Process for introducing a solid catalyst into a gas-phase olefin polymerization reactor

The present invention relates to a process for introducing a solid catalyst into a gas-phase olefin polymerization reactor (10). It comprises in particular storing the catalyst in the form of a dry powder in a hopper (1), withdrawing from the hopper (1) a measured amount of the said catalyst, introducing the said amount of the catalyst and a liquid hydrocarbon into a mixing chamber (7), mixing the said catalyst with the said liquid hydrocarbon so as to form in the said chamber (7) a suspension of the entrained catalyst with the said liquid hydrocarbon, and introducing the said suspension into the said reactor (10). In a preferred form, the liquid hydrocarbon is continuously introduced into the chamber (7) and forms a continuous stream to which is added the measured amount of the catalyst and which flows into the reactor (10).

Gas phase polymerisation process

The present invention relates to a continuous process for the polymerization of an alpha-olefin having from 2 to 12 carbon atoms, which is carried out in a gas phase polymerization reactor by bringing a gaseous reaction mixture, containing the alpha-olefin to be polymerized, into contact with a catalyst system of the Ziegler-Natta type consisting of a solid catalyst comprising at least one compound of a transition metal belonging to groups IV, V or VI of the Periodic Table, of the elements, and of a cocatalyst comprising at least one organometallic compound of a metal belonging to groups II or III of the Periodic Table in which the polymerization reactor is fed with alpha-olefin at a constant rate.

Process for starting up the polymerisation of ethylene or copolymerisation of ethylene and at least one other alpha-olefin in the gas phase in the presence of a catalyst based on chromium oxide

Gas phase polymerisation process

The present invention relates to a continuous process for the polymerization of an alpha-olefin having from 2 to 12 carbon atoms, which is carried out in a gas phase polymerization reactor by bringing a gaseous reaction mixture, containing the alpha-olefin to be polymerized, into contact with a catalyst system of the Ziegler-Natta type consisting of a solid catalyst comprising at least one compound of a transition metal belonging to groups IV, V or VI of the Periodic Table, of the elements, and of a cocatalyst comprising at least one organometallic compound of a metal belonging to groups II or III of the Periodic Table in which the polymerization reactor is fed with alpha-olefin at a constant rate.

Polymerisation control process

Polymerization control process

The present invention relates to a continuous process for controlling the gas-phase co-polymerisation of olefins in a fluidised bed reactor. The present invention further relates to a method for the continuous gas-phase (co-)polymerisation of olefins in a fluidised bed reactor in the presence of a polymerisation catalyst wherein the density of the polymer powder particles leaving the reactor is maintained constant by controlling the particle size distribution of the polymerisation catalyst. The present invention also relates to a process for controlling the particle size distribution of a polymerisation catalyst in order to achieve the production of a polymer powder of constant density during the continuous gas-phase (co-)polymerisation of olefins in a fluidised bed reactor.

Gas phase polymerization process

The present invention relates to a process for preventing polymeragglomeration and for controlling the density of copolymer produced by an alpha-olefin copolymerization process in a polymerizationreactor, wherein the ratio of the flow rates of introduction of the comonomer(s) to the monomer is kept constant.

Process for the start up of polymerisation or copolymerisation in the gas phase of alpha-olefins in the presence of a ziegler-natta catalyst system

Gas phase polymerisation process

Process for improving flowability of olefins during gas-phase (co-)polymerisation in a fluidised bed reactor incorporating process aid additives

The present invention relates to a process for the gas-phase (co-)polymerisation of olefins in a fluidised bed reactor using a metallocene catalyst characterised in that the polymerisation is performed in the presence of a process aid additive.

Polymerisation control process

The present invention relates to a continuous process for controlling the gas-phase co-polymerisation of olefins in a fluidised bed reactor. The present invention further relates to a method for the continuous gas-phase (co-)polymerisation of olefins in a fluidised bed reactor in the presence of a polymerisation catalyst wherein the density of the polymer powder particles leaving the reactor is maintained constant by controlling the particle size distribution of the polymerisation catalyst. The present invention also relates to a process for controlling the particle size distribution of a polymerisation catalyst in order to achieve the production of a polymer powder of constant density during the continuous gas-phase (co-)polymerisation of olefins in a fluidised bed reactor.

