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2 231 588

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IPC

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Application

2003117345/12, 2003-06-11

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Start date

2003-06-11

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Actual filing date

2003-06-11

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Published

2004-06-27

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Inventor

Mutovina M.G.Bondareva T.A.Fadeev B.A.D'Jakov N.A.Dedik Ju.P.Timoshevskij A.N.Banzina L.N.Efimova V.N.Sukhanov G.A.Shtalkin N.G.Foteev M.A.Isakova V.S.Tatarchuk V.I.

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Holder

Otkrytoe Aktsionernoe Obshchestvo KombinatOtkrytoe Aktsionernoe Obshchestvo Nauchno-Issledovatel'Skij Institut Bumagi"

CELLULOSE MANUFACTURE PROCESS Russian patent published in 2004 - IPC

Abstract RU 2231588 C1

FIELD: paper-and-pulp industry.

SUBSTANCE: process of manufacturing cellulose from mixture of coniferous and deciduous wood involves impregnation of raw wood material with sulfite cooking liquor at elevated temperature. In particular, impregnation is carried out at 107-112^оС and cooking at pH 1.8-2.0 and 146-150^оС. Coniferous raw material is supplemented by deciduous wood at following proportions of wood components, wt %: fir wood 50-70 and birch wood 30-50; or fir wood 45-50, pine wood 15-25, and birch wood 25-35; or fir wood 60-70 and aspen wood 30-40; or fir wood 40-60, pine wood 20-30, and aspen wood 20-30.

EFFECT: improved quality of cellulose.

2 cl, 1 tbl, 11 ex

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RU 2 231 588 C1

Authors

Mutovina M.G.

Bondareva T.A.

Fadeev B.A.

D'Jakov N.A.

Dedik Ju.P.

Timoshevskij A.N.

Banzina L.N.

Efimova V.N.

Sukhanov G.A.

Shtalkin N.G.

Foteev M.A.

Isakova V.S.

Tatarchuk V.I.

Dates

2004-06-27—Published

2003-06-11—Filed