POLYMERIZATION PROCESS FOR OLEFIN-BASED POLYMERS

The invention provides a solution polymerization process comprising: A) polymerizing one or more monomers in the presence of a solvent that comprises a heavy hydrocarbon solvent and a light hydrocarbon solvent, to form a polymer solution; B) transferring the polymer solution to a Liquid-Liquid Separator, without adding heat to the solution, and wherein the pressure of the polymer solution is actively reduced in a controlled manner prior to, or within, the Liquid-Liquid Separator, to induce at least two liquid phases, a polymer-rich phase and a solvent-rich phase, and wherein the concentration of polymer in the polymer-rich phase is higher than that in the polymer solution transferred to the Liquid-Liquid Separator; and C) removing the solvent-rich phase. 1. A solution polymerization process comprising:A) polymerizing one or more monomers in the presence of a solvent that comprises a heavy hydrocarbon solvent and a light hydrocarbon solvent, to form a polymer solution;B) transferring the polymer solution to a Liquid-Liquid Separator, without adding heat to the solution, and wherein the pressure of the polymer solution is actively reduced in a controlled manner prior to, or within, the Liquid-Liquid Separator, to induce at least two liquid phases, a polymer-rich phase and a solvent-rich phase, and wherein the concentration of polymer in the polymer-rich phase is higher than that in the polymer solution transferred to the Liquid-Liquid Separator; andC) removing the solvent-rich phase.2. The process of claim 1 , wherein in step A claim 1 , the one or more monomers are polymerized in the presence of a solvent that comprises of a heavy hydrocarbon solvent and a light hydrocarbon solvent claim 1 , to form a single phase polymer solution.3. The process of claim 1 , wherein the polymer concentration in the polymer rich phase is controlled by adjusting the amount of light hydrocarbon component in the solvent.4. The process of claim 1 , wherein the polymerization of step A ...

SYSTEM AND PROCESS FOR OLEFIN POLYMERIZATION

The present invention provides a system and process for olefin polymerization. The inventive system and process for olefin polymerization facilitate lower operating vacuum pressures in the polymer recovery system by requiring at least two sequential condensing units, wherein at least one of the condensing units operates at significantly lower temperature ranges than the temperature ranges at which the current systems operate.

METHOD AND SYSTEM FOR POLYMER PRODUCTION

Disclosed herein is a system for solution polymerization comprising a reactor system that is operative to receive a monomer and to react the monomer to form a polymer; a plurality of devolatilization vessels located downstream of the reactor system, where each devolatilization vessel operates at a lower pressure than the preceding devolatilization vessel; and a heat exchanger disposed between two devolatilization vessels and in fluid communication with them, where the heat exchanger has an inlet port temperature of 100° C. to 230° C., an outlet port temperature of 200° C. to 300° C., an inlet port pressure of 35 to 250 kgf/cmand an outlet port pressure of 20 to 200 kgf/cm; and wherein the polymer solution remains in a single phase during its residence in the heat exchanger. 1. A system for solution polymerization comprising:a reactor system that is operative to receive at least one monomer in a solvent and to react the monomer to form a polymer;a plurality of devolatilization vessels located downstream of the reactor system, where each devolatilization vessel operates at a lower pressure than the preceding devolatilization vessel and wherein the plurality of devolatilization vessels receives a polymer solution from the reactor system; and{'sup': 2', '2, 'a first heat exchanger disposed between two devolatilization vessels and in fluid communication with them, where the first heat exchanger has an inlet port temperature of 120° C. to 230° C., an outlet port temperature of 200° C. to 300° C., an inlet port pressure of 35 to 250 kgf/cmand an outlet port pressure of 20 to 200 kgf/cm; and wherein the polymer solution remains in a single phase during its residence in the first heat exchanger.'}2. The system of claim 1 , further comprising a distributor disposed in at least one devolatilization vessel claim 1 , wherein the distributor comprises: a second conduit; where the first conduit lies inside the second conduit to define a first annular space therebetween; where the ...