Process for introducing a solid catalyst into a fluidised or agitated vessel

The present invention relates to a process for introducing a solid catalyst particle feed into a fluidised or agitated vessel (14) utilising a feed delivery device (1), a vertical feed dilution pipe (3) and a feed injection pipe (6) connected to the vessel (14), said process comprising the steps of: (a) introducing the solid catalyst particles feed from the feed delivery device (1) into the vertical feed dilution pipe (3), (b) diluting the solid catalyst particles feed by letting the solid particle reaching by gravity their terminal velocity in the feed dilution pipe (3), (c) introducing the diluted solid catalyst particles feed into the injection pipe (6) and mixing it with conveying gas, and introducing said gas conveyed diluted solid catalyst particles feed into the vessel (14). The present invention relates to a process for introducing a solid catalyst particle feed into a fluidised or agitated vessel (14) utilising a feed delivery device (1), a vertical feed dilution pipe (3) and a feed injection pipe (6) connected to the vessel (14), said process comprising the steps of: (a) introducing the solid catalyst particles feed from the feed delivery device (1) into the vertical feed dilution pipe (3), (b) diluting the solid catalyst feed by letting the solid particle reaching by gravity their terminal velocity in the feed dilution pipe (3), (c) introducing the diluted solid catalyst particles feed into the injection pipe (6) and mixing it with a conveying gas, and introducing said gas conveyed diluted solid catalyst particles feed into the vessel (14).

Process for the gas-phase (co-)polymerisation of olefins in a fluidised bed reactor

The present invention relates to a process for the gas-phase (co-)polymerisation of olefins in a fluidised bed reactor using a metallocene catalyst characterised in that the polymerisation is performed in the presence of a process aid additive.

Process for a gas phase olefin polymerization

The present invention relates to a process for introducing a solid catalyst into a gas-phase olefin polymerization reactor. It comprises in particular storing the catalyst in the form of a dry powder in a hopper, withdrawing from the hopper a measured amount of the said catalyst, introducing the said amount of the catalyst and a liquid hydrocarbon into a mixing chamber, mixing the said catalyst with the said liquid hydrocarbon so as to form in the said chamber a suspension of the entrained catalyst with the said liquid hydrocarbon, and introducing the said suspension into the said reactor. In a preferred form, the liquid hydrocarbon is continuously introduced into the chamber and forms a continuous stream to which is added the measured amount of the catalyst and which flows into the reactor.

Process for the gas-phase (co)-polymerization of olefins in a fluidized bed reactor

A process for the gas-phase (co-)polymerization of olefins in a fluidized bed reactor using a metallocene catalyst in that the polymerization is preformed in the presence of a process aid additive selected from at least one of 1) a polysulfone copolymer, 2) a polymeric polyamine, or 3) an oil-soluble sulfonic acid.

Process for the gas-phase (co-)polymerisation of olefins in a fluidised bed reactor

Gas phase polymerization process

The present invention relates to a process for continuous gas phase polymerization of olefin(s) in a reactor containing a fluidized bed, consisting of a cylinder with a vertical side wall and of a desurging or disengagement chamber mounted above the said cylinder, characterized in that the fluidized bed occupies at least all of the cylinder with a vertical side wall of the reactor.

Gas phase polymerization process

Gas phase polymerization process

The present invention relates to a process for preventing polymeragglomeration and for controlling the density of copolymer produced by an alpha-olefin copolymerization process in a polymerizationreactor, wherein the ratio of the flow rates of introduction of the comonomer(s) to the monomer is kept constant.

Gas phase polymerization process

A process for preventing polymeragglomeration and for controlling the density of copolymer produced by an alpha-olefin copolymerization process in a polymerization reactor, wherein the ratio of the flow rates of introduction of the comonomer(s) to the monomer is kept constant.

Process for a gas phase olefin polymerization

THE PRESENT INVENTION RELATES TO A PROCESS FOR INTRODUCING A SOLID CATALYST INTO A GAS-PHASE OLEFIN POLYMERIZATION REACTOR. IT COMPRISES IN PARTICULAR STORING THE CATALYST IN THE FORM OF A DRY POWDER IN A HOPPER, WITHDRAWING FROM THE HOPPER A MEASURED AMOUNT OF THE SAID CATALYST, INTRODUCING THE SAID AMOUNT OF THE CATALYST AND A LIQUID HYDROCARBON INTO A MIXING CHAMBER, MIXING THE SAID CATALYST WITH THE SAID LIQUID HYDROCARBON SO AS TO FORM IN THE SAID CHAMBER A SUSPENSION OF THE ENTRAINED CATALYST WITH THE SAID LIQUID HYDROCARBON, AND INTRODUCING THE SAID SUSPENSION INTO THE SAID REACTOR. IN A PREFERRED FORM, THE LIQUID HYDROCARBON IS CONTINUOUSLY INTRODUCED INTO THE CHAMBER AND FORMS A CONTINUOUS STREAM TO WHICH IS ADDED THE MEASURED AMOUNT OF THE CATALYST AND WHICH FLOWS INTO THE REACTOR.(FIG. 7)

Process for the gas-phase (co-)polymerisation of olefins in a fluidised bed reactor

Polymerisation of olefins using a ziegler-natta catalyst and two organometallic compounds

The detection of anomolies in gas fluidised bed polymerisation

The detection of anomolies in gas fluidised bed polymerisation

A process for detecting anomalies in a fluidised bed, e.g. the incidence of agglomeration in gas-fluidised bed polymerisation, comprises sensing and converting into electrical signals the pressure at one level, or the pressure difference between two or more levels in the reactor, processing these signals by computor to produce a pressure spectrum and comparing with a reference spectrum obtained in the absence of anomalies. The device comprises one or more pressure sensors 11, 12, 13, which measure the pressure at various levels in the reactor 1, and a computor 27.

