Polymerization Processes

In a gas phase fluidized bed polymerization process for the production of polyolefin polymers, such as polyethylene polymers or polypropylene polymers, loss of ethylene or propylene accompanying inert gas purging is reduced by passing an ethylene- or propylene-containing purge stream through a vent column to contact a hydrocarbon liquid flowing through the vent column contercurrent to the purge stream whereby unreacted ethylene or propylene in the purge stream portion is dissolved in the hydrocarbon liquid to produce an ethylene- or propylene-enriched liquid stream and an ethylene- or propylene-depleted gaseous stream. The ethylene- or propylene-enriched liquid stream is then recycled to the fluidized bed reactor, while at least part of the ethylene- or propylene-depleted gaseous stream is purged. 1. A gas phase fluidized bed polymerization process for the production of polyethylene polymers or polypropylene polymers , the process comprising:(a1) supplying at least one particulate catalyst to at least one fluidized bed reaction zone using at least one inert carrier gas;(b1) continuously supplying at least one feed stream comprising ethylene or propylene to the at least one fluidized bed reaction zone operating under polymerization conditions effective to produce the polyethylene polymers or polypropylene polymers;(c1) withdrawing from the at least one fluidized bed reaction zone at least a portion of the polyethylene polymers or polypropylene polymers and at least one gaseous recycle stream comprising the at least one inert carrier gas and unreacted ethylene or propylene;(d1) compressing and cooling the at least one gaseous recycle stream to produce a compressed and cooled recycle stream;(e1) returning at least a first portion of the compressed and cooled at least one recycle stream to the fluidized bed reactor;(f1) withdrawing at least a second portion of the compressed and cooled recycle stream through at least one vent column to contact a hydrocarbon liquid ...

Process for Producing Polyethylene Polymers

A process for producing polyethylene polymers including contacting ethylene and at least one Cto Calpha-olefin comonomer with a polymerization catalyst on a particulate support in a fluidized bed polymerization reactor under conditions effective to polymerize at least part of the ethylene and comonomer and produce the polyethylene polymers, wherein the support has a dparticle size as measured by laser diffraction of at least 18 microns, is provided.

Gas olefin polymerization process

The present invention relates to a continuous gas phase process comprising polymerizing one or more hydrocarbon monomer(s) in a fluidized bed reactor in the presence of catalyst system or polymerization catalyst and a condensable fluid for a period of at least 12 hours where the bed temperature is less than the Critical Temperature and the dew point temperature of the gas composition in the reactor is within 25 °C of the bed temperature.

Process for polymerizing monomers in fluidized beds

The invention is directed toward polymerizing or copolymerizing alpha-olefins either alone or in combination with one or more other alpha-olefins in a gas phase reactor having a fluidized bed and a fluidizing medium such that the fluidizing medium entering the reactor comprises a gas and a liquid phase.

Process for polymerizing monomers in fluidized beds

The invention is directed toward polymerizing alpha-olefins either alone or in combination with one or more other alpha-olefins utilizing a bulky ligand transition metal catalyst in a gas phase fluidized bed polymerization reactor operating in condensed mode.

Process for polymerizing monomers in fluidized beds

The invention is directed toward polymerizing or copolymerizing alpha-olefins either alone or in combination with one or more other alpha-olefins in a gas phase reactor having a fluidized bed and a fluidizing medium such that the fluidizing medium entering the reactor comprises a gas and a liquid phase.

Process for polymerizing monomers in fluidized beds

The invention is directed toward polymerizing or copolymerizing alpha-olefins either alone or in combination with one or more other alpha-olefins in the presence of a metallocene catalyst in a gas phase reactor having a fluidized bed and a fluidizing medium such that the fluidizing medium entering the reactor comprises a gas and a liquid phase.

