Aging of chromium-containing gel at high ph

Details Aging of chromium-containing gel at high ph Aging of chromium-containing gel at high ph

C - Chemistry, Metallurgy

08

F

252/104, 402/631

C08F 4/22 (2006.01) C08F 4/74 (2006.01) C08F 10/00 (2006.01)

Patent

CA 1190538

Abstract of the Disclosure A silica hydrogel containing chromium is aged under conditions such that at least a portion of the aging is carried out at a pH within the range of 7 to 9. The resulting hydrogel is converted to a xerogel by treating with a volatile organic liquid. The desired pH can be obtained either by adding a basic material such as ammonia to the hydro- gel prior to or during the aging process or by using a chromium component which inherently gives a higher pH and/or resists the natural tendency for the pH to decrease during aging. An example of such a chromium com- pound is chloropentammine chromium(III)chloride. The resulting catalyst on activation is particularly suitable for olefin polymerization under conditions where higher melt flow polymer is desired.

418967

Affiliated with

Also associated with

Rating

Aging of chromium-containing gel at high ph does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Aging of chromium-containing gel at high ph, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Aging of chromium-containing gel at high ph will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1236652