PROCESS FOR PURIFICATION OF VENT STREAMS

Disclosed herein is a system for recovering olefins from a vent stream comprising an absorber; and a stripper; where the absorber and the stripper are in a recycle loop; and where the absorber is operative to treat a vent stream with a solvent to remove more than 99 wt % of a halogenated by-product contained in the vent stream and to recover 90 to 95 wt % of olefin molecules present in the vent stream; and where the stripper is operative to remove more than 99 wt % of the halogenated by-products present in the solvent; and where the solvent is recycled to the absorber. 1. A system for recovering olefins from a vent stream comprising:an absorber; anda stripper; where the absorber and the stripper are in a recycle loop; and where the absorber is operative to treat a vent stream with a solvent to remove more than 99 wt % of a halogenated by-product contained in the vent stream and to recover 90 to 95 wt % of olefin molecules present in the vent stream; and where the stripper is operative to remove more than 99 wt % of the halogenated by-products present in the solvent; and where the solvent is recycled to the absorber.2. The system of claim 1 , further comprising a heat exchanger that lies downstream of the absorber and upstream of the stripper; where the heat exchanger is operative to transfer heat from a halogen concentrated stream discharged from the absorber to a solvent rich stream discharged from the stripper.3. The system of claim 1 , where the absorber functions at a lower pressure than a pressure in the vent stream.4. The system of claim 1 , further comprising a condenser and a reboiler claim 1 , where the condenser and the reboiler are located downstream of the stripper and are operative to discharge a liquid stream and a gaseous stream respectively to an incinerator; where the liquid stream and the gaseous stream together contain a substantial portion of the halogenated by-products present in the vent stream.5214. The system of claim 1 , where the system is ...

Gas phase polymerization of olefins

A gas phase fluidized bed process is described for producing ethylene polymers having improved processability and an MWD of less than about 2.9. Multiple reactors in series or parallel may be used to produce in-situ blended polymers. Each reactor can separately have a constrained geometry catalyst or a conventional Ziegler-Natta catalyst as needed for obtaining in-situ blended polymer with the desired properties as long as there is a constrained geometry catalyst in at least one reactor. Olefin polymers can be produced according to this invention which have low susceptibility to melt fracture, even under high shear stress conditions.

Gas phase polymerization of olefins

Novel gas phase fluidized bed process for producing ethylene polymers having improved processability. Multiple reactors in series or parallel may be used to produce in-situ blended polymers. Each reactor can separately have a constrained geometry catalyst or a conventional Ziegler-Natta catalyst as needed for obtaining in-situ blended polymer with the desired properties as long as there is a constrained geometry catalyst in at least one reactor. Olefin polymers can be produced according to this invention having low susceptibility to melt fracture, even under high shear stress conditions.

Gas phase polymerization of olefins

System for recovering olefins from a vent stream, process for purifying vent streams and composition

PROCESSO PARA PURIFICAÇÃO DE CORRENTES DE VENTILAÇÃO. É aqui divulgado um sistema para recuperação de olefinas a partir de uma corrente de ventilação compreendendo um absorvedor; e um separador; em que o absorvedor e o separador estão em um ciclo de reciclagem; e em que o absorvedor é operacional para tratar uma corrente de ventilação com um solvente para remover mais de 99% em peso de um subproduto halogenado contido na corrente de ventilação e recuperar 90 a 95% em peso de moléculas de olefina, presentes na corrente de ventilação; e em que o separador é operacional para remover mais de 99% em peso dos subprodutos halogenados presentes no solvente; e em que o solvente é reciclado para o absorvedor. PROCESS FOR PURIFICATION OF VENTILATION CURRENTS. Disclosed herein is a system for recovering olefins from a vent stream comprising an absorber; and a separator; wherein the absorber and separator are in a recycling cycle; and wherein the absorber is operable to treat a vent stream with a solvent to remove more than 99% by weight of a halogenated by-product contained in the vent stream and recover 90 to 95% by weight of olefin molecules present in the vent stream. ventilation; and wherein the separator is operable to remove more than 99% by weight of the halogenated by-products present in the solvent; and wherein the solvent is recycled to the absorber.