Gas olefin polymerization process

The present invention relates to a continuous gas phase process comprising polymerizing one or more hydrocarbon monomer(s) in a fluidized bed reactor in the presence of catalyst system or polymerization catalyst and a condensable fluid for a period of at least 12 hours where the bed temperature is less than the Critical Temperature and the dew point temperature of the gas composition in the reactor is within 25 °C of the bed temperature.

Gas olefin polymerization process

The present invention relates to a continuous gas phase process comprising polymerizing one or more hydrocarbon monomer(s) in a fluidized bed reactor in the presence of catalyst system or polymerization catalyst and a condensable fluid for a period of at least 12 hours where the bed temperature is less than the Critical Temperature and the dew point temperature of the gas composition in the reactor is within 25 °C of the bed temperature.

Gas olefin polymerization process

Gas olefin polymerization process

The present invention relates to a continuous gas phase process comprising polymerizing one or more hydrocarbon monomer(s) in a fluidized bed reactor in the presence of catalyst system or polymerization catalyst and a condensable fluid for a period of at least 12 hours where the bed temperature is less than the Critical Temperature and the dew point temperature of the gas composition in the reactor is within 25 ~C of the bed temperature.

Gas olefin polymerization process

The present invention relates to a continuous gas phase process comprising polymerizing one or more hydrocarbon monomer(s) in a fluidized bed reactor in the presence of catalyst system or polymerization catalyst and a condensable fluid for a period of at least 12 hours where the bed temperature is less than the Critical Temperature and the dew point temperature of the gas composition in the reactor is within 25 °C of the bed temperature.

Polymerization process

THE PRESENT INVENTION RELATES TO A CONTINUOUS GAS PHASE PROCESS COMPRISING POLYMERIZING ONE OR MORE HYDROCARBON MONOMER(S) IN A FLUIDIZED BED REACTOR (7) IN THE PRESENCE OF CATALYST SYSTEM OR POLYMERIZATION CATALYST (3) AND A CONDENSABLE FLUID FOR A PERIOD OF AT LEAST 12 HOURS WHERE THE BED TEMPERATURE IS LESS THAN THE CRITICAL TEMPERATURE AND THE DEW POINT TEMPERATURE OF THE GAS COMPOSITION IN THE REACTOR (7) IS WITHIN 25° C. OF THE BED TEMPERATURE.(FIG 1)

Polymerization process

The present invention relates to a continuous gas phase process comprising polymerizing one or more hydrocarbon monomer(s) in a fluidized bed reactor in the presence of a Ziegler-Natta-type catalyst system and a condensable fluid for a period of at least 12 hours where the bed temperature is less than the Critical Temperature and the dew point temperature of the gas composition in the reactor is within 25° C. of the bed temperature.

Method for on-line monitoring and control of polymerization processes and reactors to prevent discontinuity events

Generally, a method of monitoring a polymerization reaction in a fluid bed reactor to generate, in on-line fashion, data indicative of the imminent occurrence of a discontinuity event (for example, sheeting) and optionally also control the reaction to prevent the occurrence of the discontinuity event is provided. Typical embodiments include the steps of generating in on-line fashion at least one of bed static data indicative of static charge in the fluidized bed and carryover static data indicative of carryover static; and generating at least one of temperature data (in on-line fashion using at least one monitored reaction parameter) indicative of a first temperature and acoustic emission data indicative of resin stickiness in the reactor, where the first temperature is indicative of at least one of degree of resin stickiness in the reactor and a characteristic of melting behavior of polymer resin in the reactor in the presence of at least one diluent.

Polymerization process

The present invention relates to a continuous gas phase process comprising polymerizing one or more hydrocarbon monomer(s) in a fluidized bed reactor in the presence of catalyst system or polymerization catalyst and a condensable fluid for a period of at least 12 hours where the bed temperature is less than the Critical Temperature and the dew point temperature of the gas composition in the reactor is within 25° C. of the bed temperature.

Polymerization process

The present invention relates to a continuous gas phase process comprising polymerizing one or more hydrocarbon monomer(s) in a fluidized bed reactor in the presence of catalyst system or polymerization catalyst and a condensable fluid for a period of at least 12 hours where the bed temperature is less than the Critical Temperature and the dew point temperature of the gas composition in the reactor is within 25° C. of the bed temperature.

Gas olefin polymerization process

Gas olefin polymerization process

Process for deactivating Ziegler-Natta and metallocene catalysts

A process for deactivating Ziegler-Natta and metallocene catalysts or catalyst systems "such systems are typically used for olefin polymerization". The process includes heating the active catalyst or catalyst system to a temperature sufficient to drive off volatile constituents, and to form complexes and compounds that are non-reactive or less reactive with ambient air than the active catalyst or catalyst system. The process includes steps for safe deactivation including scrubbing to substantially eliminate corrosive compounds, and burning volatile chemicals in a flare. This process essentially eliminates the production of hazardous classification waste from conventional water catalyst deactivation techniques.

Method for on-line monitoring and control of polymerization processes and reactors to prevent discontinuity events

Polymerization processes

In a gas phase fluidized bed polymerization process for the production of polyolefin polymers, such as polyethylene polymers or polypropylene polymers, loss of ethylene or propylene accompanying inert gas purging is reduced by passing an ethylene- or propylene-containing purge stream through a vent column to contact a hydrocarbon liquid flowing through the vent column contercurrent to the purge stream whereby unreacted ethylene or propylene in the purge stream portion is dissolved in the hydrocarbon liquid to produce an ethylene- or propylene-enriched liquid stream and an ethylene- or propylene-depleted gaseous stream. The ethylene- or propylene-enriched liquid stream is then recycled to the fluidized bed reactor, while at least part of the ethylene- or propylene-depleted gaseous stream is purged.

Gas phase reactor startup process

A gas phase reactor startup process comprising providing a reactor having a vertical cylindrical portion from a distributor plate at the base to a neck at the top and comprising a fluidized bed zone therebetween, wherein above the neck and connected thereto is a frustoconical portion closed at the top, the vertical cylindrical portion having a length from the distributor plate to the neck; providing a bed of polyolefin granules within the fluidized bed zone; wherein the polyolefin granules fill the fluidized bed zone to a resting bed level within a range from 75% to 90% of the length of the vertical cylindrical portion prior to fluidization with cycle gas; flowing cycle gas to fluidize the polyolefin granules and form a fluidized bed having a fluidized bed level greater than the resting bed level; and injecting metallocene catalyst into the fluidized bed zone.

Production of olefin derivatives

Disclosed is a system of making an olefin derivative from a dilute olefin feed. Dilute olefin is sent to an olefin reaction unit to form an olefin derivative product. The olefin derivative product is recovered from the reaction unit while a vent stream is also removed. Olefin is separated from the vent stream, and the olefin is sent to the olefin reaction unit for additional processing.

Production of olefin derivatives

Disclosed is a system of making an olefin derivative from a dilute olefin feed. Dilute olefin (1) is sent to an olefin reaction unit (3) to form an olefin derivative product. The olefin derivative product (4) is recovered from the reaction unit while a vent stream (5) is also removed. A portion of the vent steam may be recycled back to the reaction unit via line (9). The vent stream is sent to an olefin separation unit (6), where an olefin stream (7) is recovered and returned to the olefin reaction unit for additional processing. The non-olefin compounds are removed via purge (8). Using appropriate recycle of vent gas within the olefin reaction unit allows the use of a high quality olefin stream in the olefin reaction process with a reduced risk of equipment fouling and catalyst contamination, while maintaining a high product quality.

Polymerization process

A process including contacting one or more monomers, at least one catalyst system, and a condensing agent including a majority of 2,2-dimethylpropane under polymerizable conditions to produce a polyolefin polymer is provided.

Method for on-line monitoring and control of polymerization processes and reactors to prevent discontinuity events

Generally, a method of monitoring a polymerization reaction in a fluid bed reactor to generate, in on-line fashion, data indicative of the imminent occurrence of a discontinuity event (for example, sheeting) and optionally also control the reaction to prevent the occurrence of the discontinuity event is provided. Typical embodiments include the steps of generating in on-line fashion at least one of bed static data indicative of static charge in the fluidized bed and carryover static data indicative of carryover static; and generating at least one of temperature data (in on-line fashion using at least one monitored reaction parameter) indicative of a first temperature and acoustic emission data indicative of resin stickiness in the reactor, where the first temperature is indicative of at least one of degree of resin stickiness in the reactor and a characteristic of melting behavior of polymer resin in the reactor in the presence of at least one diluent.

System for fluidizing solid particles including novel outlet for vessel

A system for fluidizing solid particles is provided, wherein the fluidized bed system includes a fluidized bed vessel, a fluidized bed section, a disengagement section, a recycle line, and a tapered outlet. Also provided is a method of fluidizing solids by providing a system as described above, fluidizing a bed comprising solid particles, and removing a recycle stream through the tapered outlet.

Process for producing polyethylene polymers

A process for producing polyethylene polymers including contacting ethylene and at least one C3 to C8 alpha-olefin comonomer with a polymerization catalyst on a particulate support in a fluidized bed polymerization reactor under conditions effective to polymerize at least part of the ethylene and comonomer and produce the polyethylene polymers, wherein the support has a d10 particle size as measured by laser diffraction of at least 18 microns, is provided.

Process for producing polyethylene polymers

A process for producing polyethylene polymers including contacting ethylene and at least one C3 to C8 alpha-olefin comonomer with a polymerization catalyst on a particulate support in a fluidized bed polymerization reactor under conditions effective to polymerize at least part of the ethylene and comonomer and produce the polyethylene polymers, wherein the support has a d10 particle size as measured by laser diffraction of at least 18 microns, is provided.

Method of polymerising monomers in fluidised bed

The invention is directed toward polymerizing or copolymerizing alpha-olefins either alone or in combination with one or more other alpha-olefins in a gas phase reactor having a fluidized bed and a fluidizing medium such that the fluidizing medium entering the reactor comprises a gas and a liquid phase.

Process for polymerizing monomers in fluidized beds

THE INVENTION IS DIRECTED TOWARD POLYMERIZING OR COPOLYMERIZING ALPHA-OLEFINS EITHER ALONE OR IN COMBINATION WITH ONE OR MORE OTHER ALPHA-OLEFINS IN A GAS PHASE REACTOR HAVING A FLUIDIZED BED AND A FLUIDIZING MEDIUM SUCH THAT THE FLUIDIZING MEDIUM ENTERING THE REACTOR COMPRISES A GAS AND A LIQUID PHASE.

Process for polymerizing monomers in fluidized bed

Process for polymerizing fluidized bed monomers

Method of polymerising monomers in fluidised bed

The invention is directed toward polymerizing or copolymerizing alpha-olefins either alone or in combination with one or more other alpha-olefins in the presence of a metallocene catalyst in a gas phase reactor having a fluidized bed and a fluidizing medium such that the fluidizing medium entering the reactor comprises a gas and a liquid phase.

Process for polymerizing monomers in fluidized beds

THE INVENTION IS DIRECTED TOWARD POLYMERIZING OR COPOLYMERIZING ALPHA-OLEFINS EITHER ALONE OR IN COMBINATION WITH ONE OR MORE OTHER ALPHA-OLEFINS IN THE PRESENCE OF A METALLOCENE CATALYST IN A GAS PHASE REACTOR HAVING A FLUIDIZED BED AND A FLUIDIZING (16) MEDIUM SUCH THAT THE FLUIDIZING MEDIUM (16) ENTERING THE REACTOR (10) COMPRISES A GAS AND A LIQUID PHASE.

