The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 06, 1976
Filed:
Mar. 14, 1974
Applicant:
Inventors:
Brian Keith Howe, St. Albans, EN;
Francis Robert Hardy, Luton, EN;
Douglas Alfred Clarke, Luton, EN;
Assignee:
Laporte Industries Limited, London, EN;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
260596 ; 2606 / ; 252476 ; 2605 / ;
Abstract
In the oxidation of .alpha., .beta.-diols to .alpha., .beta.-diones with oxygen, the use of a catalyst comprising at least one metal selected from Cu, Ag and Au and at least one element selected from Ge, Sn, Pb, N, P, As, Sb, Bi. In the oxidation of ethylene glycol to glyoxal with oxygen, condensing ethylene glycol from the products from the reactor and thereafter lowering the temperature to condense the glyoxal. A purification process for glyoxal uses a weakly basic anion exchange resin.