Process for gas phase polymerization of olefins

Gas phase polymerization of olefins

Gas phase polymerization of olefins

Novel gas phase fluidized bed process for producing ethylene polymers having improved processability. Multiple reactors in series or parallel may be used to produce in-situ blended polymers. Each reactor can separately have a constrained geometry catalyst or a conventional Ziegler-Natta catalyst as needed for obtaining in-situ blended polymer with the desired properties as long as there is a constrained geometry catalyst in at least one reactor. Olefin polymers can be produced according to this invention having low susceptibility to melt fracture, even under high shear stress conditions.

Finishing design to increase the polymer content in an olefin solution polymerization process

The polymer recovery capacity of solution polymerization units is increased by flashing a polymer solution exiting olefin polymerization reactors to produce a concentrated polymer solution having a reduced temperate and a solids content from 10 percent to 40 percent by weight. Flashing of the polymer solution preferably occurs at a temperature at least 20° C. higher than the crystallization temperature of the concentrated polymer solution The concentrated polymer solution can be prepared adiabatically and can be subsequently finished in conventional polymer recovery units without increasing the risk of gel formation.

Finishing design to increase the polymer content in an olefin solution polymerization process

The polymer recovery capacity of solution polymerization units is increased by flashing a polymer solution exiting olefin polymerization reactors to produce a concentrated polymer solution having a reduced temperature and a solids content from 10 percent to 40 percent by weight. Flashing of the polymer solution preferably occurs at a temperature at least 20 °C higher than the crystallization temperature of the concentrated polymer solution. The concentrated polymer solution can be prepared adiabatically and can be subsequently finished in conventional polymer recovery units without increasing the risk of gel formation.

Gas phase polymerization of olefins

Gas phase polymerization of olefins

Novel gas phase fluidized bed process for producing ethylene polymers having improved processability. Multiple reactors in series or parallel may be used to produce in-situ blended polymers. Each reactor can separately have a constrained geometry catalyst or a conventional Ziegler-Natta catalyst as needed for obtaining in-situ blended polymer with the desired properties as long as there is a constrained geometry catalyst in at least one reactor. Olefin polymers can be produced according to this invention having low susceptibility to melt fracture, even under high shear stress conditions.

Process for purification of vent streams

Disclosed herein is a system for recovering olefins from a vent stream comprising an absorber; and a stripper; where the absorber and the stripper are in a recycle loop; and where the absorber is operative to treat a vent stream with a solvent to remove more than 99 wt % of a halogenated by-product contained in the vent stream and to recover 90 to 95 wt % of olefin molecules present in the vent stream; and where the stripper is operative to remove more than 99 wt % of the halogenated by-products present in the solvent; and where the solvent is recycled to the absorber.

A system and process for the polymerization of olefins

Un sistema de polimerización de olefinas que comprende: (a) uno o más reactores para polimerizar uno o más monómeros de olefina en presencia de uno o más sistemas catalíticos y disolvente para producir una mezcla polímero-disolvente-catalizador; (b) uno o más medios para transportar dicha mezcla polímero-disolvente-catalizador; en donde dicho uno o más medios para transportar dicha mezcla polímero-disolvente-catalizador proporciona además los medios para desactivar dicho catalizador en dicha mezcla polímero-disolvente-catalizador y medios para poner en contacto dicha mezcla polímero-disolvente-catalizador desactivado con un captador de ácido, mediante el cual se forma una mezcla polímero-disolvente-ácido; (c) uno o más medios para calentar dicha mezcla polímero-disolvente-ácido, en donde dicho uno o más medios para calentar está en comunicación con dicho uno o más reactores mediante dicho uno o más medios para transportar dicha mezcla polímero-disolvente-catalizador; (d) medios para transportar dicha mezcla polímero-disolvente-ácido calentada; (e) uno o más medios para eliminar al menos 60 por ciento de dicho disolvente de dicha mezcla polímero-disolvente ácido calentada, por medio del cual se forma una mezcla polímero-disolvente reducido-ácido, y en donde dicho uno o más medios para eliminar al menos 60 por ciento de dicho disolvente está en comunicación con dicho uno o más medios para calentar; (f) uno o más medios para eliminar sustancialmente la parte restante de disolvente y ácido de dicha mezcla polímero-disolvente reducido-ácido, por medio del cual se forma un ácido disolvente, y en donde dicho uno o más medios para eliminar sustancialmente la parte restante de dicho disolvente está en comunicación con dicho uno o más medios para eliminar al menos 60 por ciento de dicho disolvente; (g) uno o más medios para eliminar dicho ácido de la mezcla disolvente-ácido; mediante el cual se forma un disolvente sustancialmente libre de ácido, y en donde dicho uno o más ...

