Borealis Ag

Mohammad Al-Haj Ali

Vasileios Kanellopoulos

Henry Sleijster

Samuli Zitting

Erik A Eriksson

Sameer Vijay

Guhan Mathivanan

Apostolos Krallis

Michiel Bergstra

Kauno Alastalo

Charlotta Weber

Velichko Hristov

Mubashar Sattar

Klaus Nyfors

Markku Vahteri

Christof Wurnitsch

Jukka Räsänen

Noureddine Ajellal

Jani Aho

Ravindra Tupe

Jouni Takakarhu

Gunter Weickert

Eric-Jan Prinsen

Pablo Ivan Aguayo Arellano

Stefan Hochradl

Alexander Standler

Gert Stijnen

Apostólos Krallis

Jukka Rasanen

The present invention is concerned with a screening assembly comprising a separating device connected to a conduit for an effluent stream comprising a polymer and a mixture of hydrocarbons, wherein the separating device is configured to separate the effluent stream into a polymer-rich stream and a polymer-lean vapor stream, wherein the first separation device comprises an inlet, a first outlet for withdrawing a polymer-rich stream, and a second outlet for withdrawing a polymer-lean vapor stream, a screening device connected to the separating device via a conduit for the polymer-lean vapor stream, wherein the screening device comprises a first inlet connected to the conduit for the polymer-lean vapor stream, a first outlet for withdrawing a cleaned vapor stream, a second outlet for withdrawing a polymer-comprising condensed vapor stream, and at least one second inlet for introducing a condensed vapor stream.

Screening assembly and process for screening polymer from an effluent stream at reduced levels of polymer entrainment

The current application is related to a process for separating volatile compounds from a reaction mixture comprising a polymer and said volatile compounds, comprising the steps of passing the reaction mixture through the inlet into the gravimetric vessel of the gravimetric separator of a separating device according to the present invention, withdrawing a first polymer-rich stream comprising mainly polymer through the first outlet of the gravimetric vessel, withdrawing a first polymer-lean stream comprising mainly volatile compounds through the second outlet of the gravimetric vessel, passing at least a part of the polymer-lean stream as a second polymer-lean stream through the first inlet into the flash vessel of the flash separator of the separating device according to the present invention, withdrawing a liquid stream through the first outlet of the flash vessel, and withdrawing a gaseous stream through the second outlet of the flash vessel.

Separating device for separating volatile compounds from a polymer reaction mixture

The disclosure relates to a polymerization process. The polymerization process comprises polymerizing an olefin monomer and a comonomer in the presence of a polymerization catalyst in a polymerization step conducted in a polymerization reactor in a solvent to produce a solution comprising a polymer of the olefin monomer and the comonomer. The polymerization process comprises withdrawing an exhaust stream of the solution from the polymerization reactor in a withdrawing step. The polymerization process comprises separating the exhaust stream to a first primary stream and a primary concentrated solution stream in a first primary separation step, wherein the first primary stream comprises hydrocarbons and polymer. The polymerization process comprises separating the first primary stream to a second primary stream and a third primary stream in a second primary separation step, wherein the second primary stream comprises dissolved polymer and the third primary stream comprises majority of the hydrocarbons. The polymerization process comprises cooling the third primary stream to a temperature of −80 to 20° C. in a primary cooling step to obtain a cooled third primary stream. The polymerization process comprises separating the cooled third primary stream to a fourth primary stream and a fifth primary stream in a third primary separation step, wherein the fourth primary stream comprises hydrocarbons in vapour phase and the fifth primary stream comprises liquid hydrocarbons. The polymerization process comprises returning the fourth primary stream and the fifth primary stream independently in a primary returning step to a location upstream of the polymerization reactor.

Polymerization process

Process for reducing the volatile organic compound content of plastomer having a density of equal to or lower than 883 kg/m3 and—a MFR2 of 100.0 g/10 min or lower (ISO 1133 at 2.16 kg load and 190° C.); to below 65 ppm (VOC, VDA277), the process comprising the steps of a) providing raw plastomer in granular form, the raw plastomer having a density of equal to or lower than 883 kg/m3; and a MFR2 of 100.0 g/10 min or lower (ISO 1133 at 2.16 kg load and 190° C.); and a volatile organic compound content (VOC, VDA277) of above 150 ppm, and the granules having an average D50 diameter of 2.5 to 4.5 mm b) subjecting said granular raw plastomer to at least one intensive hydrodynamic regime at a minimum temperature of at least 20° C. and a maximum temperature of 4° C. below the Vicat temperature (10 N, ISO 306) of the granular raw plastomer or 35° C., whatever value is lower, with the temperature measured at the gas inlet to the fast-fluidization regime, c) recovering the granular plastomer.

