| 摘要 |
1532445 Controlled polymerization of an olefin in the gaseous phase IMPERIAL CHEMICAL INDUSTRIES Ltd 29 March 1976 [17 April 1975] 15863/75 Heading C3P An alphamonoolefin is polymerized in the gas phase in the presence of an agitated bed of a solid polymer of the olefin and in the presence of a transition metal catalyst under conditions of temperature and pressure which are controlled, e.g. by continuous monitoring and adjustment of monomer and/or coolant feed rate, to be close to dew point conditions. Typical combinations satisfying these conditions are temperature/pressure combinations of 10À1 to 15‹ C./98 psig.; 43À4 to 48À3‹ C./243 psig.; and 88À0 to 92À9‹ C./607 psig., for propylene. A suitable polymerization apparatus (not shown) is also described.
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