Process for the reduction of activated chromium oxide catalyst
AssigneeBasell Polyolefine GmbH
InventorsAchille De Battisti, Pier Luigi Di Federico, Dinara Iantilina, Christian Urgeghe
Life of this patent
Estimating the term…
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.
Claims5
A process for the reduction of a conventional Phillips catalyst comprising a chromium species, the process comprising contacting, under mixing conditions, said conventional Phillips catalyst, with a molar excess, in respect of the chromium species, of a solid reducing agent selected from monosaccharides, disaccharides or polysaccharides and subjecting the so obtained mixture to a temperature in the range of from 50 to 1000° C.
Dependencies are inferred from the claim text.