Catalyst precursor particles, their preparation and use

Details Catalyst precursor particles, their preparation and use Catalyst precursor particles, their preparation and use

2008-10-15

2011-10-18

Wu, David W (Department: 1762)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C502S204000

Reexamination Certificate

active

08039564

ABSTRACT:
A method for preparing a catalyst precursor for an olefin polymerization catalyst involves the use of aqueous or alcoholic solutions of a chromium salt and of boric acid and aluminum carboxylate for deposition onto an inorganic support material, such as a silica xerogel. The chromium salt, aluminum carboxylate and boric acid are sufficiently soluble for deposition from a single solution to be effective. The catalyst precursor can be activated by calcination to form a catalyst for homo- or co-polymerisation of α-olefins which has productivity and melt flow index for the resulting polymer or copolymer which is comparable to results obtained with catalysts prepared by prior art organometallic routes. The activation of the catalyst precursor gives reduced levels of toxic or noxious fumes during activation compared to use of organometallic sources of chromium or aluminum.

REFERENCES:
patent: 3445367 (1969-05-01), Kallenbach et al.
patent: 3484428 (1969-12-01), Kallenbach et al.
patent: 3984351 (1976-10-01), Rekers et al.
patent: 3985676 (1976-10-01), Rekers et al.
patent: 4297461 (1981-10-01), Speca
patent: 4303770 (1981-12-01), Pullukat et al.
patent: 4814308 (1989-03-01), Konrad et al.
patent: 5895770 (1999-04-01), Pullukat et al.
patent: 7271122 (2007-09-01), Bodart et al.
patent: 7358385 (2008-04-01), Springer et al.
patent: 7638456 (2009-12-01), McDaniel et al.
patent: 2002/0132941 (2002-09-01), Lange et al.
patent: 0055863 (1982-07-01), None
patent: 92/17511 (1992-10-01), None
patent: 98/28348 (1998-07-01), None
patent: 01/87997 (2001-11-01), None
patent: 2005/054315 (2005-06-01), None
patent: 2005/111098 (2005-11-01), None
International Search Report for PCT/GB2008/003488 dated Jan. 23, 2009 (Form PCT/ISA/210).
Office Action issued for Korean Application No. 10-2010-7011247 dated Feb. 18, 2011 (Korean Translation).
Office Action issued for Korean Application No. 10-2010-7011247 dated Feb. 18, 2011 (English Translation).

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