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AU9441698A - Method for activating polysaccharides - Google Patents

Method for activating polysaccharides

Info

Publication number
AU9441698A
AU9441698A AU94416/98A AU9441698A AU9441698A AU 9441698 A AU9441698 A AU 9441698A AU 94416/98 A AU94416/98 A AU 94416/98A AU 9441698 A AU9441698 A AU 9441698A AU 9441698 A AU9441698 A AU 9441698A
Authority
AU
Australia
Prior art keywords
polysaccharide
liquid ammonia
ammonia
inclusion agent
contact
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.)
Abandoned
Application number
AU94416/98A
Inventor
Ties Karstens
Armin Stein
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.)
Cerdia Produktions GmbH
Original Assignee
Rhodia Acetow GmbH
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 Rhodia Acetow GmbH filed Critical Rhodia Acetow GmbH
Publication of AU9441698A publication Critical patent/AU9441698A/en
Abandoned 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

Landscapes

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

Abstract

The invention relates to a method for activating a polysaccharide by bringing the polysaccharide into contact with liquid ammonia. According to said method, the polysaccharide is brought into contact with the liquid ammonia in the presence of an inclusion agent which is soluble or dispersible in liquid ammonia and the volume available to the polysaccharide/inclusion agent/liquid ammonia system is increased explosively by reducing the pressure by at least 5 bar. Urea cannot be used as the inclusion agent if the polysaccharide is cellulose. The product of the method retains a high level of activation, remains highly accessible to reagents and remains highly reactive for a long time without a residual quantity of ammonia which would be undesirable for subsequent applications being necessary or without the residual quantity of ammonia having to be subsequently replaced with an inclusion agent.
AU94416/98A 1997-09-26 1998-09-23 Method for activating polysaccharides Abandoned AU9441698A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19742692 1997-09-26
DE19742692A DE19742692A1 (en) 1997-09-26 1997-09-26 Process for the activation of polysaccharides
PCT/EP1998/006072 WO1999016793A1 (en) 1997-09-26 1998-09-23 Method for activating polysaccharides

Publications (1)

Publication Number Publication Date
AU9441698A true AU9441698A (en) 1999-04-23

Family

ID=7843820

Family Applications (1)

Application Number Title Priority Date Filing Date
AU94416/98A Abandoned AU9441698A (en) 1997-09-26 1998-09-23 Method for activating polysaccharides

Country Status (5)

Country Link
EP (1) EP1023325B1 (en)
AT (1) ATE237642T1 (en)
AU (1) AU9441698A (en)
DE (2) DE19742692A1 (en)
WO (1) WO1999016793A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19921755A1 (en) * 1999-05-11 2000-11-16 Rhodia Acetow Ag Process for the preparation of a spinning solution of cellulose in N-methylmorpholine-N-oxide monohydrate, the solutions obtainable therewith and the regenerated cellulose fibers obtainable therefrom by spinning
KR100364508B1 (en) * 2000-09-21 2002-12-12 (주)이앤텍 Bio-polymer amine and manufact uring method of same
CN104292342A (en) † 2006-06-14 2015-01-21 塞皮制造（Pty）有限公司 Method for preparing alkali cellulose

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3511591A (en) * 1965-04-09 1970-05-12 Deering Milliken Res Corp Process and product of rendering cellulosic fabrics amenable to molding operations
FI62318C (en) * 1981-01-27 1982-12-10 Neste Oy FORM OF CELLULOSE DERIVATIVES OF FRAMSTAELLNING AV ETT ALKALILOESLIGT
US5037663A (en) * 1981-10-14 1991-08-06 Colorado State University Research Foundation Process for increasing the reactivity of cellulose-containing materials
US4600590A (en) * 1981-10-14 1986-07-15 Colorado State University Research Foundation Method for increasing the reactivity and digestibility of cellulose with ammonia
DE4329937C1 (en) * 1993-09-04 1994-11-24 Rhodia Ag Rhone Poulenc Process for the treatment of cellulose to activate it for subsequent chemical reactions
BR9607992A (en) * 1995-03-25 1999-11-30 Rhodia Ag Rhone Poulenc Process for activating polysaccharides, blown polysaccharide in the form of crystalline cellulose and application of cellulose
DE19628277C2 (en) * 1996-07-12 1998-07-09 Rhodia Ag Rhone Poulenc Process for activating a cellulose and urea-containing mixture, activated cellulose and urea-containing mixture and use of the activated mixture for the production of cellulose carbamate

Also Published As

Publication number Publication date
ATE237642T1 (en) 2003-05-15
EP1023325B1 (en) 2003-04-16
DE19742692A1 (en) 1999-04-01
WO1999016793A1 (en) 1999-04-08
EP1023325A1 (en) 2000-08-02
DE59807990D1 (en) 2003-05-22

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Legal Events

Date Code Title Description
MK6 Application lapsed section 142(2)(f)/reg. 8.3(3) - pct applic. not entering national phase