GB237567A - Improvements in the process for the preliminary treatment of cellulose prior to esterification - Google Patents

Improvements in the process for the preliminary treatment of cellulose prior to esterification

Info

Publication number
GB237567A
GB237567A GB14708/25A GB1470825A GB237567A GB 237567 A GB237567 A GB 237567A GB 14708/25 A GB14708/25 A GB 14708/25A GB 1470825 A GB1470825 A GB 1470825A GB 237567 A GB237567 A GB 237567A
Authority
GB
United Kingdom
Prior art keywords
cellulose
acetic acid
acid
temperature
per cent
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
GB14708/25A
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.)
Chimique des Usines du Rhone
Original Assignee
Chimique des Usines du Rhone
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 Chimique des Usines du Rhone filed Critical Chimique des Usines du Rhone
Publication of GB237567A publication Critical patent/GB237567A/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
    • 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
    • C08B1/02—Rendering cellulose suitable for esterification

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)
  • Chemical Or Physical Treatment Of Fibers (AREA)

Abstract

The esterification of cellulose is facilitated by a preliminary treatment of the cellulose with a small amount of acetic acid such that there is formed with the moisture, present in the cellulose an acid of 60-90 per cent strength preferably of 70-85 per cent strength. The treatment is applicable to celluloses that have been treated with alkaline liquors, such as mercerized cellulose, or wood cellulose extracted by the soda process, or cellulose that has bleached by alkaline bleaching-agents. The cellulose moistened with acid is either stirred or allowed to stand; a temperature below 30 DEG C. is adequate. In examples mercerized cotton is gently stirred with 11 per cent of its weight of acetic acid for 2 hours, then treated with an excess of acetic acid containing 0.5 per cent sulphuric acid at 45 DEG C., and subsequently acetic anhydride added and the temperature maintained at 50-60 DEG C.; wood paste purified by treatment with strong caustic soda solution, is moistened with one fifth of its weight of acetic acid and allowed to stand for 20 hours, then dipped into a mixture of acetic acid and acetic anhydride, and sulphuric acid added, the temperature being allowed to rise to 60 DEG C.; one part of cotton which has been bleached by sodium hypochlorite, is moistened with 0.17 parts of acetic acid and gently stirred for 2 hours, after which an excess of acetic acid is added, and subsequently a mixture of acetic anhydride and sulphuric acid, the temperature being maintained at 20 DEG C., and finally a further quantity of acetic anhydride, after which the temperature is raised to 55 DEG C.
GB14708/25A 1924-07-28 1925-06-05 Improvements in the process for the preliminary treatment of cellulose prior to esterification Expired GB237567A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR237567X 1924-07-28

Publications (1)

Publication Number Publication Date
GB237567A true GB237567A (en) 1925-11-26

Family

ID=8882961

Family Applications (1)

Application Number Title Priority Date Filing Date
GB14708/25A Expired GB237567A (en) 1924-07-28 1925-06-05 Improvements in the process for the preliminary treatment of cellulose prior to esterification

Country Status (1)

Country Link
GB (1) GB237567A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4336370A (en) * 1980-03-24 1982-06-22 International Paper Company Process for activating cellulose pulp to improve ease of esterification

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4336370A (en) * 1980-03-24 1982-06-22 International Paper Company Process for activating cellulose pulp to improve ease of esterification

Similar Documents

Publication Publication Date Title
GB427626A (en) Improvements in or relating to the manufacture of cellulose
GB237567A (en) Improvements in the process for the preliminary treatment of cellulose prior to esterification
GB188992A (en) A method of preparing solutions of starch
GB563209A (en) Improvements in or relating to the stabilization of polyvinyl alcohol
GB237685A (en) Improvements in, or relating to, the preparation of alkali celluloses
GB235635A (en) Improvements in and relating to the manufacture of glue, gelatine and meal from fish and other offal of marine origin
GB303493A (en) Process for the preparation of sulphuric esters of cellulose
NL32365C (en)
GB594835A (en) Method for the preparation of wood pulp
GB538023A (en) Improvements in the preparation of cellulose from wood and other lignocellulosic materials
GB288997A (en) Process for the production of an improved cellulose
GB348292A (en) Improved process for the manufacture of cellulose acetates
GB377795A (en) Improvements in the manufacture and production of cellulose compounds
GB463056A (en) Improvements in or relating to the production of alkali cellulose particularly useful for making cellulose esters or ethers
GB193926A (en) Improvements in or relating to the manufacture of artificial silk and the like
GB380822A (en) Manufacture of cellulose esters
GB468993A (en) Preparation of cellulose xanthate solutions
GB343986A (en) Improvements in or relating to the production of cellulose esters and cellulose ester products therefrom
GB415329A (en) Process for stabilising cellulose esters
GB266684A (en) Process for treating acetic acid liquor
GB345235A (en) Improvements in process of making cellulose acetate
GB203301A (en) Improved manufacture of white lead
GB167864A (en) An improved process for producing wool-like or transparent effects on cotton fabrics
GB317855A (en) Manufacture of artificial silk
GB467160A (en) Improvement in high viscosity organic esters of cellulose and process of preparing them