Continuous process for the production of ethylene copolymers
Abstract
Abstract PROCESS FOR THE CONTINUOUS PRODUCTION OF ELASTOMERIC COPOLYMERS OF ETHYLENE AND ONE OR MORE HIGHER ALPHA-OLEFINS HAVING 3 TO 8 CARBON ATOMS, PREFERABLY PROPYLENE; AND TERPOLYMERS OF ETHYLENE, AN ALPHA-OLEFIN OF 3 TO 8 CARBON ATOMS ANS A NONCONJUGATED ACYCLIC OR ALICYCLIC DIOLEFIN COMPRISES A MULTI-STAGED REACTOR SYSTEM TO WHICH SOLVENT, MONOMER, AND A ZIEGLER-NATTA CATALYST COMPOSITION CONSISTING OF A TRANSITION METAL CATALYST AND AN ORGANOALUMINUM COCATALYST ARE FED TO A FIRST STAGE WHEREIN POLYMERIZATION OCCURS AND FROM WHICH A POLYMER CEMENT IS FED TO SUBSEQUENT STAGES TO WHICH ARE FED THE SAME OR DIFFERENT MONOMERS, ORGANOALUMINUM COCATALYSTS AND A CATALYST REACTIVATOR. BY MEANS OF THE MULTISTAGED REACTOR SYSTEM, HIGHER RATES AND CONVERSIONS OF ALPHA-OLEFIN ARE ACHIEVED, YIELD OF POLYMER BASED ON THE TRANSITION METAL CATALYST IS INCREASED BY SEVERAL FOLD AND POLYMERS HAVING A BROAD RANGE OF MOLECULAR WEIGHTS ARE PRODUCED.
Inventors
- 👤 I Gardner
- 👤 C Cozewith
Bibliographic Details
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