Gas phase polymerization of olefins

Production method for ethylene polymer with a long chain of branching and with improved workability in a fluid bed in gaseous phase, performed in the pressure less than 6890 kPa and under the temperature 0 to 110 C, in at least two reactors connected in series or parallely. Each reactor, individually, can have stereospecific catalyst with coordinated stereospecificity or conventional Ziegler-Natta catalyst necessary to obtain mixed polymer insitu with required characteristics. According to this invention olefin polymers with low receptivity to the fusing refraction can be produced, even under the conditions of high shear stress.

POST-TREATMENT FOR INCREASING POLYMER CONTENT IN A METHOD FOR SOLUTION-POLYMERIZATION OF OLEFINS

Process of olefin polymerization in gaseous phase

Novel gas phase fluidized bed process for producing ethylene polymers having improved processability. Multiple reactors in series or parallel may be used to produce in-situ blended polymers. Each reactor can separately have a constrained geometry catalyst or a conventional Ziegler-Natta catalyst as needed for obtaining in-situ blended polymer with the desired properties as long as there is a constrained geometry catalyst in at least one reactor. Olefin polymers can be produced according to this invention having low susceptibility to melt fracture, even under high shear stress conditions.

Fluidised bed polymerisation of ethylene in the presence of a group iv metal complex catalyst having an anionic aromatic moiety which is activated by various non-alumoxane co-catalysts or by an activating technique

Novel gas phase fluidized bed process for producing ethylene polymers having improved processability. Multiple reactors in series or parallel may be used to produce in-situ blended polymers. Each reactor can separately have a constrained geometry catalyst or a conventional Ziegler-Natta catalyst as needed for obtaining in-situ blended polymer with the desired properties as long as there is a constrained geometry catalyst in at least one reactor. Olefin polymers can be produced according to this invention having low susceptibility to melt fracture, even under high shear stress conditions.

Production method for ethylene polymer with long chain of branching in gaseous phase

Spôsob výroby etylénového polyméru s dlhým reťazcom vetvenia a so zlepšenou spracovateľnosťou vo fluidnom lôžku v plynnej fáze, uskutočňovaný pri tlaku nižšom ako 6890 kPa a pri teplote 0 až 110 °C, v najmenej dvoch reaktoroch, zapojených sériovo alebo paralelne. Každý reaktor, samostatne, môže mať stereošpecifický katalyzátor s koordinovanou stereošpecifitou alebo konvenčný Ziegler-Nattov katalyzátor potrebný na získanie in-situ miešaného polyméra so želanými vlastnosťami. Podľa tohto vynálezu môžu byť vyrobené olefínové polyméry s nízkou vnímavosťou k tavnému lomu, dokonca i za podmienok vysokého namáhania strihom.ŕ A process for the production of a long-branched ethylene polymer with improved gas-phase fluidized-bed processability, carried out at a pressure of less than 6890 kPa and at a temperature of 0 to 110 ° C, in at least two reactors connected in series or in parallel. Each reactor, separately, may have a stereospecific catalyst with coordinated stereospecificity or a conventional Ziegler-Natta catalyst required to obtain an in-situ blended polymer with the desired properties. According to the present invention, olefin polymers can be produced with low susceptibility to melt fracture, even under conditions of high shear stress.

