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. 05, 2008
Filed:
Apr. 21, 2005
Achille DE Battisti, Ferrara, IT;
Pier Luigi Di Federico, Ferrara, IT;
Dinara Iantilina, Bashkortostan, RU;
Christian Urgeghe, Pontelagoscuro, IT;
Achille De Battisti, Ferrara, IT;
Pier Luigi Di Federico, Ferrara, IT;
Dinara Iantilina, Bashkortostan, RU;
Christian Urgeghe, Pontelagoscuro, IT;
Basell Polyolefine GmbH, Wesseling, DE;
Abstract
Process for the reduction of a hexavalent chromium oxide based catalyst comprising contacting, under mixing conditions, a hexavalent chromium oxide based catalyst, with a molar excess, in respect of the chromium species, of a solid reducing agent and subjecting the mixture to a temperature in the range 30-1000° C. The process is simple, involves low costs and allows to obtain a permanently reduced chromium catalyst that can be disposed without toxicity risks.