Polymerization process

Gas olefin polymerization process

Process for producing polyethylene polymers

A process for producing polyethylene polymers including contacting ethylene and at least one C 3 to C 8 alpha-olefin comonomer with a polymerization catalyst on a particulate support in a fluidized bed polymerization reactor under conditions effective to polymerize at least part of the ethylene and comonomer and produce the polyethylene polymers, wherein the support has a d 10 particle size as measured by laser diffraction of at least 18 microns, is provided.

Method for on-line monitoring and control of polymerization processes and reactors to prevent discontinuity events

Generally, a method of monitoring a polymerization reaction in a fluid bed reactor to generate, in on-line fashion, data indicative of the imminent occurrence of a discontinuity event (for example, sheeting) and optionally also control the reaction to prevent the occurrence of the discontinuity event is provided. Typical embodiments include the steps of generating in on-line fashion at least one of bed static data indicative of static charge in the fluidized bed and carryover static data indicative of carryover static; and generating at least one of temperature data (in on-line fashion using at least one monitored reaction parameter) indicative of a first temperature and acoustic emission data indicative of resin stickiness in the reactor, where the first temperature is indicative of at least one of degree of resin stickiness in the reactor and a characteristic of melting behavior of polymer resin in the reactor in the presence of at least one diluent.

Process for producing polyethylene polymers

A process for producing polyethylene polymers including contacting ethylene and at least one C3 to C8 alpha-olefin comonomer with a polymerization catalyst on a particulate support in a fluidized bed polymerization reactor under conditions effective to polymerize at least part of the ethylene and comonomer and produce the polyethylene polymers, wherein the support has a d10 particle size as measured by laser diffraction of at least 18 microns, is provided.

System for fluidizing solid particles including novel outlet for vessel

A system for fluidizing solid particles is provided, wherein the fluidized bed system includes a fluidized bed vessel, a fluidized bed section, a disengagement section, a recycle line, and a tapered outlet. Also provided is a method of fluidizing solids by providing a system as described above, fluidizing a bed comprising solid particles, and removing a recycle stream through the tapered outlet.

Polymerization process comprising 2,2-dimethylpropane as condensing agent

A process including contacting one or more monomers, at least one catalyst system, and a condensing agent including a majority of 2,2-dimethylpropane under polymerizable conditions to produce a polyolefin polymer is provided.

Polymerization process comprising 2,2-dimethylpropane as condensing agent

A process including contacting one or more monomers, at least one catalyst system, and a condensing agent including a majority of 2,2-dimethylpropane under polymerizable conditions to produce a polyolefin polymer is provided.

Gas-phase olefin polymerization process

In a gas phase fluidized bed polymerization process for the production of polyolefin polymers, such as polyethylene polymers or polypropylene polymers, loss of ethylene or propylene accompanying inert gas purging is reduced by passing an ethylene- or propylene- containing purge stream through a vent column to contact a hydrocarbon liquid flowing through the vent column contercurrent to the purge stream whereby unreacted ethylene or propylene in the purge stream portion is dissolved in the hydrocarbon liquid to produce an ethylene- or propylene- enriched liquid stream and an ethylene- or propylene- depleted gaseous stream. The ethylene- or propylene- enriched liquid stream is then recycled to the fluidized bed reactor, while at least part of the ethylene- or propylene- depleted gaseous stream is purged.

Process for producing polyethylene polymers

A process for producing polyethylene polymers including contacting ethylene and at least one C 3 to C 8 alpha-olefin comonomer with a polymerization catalyst on a particulate support in a fluidized bed polymerization reactor under conditions effective to polymerize at least part of the ethylene and comonomer and produce the polyethylene polymers, wherein the support has a d 10 particle size as measured by laser diffraction of at least 18 microns, is provided.

