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:
Aug. 11, 1998
Filed:
Nov. 09, 1994
John H Grate, Mountain View, CA (US);
David R Hamm, Mountain View, CA (US);
Robert J Saxton, West Chester, PA (US);
Catalytica, Inc., Mountain View, CA (US);
Abstract
The present invention provides a process for the preparation of acidic aqueous solutions consisting essentially of, phosphomolybdovanadate salts. Certain processes of the present invention dissolve in water an oxide, oxoacid, or mixtures thereof, and at least one oxoanion salt of phosphorus, molybdenum, and vanadium, wherein the sum of salt cationic charges does not exceed the sum of the phosphomolybdovanadate anionic charges in the solution. Other processes of the present invention dissolve in water a) an oxide, oxoacid, oxoanion salt, or mixtures thereof of phosphorus, molybdenum, and vanadium and b) a carbonate salt, bicarbonate salt, hydroxide salt or mixtures thereof, wherein the sum of salt cationic charges does not exceed the sum of the phosphomolybdovanadate anionic charges in the solution. The present invention also provides processes for the preparation of solid phosphomolybdovanadate salts by evaporating the so-produced aqueous solutions to recover essentially all the dissolved phosphomolybdovanadate salt in solid form.