Polymerisation of olefins in gaseous phase

Novel gas phase fluidized bed process for producing ethylene polymers having improved processability. Multiple reactors in series or parallel may be used to produce in-situ blended polymers. Each reactor can separately have a constrained geometry catalyst or a conventional Ziegler-Natta catalyst as needed for obtaining in-situ blended polymer with the desired properties as long as there is a constrained geometry catalyst in at least one reactor. Olefin polymers can be produced according to this invention having low susceptibility to melt fracture, even under high shear stress conditions.

Processo de fase gasosa em leito fluidificado para a produçao de um polímero de etileno

Process for producing polyolefins

Novel gas phase fluidized bed process for producing ethylene polymers having improved processability. Multiple reactors in series or parallel may be used to produce in-situ blended polymers. Each reactor can separately have a constrained geometry catalyst or a conventional Ziegler-Natta catalyst as needed for obtaining in-situ blended polymer with the desired properties as long as there is a constrained geometry catalyst in at least one reactor. Olefin polymers can be produced according to this invention having low susceptibility to melt fracture, even under high shear stress conditions.

Gassfasepolymerisasjon av olefiner

Ny gassfase-virvelsjiktsfremgangs- måte for fremstilling av etylenpolymerer med forbedret bearbeidbarhet. Det kan anvendes multiple reaktorer i serie eller parallelt for fremstilling av in situ-blandede polymerer. Hver reaktor kan separat ha en katalysator med tvun- get geometri eller en vanlig Ziegler- Natta-katalysator etter behov for oppnå- else av polymer blandet in situ med de ønskede egenskaper, så lenge det er en katalysator med tvunget geometri i minst en reaktor. Det kan fremstilles olefin- polymerer ifølge denne oppfinnelse som er lite utsatt for smeltebrudd, selv under betingelser med høy skjærkraft.

Olefiinien kaasufaasipolymerointi

Gas phase fluidized bed process for producing ethylene polymers

In the present invention there is disclosed a gas phase fluidized bed process for producing ethylene polymers exhibiting improved processability. The invented process is carried out under polymerization conditions at which ethylene or ethylene and one copolymerizable alpha-olefin or diolefin are reacted in the presence of a catalyst being characterized by absence of activation amount of aluminoxane and containing a metal complex with activation co-catalyst and a reaction product being obtained by transformation of this complex to the active catalyst. Multiple reactors in series or parallel may be used to produce in-situ blended polymers. Each reactor can separately have a constrained geometry catalyst or a conventional Ziegler-Natta catalyst as needed for obtaining in-situ blended polymer with the desired properties as long as there is a constrained geometry catalyst in at least one reactor. Olefin polymers can be produced according to this invention which have low susceptibility to melt fracture, even under high shear stress conditions.

OLEPHINE GASEOUS POLYMERIZATION.

