GB2018259A - Making cellulose solutions - Google Patents

Making cellulose solutions

Info

Publication number
GB2018259A
GB2018259A GB7911288A GB7911288A GB2018259A GB 2018259 A GB2018259 A GB 2018259A GB 7911288 A GB7911288 A GB 7911288A GB 7911288 A GB7911288 A GB 7911288A GB 2018259 A GB2018259 A GB 2018259A
Authority
GB
United Kingdom
Prior art keywords
cellulose
solvent
paraformaldehyde
anhydroglucosidic
units per
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.)
Granted
Application number
GB7911288A
Other versions
GB2018259B (en
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.)
SNIA Viscosa SpA
Original Assignee
SNIA Viscosa SpA
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
Priority claimed from IT7821922A external-priority patent/IT7821922A0/en
Priority claimed from IT7828527A external-priority patent/IT7828527A0/en
Application filed by SNIA Viscosa SpA filed Critical SNIA Viscosa SpA
Publication of GB2018259A publication Critical patent/GB2018259A/en
Application granted granted Critical
Publication of GB2018259B publication Critical patent/GB2018259B/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
    • C08B16/00—Regeneration of cellulose
    • 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
    • C08B1/003—Preparation of cellulose solutions, i.e. dopes, with different possible solvents, e.g. ionic liquids

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)
  • Artificial Filaments (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)

Abstract

A process for the dissolution of cellulose in organic solvents such as dimethylformamide, dimethylacetamide, and N-methylpyrrolidone comprises contacting the cellulose with an excess of paraformaldehyde and with the solvent at elevated temperatures, preferably higher than 115 DEG C. The amount of paraformaldehyde used preferably corresponds to at least 13 CH3O units per anhydroglucosidic unit of the cellulose. The solution obtained can be rendered stable at room temperature by heating it under stirring to lower the paraformaldehyde content, preferably to not less than 8 CH2O units per anhydroglucosidic unit. Formed bodies of regenerated cellulose can be obtained from said solutions by coagulating them in an aqueous bath, which may be alkaline or may be a mixture of water and the solvent of the solution, or even by evaporating the solvent.
GB7911288A 1978-04-03 1979-03-30 Making cellulose solutions Expired GB2018259B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT7821922A IT7821922A0 (en) 1978-04-03 1978-04-03 PROCEDURE FOR THE DISSOLUTION OF CELLULOSE IN ORGANIC SOLVENTS, SOLUTIONS OBTAINED WITH THIS PROCEDURE, AND PROCEDURE FOR THE REGENERATION OF CELLULOSE FROM THE SAID SOLUTIONS WITH THE PRODUCTION OF FORMED BODIES.
IT7828527A IT7828527A0 (en) 1978-10-06 1978-10-06 IMPROVEMENT OF THE PROCEDURE FOR THE DISSOLUTION OF CELLULOSE IN ORGANIC SOLVENTS.

Publications (2)

Publication Number Publication Date
GB2018259A true GB2018259A (en) 1979-10-17
GB2018259B GB2018259B (en) 1982-11-10

Family

ID=26328043

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7911288A Expired GB2018259B (en) 1978-04-03 1979-03-30 Making cellulose solutions

Country Status (4)

Country Link
JP (1) JPS54151613A (en)
DE (1) DE2913369A1 (en)
FR (2) FR2432534A1 (en)
GB (1) GB2018259B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT7826175A0 (en) * 1978-07-27 1978-07-27 Snia Viscosa PROCEDURE FOR THE PREPARATION OF BODIES OF REGENERATED CELLULOSE FROM SOLUTIONS OF CELLULOSE DERIVATIVES IN ORGANIC SOLVENTS.
IT7826174A0 (en) * 1978-07-27 1978-07-27 Snia Viscosa PROCEDURE FOR THE PREPARATION OF BODIES OF REGENERATED CELLULOSE FROM SOLUTIONS OF CELLULOSE DERIVATIVES IN DIMETHYL SULPHOXIDE.
KR20230084279A (en) * 2021-01-04 2023-06-12 아사히 가세이 가부시키가이샤 Manufacturing method of cellulose fibers

Also Published As

Publication number Publication date
JPS54151613A (en) 1979-11-29
FR2431517A1 (en) 1980-02-15
GB2018259B (en) 1982-11-10
FR2432534A1 (en) 1980-02-29
DE2913369A1 (en) 1979-10-11

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee