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Brief description of the (co -) polymerization of ethylene in the gaseous phase, in the presence of a catalyst comprising a chromium oxide and a composed of titanium and composed of an organometallic.
Brief description of the (co -) polymerization of ethylene in the gaseous phase, in the presence of a catalyst comprising a chromium oxide and a composed of titanium and composed of an organometallic.
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机译:在包含氧化铬和由钛组成并且由有机金属组成的催化剂的存在下,气相中乙烯的(共)聚合的简要描述。
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摘要
The present invention relates to a process for (co-)polymerizing ethylene in a gaseous phase, by means of a fluidized and/or mechanically stirred bed reactor, with the help of a catalyst comprising a chromium oxide and a titanium compound, supported on a refractory oxide and activated by a heat treatment. The process is characterized in that the catalyst is introduced into the reactor in the form of a dry powder consisting of particles free from prepolymer and the (co-)polymerization is carried out in the presence of an organoaluminium compound. The (co-)polymer thus obtained has substantially low catalyst residues, and an improved stress cracking resistance.
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