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:
Oct. 12, 1999
Filed:
May. 14, 1997
Swaminathan Sivaram, Pune, IN;
Soumen Sensarma, West Bengal, IN;
Council of Scientific & Industrial Research, New Delhi, IN;
Abstract
This invention is directed to a process for the preparation of a supported metallocene catalyst, said process comprising preparing a precursor catalyst material by dissolving a magnesium halide in an electron donor solvent in which the magnesium halide is completely soluble, heating the solution to a temperature in the range of 20.degree. C. to the boiling point of the respective electron donor for a period ranging between 10 to 60 minutes, separately preparing a solution of the metallocene compound into the same electron donor solvent, heating the solution to a temperature in the range of 25.degree. C. to 70.degree. C. for a period ranging between 0.1 to 0.5 hrs., mixing the two solutions to obtain a homogenous solution of catalyst precursor compound, stirring and maintaining this resulting homogenous solution at a temperature in the range of 50.degree. C. to 70.degree. C. for a period of 0.5 to 2 hrs., separately preparing a slurry of support in a liquid hydrocarbon medium, heating the slurry to a temperature in the range of 50.degree. C. to 70.degree. C. and stirring it for a period of 0.25 to 2 hrs., mixing the homogenous solution of the catalyst precursor compound with the slurry of the support, stirring the resulting slurry for 0.5 to 3 hrs. maintaining at a temperature ranging between 50.degree. C to 70.degree. C., cooling the resultant slurry to room temperature under an inert atmosphere, separating the solid by conventional methods, washing the solid with a hydrocarbon solvent and drying the solid under vacuum to obtain the product.