GB377795A - Improvements in the manufacture and production of cellulose compounds - Google Patents

Improvements in the manufacture and production of cellulose compounds

Info

Publication number
GB377795A
GB377795A GB1863631A GB1863631A GB377795A GB 377795 A GB377795 A GB 377795A GB 1863631 A GB1863631 A GB 1863631A GB 1863631 A GB1863631 A GB 1863631A GB 377795 A GB377795 A GB 377795A
Authority
GB
United Kingdom
Prior art keywords
acid
sulphuric acid
treated
per cent
organic
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
GB1863631A
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.)
Akzo Nobel UK PLC
Original Assignee
Courtaulds PLC
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 Courtaulds PLC filed Critical Courtaulds PLC
Priority to GB1863631A priority Critical patent/GB377795A/en
Publication of GB377795A publication Critical patent/GB377795A/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

Abstract

Cellulose is treated with strong sulphuric acid solution containing 60 per cent or more of sulphuric acid in the presence of a neutral inert organic liquid which is miscible with the sulphuric acid employed, e.g. methyl acetate, ethyl acetate, or amyl acetate, and the cellulose sulphate produced is separated and treated with an organic acid until the sulphuric acid radicle is replaced by the organic acid radicle. The organic liquid may be mixed with a second organic liquid, e.g. benzene, which itself is not miscible with the sulphuric acid. The process may be applied to the treatment of cellulose esters containing a small proportion of organic radicle. The following examples are given: (1) cotton is treated firstly with 84 per cent sulphuric acid in presence of ethyl acetate, and then with glacial acetic acid. (2) Sulphite pulp is treated as in (1) but using 90 per cent sulphuric acid. (3) Sulphite pulp is treated with 84 per cent sulphuric acid and ethyl acetate, separated, and acted upon with oleic acid. (4) Wood pulp is treated firstly with 84 per cent sulphuric acid and amyl acetate, and then with glacial acetic acid. The product is reacted with 98 per cent sulphuric acid in the presence of amyl acetate and benzene, separated, and finally treated with acetic acid. (5) Cotton linters are treated with a mixture comprising 90 per cent sulphuric acid, amyl acetate, and benzene, filtered off, and reacted with acetic acid. The Provisional Specification mentions also stearic acid as a suitable organic acid.
GB1863631A 1931-06-27 1931-06-27 Improvements in the manufacture and production of cellulose compounds Expired GB377795A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1863631A GB377795A (en) 1931-06-27 1931-06-27 Improvements in the manufacture and production of cellulose compounds

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1863631A GB377795A (en) 1931-06-27 1931-06-27 Improvements in the manufacture and production of cellulose compounds

Publications (1)

Publication Number Publication Date
GB377795A true GB377795A (en) 1932-08-04

Family

ID=10115847

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1863631A Expired GB377795A (en) 1931-06-27 1931-06-27 Improvements in the manufacture and production of cellulose compounds

Country Status (1)

Country Link
GB (1) GB377795A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2539451A (en) * 1948-02-27 1951-01-30 Eastman Kodak Co Method of preparing sulfuric acid esters of cellulose
US2714591A (en) * 1951-09-08 1955-08-02 Hercules Powder Co Ltd Cellulose sulfate preparation

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2539451A (en) * 1948-02-27 1951-01-30 Eastman Kodak Co Method of preparing sulfuric acid esters of cellulose
US2714591A (en) * 1951-09-08 1955-08-02 Hercules Powder Co Ltd Cellulose sulfate preparation

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