Process for obtaining low volatile plastomers

The invention relates to a process for removal of volatile components from an olefin polymer, the process carried out in an extruder comprising at least one vacuum degassing zone, said process comprising the steps of: (a) introducing a stream of an olefin polymer into the extruder; (b) extruding the olefin polymer in the extruder at a temperature which is higher than the melting temperature of the olefin polymer but lower than the decomposition temperature of the olefin polymer, thereby producing an olefin polymer melt having reduced amount of volatile components, wherein the process in the extruder has a residence time distribution broadness (&#x3c3;2) in the range of 800 to 4000 as define by equation (1) wherein: &#x3c3;2 is the residence time distribution broadness, T is the mean residence time, t is the interval of residence time a fluid element of the olefin polymer spends in the extruder, E(t) is the residence time distribution function, and wherein the process optionally comprises a step (c) where the melt of the olefin polymer is passed through a die zone to a pelletizer for pelletizing the obtained olefin polymer.&#x3c3;=&#x222b;()()&#x2003;&#x2003;equation (1)

Process for removing volatile components from an olefin polymer and article obtained

The present invention relates to a process for reducing the volatile organic compound (VOC) content of plastomers the process comprising the steps of subjecting the plastomer in granular form containing VOCs which is contained in an aeration vessel to a gasflow, and withdrawing granular plastomer from the aeration vessel which has a lower content of VOCs, wherein the average particle size of the granular plastomer is greater than 2.5 mm, preferably greater than 2.7 mm, more preferably greater than 3.0 mm, wherein the gas has a minimum temperature of at least 26&#xb0; C. measured at a gas inlet of the aeration vessel, and a maximum temperature of 4&#xb0; C. below the Vicat temperature (10N, ISO 306) of the granular plastomer or 35&#xb0; C. measured at the gas inlet of the aeration vessel, whatever value is lower, and wherein at least a part of the withdrawn granular plastomer is recirculated to the aeration vessel.

Process for reducing the VOC content of plastomers

The present invention relates to a process for removing hydrocarbons comprising the steps of:

Method of recovering olefins in a solution polymerisation process

A process for copolymerizing ethylene and at least one C3 to C8 alpha olefin to obtain an ethylene-C3 to C8 alpha olefin copolymer, the process comprising a) copolymerizing ethylene and at least one C3 to C8 alpha olefin in a solvent in a solution polymerization reactor to obtain an intermediate polymer solution, b) discharging an effluent stream from the intermediate polymer solution into a heat exchanger, c) setting the temperature of the effluent stream in the heat exchanger to obtain a heated effluent stream, d) feeding the heated effluent stream to a flash separation, e) separating at least a part of the ethylene-C3 to C8 alpha olefin copolymer in the flash separation, characterized by feeding an inert hydrocarbon fulfilling 90&#xb0; C.&#x3c;T(BP)&#x3c;130&#xb0; C. to the solution polymerization reactor; and/or accumulating an inert hydrocarbon fulfilling 90&#xb0; C.&#x3c;T(BP)&#x3c;130&#xb0; C. during the polymerization reaction; and/or feeding an inert hydrocarbon fulfilling 90&#xb0; C.&#x3c;T(BP)&#x3c;130&#xb0; C. to the discharged effluent stream of step b).

