GB497963A - Improvements in or relating to the manufacture of cellulose derivatives and other colloidal substances - Google Patents

Improvements in or relating to the manufacture of cellulose derivatives and other colloidal substances

Info

Publication number
GB497963A
GB497963A GB1831737A GB1831737A GB497963A GB 497963 A GB497963 A GB 497963A GB 1831737 A GB1831737 A GB 1831737A GB 1831737 A GB1831737 A GB 1831737A GB 497963 A GB497963 A GB 497963A
Authority
GB
United Kingdom
Prior art keywords
solution
orifices
precipitating liquid
colloidal substances
cellulose derivatives
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
GB1831737A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB1831737A priority Critical patent/GB497963A/en
Publication of GB497963A publication Critical patent/GB497963A/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
    • C08B3/00—Preparation of cellulose esters of organic acids
    • C08B3/22—Post-esterification treatments, including purification
    • C08B3/26—Isolation of the cellulose ester
    • C08B3/28—Isolation of the cellulose ester by precipitation

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

<PICT:0497963/IV/1> Colloidal substances, e.g. cellulose derivatives, rubber, polymerized vinyl esters, polymerized acrylic esters, bituminous materials, and starch derivatives, are precipitated from solutions thereof, by extruding the solution through small orifices directly into a precipitating liquid in contact with the orifices and having relative motion substantially transverse to the direction of flow of the solution through the orifices. Suitable apparatus comprises a cylindrical vessel 1 for precipitating liquid provided with fixed baffles 2 and adjustable baffles 3, and a perforated rotatable vessel 4 which contains the solution of cellulose acetate or the like. A suitable precipitating liquid for an acetylation solution of cellulose acetate is a 15-30 per cent solution of acetic acid.
GB1831737A 1937-07-01 1937-07-01 Improvements in or relating to the manufacture of cellulose derivatives and other colloidal substances Expired GB497963A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1831737A GB497963A (en) 1937-07-01 1937-07-01 Improvements in or relating to the manufacture of cellulose derivatives and other colloidal substances

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1831737A GB497963A (en) 1937-07-01 1937-07-01 Improvements in or relating to the manufacture of cellulose derivatives and other colloidal substances

Publications (1)

Publication Number Publication Date
GB497963A true GB497963A (en) 1939-01-02

Family

ID=10110413

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1831737A Expired GB497963A (en) 1937-07-01 1937-07-01 Improvements in or relating to the manufacture of cellulose derivatives and other colloidal substances

Country Status (1)

Country Link
GB (1) GB497963A (en)

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