GB405825A - Improvements relating to the production of cellulose acetate - Google Patents

Improvements relating to the production of cellulose acetate

Info

Publication number
GB405825A
GB405825A GB1021233A GB1021233A GB405825A GB 405825 A GB405825 A GB 405825A GB 1021233 A GB1021233 A GB 1021233A GB 1021233 A GB1021233 A GB 1021233A GB 405825 A GB405825 A GB 405825A
Authority
GB
United Kingdom
Prior art keywords
acid
cellulose
acetic
perchloric
benzene
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
GB1021233A
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 GB1021233A priority Critical patent/GB405825A/en
Publication of GB405825A publication Critical patent/GB405825A/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
    • C08B3/06—Cellulose acetate, e.g. mono-acetate, di-acetate or tri-acetate

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

Complex bodies comprising perchloric acid and another inorganic acid containing oxygen, e.g., chromic acid, phosphoric acid, sulphuric acid, or boric acid, are employed as contact substances in conjunction with acetic acid during the preliminary stage or stages in the acetylation of cellulose. In one example, the cellulose is treated in acetic acid containing 0.2 per cent of perchloric acid (on the weight of the cellulose), present as a complex body comprising perchloric acid and chromic acid, and is then removed and acetylated in a mixture of acetic anhydride and benzene. In another example, cellulose is pretreated with dilute sulphuric acid, the bulk of which is then separated off, and strong acetic acid containing 0.35 per cent of barium perchlorate is added. The liquid is then removed and the cellulose acetylated in acetic anhydride and benzene.
GB1021233A 1933-04-05 1933-04-05 Improvements relating to the production of cellulose acetate Expired GB405825A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1021233A GB405825A (en) 1933-04-05 1933-04-05 Improvements relating to the production of cellulose acetate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1021233A GB405825A (en) 1933-04-05 1933-04-05 Improvements relating to the production of cellulose acetate

Publications (1)

Publication Number Publication Date
GB405825A true GB405825A (en) 1934-02-15

Family

ID=9963648

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1021233A Expired GB405825A (en) 1933-04-05 1933-04-05 Improvements relating to the production of cellulose acetate

Country Status (1)

Country Link
GB (1) GB405825A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2429644A (en) * 1940-08-08 1947-10-28 Joseph G Denny Jr Art of esterification
US2429643A (en) * 1939-08-11 1947-10-28 Joseph G Denny Jr Art of esterification
US2429645A (en) * 1940-08-08 1947-10-28 Joseph G Denny Jr Art of esterification

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2429643A (en) * 1939-08-11 1947-10-28 Joseph G Denny Jr Art of esterification
US2429644A (en) * 1940-08-08 1947-10-28 Joseph G Denny Jr Art of esterification
US2429645A (en) * 1940-08-08 1947-10-28 Joseph G Denny Jr Art of esterification

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