Gas phase polymerization process

The present invention relates to a process for preventing polymeragglomeration and for controlling the density of copolymer produced by an alpha-olefin copolymerization process in a polymerizationreactor, wherein the ratio of the flow rates of introduction of the comonomer(s) to the monomer is kept constant.

Polymerisation of olefins using a ziegler-natta catalyst and two organometallic compounds

Polymerisation of olefins using a ziegler-natta catalyst and two organometallic compounds

ABSTRACT OF THE DISCLOSURE POLYMERISATION OF OLEFINS USING A ZIEGLER-NATTA CATALYST AND TWO ORGANOMETALLIC COMPOUNDS The present invention relates to a process for the polymerisation of alpha-olefins in the gas phase in the presence of a Ziegler-Natta catalyst system consisting of a catalyst comprising atoms of halogen, magnesium and a transition metal, and cocatalysts based on an organometallic compound of a metal of Groups II or III of the Periodic Table of Elements, this catalyst supported on a granular substance. This process is characterised in that the polymerisation in the gas phase is carried out by contacting one or more alpha-olefins, on the one hand with the prepolymer or the supported catalyst system comprising an organometallic compound (a) which is only slightly volatile as cocatalyst, and on the other hand another cocatalyst consisting of an organometallic compound (b) which is relatively volatile, in such a way that the total quantity of cocatalyst employed is relatively small.

Polymerisation of olefins using a ziegler-natta catalyst and two organometallic compounds

THE PRESENT INVENTION RELATES TO A PROCESS OF THE POLYMERISATION OF ALPHA-OLEFINS IN THE GAS PHASE IN THE PRESENCE OF A ZIEGLER-NATTA CATALYST SYSTEM CONSISTING OF A CATALYST COMPRISING ATOMS OF HALOGEN, MAGNESIUM AND A TRANSITION METAL, AND COCATALYSTS BASED ON AN ORGANOMETALLIC COMPOUND OF A METAL OF GROUPS II OR III OF THE PERIODIC TABLE OF ELEMENTS, THIS CATALYST SYSTEM BEING PREVIOUSLY CONVERTED INTO A PREPOLYMER OR A CATALYST SUPPORTED ON A GRANULAR SUBSTANCE. THIS PROCESS IS CHARACTERISED IN THAT THE POLYMERISATION IN THE GAS PHASE IS CARRIED OUT BY CONTACTING ONE OR MORE ALPHA-OLEFINS, ON THE ONE HAND WITH THE PREPOLYMER OR THE SUPPORTED CATALYST SYSTEM COMPRISING AN ORGANOMETALLIC COMPOUND (A) WHICH IS ONLY SLIGHTLY VOLATILE AS COCATALYST, AND ON THE OTHER HAND ANOTHER COCATALYST CONSISTING OF AN ORGANOMETALLIC COMPOUND (B) WHICH IS RELATIVELY VOLATILE, IN SUCH A WAY THAT THE TOTAL QUANTITY OF COCATALYST EMPLOYED IS RELATIVELY SMALL.

Polymerisation of olefins using a Ziegler-Natta catalyst and two organometallic compounds

The present invention relates to a process for the polymerisation of alpha-olefins in the gas phase in the presence of a Ziegler-Natta catalyst system consisting of a catalyst comprising atoms of halogen, magnesium and a transition metal, and cocatalysts based on an organometallic compound of a metal of Groups II or III of the Periodic Table of Elements, this catalyst system being previously converted into a prepolymer or a catalyst supported on a granular substance. This process is characterised in that the polymerisation in the gas phase is carried out by contacting one or more alpha-olefins, on the one hand with the prepolymer or the supported catalyst system comprising an organometallic compound (a) which is only slightly volatile as cocatalyst, and on the other hand another cocatalyst consisting of an organometallic compound (b) which is relatively volatile, in such a way that the total quantity of cocatalyst employed is relatively small.

Continuos process of alpha-olefin polymerization

The proposed continuos polymerization process of alpha-olefin having 2 to 12 carbon atoms, being carried out in a polymerization reactor in gaseous phase thereof is characterized in that a gaseous reaction mixture containing alpha-olefin to be polymerized is brought into contact with a catalytic system of Ziegler-Natt type that consists of a solid catalyst containing at least one compound of a transient metal and coming under the group IV, V or VI of the Periodic Table of Elements and a co-catalyst containing at least one organometallic compound belonging to the group II or III of the Periodic Table of Elements. When employing this process the alpha-olefin to be polymerized is introduced into the polymerization reactor at constant rate.

