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. 16, 1997
Filed:
Nov. 20, 1995
Applicant:
Inventors:
Assignee:
Nippon Shokubai Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
568862 ; 568458 ;
Abstract
A process of producing hydroxyalkanal comprises a step of hydrating a raw material, namely, an unsaturated aldehyde, in an aqueous solution in the presence of a lead-carrying heterogeneous acid catalyst promoting the hydration reaction. According to the above method, the lead-carrying heterogeneous acid catalyst curbs the consecutive reaction of the reaction product, namely, hydroxyalkanal. Thus, hydroxyalkanal can be produced with high selectivity at high yield out of a high-concentration unsaturated aldehyde solution. Moreover, the catalyst can be used repetitively for a considerable period of continuous use in a stable manner, thereby further improving the yield of hydroxyalkanal.