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1. WO2014105997 - PROCESS FOR PRODUCING PURIFIED CELLULOSE

Publication Number WO/2014/105997
Publication Date 03.07.2014
International Application No. PCT/US2013/077897
International Filing Date 27.12.2013
IPC
D21C 3/06 2006.1
DTEXTILES; PAPER
21PAPER-MAKING; PRODUCTION OF CELLULOSE
CPRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE- CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
3Pulping cellulose-containing materials
04with acids, acid salts, or acid anhydrides
06sulfur dioxide; sulfurous acid; bisulfites
D21C 3/22 2006.1
DTEXTILES; PAPER
21PAPER-MAKING; PRODUCTION OF CELLULOSE
CPRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE- CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
3Pulping cellulose-containing materials
22Other features of pulping processes
D21C 3/20 2006.1
DTEXTILES; PAPER
21PAPER-MAKING; PRODUCTION OF CELLULOSE
CPRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE- CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
3Pulping cellulose-containing materials
20with organic solvents
D21C 9/10 2006.1
DTEXTILES; PAPER
21PAPER-MAKING; PRODUCTION OF CELLULOSE
CPRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE- CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
9After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters
10Bleaching
C08B 37/14 2006.1
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
BPOLYSACCHARIDES; DERIVATIVES THEREOF
37Preparation of polysaccharides not provided for in groups C08B1/-C08B35/110; Derivatives thereof
14Hemicellulose; Derivatives thereof
C08B 1/00 2006.1
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
BPOLYSACCHARIDES; DERIVATIVES THEREOF
1Preparatory treatment of cellulose for making derivatives thereof
CPC
C08B 37/0057
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
BPOLYSACCHARIDES; DERIVATIVES THEREOF
37Preparation of polysaccharides not provided for in groups C08B1/00 - C08B35/00; Derivatives thereof
0006Homoglycans, i.e. polysaccharides having a main chain consisting of one single sugar, e.g. colominic acid
0057beta-D-Xylans, i.e. xylosaccharide, e.g. arabinoxylan, arabinofuronan, pentosans; (beta-1,3)(beta-1,4)-D-Xylans, e.g. rhodymenans; Hemicellulose; Derivatives thereof
C08H 8/00
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
HDERIVATIVES OF NATURAL MACROMOLECULAR COMPOUNDS
8Macromolecular compounds derived from lignocellulosic materials
C13K 1/02
CCHEMISTRY; METALLURGY
13SUGAR INDUSTRY
KSACCHARIDES OBTAINED FROM NATURAL SOURCES OR BY HYDROLYSIS OF NATURALLY OCCURRING DISACCHARIDES, OLIGOSACCHARIDES OR POLYSACCHARIDES
1Glucose
02obtained by saccharification of cellulosic materials
Applicants
  • API INTELLECTUAL PROPERTY HOLDINGS, LLC [US]/[US]
Inventors
  • RETSINA, Theodora
  • PYLKKANEN, Vesa
  • O'CONNOR, Ryan
Agents
  • O'CONNOR, Ryan
Priority Data
14/141,41526.12.2013US
61/747,40831.12.2012US
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) PROCESS FOR PRODUCING PURIFIED CELLULOSE
(FR) PROCÉDÉS DE FABRICATION DE CELLULOSE PURIFIÉE
Abstract
(EN) In some variations, the invention provides a process for producing purified cellulose, comprising: providing a feedstock comprising lignocellulosic biomass; contacting the feedstock with sulfur dioxide, water, and a solvent for lignin, to produce intermediate solids and a liquid phase comprising hemicelluloses and lignin; mildly bleaching the intermediate solids to further delignify the intermediate solids, thereby generating cellulose-rich solids; and washing the cellulose-rich solids to generate purified cellulose with less than 2 weight percent lignin. The bleaching may employ bleaching agents including lignin-modifying enzymes. The bleaching and washing steps may be combined. It is also possible to carry out bleaching prior to, or simultaneously with, biomass fractionation in the digestor, which may help reduce downstream lignin precipitation. The purified cellulose may be utilized for making cellulose materials or cellulose derivatives, or for hydrolysis to produce glucose.
(FR) Dans certaines variations, l'invention concerne un procédé de production de cellulose purifiée, consistant à prendre une charge d'alimentation contenant une biomasse lignocellulosique, à mettre en contact la charge d'alimentation avec du dioxyde de soufre, de l'eau et un solvant pour la lignine, afin de produire des matières solides intermédiaires et une phase liquide comprenant des hémicelluloses et de la lignine, à blanchir de façon douce les matières solides intermédiaires de façon à encore délignifier les matières solides intermédiaires, ce qui permet de générer des matières solides riches en cellulose, et à laver les matières solides riches en cellulose pour générer de la cellulose purifiée ayant moins de 2 pour cent en poids de lignine. Le blanchiment peut utiliser des agents de blanchiment comprenant des enzymes de modification de la lignine. Les étapes de blanchiment et de lavage peuvent être combinées. Il est également possible d'effectuer le blanchiment avant, ou simultanément avec le fractionnement de la biomasse dans le digesteur ce qui peut aider à réduire la précipitation de lignine en aval. La cellulose purifiée peut être utilisée pour fabriquer des matières de cellulose ou des dérivés de cellulose, ou pour hydrolyse afin de produire du glucose.
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