Fremgangsmaate for gassfasepolymerisasjon av et alfa-olefin

PROCESS FOR GAS PHASE POLYMERIZATION OF AN ALFA OLEFINE

PROCESS FOR THE START UP OF POLYMERISATION OR COPOLYMERISATION IN THE GAS PHASE OF .alpha.-OLEFINS IN THE PRESENCE OF A ZIEGLER-NATTA CATALYST SYSTEM

ABSTRACT OF THE DISCLOSURE PROCESS FOR THE START UP OF POLYMERISATION OR COPOLYMERISATION IN THE GAS PHASE OF ALPHA-OLEFINS IN THE PRESENCE OF A ZIEGLER-NATTA CATALYST SYSTEM The present invention relates to a process for the start up of polymerisation or copolymerisation in the gas phase by bringing the said alpha-olefins in contact under polymerisation or copolymerisation conditions in a fluidised bed and/or with mechanical stirring with a charge powder, in the presence of a catalyst system of the Ziegler-Natta type, this process being characterised in that the charge powder used is previously dehydrated and subjected to a treatment by bringing the said charge powder into contact with an organoaluminum compound for a period of at least five minutes, so that the polymerisation or copolymerisation starts up immediately after the contracting of the alpha-olefins with the charge powder in the presence of the catalyst system.

Process for the start up of polymerisation or copolymerisation in the gas phase of alpha-olefins in the presence of a Ziegler-Natta catalyst system

@ The present invention relates to a process for the start up of polymerisation or copolymerisation in the gas phase by bringing the said alpha-olefins in contact under polymerisation or copolymerisation conditions in a fluidised bed and/or with mechanical stirring with a charge powder, in the presence of a catalyst system of the Ziegler-Natta type, this process being characterised in that the charge powder used is previously dehydrated and subjected to a treatment by bringing the said charge powder into contact with an organoaluminium compound for a period of at least five minutes, so that the polymerisation or copolymerisation starts up immediately after the contacting of the alpha-olefins with the charge powder in the presence of the catalyst system.

Gas phase polymerization process

The present invention relates to a process for continuous gas phase polymerization of olefin(s) in a reactor containing a fluidized bed, consisting of a cylinder with a vertical side wall and of a desurging or disengagement chamber ( 3 ) mounted above the said cylinder, characterized in that the fluidized bed occupies at least all of the cylinder with a vertical side wall of the reactor.

Polymerisation control process

The present invention relates to a process for controlling the gas-phase co-polymerisation of olefins in a fluidised bed reactor. The present invention further relates to a method for the continuous gas-phase (co-)polymerisation of olefins in a fluidised bed reactor in the presence of a polymerisation catalyst wherein the density SPAN of the polymer powder particles leaving the reactor is maintained below certain values throughout the polymerisation.

Polymerisation control process

Způsob polymerace v plynné fázi

Způsob polymerace olefinů v plynné fázi ve fluidním loži uspořádaném v reaktorové zóně tvořené prvním válcovitým objemem a nad ním uspořádaným druhým, kuželovitě se rozšiřujícím objemem je charakteristický tím, že se výška fluidního lože reguluje tak, že fluidní lože zaujímá alespoň celý první válcovitý objem reaktorové zóny. Dále se týká způsobu kontinuální polymerace alespoň jednoho olefinu v plynné fázi.ŕ

Gas phase polymerization process

A process for gas phase polymerization in a fluidized-bed reactor consisting of a cylinder with a vertical axis above which is mounted a disengagement vessel, adjoining the cylinder, the wall of which consists of at least one surface of revolution generated by the rotation, about the same vertical axis known as axis of revolution, of a rectilinear and/or curved segment, characterized in that the height of the fluidized bed (h) is greater than 1.05 x H, where H is the length of the vertical side wall of the cylinder rising above the base of the fluidized bed, a base which coincides with a fluidization grid.

Gas phase polymerization process

The present invention relates to a process for continuous gas phase polymerization of olefin(s) in a reactor containing a fluidized bed, consisting of a cylinder with a vertical side wall and of a desurging or disengagement chamber (3) mounted above the said cylinder, characterized in that the fluidized bed occupies at least all of the cylinder with a vertical side wall of the reactor.

Gas phase polymerization method.

Bu bulus, olefinin (olefinlerin), bir akicilastirilmis tabaka içeren, düsey bir yan cidara sahip bir silindirden ve bu silindirin yukarisina monte edilmis olan bir kabarma veya tasmayi giderme yahut saliverme hücresinden (3) meydana gelen bir reaktör içinde sürekli gaz fazi polimerizasyonu için bir yöntemle ilgili olup, bu yöntemin özelligi, akicilastirilmis tabakanin, en azindan, reaktörün düsey bir yan cidarini haiz olan silindirin tamamini kaplamasidir. The present invention is a method for the continuous gas phase polymerization of olefin (olefins) in a reactor comprising a fluidized layer, with a cylinder having a vertical side wall and a swelling or transport that is mounted above this cylinder, or a release cell (3). The feature of this method is that the fluidized layer covers at least the entire cylinder having a vertical side wall of the reactor.

