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2 118 675

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IPC

(21) (22)

Application

96120797/12, 1996-10-21

(22)

Actual filing date

1996-10-21

(45)

Published

1998-09-10

(72)

Inventor

Aleksandrova G.P.Medvedeva S.A.Medvedeva E.N.Babkin V.A.Rybal'Chenko N.A.Stupina Eh.S.Sergeev A.D.Petrenev V.A.Sinitsyn A.P.Popova N.N.Okunev O.N.Solov'Eva I.V.

(73)

Holder

Irkutskij Institut Khimii So Ran

METHOD OF LEAFY SULFATE CELLULOSE WHITENING Russian patent published in 1998 - IPC

Abstract RU 2118675 C1

FIELD: paper and pulp industry. SUBSTANCE: nonbleached cellulose is subjected preliminary for enzyme preparation effect from Aspergillus heteromorphous at activity 30-150 U/g cellulose at mass concentration 5-10% for 1-4 h at 30-50 C. Then cellulose is subjected for treatment with hydrogen peroxide in alkaline medium. EFFECT: increased whiteness at stage of biological treatment and final whiteness of cellulose semifinished product. 1 tbl, 13 ex

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RU 2 118 675 C1

Authors

Aleksandrova G.P.

Medvedeva S.A.

Medvedeva E.N.

Babkin V.A.

Rybal'Chenko N.A.

Stupina Eh.S.

Sergeev A.D.

Petrenev V.A.

Sinitsyn A.P.

Popova N.N.

Okunev O.N.

Solov'Eva I.V.

Dates

1998-09-10—Published

1996-10-21—Filed