GB1049636A - Method of manufacturing oxycellulose powder - Google Patents

Method of manufacturing oxycellulose powder

Info

Publication number
GB1049636A
GB1049636A GB334164A GB334164A GB1049636A GB 1049636 A GB1049636 A GB 1049636A GB 334164 A GB334164 A GB 334164A GB 334164 A GB334164 A GB 334164A GB 1049636 A GB1049636 A GB 1049636A
Authority
GB
United Kingdom
Prior art keywords
cellulose
oxidized
aqueous solution
water
washed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB334164A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kurashiki Rayon Co Ltd
Original Assignee
Kurashiki Rayon Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kurashiki Rayon Co Ltd filed Critical Kurashiki Rayon Co Ltd
Publication of GB1049636A publication Critical patent/GB1049636A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
    • C08B1/00—Preparatory treatment of cellulose for making derivatives thereof, e.g. pre-treatment, pre-soaking, activation
    • C08B1/08—Alkali cellulose
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
    • C08B15/00—Preparation of other cellulose derivatives or modified cellulose, e.g. complexes
    • C08B15/02—Oxycellulose; Hydrocellulose; Cellulosehydrate, e.g. microcrystalline cellulose
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
    • C08B15/00—Preparation of other cellulose derivatives or modified cellulose, e.g. complexes
    • C08B15/08—Fractionation of cellulose, e.g. separation of cellulose crystallites

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Biochemistry (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Analytical Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)

Abstract

Powdered oxycellulose is made by oxidizing a natural or a regenerated cellulose in an aqueous medium so as to introduce into the cellulose molecule from more than one atom to two hundred atoms of oxygen for every hundred anhydroglucose units. The oxidized cellulose is removed from the aqueous medium, washed with an aqueous solution of a neutralizing agent, washed with water until free from water-soluble contaminants, introduced into a volume of water to form a suspension, mechanically disintegrated while in the form of a suspension, e.g. by means of a colloid mill, and dried as by freeze-drying or spray-drying, to convert it into a fine dry powder. The oxidized cellulose may be subjected to acid hydrolysis while in the form of a dispersion prior to the mechanical disintegration step. The cellulose material may be in the form of alkali cellulose and may be oxidized by passing air through it after it has been moistened with an aqueous solution of a catalyst such as sodium sulphide, hydrogen peroxide or a manganese salt. Alternatively the cellulose material may be oxidized with an aqueous solution of an oxidizing agent such as a hypochlorite, chlorine, hydrogen peroxide, a permanganate, a chromate, a dichromate, a periodate, nitrogen peroxide or lead tetraacetate.
GB334164A 1963-02-01 1964-01-27 Method of manufacturing oxycellulose powder Expired GB1049636A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP429463 1963-02-01

Publications (1)

Publication Number Publication Date
GB1049636A true GB1049636A (en) 1966-11-30

Family

ID=11580478

Family Applications (1)

Application Number Title Priority Date Filing Date
GB334164A Expired GB1049636A (en) 1963-02-01 1964-01-27 Method of manufacturing oxycellulose powder

Country Status (2)

Country Link
DE (1) DE1468151A1 (en)
GB (1) GB1049636A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3499784A (en) * 1964-12-04 1970-03-10 Organon Process for rendering powders free flowing and the thus obtained powders
WO1998033822A1 (en) * 1997-01-30 1998-08-06 Alpenstock Holdings Limited Cellulose derivatives

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3499784A (en) * 1964-12-04 1970-03-10 Organon Process for rendering powders free flowing and the thus obtained powders
WO1998033822A1 (en) * 1997-01-30 1998-08-06 Alpenstock Holdings Limited Cellulose derivatives
GB2335921A (en) * 1997-01-30 1999-10-06 Alpenstock Holdings Ltd Cellulose derivatives
GB2335921B (en) * 1997-01-30 2000-08-02 Alpenstock Holdings Ltd Microdispersed polyanhydroglucuronic acid and salts thereof
US6372718B2 (en) 1997-01-30 2002-04-16 Alpenstock Holdings Limited Composition containing stable microdispersed polyanhydroglucuronic acids and salts thereof

Also Published As

Publication number Publication date
DE1468151A1 (en) 1968-12-19

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