Gas phase polymerization process

THE PRESENT INVENTION RELATES TO A PROCESS FOR CONTINUOUS GAS PHASE POLYMERIZATION OF OLEFIN(S) IN A REACTOR CONTAINING A FLUIDIZED BED, CONSISTING OF A CYLINDER WITH A VERTICAL SIDE WALL AND OF A DESURGING OR DISENGAGEMENT CHAMBER (3) MOUNTED ABOVE THE SAID CYLINDER1 CHARACTERIZED IN THAT THE ILUIDIZED BED OCCUPIES AT LEAST ALL OF THE CYLINDER WITH A VERTICAL SIDE WALL OF THE REACTOR.

Process for polymerization in gaseous phase

The invention relates to a process for polymerization, in gaseous phase, of one/some olefines. According to the invention, the process is carried out in a fluidized bed reactor, consisting of a first cylindric volume, whose enclosure or wall has at least a rotation surface generated by the rotation around a vertical axis as rotation axis, of a curve and/or rectilinear segment above which there is installed a second volume consisting of a separation tank placed above the cylinder at an absolute pressure higher than the atmospheric pressure. The separation tank is close to the first volume, whose enclosure or wall has alsoat least one rotation surface generated by the rotation around the same vertical axis, known as rotation axis, of a curve and/or rectilinear segment, which is carried out by continuously or intermitently introducing a catalyst into the reactor, continuously introducing olefin/olefins into a reaction gaseous mixture. The reaction gaseous mixture cooling takes place with the elimination of the formed polymer and the fluidized bed occupies at least the entire volume of the reactor. By the process claimed by the invention, one or more olefin monomers are polymerized, said monomers being chosen among ethylene, propylene, 1-butene, 1-pentene, 4-methyl-1-pentene, 1-hexene and 1-octene, with a productivity higher than 50 kg/m3, preferably higher than 60 kg/h/m3.

Gaseous phase polymerisation process

The present invention relates to a process for continuous gas phase polymerization of olefin(s) in a reactor containing a fluidized bed, consisting of a cylinder with a vertical side wall and of a desurging or disengagement chamber (3) mounted above the said cylinder, characterized in that the fluidized bed occupies at least all of the cylinder with a vertical side wall of the reactor. <IMAGE>

Gázfázisú polimerizációs eljárás

A találmány tárgya gázfázisú pőlimerizálási eljárás, örvényágyasreaktőrban, amelynek van egy első, henger alakú térfőgata, ami föléegy - elválasztó edénynek nevezett - másődik térfőgat van szerelve,ahől az örvényágy legalábbis a reaktőr teljes első térfőgatátelfőglalja. Az eljárás sőrán egy vagy több őlefin mőnőmert, mintetilént, prőpilént, 1-bűtént, 1-pentént, 4-metil-pentént, 1-hexéntvagy 1-őktént pőlimerizálnak. ŕ

Gaseous phase polymerization process

The present invention relates to a process for continuous gas phase polymerization of olefin(s) in a reactor containing a fluidized bed, consisting of a cylinder with a vertical side wall and of a desurging or disengagement chamber (3) mounted above the said cylinder, characterized in that the fluidized bed occupies at least all of the cylinder with a vertical side wall of the reactor. <IMAGE>

Gas phase polymerization process

The present invention relates to a process for continuous gas phase polymerization of olefin(s) in a reactor containing a fluidized bed, consisting of a cylinder with a vertical side wall and of a desurging or disengagement chamber (3) mounted above the said cylinder, characterized in that the fluidized bed occupies at least all of the cylinder with a vertical side wall of the reactor.

Process for starting up the polymerisation of ethylene or copolymerisation of ethylene and at least one other alpha-olefin in the gas phase in the presence of a catalyst based on chromium oxide

The present invention relates to a process for starting up the polymerisation of ethylene or copolymerisation of ethylene and at least one other alpha-olefin by bringing ethylene and optionally at least one other alpha-olefin in contact under fluidised-bed polymerisation or copolymerisation conditions and/or stirred mechanically, with a charge powder in the presence of a catalyst comprising a chromium oxide compound associated with a granular support and activated by thermal treatment, this catalyst being used in the form of a prepolymer, this process being characterised in that the charge powder employed is previously subjected to a treatment by contacting the said charge powder with an organo-aluminium compound, in such a way that the polymerisation or copolymerisation starts up immediately after the contacting of the ethylene and optionally one other alpha-olefin with the charge powder in the presence of the prepolymer.

