发明名称 |
PROCESS CONTROL IN THE PRESENCE OF CHROMIUM BASED CATALYSTS |
摘要 |
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.
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申请公布号 |
CA2232207(A1) |
申请公布日期 |
1998.09.21 |
申请号 |
CA19982232207 |
申请日期 |
1998.03.16 |
申请人 |
UNION CARBIDE CHEMICALS & PLASTICS TECHNOLOGY CORPORATION |
发明人 |
HARTLEY, IVAN J.;PARRISH, JOHN R.;SAMPLES, PAUL K.;MATTHEWS, WILLIAM A.;LEE, KIU H. |
分类号 |
C08F2/34;C08F2/38;C08F4/24;C08F4/78;C08F10/00;C08F10/02;C08F210/16;(IPC1-7):C08F2/34;C08F4/69 |
主分类号 |
C08F2/34 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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