Method for treating cellulose-containing biomass

Patent metadata

Field	Value
Publication number	US-2016243782-A1
Application number	US-201415027599-A
Country	US
Kind code	A1
Filing date	Sep 9, 2014
Priority date	Oct 7, 2013
Publication date	Aug 25, 2016
Grant date	—

Abstract

A treatment method for biomass which is a pretreatment method including continuously performing hydrothermal treatment using a screw extruder to produce a biomass composition for saccharification from cellulose-containing biomass serving as a raw material with a small amount of electricity. The treatment method sequentially includes: pulverizing, in a pulverization section of the screw extruder, the cellulose-containing biomass so as to have a maximum grain size of 1,000 μm or less and adjusting a water content ratio thereof to from 30% to 80%; performing, in a heating section of the screw extruder, hydrothermal treatment at a temperature of from 205° C. to 250° C. for 0.1 minute to 10 minutes while performing kneading pulverization having a grinding effect; and cooling, in a cooling section of the screw extruder downstream of the heating section, a treated product to 100° C. or less to recover the treated product.

First claim

1 . A treatment method for biomass, which is a pretreatment method comprising continuously performing hydrothermal treatment through use of a screw extruder to produce a biomass composition for saccharification from cellulose-containing biomass serving as a raw material with a small amount of electricity,
the treatment method sequentially comprising: pulverizing, in a pulverization section of the screw extruder, the cellulose-containing biomass serving as a raw material so as to have a maximum grain size of 1,000 μm or less and adjusting a water content ratio thereof to from 30% to 80%; performing, in a heating section of the screw extruder, hydrothermal treatment at a temperature of from 205° C. to 250° C. for 0.1 minute to 10 minutes while performing kneading pulverization having a grinding effect; and cooling, in a cooling section of the screw extruder downstream of the heating section, a treated product to 100° C. or less to recover the treated product.

2 . The treatment method for biomass as claimed in claim 1 , in which, in the heating section, the kneading pulverization having a grinding effect is performed concurrently with the hydrothermal treatment by arranging an element including a seal ring and at least one set of a kneading disc and/or a left-hand screw arranged immediately upstream of the seal ring.

3 . The treatment method for biomass as claimed in claim 1 , in which, in the cooling section downstream of the heating section, the cooling is performed by installing a water cooling jacket and/or a liquid feed line.

4 . The treatment method for biomass as claimed in claim 1 , in which the screw extruder is a co-rotating twin-screw extruder.

5 . The treatment method for biomass as claimed in claim 1 , in which the cellulose-containing biomass is soft biomass.

6 . A production method for a biomass composition for saccharification, comprising conducting the treatment method as claimed in claim 1 .

7 . A production method for a sugar, comprising hydrolyzing a biomass composition obtained by the production method as claimed in claim 6 .

Assignees

• Showa Denko Kk

Inventors

• Fujita Ichiro
• Yamaki Shinji
• Yoneda Tadashi

Classifications

• B30B11/24

  using screws or worms · CPC title

• C12P2203/00

  Fermentation products obtained from optionally pretreated or hydrolyzed cellulosic or lignocellulosic material as the carbon source · CPC title

• B02C19/22

  Crushing mills with screw-shaped crushing means · CPC title

• C12P19/02

  Monosaccharides (2-ketogulonic acid C12P7/60) · CPC title

• C12P19/14

  produced by the action of a carbohydrase {(EC 3.2.x)}, e.g. by alpha-amylase {, e.g. by cellulase, hemicellulase} · CPC title