US 9,522,991 B2 · Cellulose solution manufacturing method, cellulose precipitate manufacturing method, cellulose saccharification method, cellulose solution, and cellulose precipitate

Abstract

The invention relates to a cellulose solution manufacturing method including: performing an ozonation treatment to bring a cellulose-containing material and ozone into contact with each other; and performing an alkali treatment to bring the obtained treated material and an alkali aqueous solution into contact with each other, thereby dissolving at least cellulose in the cellulose-containing material brought into contact with the ozone in the alkali aqueous solution. According to the invention, it is possible to provide a method of manufacturing a cellulose solution in which cellulose can be dissolved in a more simple manner, a method of manufacturing a cellulose precipitate in which cellulose can be recovered from the cellulose solution, and a method of saccharifying cellulose which uses the cellulose precipitate.

Claims9

Dependent claims

A cellulose solution manufacturing method comprising:

providing a cellulose-containing material, wherein said cellulose-containing material comprises at least one of cotton, lyocell, rayon, and cupra;
contacting said cellulose-containing material with ozone to obtain an ozonated cellulose-containing material;
drying said ozonated cellulose-containing material at a temperature in the range of 50° C. to 160° C. to obtain a dried treated material;
mixing said dried treated material with a 1N to 5N sodium hydroxide aqueous solution to obtain a mixture;
and
maintaining said mixture at a temperature of −10° C. to 50° C. for 0.1 minute to 60 minutes to dissolve at least cellulose and obtain a cellulose solution comprising dissolved cellulose having a polymerization degree of 50 to 50,000.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application

13/703,125Filed 22 Sep 2011

Priority

JP 2010-21412424 Sep 2010

Published

US 2013/0177948 A111 Jul 2013

Granted

20 Dec 2016

Term ends

Not estimatedThe source records don’t support an estimate.

Classification20 codes

C08L 1/02
Compositions of cellulose, modified cellulose or cellulose derivatives: cellulose; Modified cellulose
C08B 1/003
Preparatory treatment of cellulose for making derivatives thereof , e.g. pre-treatment, pre-soaking, activation: preparation of cellulose…
C08H 8/00
Macromolecular compounds derived from lignocellulosic materials
C12P 19/02
Preparation of compounds containing saccharide radicals: monosaccharides

Cellulose solution manufacturing method, cellulose precipitate manufacturing method, cellulose saccharification method, cellulose solution, and cellulose precipitate

Life of this patent

Cellulose solution manufacturing method, cellulose precipitate manufacturing method, cellulose saccharification method, cellulose solution, and cellulose precipitate

Life of this patent

Abstract

Claims9