PROCESS FOR STARTING UP THE POLYMERISATION OF ETHYLENE OR COPOLYMERISATION OF ETHYLENE AND AT LEAST ONE OTHER .alpha.-OLEFIN IN THE GAS PHASE IN THE PRESENCE OF A CATALYST BASEDON CHROMIUM OXIDE

ABSTRACT OF THE DISCLOSURE PROCESS FOR STARTING UP THE POLYMERISATION OF ETHYLENE OR COPOLYMERISATION OF ETHYLENE AND AT LEAST ONE OTHER ALPHA-OLEFIN IN THE GAS PHASE IN THE PRESENCE OF A CATALYST BASED ON CHROMIUM OXIDE The present invention relates to a process for starting up the polymerisation of ethylene or copolymerisation of ethylene and at least one other alpha-olefin by bringing ethylene and optionally at least one other alpha-olefin in contact under fluidised-bed polymerisation or copolymerisation conditions and/or stirred mechanically, with a charge powder in the presence of a catalyst comprising a chromium oxide compound associated with a granular support and activated by thermal treatment, this catalyst being used in the form of a prepolymer, this process being characterised in that the charge powder employed is previously subjected to a treatment by contacting the said charge powder with an organo-aluminium compound, in such a way that the polymerisation or copolymerisation starts up immediately after the contacting of the ethylene and optionally one other alpha-olefin with the charge powder in the presence of the prepolymer.

Polymerisation control process

The present invention relates to a process for controlling the gas-phase co-polymerisation of olefins in a fluidised bed reactor. The present invention further relates to a method for the continuous gas-phase (co-)polymerisation of olefins in a fluidised bed reactor in the presence of a polymerisation catalyst wherein the density SPAN of the polymer powder particles leaving the reactor is maintained below certain values throughout the polymerisation.

Process and apparatus for gas phase polymerisation of olefins in a fluidized bed reactor

A process for polymerizing olefins in a gas-phase fluidized-bed reactor comprising a reactor body (1), optionally surmounted by a disengagement chamber (2), in which fine particles entrained by the gas mixture leaving the top of the reactor are separated from the gas and recycled to the upper portion of the reactor body. Polymer is withdrawn from the reactor body (1) via at least two polymer outlets, at least one of which (15) is in the lower portion of the reactor body (1) and at least one of which (16) is in the upper portion of the reactor body at a position below the top of the fluidized bed. The invention includes apparatus for polymerizing olefins and the use of the apparatus.

gas-phase polymerization

PROCESS FOR POLYMERIZATION CONTROL

Polymerisation control process

POLYMERIZATION CONTROL PROCEDURE.

Procedimiento para controlar un procedimiento de (co)polimerización en reactor de lecho fluidizado continuo que comprende: (i) extraer del reactor una corriente de reciclado caliente que comprende un monómero principal y al menos otro reaccionante sin reaccionar, (ii) enfriar parte o la totalidad de dicha corriente de reciclado extraída de dicho reactor, y (iii) reciclar parte o la totalidad de dicha corriente de reciclado enfriada que comprende el monómero principal y el reaccionante o los reaccionantes sin reaccionar a través de la zona de polimerización de dicho reactor en presencia de un catalizador de polimerización bajo condiciones reactivas, caracterizado porque dicho procedimiento de control consiste en controlar el intervalo de densidad de las partículas de polvo de polímero, de modo que el intervalo de densidad de las partículas de polvo de polímero se mantenga por debajo de 0, 0028, en donde el intervalo de densidad de las partículas de polvo de polímero significa el valor absoluto de la diferencia de densidad en g/cm3 entre la densidad media del material con un tamaño de partícula por encima del X% de volumen acumulativo del volumen/la distribución del tamaño de partícula de las partículas de polímero (agregado) que salen del reactor y la densidad media de la totalidad de dichas partículas de polímero (agregado) que salen del reactor, estando X comprendido entre 80 y 99. Process for controlling a process of (co) polymerization in a continuous fluidized bed reactor comprising: (i) extracting from the reactor a hot recycle stream comprising a main monomer and at least one other unreacted reactant, (ii) cooling part or the all of said recycle stream extracted from said reactor, and (iii) recycle part or all of said cooled recycle stream comprising the main monomer and the reactant or unreacted reactants through the polymerization zone of said reactor in presence of a polymerization catalyst under reactive conditions, characterized in that said control ...

Processo de controlo de polimerização

Polymerisationssteuerungsverfahren

Polymerisation control process

The present invention relates to a process for controlling the gas-phase co-polymerisation of olefins in a fluidised bed reactor. The present invention further relates to a method for the continuous gas-phase (co-)polymerisation of olefins in a fluidised bed reactor in the presence of a polymerisation catalyst wherein the density SPAN of the polymer powder particles leaving the reactor is maintained below certain values throughout the polymerisation.

