Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Plural component system comprising a - group i to iv metal...
Patent
1997-05-14
1999-10-05
Bell, Mark L.
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Plural component system comprising a - group i to iv metal...
502104, 502115, 502121, 502122, 502123, 502124, 502125, 502126, 502127, 502134, 5261242, 526160, B01J 3100, B01J 3700, C08F 402, C08F 460
Patent
active
059623608
ABSTRACT:
The present invention is directed to a process for the preparation of a solid magnesium halide supported metallocene catalyst having a transition metal selected from the group consisting of IIIB, IVB, VB and VIB of the periodic table, which comprises preparing a slurry of magnesium metal in an electron donor solvent; heating the slurry of magnesium metal to 0.degree. C. to 50.degree. C. for a period of 10 minutes to 4 hr.; adding a dihaloalkane compound to said slurry to obtain a homogeneous solution of a support (solution A); separately preparing a solution of a metallocene compound in the same electron donor solvent as solution A (solution B); heating the solution B to 0.degree. C. to 50.degree. C. for a period ranging between 10 minutes and 1 hr., adding solution B to solution A over a period ranging between 10 minutes to 2 hrs. while maintaining the temperature in the range of 0 to 50.degree. C. to obtain a homogeneous solution; cooling the resultant homogeneous solution to room temperature under an inert atmosphere; pouring the reaction mixture into a liquid hydrocarbon medium in which all the components will be partly or completely insoluble to precipitate the solid catalyst; separating the solid catalyst precipitated, washing the solid catalyst with a hydrocarbon solvent; and drying the solid catalyst under vacuum at a temperature ranging between 0 to 50.degree. C.
REFERENCES:
patent: 4659685 (1987-04-01), Coleman, III et al.
patent: 5106804 (1992-04-01), Bailly et al.
European Patent Office database "esp@cenet", Abstract of JP 4275311, published Sep. 30, 1992, Idemitsu Petrochem Cp. Ltd.
Sensarma Soumen
Sivaram Swaminathan
Bell Mark L.
Council of Scientific and Industrial Research
Pasterczyk J.
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