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. 24, 2002
Filed:
Jun. 05, 2001
Applicant:
Inventors:
Martin Philip Atkins, Ashford, GB;
Benjamin Patrick Gracey, Hull, GB;
James Noel Martin Hegarty, Hull, GB;
Mark Royston Smith, Beverley, GB;
Assignee:
BP Chemicals Limited, London, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D 1/100 ; B01J 2/106 ;
U.S. Cl.
CPC ...
B01D 1/100 ; B01J 2/106 ;
Abstract
This invention relates to a process for purifying a heteropolyacid which comprises: subjecting an aqueous solution comprising (i) the heteropolyacid and (ii) salt impurities to at least one liquid/liquid extraction step with an organic solvent, characterized in that the organic solvent comprises a dihydrocarbyl ether having at least 5 carbon atoms.