GB516740A - Manufacture of glyoxal - Google Patents

Manufacture of glyoxal

Info

Publication number
GB516740A
GB516740A GB2001238A GB2001238A GB516740A GB 516740 A GB516740 A GB 516740A GB 2001238 A GB2001238 A GB 2001238A GB 2001238 A GB2001238 A GB 2001238A GB 516740 A GB516740 A GB 516740A
Authority
GB
United Kingdom
Prior art keywords
acid
glyoxal
alcohol
acetic acid
manufacture
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
GB2001238A
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 GB2001238A priority Critical patent/GB516740A/en
Publication of GB516740A publication Critical patent/GB516740A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
    • C07C45/51—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by pyrolysis, rearrangement or decomposition
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
    • C07C45/51—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by pyrolysis, rearrangement or decomposition
    • C07C45/54—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by pyrolysis, rearrangement or decomposition of compounds containing doubly bound oxygen atoms, e.g. esters

Abstract

516,740. Glyoxal. GROVES, W. W. (I. G. Farbenindustrie Akt.-Ges.). July 6, 1938, No. 20012.. [Class 2 (iii)] Glyoxal is prepared by heating glyoxal tetiacetate with at least four molecular proportions of an aliphatic monohydric alcohol, especially an alcohol containing at most three carbon atoms, such as methanol, ethanol, propanol or isopropanol, in the presence of water and of an acid stronger than acetic acid, e.g. sulphuric acid, hydrochloric acid, phosphoric acid, benzene-sulphonic acid, oxalic acid or tartaric acid. The glyoxal tetracetate is converted into the tetracetal which is saponified, the acetic acid formed being esterified with the alcohol ; the ester and excess alcohol (if any) are then removed by distillation. Examples are given.
GB2001238A 1938-07-06 1938-07-06 Manufacture of glyoxal Expired GB516740A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2001238A GB516740A (en) 1938-07-06 1938-07-06 Manufacture of glyoxal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2001238A GB516740A (en) 1938-07-06 1938-07-06 Manufacture of glyoxal

Publications (1)

Publication Number Publication Date
GB516740A true GB516740A (en) 1940-01-10

Family

ID=10138885

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2001238A Expired GB516740A (en) 1938-07-06 1938-07-06 Manufacture of glyoxal

Country Status (1)

Country Link
GB (1) GB516740A (en)

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