Multimodal polyethylene obtained with multilayer chromium...

Details Multimodal polyethylene obtained with multilayer chromium... Multimodal polyethylene obtained with multilayer chromium...

2007-09-18

2007-09-18

Choi, Ling-Sui (Department: 1713)

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

Catalyst or precursor therefor

Boron or compound containing same

C502S103000, C502S107000, C502S132000, C526S352000, C526S104000

Reexamination Certificate

active

10297710

ABSTRACT:
The present invention concerns a catalyst for the production of high density polyethylene, by homopolymerising ethylene or copolymerising ethylene and an alpha-olefinic comonomer comprising 3 to 10 carbon atoms, prepared by the steps of: a) selecting a silica support with a specific surface area larger than 300 m2/g; b) treating the silica support with a titanium compound, in order to introduce titanium into the support, or with an aluminium compound, in order to introduce aluminium into the support; c) either treating the titanated silica support with an aluminum compound, in order to introduce aluminum into the titanated silica support, or treating the aluminated silica support with a titanium compound, in order to introduce titanium into the aluminated silica support; d) depositing a chromium compound on the titanated and aluminated silica support to form a catalyst; e) activating the catalyst of step d) under air in a fluidised bed at a temperature of from 600 to 800° C.

REFERENCES:
patent: 5885924 (1999-03-01), Ward
patent: 0 905 148 (1999-03-01), None
patent: 0 962 469 (1999-12-01), None

Affiliated with

Also associated with

Rating

Multimodal polyethylene obtained with multilayer chromium... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Multimodal polyethylene obtained with multilayer chromium..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multimodal polyethylene obtained with multilayer chromium... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3776208