Gas phase polymerization process in condensed mode

PROCESSO DE POLIMERIZAÇÃO EM FASE GASOSA EM MODO CONDENSADO POLYMERIZATION PROCESS IN GAS PHASE IN CONDENSATE MODE

Polymerization process

A process including contacting one or more monomers, at least one catalyst system, and a condensing agent including a majority of 2,2-dimethylpropane under polymerizable conditions to produce a polyolefin polymer is provided.

polymerization process

é apresentado um processo que inclui o contato de um ou mais monômeros, pelo menos um sistema catalítico e um agente de condensação que inclui uma maioria de 2,2-dimetilpropano em condições polimerizáveis para produzir um polímero de poliolefina. A process comprising contacting one or more monomers, at least one catalytic system and a condensing agent including a majority of 2,2-dimethylpropane under polymerizable conditions to produce a polyolefin polymer is disclosed.

Production of olefin derivatives

Disclosed is a system of making an olefin derivative from a dilute olefin feed. Dilute olefin (1) is sent to an olefin reaction unit (3) to form an olefin derivative product. The olefin derivative product (4) is recovered from the reaction unit while a vent stream (5) is also removed. A portion of the vent steam may be recycled back to the reaction unit via line (9). The vent stream is sent to an olefin separation unit (6), where an olefin stream (7) is recovered and returned to the olefin reaction unit for additional processing. The non-olefin compounds are removed via purge (8). Using appropriate recycle of vent gas within the olefin reaction unit allows the use of a high quality olefin stream in the olefin reaction process with a reduced risk of equipment fouling and catalyst contamination, while maintaining a high product quality.

Production of olefin derivatives

Production of olefin derivatives

Disclosed is a system of making an olefin derivative from a dilute olefin feed. Dilute olefin (1) is sent to an olefin reaction unit (3) to form an olefin derivative product. The olefin derivative product (4) is recovered from the reaction unit while a vent stream (5) is also removed. A portion of the vent steam may be recycled back to the reaction unit via line (9). The vent stream is sent to an olefin separation unit (6), where an olefin stream (7) is recovered and returned to the olefin reaction unit for additional processing. The non-olefin compounds are removed via purge (8). Using appropriate recycle of vent gas within the olefin reaction unit allows the use of a high quality olefin stream in the olefin reaction process with a reduced risk of equipment fouling and catalyst contamination, while maintaining a high product quality.

Fremstilling av olefinderivater

Production of olefin derivatives.

Preparation of olefin derivatives

Production of olefin derivatives

Disclosed is a system of making an olefin derivative from a dilute olefin feed. Dilute olefin (1) is sent to an olefin reaction unit (3) to form an olefin derivative product. The olefin derivative product (4) is recovered from the reaction unit while a vent stream (5) is also removed. A portion of the vent steam may be recycled back to the reaction unit via line (9). The vent stream is sent to an olefin separation unit (6), where an olefin stream (7) is recovered and returned to the olefin reaction unit for additional processing. The non-olefin compounds are removed via purge (8). Using appropriate recycle of vent gas within the olefin reaction unit allows the use of a high quality olefin stream in the olefin reaction process with a reduced risk of equipment fouling and catalyst contamination, while maintaining a high product quality.

Gas phase reactor startup process

A gas phase reactor startup process comprising providing a reactor having a vertical cylindrical portion from a distributor plate at the base to a neck at the top and comprising a fluidized bed zone therebetween, wherein above the neck and connected thereto is a frustoconical portion closed at the top, the vertical cylindrical portion having a length from the distributor plate to the neck; providing a bed of polyolefin granules within the fluidized bed zone; wherein the polyolefin granules fill the fluidized bed zone to a resting bed level within a range from 75% to 90% of the length of the vertical cylindrical portion prior to fluidization with cycle gas; flowing cycle gas to fluidize the polyolefin granules and form a fluidized bed having a fluidized bed level greater than the resting bed level; and injecting metallocene catalyst into the fluidized bed zone.