发明名称 |
Process control in the presence of chromium based catalyst |
摘要 |
<p>A continuous process for the polymerization of one or more alpha-olefins in the gas phase in the presence of a chromium based catalyst, under polymerization conditions including the reaction temperature, the pressure, and the target oxygen to alpha-olefin molar ratio operating point required for desired resin properties, comprising the following steps: (i) establishing limits on (a) the amount of catalyst and (b) the oxygen to alpha-olefin molar ratio; (ii) establishing a desired resin production rate in pounds per hour; (iii) determining the actual production rate as the polymerization progresses; (iv) determining the amount of catalyst required (a) to bring the actual production rate into line with the desired production rate and (b) to bring the oxygen to alpha-olefin molar ratio to the target oxygen to alpha-olefin molar ratio operating point; (v) determining the oxygen to alpha-olefin molar ratio required to bring the actual production rate into line with the desired production rate; (vi) determining the amount of oxygen required for the oxygen to alpha-olefin molar ratio; (vii) introducing catalyst, alpha-olefin, and oxygen into a reactor in the amounts necessary to satisfy the preceding steps; and (viii) adjusting the target oxygen to alpha-olefin molar ratio operating point as indicated by analysis of the polymer produced for the desired resin properties.</p> |
申请公布号 |
EP0866077(A1) |
申请公布日期 |
1998.09.23 |
申请号 |
EP19980302063 |
申请日期 |
1998.03.19 |
申请人 |
UNION CARBIDE CHEMICALS & PLASTICS TECHNOLOGY CORPORATION |
发明人 |
SAMPLES, PAUL K.;MATTHEWS, WILLIAM A.;PARRISH, JOHN R.;HARTLEY, IVAN J.;LEE, KIU HEE |
分类号 |
C08F2/34;C08F2/38;C08F4/24;C08F4/78;C08F10/00;C08F10/02;C08F210/16;(IPC1-7):C08F2/38 |
主分类号 |
C08F2/34 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|