Polymerization process for olefins
AssigneeSabic Global Technologies B.V.
InventorsMpho Prudence Setlhaku, Martin Alexander Zuideveld, Bobby Johannes Henricus Hubertus Smeets
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Abstract
The present invention relates to a process for the polymerization of olefin monomers in the presence of a catalyst system, using a tubular pre-polymerization reactor, wherein the tubular pre-polymerization reactor has a length L and the flow of a catalyst system is introduced in the tubular pre-polymerization reactor in the middle (30-70% of L) or the end (70-95% of L) of the tubular pre-polymerization reactor.
Claims12
A process for the polymerization of olefin monomers in the presence of a catalyst system, the process comprising:
- a. feeding a liquid flow of one or more olefin monomers into a tubular pre-polymerization reactor;
- b. contacting the liquid flow of one or more olefin monomers with a flow of a catalyst system in the tubular pre-polymerization reactor to obtain a pre-polymer;
- c. feeding the pre-polymer obtained in step b) to a polymerization reactor;
- wherein the tubular pre-polymerization reactor has a length L and the flow of the catalyst system is introduced in the tubular pre-polymerization reactor in the middle within 30-70% of L or at the end within 70-95% of L of the tubular pre-polymerization reactor,
- wherein the tubular pre-polymerization reactor has a Length/Diameter (L/D) ratio of 1,000 to 50,000.
An apparatus for the polymerization of one or more olefin monomers comprising a tubular pre-polymerization reactor connected to a polymerization reactor, wherein the tubular pre-polymerization reactor has a length L and comprises
- an inlet for feeding a liquid flow of one or more olefin monomers at a beginning of the tubular pre-polymerization reactor,
- an inlet for feeding a catalyst system in the middle of the tubular actor within 30-70% of L,
- an inlet for feeding a catalyst system at the end of the tubular reactor within 70-959 of L, and
- an outlet at the end of the reactor for transferring the pre-polymer to the polymerization reactor,
- wherein the tubular pre-polymerization reactor has a Length/Diameter (L/D) ratio of 1,000 to 50,000.
Dependencies are inferred from the claim text.