Phase-stabilized ethylene alpha olefin copolymerization process

The present invention is concerned with a process for providing a homogeneous particle-containing slurry comprising the steps of: (a) providing a vessel comprising at least one impeller rotating around a vertical axis of the vessel, wherein a rotational speed nof the at least one impeller is higher than naccording to equation (1), the vessel further comprising an inlet and an outlet; (b) introducing a particle-containing slurry into the vessel or introducing components forming the particle-containing slurry into the vessel; (c) rotating the at least one impeller at least around the vertical axis for homogenizing and/or maintaining a homogeneous particle distribution within the slurry; (d) withdrawing the homogeneous particle-containing slurry via the outlet; (e) reducing the rotational speed nof the at least one impeller to a reduced rotational speed n, whereas nis lower than nand higher or equal gas inlet than naccording to equation (1): 

Process for providing a homogenous slurry containing particles

The present invention relates to a process for removing hydrocarbons comprising the steps of: (A) passing a stream of a solution into a separator wherein a liquid phase comprising polymer and a vapor phase coexist; (B) withdrawing a vapor stream and a concentrated solution stream from the separator; (C) passing at least a part of the vapour stream into a first fractionator; (D) withdrawing a first overhead stream and a first bottom stream from the first fractionator; (E) passing the first bottom stream to a second fractionator; (F) withdrawing a second overhead stream and a second bottom stream from the second fractionator; characterized in that at least a part of the second overhead stream is withdrawn as a purge stream.

Method of recovering olefins in a solution polymerization process

The present invention relates to a process and apparatus for withdrawing polymer agglomerates from a fluidised bed polymerisation reactor, the polymerisation reactor comprising a bottom zone having a generally conical shape and no fluidisation grid. The agglomerates are withdrawn by using an agglomerate trap below the bottom zone. A value of a process variable indicative of the content of agglomerates in the agglomerate trap is measured and the opening time of the valves transferring polymer to and from the agglomerate trap is adjusted based on the measured value.

Method for withdrawing agglomerates from a fluidized bed polymerization reactor

The present invention relates to a method of reducing the entrainment of polymer in the polymer-lean liquid phase in a separator, comprising the steps of: (i) Selecting the diameter of the polymer droplets in the polymer solution entering the separator; (ii) Determining the traveling time of the polymer droplets in the separator; and (iii) Adjusting the residence time of the polymer-dense phase in the separator to be at least the traveling time of the polymer droplets, a solution polymerization process using said method for reducing the entrainment of polymer in the polymer-lean liquid phase in the separator and the use of said method for determining the minimum residence time of the polymer solution in the separator required to ensure efficient separation of a polymer solution into a polymer-lean phase and a polymer-rich phase.

Method of reducing the entrainment of polymer in the polymer-lean liquid phase of a separator

A process for reducing the volatile organic compound content of granular plastomers having a density of equal to or lower than 883 kg/mand a MFRof 100.0 g/10 min or lower (ISO 1133 at 2.16 kg load and 190&#xb0; C.), to below 65 ppm (VOC, VDA277), the process comprising the steps of providing a granular raw plastomer in a treatment vessel, the granular raw plastomer having a density of equal to or lower than 883 kg/m, and a MFRof 100.0 g/10 min or lower (ISO 1133 at 2.16 kg load and 190&#xb0; C.), and a volatile organic compound content (VOC, VDA277) of above 150 ppm, subjecting said granular raw plastomer to a gasflow within the range of 30 m/(h t) to 150 m/(h t) for an aeration time of less than 96 hours, whereby the gas has a minimum temperature of at least 26&#xb0; C. measured at a gas inlet of the treatment vessel and a maximum temperature of 4&#xb0; C. below the Vicat temperature (10 N, ISO 306) of the granular raw plastomer or 35&#xb0; C. measured at the gas inlet of the treatment vessel, whatever value is lower; and recovering the granular plastomer.

The present invention is directed to a process for separating an olefin copolymer from volatile gases using a flash separator. The flash separator can be used with a solution or high pressure process. The mass transport of volatile gases from the viscous polymer melt is increased.

Method for separating hydrocarbons from polymer

The present invention deals with a process for polymerising olefins in a solution and withdrawing a stream of the solution from the polymerisation reactor and passing it to a sequence of heating steps. The heated solution is passed to a separation step, which is conducted at a pressure of no more than 15 bar and in which separation step a liquid phase comprising the polymer and a vapour phase coexist. A vapour stream and a concentrated solution stream comprising the polymer are withdrawn from the separation step. At least a part of the vapour stream is passed to the first polymerisation reactor, to the second polymerisation reactor or to both.

Growing community of inventors

Helsinki, Finland

Mohammad Al-Haj Ali