Polymerization catalyst used for producing polyolefins that...

Details Polymerization catalyst used for producing polyolefins that... Polymerization catalyst used for producing polyolefins that...

2005-05-24

2005-05-24

Lotengo, J. A. (Department: 1755)

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Halogen or compound containing same

C502S233000, C502S237000, C502S240000, C502S254000, C502S256000, C502S228000, C502S009000, C516S111000, C423S338000, C526S106000

Reexamination Certificate

active

06897181

ABSTRACT:
The invention relates to a process for preparing a catalyst for the polymerization of olefins, which comprises:a) preparation of a finely divided silica xerogel,b) loading of the xerogel with chromium from a solution of chromium trioxide or a chromium compound which is converted into chromium trioxide under the conditions of step c), andc) activation of the resulting product at from 400 to 1100° C. in a water-free gas stream comprising oxygen in a concentration of above 10% by volume,wherein a fluoride doping with a fluorinating agent is carried out in step b) or in step c). Furthermore, the invention relates to a catalyst for the polymerization of olefins which is obtainable by the process of the invention and to a process for the polymerization of olefins in which an olefin or an olefin mixture is polymerized in the presence of a catalyst according to the invention.

REFERENCES:
patent: 3130188 (1964-04-01), Hogan
patent: 3862104 (1975-01-01), Witt
patent: 3872217 (1975-03-01), Merz et al.
patent: 4042769 (1977-08-01), Lynch
patent: 4130505 (1978-12-01), Nasser et al.
patent: 4206297 (1980-06-01), Hoff et al.
patent: 5310712 (1994-05-01), Funk et al.
patent: 5352658 (1994-10-01), Evertz et al.
patent: 5455216 (1995-10-01), Mueller et al.
patent: 5625013 (1997-04-01), Mueller et al.
patent: 6645900 (2003-11-01), de Lange et al.
patent: 2 103 243 (1972-08-01), None
patent: 25 40 279 (1977-03-01), None
patent: 0 535 516 (1992-09-01), None
patent: 0 555 747 (1993-02-01), None
patent: 0 589 350 (1993-09-01), None
patent: 0 589 472 (1993-09-01), None
“Polymere Wirkstoffe”, vol. III, Stutgart, New York, Thieme Verlag, pp. 70 (1984), no month available.
McDaniel, “Supported Chromium Catalysts for Ethylene Polymerization”,Advances In Catalysis, vol. 33, pp. 47-98 (1985) no month available.

Affiliated with

Also associated with

Rating

Polymerization catalyst used for producing polyolefins that... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Polymerization catalyst used for producing polyolefins that..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polymerization catalyst used for producing polyolefins that... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3444711