GB440075A - Improvements in or relating to the manufacture and treatment of cellulose derivatives - Google Patents

Improvements in or relating to the manufacture and treatment of cellulose derivatives

Info

Publication number
GB440075A
GB440075A GB6608/35A GB660835A GB440075A GB 440075 A GB440075 A GB 440075A GB 6608/35 A GB6608/35 A GB 6608/35A GB 660835 A GB660835 A GB 660835A GB 440075 A GB440075 A GB 440075A
Authority
GB
United Kingdom
Prior art keywords
cyanide
treatment
sodium
cellulose derivatives
relating
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
GB6608/35A
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.)
Acordis UK Ltd
Original Assignee
British Celanese 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 British Celanese Ltd filed Critical British Celanese Ltd
Publication of GB440075A publication Critical patent/GB440075A/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

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

Heavy metal compounds are removed from cellulose derivatives by causing the solid derivative and a solution of a cyanide to remain in contact for some time and thereafter washing the cellulose derivative free from cyanide. Dilute aqueous solutions of sodium, potassium, or ammonium cyanide may be used, and the treatment may be applied either before or after the usual stabilization. In an example, a charge of cellulose acetate which has been stabilized and bleached, is treated with a 0,04 per cent solution of sodium cyanide, and then washed free from cyanide. In another example, unbleached precipitated cellulose acetate is treated with a 0,04 per cent solution of sodium cyanide, washed free from cyanide, and the process repeated.
GB6608/35A 1934-03-02 1935-03-02 Improvements in or relating to the manufacture and treatment of cellulose derivatives Expired GB440075A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US440075XA 1934-03-02 1934-03-02

Publications (1)

Publication Number Publication Date
GB440075A true GB440075A (en) 1935-12-19

Family

ID=21930026

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6608/35A Expired GB440075A (en) 1934-03-02 1935-03-02 Improvements in or relating to the manufacture and treatment of cellulose derivatives

Country Status (1)

Country Link
GB (1) GB440075A (en)

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