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:
Nov. 29, 1988
Filed:
Sep. 18, 1987
Applicant:
Inventors:
Masakazu Sagou, Tokyo, JP;
Hideyo Fujii, Ehime, JP;
Assignee:
Sumitomo Chemical Company, Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
568487 ;
Abstract
Formaldehyde is prepared by dehydrogenating methanol in the substantial absence of oxygen and in the presence of a catalyst which is a zinc-silicon complex oxide obtained by mixing a solution containing a zinc salt of an inorganic or organic acid with a solution containing an inorganic silicate compound, or by adding urea to a solution containing a zinc salt of an inorganic or organic acid and an organic silicate compound, until a precipitate is formed, and subsequently baking the precipitate at at least 500.degree. C.