发明名称 |
Continuous acid washing of polymer resin with controlled metering of acid |
摘要 |
A batch type process for purification of a polymer resin, in which a predetermined volume of acid is rapidly emptied and stirred into a fixed volume of polymer slurry for chemically treating impurities in the slurry, is converted to a continuous operation by supplying a substantially constant stream of polymer slurry and a controlled stream of acid to a mixing vessel. pH control of the polymer slurry required for effective purification of the polymer resin is achieved by manipulating the flow rate of the acid stream responsive to a feedforward control signal which operates in conjunction with a feedback signal. The feedforward signal is based on an upstream measurement of slurry flow rate to the mixing vessel and the feedback signal is based on a downstream pH measurement of slurry flowing from the mixing vessel.
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申请公布号 |
US5209855(A) |
申请公布日期 |
1993.05.11 |
申请号 |
US19910805405 |
申请日期 |
1991.12.10 |
申请人 |
PHILLIPS PETROLEUM COMPANY |
发明人 |
SOLAAS, DALE M.;CUMMINS, DONALD E.;KILE, GLENN W.;LONG, GEORGE E. |
分类号 |
B01J19/00;C08G75/02 |
主分类号 |
B01J19/00 |
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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