METHOD OF REMOVING EXTRACTIVE SUBSTANCES WHEN PRODUCING CELLULOSE, CELLULOSE OBTAINED USING SAID METHOD AND USE THEREOF Russian patent published in 2013 - IPC C08B1/00

Abstract RU 2500688 C2

FIELD: chemistry.

SUBSTANCE: method involves preparing acid liquor by adding a soap-oil mixture to pulping liquor and heating the cellulose material in the presence of the acid liquor. Resin-free cellulose is obtained when extractive substances are removed in the presence of the soap-oil mixture.

EFFECT: low power consumption when processing wastes for recycling, low concentration of resins and minimising precipitation thereof, low consumption of sulphuric acid.

19 cl, 1 tbl, 2 ex

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Authors

Vinberg Kennet

Virkkala Tero

Fagerudd Simon

Pietilja Teuvo

Nordbjak Kaj

Vestin Sven

Dates

2013-12-10—Published

2010-04-01—Filed