Polymerisation control process

The present invention relates to a process for controlling the gas-phase copolymerisation of olefins in a fluidised bed reactor. The present invention further relates to a method for the continuous gas-phase (co-)polymerisation of olefins in a fluidised bed reactor in the presence of a polymerisation catalyst wherein the density SPAN of the polymer powder particles leaving the reactor is maintained below certain values throughout the polymerisation.

Polymerisation control process

The present invention relates to a continuous process for controlling the gas-phase co-polymerisation of olefins in a fluidised bed reactor. The present invention further relates to a method for the continuous gas-phase (co-)polymerisation of olefins in a fluidised bed reactor in the presence of a polymerisation catalyst wherein the density of the polymer powder particles leaving the reactor is maintained constant by controlling the particle size distribution of the polymerisation catalyst. The present invention also relates to a process for controlling the particle size distribution of a polymerisation catalyst in order to achieve the production of a polymer powder of constant density during the continuous gas-phase (co-)polymerisation of olefins in a fluidised bed reactor.

Polymerisation control process

The present invention relates to a continuous process for controlling the gas-phase co-polymerisation of olefins in a fluidised bed reactor. The present invention further relates to a method for the continuous gas-phase (co-)polymerisation of olefins in a fluidised bed reactor in the presence of a polymerisation catalyst wherein the density of the polymer powder particles leaving the reactor is maintained constant by controlling the particle size distribution of the polymerisation catalyst. The present invention also relates to a process for controlling the particle size distribution of a polymerisation catalyst in order to achieve the production of a polymer powder of constant density during the continuous gas-phase (co-)polymerisation of olefins in a fluidised bed reactor.

POLYMERIZATION CONTROL PROCESS.

Proceso para el control de la densidad de las partículas de polvo de polímero que dejan el reactor, siendo formadas dichas partículas de polvo de polímero en un proceso continuo de (co-) polimerización en fase gaseosa de olefina(s) en un reactor de lecho fluido simple en donde el proceso de (co-)polimerización comprende la evacuación del reactor de un chorro de reciclado caliente que comprende un monómero principal y al menos otro reactivo sin reaccionar, una parte enfriada o todo de dicho chorro de reciclar evacuado de dicho reactor, y parte de reciclado o todo de dicho chorro de reciclar enfriado que comprende el monómero principal y el (los) reactivo(s) sin reaccionar a través de la zona de polimerización en dicho reactor en la presencia de un catalizador de polimerización bajo condiciones reactivas, caracterizado porque la dicha densidad de las partículas de polvo de polímero es mantenida constante manteniendo la distribución de tamaño de partícula SPAN del catalizador de polimerizacióno su soporte, bajo 1.6 y, donde más del 99% de las partículas de polvo de polímero que deja el reactor tiene densidades Process for controlling the density of polymer powder particles leaving the reactor, said polymer powder particles being formed in a continuous process of (co-) gas phase polymerization of olefin (s) in a bed reactor simple fluid wherein the (co-) polymerization process comprises the evacuation of the reactor from a hot recycling jet comprising a main monomer and at least one other unreacted reagent, a cooled part or all of said recycled jet evacuated from said reactor , and part of recycling or all of said cooled recycle jet comprising the main monomer and the unreacted reagent (s) through the polymerization zone in said reactor in the presence of a polymerization catalyst under reactive conditions , characterized in that the said density of the polymer powder particles is kept constant while maintaining the SPAN particle size distribution of the catalyst ...

Gas phase polymerization process

The present invention relates to a process for preventing polymeragglomeration and for controlling the density of copolymer produced by an alpha-olefin copolymerization process in a polymerizationreactor, wherein the ratio of the flow rates of introduction of the comonomer(s) to the monomer is kept constant.

Gas phase polymerization process

The present invention relates to a process for preventing polymeragglomerati on and for controlling the density of copolymer produced by an alpha-olefin copolymerization process in a polymerizationreactor, wherein the ratio of th e flow rates of introduction of the comonomer(s) to the monomer is kept consta nt.

Process for the gas-phase (co-)polymerisation of olefins in a fluidised bed reactor

The present invention relates to a process for the gas-phase (co-)polymerisation of olefins in a fluidised bed reactor using a metallocene catalyst characterised in that the polymerisation is performed in the presence of a process aid additive.

Gas fluidised bed terpolymerisation of olefins

0 The present invention relates to a gas fluidised bed process for the production of copolymers having a density between 0.900 and 0.935, which process comprises copolymerisation of (a) ethylene, (b) propylene and/or 1-butene, and (c) alpha-olefins comprinsing from 5 to 8 carbon atoms in the gaseous state, in admixture with an inert gas and optionally with hydrogen, in the presence of a catalytic system comprising a cocatalyst consisting of at least 1 organo-metallic compound of a metal of groups II and III of the Periodic Table of Elements and a special solid catalyst.

