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2 244 774

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IPC

(21) (22)

Application

2004103285/12, 2004-02-06

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Start date

2004-02-06

(22)

Actual filing date

2004-02-06

(45)

Published

2005-01-20

(72)

Inventor

Kirsanov V.A.Kirsanova L.D.Mutovina M.G.Bondareva T.A.Tjurin E.T.Musinskij V.V.Ivanov V.F.

(73)

Holder

Otkrytoe Aktsionernoe Obshchestvo Nauchno-Issledovatel'Skij Institut Bumagi"

METHOD FOR PRODUCTION OF MAGNESIUM-BASED BISULFITE COOKING LIQUOR FOR CELLULOSE MANUFACTURING Russian patent published in 2005 - IPC

Abstract RU 2244774 C1

FIELD: pulp-and-paper industry, in particular cellulose production.

SUBSTANCE: sulfur dioxide is brought into reaction with magnesia raw material (e.g. cake brucite ) with grade of 50-600 mm and initial pH 1.5-2.5. Process is carried out up to pH 2.8-3.5 and content bonded sulfur dioxide 47.0-49.5 % followed by separation of exhaust gas from solution. One-step process is carried out at 70-90⁰C.

EFFECT: method of improved processibility due to decreased number of process steps.

1 tbl, 3 ex

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RU 2 244 774 C1

Authors

Kirsanov V.A.

Kirsanova L.D.

Mutovina M.G.

Bondareva T.A.

Tjurin E.T.

Musinskij V.V.

Ivanov V.F.

Dates

2005-01-20—Published

2004-02-06—Filed