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:
Dec. 04, 1984
Filed:
Feb. 21, 1984
Applicant:
Inventors:
Werner Krause, Hurth, DE;
Werner Pieper, Erftstadt, DE;
Assignee:
Hoechst Aktiengesellschaft, , DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07F / ;
U.S. Cl.
CPC ...
2605 / ; 2605 / ;
Abstract
The disclosure relates to process for making derivatives of vinylphosphonic acid or vinylpyrophosphonic acid. To this end, a ketone is reacted with tetraphosphorus hexoxide in the presence of catalytic proportions of a proton-yielding substance. In the event of the products desired to be produced being vinylphosphonic acid derivatives, the vinylpyrophosphonic acid derivatives first obtained are hydrolyzed with an equivalent quantity of water.