Method of manufacturing filter aid

Patent metadata

Field	Value
Publication number	US-9963728-B2
Application number	US-201214235985-A
Country	US
Kind code	B2
Filing date	Jul 27, 2012
Priority date	Jul 29, 2011
Publication date	May 8, 2018
Grant date	May 8, 2018

Abstract

A method of producing a filter aid includes: (A) obtaining a pretreated biomass by pulverization treatment and/or thermochemical treatment of a cellulose-containing biomass; (B) treating the pretreated biomass obtained in (A) with cellulase to obtain a cellulase-treated product; and (C) obtaining a solid content of the cellulase-treated product of (B).

First claim

The invention claimed is:

1. A filtration method comprising filtering a high turbidity liquid containing a lignin component together with a filter aid obtained by the method of producing a filter aid comprising:
(A) obtaining a pretreated biomass by thermochemical treatment, which is at least one selected from the group consisting of acid treatment, alkali treatment, ammonia treatment, steam explosion treatment and hydrothermal treatment, of a cellulose-containing biomass;
(B) treating said pretreated biomass obtained in (A) with cellulase to obtain a cellulase-treated product; and
(C) obtaining a solid content of said cellulase-treated product of (B), wherein said cellulose-containing biomass is a herbaceous biomass, wherein the turbidity of said high turbidity liquid is not less than 1000 NTU.

2. The method according to claim 1 , wherein said filtering is conducted by filter press.

3. The filtration method according to claim 1 , wherein an amount of dry product of said filter aid is not less than 0.5% by mass and less than 25% by mass with respect to the liquid to be filtered.

Assignees

• Minamino Atsushi
• Kurihara Hiroyuki
• Yamada Katsushige
• Kishimoto Junpei
• Toray Industries

Inventors

• Minamino Atsushi
• Kurihara Hiroyuki
• Yamada Katsushige
• Kishimoto Junpei

Classifications

• C08B37/0057

  beta-D-Xylans, i.e. xylosaccharide, e.g. arabinoxylan, arabinofuronan, pentosans; (beta-1,3)(beta-1,4)-D-Xylans, e.g. rhodymenans; Hemicellulose; Derivatives thereof · CPC title

• C08L5/14

  Hemicellulose; Derivatives thereof · CPC title

• B01J20/28038

  Membranes or mats made from fibers or filaments · CPC title

• B01J2220/4831

  having been subjected to further processing, e.g. paper, cellulose pulp · CPC title

• B01D61/04

  Feed pretreatment · CPC title