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Patent Searching and Data


Title:
CELLULOSE PRODUCTION METHOD
Document Type and Number:
WIPO Patent Application WO/2016/072885
Kind Code:
A3
Abstract:
The invention relates to the chemical industry, and more particularly to a method for producing cellulose from different cellulosic raw materials for the paper and textile industries and other branches of industry, including for gunpowder technologies. The present method consists in soaking and hydrolysing a raw material in an environment of a hydrolysis solution, filtering cellulose, rinsing with water, filtering, and drying, accompanied by the implementation of cycles that include heating the material to a temperature of 115°C or less, and rapid vacuum pulse action with a change of pressure in a range of up to 5 mmHg for a period of less than 10 seconds, and subsequently holding in a vacuum and releasing the vacuum. The proposed method is universal. A solution of nitric or sulphuric acid, or a combination thereof, or an alkaline solution can be used as the hydrolysis solution. A solution of spent acids from nitrocellulose production can be used, thus reducing costs. The technical result of the claimed method consists in the production of cellulose of the required grade from any cellulosic raw material, a significant reduction in the length of the cellulose hydrolysis process, and a reduction in the temperature of the processes for producing the required chemical and structural uniformity of cellulose, without the need for special equipment. The method makes it possible to favour hydrolysis using acidic solutions, thus simplifying the composition of the hydrolysis solution.

Inventors:
ABRAMOV YAKOV KUZMICH (RU)
VESELOV VLADIMIR MIHAILOVICH (RU)
ZALEVSKY VIKTOR MIHAILOVICH (RU)
TAMURKA VITALY GRIGOREVICH (RU)
VOLODIN VENIAMIN SERGEEVICH (RU)
EVDOKIMOV VLADIMIR DMITRIEVICH (RU)
MIRONOV BORIS IVANOVICH (RU)
VATUEVA OLGA BORISOVNA (RU)
GUKASOV NIKOLAY ALEKSANDROVICH (RU)
MARSHANNIKOVA LIUDMILA MIKHAILOVNA (RU)
MORDVINOVA TATYANA MIKHAILOVNA (RU)
SALOMATINA NATALIA ALEKSANDROVNA (RU)
SARYCHEV DMITRY KONSTANTINOVICH (RU)
PILGUN ALEKSANDR IVANOVICH (RU)
BIRIUKOVA VALENTINA IVANOVNA (RU)
Application Number:
PCT/RU2015/000869
Publication Date:
June 23, 2016
Filing Date:
December 11, 2015
Export Citation:
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Assignee:
OBSCHESTVO S OGRANICHENNOY OTVETSTVENNOSTYU TWIN TECHNOLOGY COMPANY (RU)
International Classes:
D21C1/00
Foreign References:
RU2456394C12012-07-20
RU2033254C11995-04-20
SU1109058A31984-08-15
US2308564A1943-01-19
Other References:
See also references of EP 3216917A4
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