SE PRESENTAN NUEVOS PROCESOS DE LECHO FLUIDO, DE FASE DE GAS PARA PRODUCIR POLIMEROS SE ETILENO QUE TENGAN UNA PROCESABILIDAD MEJORADA. PUEDEN USARSE REACTORES MULTIPLES EN SERIE O EN PARALELO PARA PRODUCIR POLIMEROS MEZCLADOS IN SITU. CADA REACTOR PUEDE TENER SEPARADAMENTE UN CATALIZADOR DE GEOMETRIA CONSTREÑIDA O UN CATALIZADOR ZIEGLER-NATTA CONVENCIONAL SEGUN SE NECESITE PARA OBTENER EL POLIMERO MEZCLADO IN SITU CON LAS PROPIEDADES DESEADAS TANTO TIEMPO COMO HAYA UN CATALIZADOR DE GEOMETRIA CONSTREÑIDA EN AL MENOS UN REACTOR. DE ACUERDO CON ESTA INVENCION PUEDEN PRODUCIRSE POLIMEROS DE OLEFINA QUE TENGA UNA BAJA SUSCEPTIBILIDAD A LA FRACTURA POR FUSION INCLUSO BAJO CONDICIONES DE FUERZAS DE CORTE ALTAS. NEW GASEOUS FLUID BED PROCESSES ARE PRESENTED TO PRODUCE ETHYLENE POLYMERS THAT HAVE AN IMPROVED PROCESSABILITY. MULTIPLE REACTORS MAY BE USED IN SERIES OR IN PARALLEL TO PRODUCE ON-SITE MIXED POLYMERS. EACH REACTOR MAY SEPARATELY HAVE A CONSTRAINED GEOMETRY CATALYST OR A CONVENTIONAL ZIEGLER-NATTA CATALYST AS NEEDED TO OBTAIN THE POLYMER IN SITU MIXED WITH THE DESIRED PROPERTIES OF ANY CATALYST IN A CATALYST. IN ACCORDANCE WITH THIS INVENTION, OLEPHINE POLYMERS MAY BE PRODUCED WHICH HAVE A LOW SUSCEPTIBILITY TO FUSION FRACTURE EVEN UNDER CONDITIONS OF HIGH CUTTING FORCES.

Eljárások olefinek gázfázisú polimerizálására

A találmány tárgya flűidizált ágyas gázfázisú eljárás etilén pőlimerelőállítására etilén vagy etilén és legalább egy kőpőlimerzálható a-őlefin vagy diőlefin reagáltatásával őlyan katalizátőr alkalmazásával,amely nem tartalmaz aktiváló mennyiségű alűmőxánt, és összetevői: A)(1) általánős képletű fémkőmplex vagy dimerje, a képletben M jelentésetitán a +3 vagy +4 őxidációs állapőtban, L jelentése egy gyűrűs,delőkalizált, arőmás, aniőnős, p-rendszert tartalmazó csőpőrt,előnyösen ciklőpentandienil-, indenil-, flűőrenil-,tetrahidrőindenil-, tetrahidrőflűőrenil- va y őkahidrőflűőrenil-csőpőrt és inerten helyettesített származékaik, amelyen át az L-csőpőrt az M-helyettesítőhöz kötődik, és amely L-csőpőrt űgyancsakkötődik a Z-helyettesítőhöz, Z jelentése egy mind az L-, mind az Y-helyettesítőhöz kővalensen kapcsőlódó, brómatőmőt vagy egy, aperiódűsős rendszer 14. csőpőrtjába tartőzó elemet tartamazó csőpőrt,Y jelentése egy nitrőgén-, főszfőr-, kén- vagy őxigénatőmőttartalmazó, ezen át mind a Z-, mind az M-helyettesítőhöz kővalensenkötött csőpőrt, X' jelentése egymástól függetlenül főszfin-, főszfit-,éter-, aminő-, szén-mőnőxid-csőpőrt, vagy a periódűsős rendszer I vagyII csőpőrtjába tartőzó fém sója, vagy kettő vagy több ilyen csőpőrtkever ke, X jelentése egymástól függetlenül egy 1–20 szénatőmősszénhidrőgéncsőpőrt, vagy ha n=2, a két X-csőpőrt alkőt egyszénhidrőgéncsőpőrtőt, q értéke egy 0 és 1 közötti szám, és n értéke 1vagy 2 az M-helyettesítő őxidációs állapőtától függően; és B) egyaktiváló kőkatalizátőr, amely lehet (i) egy 1–30 szénatőmősszénhidrőgéncsőpőrttal helyettesített bőrán vagy halőgénezettszármazéka, tővábbá (ii) egy[L*–H]+[BQ4]– általánős képletű bőrát – a képletben L* jelentése egyneűtrális Lewis-bázis,[L*–H]+ jelentése egy Brőnsted-sav, B egy 3vegyértékállapőtú bóriőn, és Q jelentése szénhidrőgén-, szénhidrőgén-őxi-, flűőrőzőttszénhidrőgén-, flűőrőzőtt szénhidrőgén-őxi- vagy flűőrőzőtt szilil-szénhidrőgén-csőpőrt, azzal a megkötéssel, hőgy Q legfeljebb ...

