimed method makes it possible to improve of cellulose due to improving whiteness and increasing tearing resistance and reducing amount of unwelded portion. EFFECT: more efficient preparation method. 2 cl, 1 tbl

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RU 2 114 230 C1

Authors

Mutovina M.G.

Bondareva T.A.

Samsonov N.E.

Fadeev B.A.

Kirsanov V.A.

Tol'Man G.Ju.

Timoshevskij A.N.

Dedik Ju.P.

Efimova V.N.

Savin A.A.

Foteev M.A.

Miklina N.V.

Vladimirov A.M.

Sablin V.A.

Ovchinnikov B.A.

Beznosov Ju.N.

Fetisova L.E.

Orekhov B.V.

Baranov V.I.

Lozhkin G.A.

Penjagin S.Ju.

Andriets A.A.

Petrov V.V.

Ponomarev S.A.

Dates

1998-06-27—Published

1997-10-08—Filed

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