GB226142A - Process for the purification or dehydration of cellullose esters and ethers used alone or in admixture with organic or inorganic substances - Google Patents

Process for the purification or dehydration of cellullose esters and ethers used alone or in admixture with organic or inorganic substances

Info

Publication number
GB226142A
GB226142A GB7086/24A GB708624A GB226142A GB 226142 A GB226142 A GB 226142A GB 7086/24 A GB7086/24 A GB 7086/24A GB 708624 A GB708624 A GB 708624A GB 226142 A GB226142 A GB 226142A
Authority
GB
United Kingdom
Prior art keywords
esters
purification
alcohol
absolute alcohol
nitrocellulose
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
GB7086/24A
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
Publication of GB226142A publication Critical patent/GB226142A/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

Abstract

Cellulose esters and ethers, particularly nitrocellulose and acetylcellulose are treated with absolute alcohol for the purpose of removing water absorbed in the ester or ether, or for its purification, the alcohol extracting, particularly in the case of nitrocellulose, the lower esters. The product that remains is more homogeneous, has an improved stability, is free from water, and is suitable for the manufacture of artificial silk, plates, films, smokeless powders and dynamites, and for such uses the product may be mixed with other organic or inorganic substances. Solutions of the purified products when applied to metal surfaces show no coloration. From the solution obtained in the preliminary extraction, the lower esters may be precipitated by water and these esters may be worked up into spinning solutions, varnishes, &c. Absolute alcohol may also be used in the preparation of solutions of nitrocellulose or acetylcellulose to be used for spinning artificial silk.ALSO:The Specification as open to inspection under Sect. 91 (3) (a) refers to the addition of absolute alcohol during the etherification of alcohols and the esterification of alcohol for the purpose of dissolving, and so removing from the sphere of action, the by-products such as ethyl sulphates and mono esters that are formed during the reaction. By such removal, the speed of the reaction is increased, the yield improved, and it is possible to reduce the proportion of dehydrating-agent. This subject-matter does not appear in the Specification as accepted.ALSO:The Specification as open to inspection under Sect. 91 (3) (a) refers to the purification of edible fats by extraction with absolute alcohol. This subject-matter does not appear in the Specification as accepted.
GB7086/24A 1923-12-15 1924-03-19 Process for the purification or dehydration of cellullose esters and ethers used alone or in admixture with organic or inorganic substances Expired GB226142A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT226142X 1923-12-15

Publications (1)

Publication Number Publication Date
GB226142A true GB226142A (en) 1925-06-19

Family

ID=3669884

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7086/24A Expired GB226142A (en) 1923-12-15 1924-03-19 Process for the purification or dehydration of cellullose esters and ethers used alone or in admixture with organic or inorganic substances

Country Status (1)

Country Link
GB (1) GB226142A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE767498C (en) * 1935-02-25 1952-09-08 Gevaert Photo Prod Nv Process for the stabilization of organic cellulose esters

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE767498C (en) * 1935-02-25 1952-09-08 Gevaert Photo Prod Nv Process for the stabilization of organic cellulose esters

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