Glycol ether compounds for the production of polyolefin catalyst

Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Silicon containing or process of making

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502234, 502236, 502237, 423326, 423338, 423339, B01J 2106

Patent

active

055762620

ABSTRACT:
A method of making chromium containing oxide gel-based catalyst wherein an oxide hydrogel is convened to a xerogel by azeotropic distillation of a mixture of said hydrogel and an organic solvent, the improvement comprising impregnating the gel with a chromium compound during azeotropic distillation by incorporating said chromium compound into said mixture before azeotropic distillation and wherein the organic solvent used is selected from the group consisting of ethoxy ethyl acetate, tert-butyoxy propanol, methoxy propyl acetate, n-butoxy propanol, ethoxy ethyl propionate and mixtures thereof.

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patent: 5206189 (1993-04-01), Caldwell

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