-Polymers to be produced using the chromium / alumina catalyst group and how to prepare the active chromium / alumina catalyst group through treatment with sulfuric acid salt

摘要

Was provided a method for preparing a polymerization catalyst, contact sulfating agent and a carrier containing alumina and chromium include it. The carrier may be calcined after the sulfating agent and were loaded with chromium on the support. Alternatively the sulfating agent can be loaded while the calcined carrier. Alternatively the carrier may be calcined prior to contact with the organic chromium compound and a carrier after contact with a sulfating agent and a carrier. Catalyst group containing a sulfate treated alumina support and the chromium, which is formed by the above method are provided. Catalytic activity is improved to the family of catalytic compositions. A method of manufacturing a polymer containing a contact with the catalyst composition and the olefin group at least one. The polymer composition class shows a relatively high molecular weight and long chain branching of relatively low degree.