<p>New methods for activating chromium catalysts for polymerization processes decrease the amount of time required for activation and increase catalyst activity. Rapid heating to a first temperature is followed by a first hold period before heating to a higher second temperature and maintaining the second temperature for a second hold period. In one aspect, the overall activation process takes less than 10 hours.</p>
申请公布号
WO2005113146(A1)
申请公布日期
2005.12.01
申请号
WO2005US16108
申请日期
2005.05.06
申请人
CHEVRON PHILLIPS CHEMICAL COMPANY LP;MCDANIEL, MAX, P.;BENHAM, ELIZABETH, A.