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:
Feb. 05, 1991
Filed:
Jul. 27, 1987
Applicant:
Inventors:
Gary P Hagen, Glen Ellyn, IL (US);
Ruth A Montag, Naperville, IL (US);
Assignee:
Amoco Corporation, Chicago, IL (US);
Primary Examiner:
Int. Cl.
CPC ...
C07C / ; C07C / ; C07C / ; C07C / ; C07C / ;
U.S. Cl.
CPC ...
562599 ; 2604055 ; 562400 ; 562405 ; 562495 ; 562503 ; 562504 ; 562510 ;
Abstract
Catalyst and process are disclosed for the improved preparation of alpha, beta-unsaturated acids. The catalyst comprises a porous silica gel component and a Group IA alkali metal component, which is present in an amount of from 200 to 20,000 parts per million and optionally another component such as tin (IV) oxide, and mixtures thereof. The process comprises reacting formaldehyde and an aliphatic carboxylic acid in the presence of said catalyst while maintaining catalyst activity and selectivity during the process by addition of a source of the alkali metal component.