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2 104 358

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C1

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IPC

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Application

96108217/12, 1996-04-24

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Actual filing date

1996-04-24

(45)

Published

1998-02-10

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Inventor

Osipova N.N.Ryzhov A.I.Gubanov V.A.Korotkov S.N.Zhivetin V.V.Osipov B.P.Ostrovskaja A.V.

(73)

Holder

Tsentral'Nyj Nauchno-Issledovatel'Skij Institut Kompleksnoj Avtomatizatsii Legkoj Promyshlennosti

WOOL PRODUCTION PROCESS Russian patent published in 1998 - IPC

Abstract RU 2104358 C1

FIELD: pulp-and-paper industry. SUBSTANCE: line fiber is first mechanically cleaned, refined by alkali cooking in presence of reducing agent, and bleached by sodium hypochlorite in two steps. In the first step, bleaching is carried out at pH 6 to 9 with sodium hypochlorite concentration 1-2 g/l. In the second stage, bleaching is carried out at pH 7 to 10 and 1-2 g/l sodium hypochlorite with intermediate washing and acidification, after which acidification is conducted with intermediate and final washings. Finally washed out fiber is dried and hackled. EFFECT: enhanced efficiency of process. 2 tbl

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RU 2 104 358 C1

Authors

Osipova N.N.

Ryzhov A.I.

Gubanov V.A.

Korotkov S.N.

Zhivetin V.V.

Osipov B.P.

Ostrovskaja A.V.

Dates

1998-02-10—Published

1996-04-24—Filed

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