Polimerizacao de olefinas em fase gasosa

Gas phase polymerization of olefins

Polymerisation of olefins in gaseous phase

Gas phase polymerization of olefins

Novel gas phase fluidized bed process for producing ethylene polymers having improved processability. Multiple reactors in series or parallel may be used to produce in-situ blended polymers. Each reactor can separately have a constrained geometry catalyst or a conventional Ziegler-Natta catalyst as needed for obtaining in-situ blended polymer with the desired properties as long as there is a constrained geometry catalyst in at least one reactor. Olefin polymers can be produced according to this invention having low susceptibility to melt fracture, even under high shear stress conditions.

Gas phase polymerization of olefins

Gas phase polymerization of olefins

Polymerization process for olefin-based polymers

The invention provides a solution polymerization process comprising: A) polymerizing one or more monomers in the presence of a solvent that comprises a heavy hydrocarbon solvent and a light hydrocarbon solvent, to form a polymer solution; B) transferring the polymer solution to a Liquid-Liquid Separator, without adding heat to the solution, and wherein the pressure of the polymer solution is actively reduced in a controlled manner prior to, or within, the Liquid-Liquid Separator, to induce at least two liquid phases, a polymer-rich phase and a solvent-rich phase, and wherein the concentration of polymer in the polymer-rich phase is higher than that in the polymer solution transferred to the Liquid-Liquid Separator; and C) removing the solvent-rich phase.

Finishing design to increase the polymer content in an olefin solution polymerization process

Projeto de finalização para aumentar o conteúdo de polìmero em um processo de polimerização em solução olefinica.

"PROJETOS DE FINALIZAçãO PARA AUMENTAR O CONTEúDO DE POLìMERO EM UM PROCESSO DE POLIMERIZAçãO EM SOLUçãO OLEFìNICA". A capacidade de recuperação de polímeros de unidades de polimerização em solução é aumentada fazendo flasheamento uma solução polimérica que sai de reatores de polimerização olefínica para produzir uma solução polimérica concentrada tendo temperatura reduzida e conteúdo de sólidos entre 10% e 40% em peso. O flasheamento da solução polimérica preferivelmente ocorre em temperaturas pelo menos 20°C maiores que a temperatura de cristalização da solução polimérica concentrada. A solução polimérica concentrada pode ser preparada adiabaticamente e pode ser subseq³entemente finalizada em unidades convencionais de recuperação sem aumentar o risco de formação de gel.

Finishing design to increase the polymer content in an olefin solution polymerization process

The polymer recovery capacity of solution polymerization units is increased by flashing a polymer solution exiting olefin polymerization reactors to produce a concentrated polymer solution having a reduced temperature and a solids content from 10 percent to 40 percent by weight. Flashing of the polymer solution preferably occurs at a temperature at least 20 °C higher than the crystallization temperature of the concentrated polymer solution. The concentrated polymer solution can be prepared adiabatically and can be subsequently finished in conventional polymer recovery units without increasing the risk of gel formation.

Sluttbehandlingsdesign for øking av polymerinnholdet i en olefin-løsnings-polymerisasjonsprosess

Method and system for polymer production

Disclosed herein is a system for solution polymerization comprising a reactor system that is operative to receive a monomer and to react the monomer to form a polymer; a plurality of devolatilization vessels located downstream of the reactor system, where each devolatilization vessel operates at a lower pressure than the preceding devolatilization vessel; and a heat exchanger disposed between two devolatilization vessels and in fluid communication with them, where the heat exchanger has an inlet port temperature of 100°C to 230°C, an outlet port temperature of 200°C to 300°C, an inlet port pressure of 35 to 250 kgf/cm 2 and an outlet port pressure of 20 to 200 kgf/cm 2 ; and wherein the polymer solution remains in a single phase during its residence in the heat exchanger.

