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Chemical and Process Engineering Resources

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Category: Reactions and Processes
Question: How are olefins turned into polymers?
Keywords: ethylene,polymerization,ziegler,natta,catalyst
Answer: Typically, polymerization of olefins takes place in a gas phase reaction in the presence of a titanium-based Ziegler-Natta catalyst. A halogenated hydrocarbon is used to activate the catalyst. Examples of these halogenated hydrocarbons include: methylene chloride, chloroform, carbon tetrachloride, or trichloroethane. Chloroform is, by far, the most popular. The halogenated hydrocarbon is typically introducted to the reactor in a diluted form with alkanes serving as the solvent. The reaction temperature is typically from 60-100 degrees Celsius.More info: See US Patent Number 5990251