HCID 178445855, Verbindung → Chromium

Beteiligte Stoffe

Reaktionsschritte

Tetrakis(neopentyl)chromium is prepared essentially by a method disclosed in U.S. Pat. No. 3,875,132. The base catalyst is prepared by dispersing tetrakis(neopentyl)chromium in heptane solution onto Davison 952 MS-ID silica, predried at 1300° F. for 5 hours in a fluid bed, in such a ratio as to give 1% chromium by weight on the dry basis in the impregnated catalyst. The base catalyst thus prepared is activated, in one case, by the method of Example 8 and, in the other case, by the method of Example 9 which includes further treatment of the activated catalyst at 1200° F. for a period of 15 minutes with dry air.

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