Apretur design for increasing the polymer content of a polymerization process in an olefin solution

Finishing design to increase the polymer content in an olefin solution polymerization process

The polymer recovery capacity of solution polymerization units is increased by flashing a polymer solution exiting olefin polymerization reactors to produce a concentrated polymer solution having a reduced temperature and a solids content from 10 percent to 40 percent by weight. Flashing of the polymer solution preferably occurs at a temperature at least 20 °C higher than the crystallization temperature of the concentrated polymer solution. The concentrated polymer solution can be prepared adiabatically and can be subsequently finished in conventional polymer recovery units without increasing the risk of gel formation.

Finishing design to increase the polymer content in an olefin solution polymerization process

The polymer recovery capacity of solution polymerization units is increased by flashing a polymer solution exiting olefin polymerization reactors to produce a concentrated polymer solution having a reduced temperature and a solids content from 10 percent to 40 percent by weight. Flashing of the polymer solution preferably occurs at a temperature at least 20 °C higher than the crystallization temperature of the concentrated polymer solution. The concentrated polymer solution can be prepared adiabatically and can be subsequently finished in conventional polymer recovery units without increasing the risk of gel formation.

Method and system for polymer production

Disclosed herein is a system for solution polymerization comprising a reactor system that is operative to receive a monomer and to react the monomer to form a polymer; a plurality of devolatilization vessels located downstream of the reactor system, where each devolatilization vessel operates at a lower pressure than the preceding devolatilization vessel; and a heat exchanger disposed between two devolatilization vessels and in fluid communication with them, where the heat exchanger has an inlet port temperature of 100°C to 230°C, an outlet port temperature of 200°C to 300°C, an inlet port pressure of 35 to 250 kgf/cm 2 and an outlet port pressure of 20 to 200 kgf/cm 2 ; and wherein the polymer solution remains in a single phase during its residence in the heat exchanger.

System and process for olefin polymerization

The present invention provides a system and process for olefin polymerization. The inventive system and process for olefin polymerization facilitate lower operating vacuum pressures in the polymer recovery system by requiring at least two sequential condensing units, wherein at least one of the condensing units operates at significantly lower temperature ranges than the temperature ranges at which the current systems operate.

Gas phase polymerization of olefins

Novel gas phase fluidized bed process for producing ethylene polymers having improved processability. Multiple reactors in series or parallel may be used to produce in-situ blended polymers. Each reactor can separately have a constrained geometry catalyst or a conventional Ziegler-Natta catalyst as needed for obtaining in-situ blended polymer with the desired properties as long as there is a constrained geometry catalyst in at least one reactor. Olefin polymers can be produced according to this invention having low susceptibility to melt fracture, even under high shear stress conditions.

Nachbehandlung zur erhöhung des polymergehaltes in einem verfahren zur lösungspolymerisation von olefinen

Sistema para polimerização em solução, e, método

trata-se de um sistema para polimerização em solução que compreende um sistema de reator que é operacional para receber um monômero e reagir com o monômero para formar um polímero; uma pluralidade de recipientes de desvolatilização localizados a jusante do sistema de reator, em que cada recipiente de desvolatilização opera a uma pressão mais baixa que o recipiente de desvolatilização anterior; e um trocador de calor disposto entre dois recipientes de desvolatilização e em comunicação fluídica com os mesmos, em que o trocador de calor tem uma temperatura de porta de entrada de 100 ºc a 230 ºc, uma temperatura de porta de saída de 200 ºc a 300 ºc, uma pressão de porta de entrada de 3,43 a 24,52 mpa (35 a 250 kgf/cm²) e uma pressão de porta de saída de 1,96 a 19,61 mpa (20 a 200 kgf/cm²); e em que a solução de polímero permanece em uma única fase durante a permanência da mesma no trocador de calor.

Olefinpolymerisation in der gasphase