Continuous process for gas phase coating of polymerisation catalyst

The present invention relates to a continuous process for gas phase coating of polymerisation catalyst characterised in that the polymerisation catalyst is introduced in a gas phase plug flow type reactor wherein it is submitted to polymerisation conditions in the presence of at least one monomer such that at least 95 % by weight of the produced coated catalysts have a coating yield comprised between 0.5 to 2 times the average coating yield.

Continuous process for gas phase coating of polymerization catalyst

A continuous process for gas phase coating of polymerization catalyst. The polymerization catalyst is introduced in a gas phase plug flow type reactor wherein it is submitted to polymerization conditions in the presence of at least one monomer such that at least 95% by weight of the produced coated catalysts have a coating yield comprised between 0.5 to 2 times the average coating yield.

Process for improving flowability of olefins during gas-phase (co-)polymerisation in a fluidised bed reactor incorporating process aid additives

The present invention relates to a process for the gas-phase (co- )polymerisation of olefins in a fluidised bed reactor using a metallocene catalyst characterised in that the polymerisation is performed in the presen ce of a process aid additive.

Process for the gas-phase (co-) polymerisation of olefins in a fluidized bed reactor

A PROCESS FOR THE GAS-PHASE (CO-)POLYMERIZATION OF OLEFINS IN A FLUIDIZED BED REACTOR USING A METALLOCENE CATALYST IN THAT THE POLYMERIZATION IS PREFORMED IN THE PRESENCE OF A PROCESS AID ADDITIVE SELECTED FROM AT LEAST ONE OF 1) A POLYSULFONE COPOLYRNER, 2) A POLYMERIC POLYAMINE, OR 3) AN OIL-SOLUBLE SULFONIC ACID.

Process for introducing a solid catalyst into a fluidised or agitated vessel

The present invention relates to a process for intro-ducing a solid catalyst particle feed into a fluidised or ag-itated vessel (14) utilising a feed delivery device (1), a vertical feed dilution pipe (3) and a feed injection pipe (6) connected to the vessel (14), said process comprising the steps of: (a) introducing the solid catalyst particles feed from the feed delivery device (1) into the vertical feed di-lution pipe (3), (b) diluting the solid catalyst particles feed by letting the solid particle reaching by gravity their ter-minal velocity in the feed dilution pipe (3), (c) introducing the diluted solid catalyst particles feed into the injection pipe (6) and mixing it with conveying gas, and introducing said gas conveyed diluted solid catalyst particles feed into the vessel (14). The present invention relates to a process for introducing a solid catalyst particle feed into a fluidised or agitated vessel (14) utilising a feed delivery device (1), a vertical feed dilution pipe (3) and a feed injection pipe (6) connected to the vessel (14), said process comprising the steps of: (a) introducing the solid catalyst particles feed from the feed delivery device (1) into the vertical feed di-lution pipe (3), (b) diluting the solid catalyst feed by letting the solid particle reaching by gravity their terminal veloc-ity in the feed dilution pipe (3), (c) introducing the diluted solid catalyst particles feed into the injection pipe (6) and mixing it with a conveying gas, and introducing said gas conveyed diluted solid catalyst particles feed into the ves-sel (14).

Process for introducing a solid catalyst into a fluidised or agitated vessel

The present invention relates to a process for intro-ducing a solid catalyst particle feed into a fluidised or ag-itated vessel (14) utilising a feed delivery device (1), a vertical feed dilution pipe (3) and a feed injection pipe (6) connected to the vessel (14), said process comprising the steps of: (a) introducing the solid catalyst particles feed from the feed delivery device (1) into the vertical feed di-lution pipe (3), (b) diluting the solid catalyst particles feed by letting the solid particle reaching by gravity their ter-minal velocity in the feed dilution pipe (3), (c) introducing the diluted solid catalyst particles feed into the injection pipe (6) and mixing it with conveying gas, and introducing said gas conveyed diluted solid catalyst particles feed into the vessel (14). The present invention relates to a process for introducing a solid catalyst particle feed into a fluidised or agitated vessel (14) utilising a feed delivery device (1), a vertical feed dilution pipe (3) and a feed injection pipe (6) connected to the vessel (14), said process comprising the steps of: (a) introducing the solid catalyst particles feed from the feed delivery device (1) into the vertical feed di-lution pipe (3), (b) diluting the solid catalyst feed by letting the solid particle reaching by gravity their terminal veloc-ity in the feed dilution pipe (3), (c) introducing the diluted solid catalyst particles feed into the injection pipe (6) and mixing it with a conveying gas, and introducing said gas conveyed diluted solid catalyst particles feed into the ves-sel (14).

Gas fluidised bed terpolymerisation of olefins

A gas fluidised bed process for the production of copolymers having a density between 0.900 and 0.935, which process comprises copolymerisation of (a) ethylene, (b) propylene and/or 1-butene, and (c) alpha-olefins comprising from 5 to 8 carbon atoms in the gaseous state, in admixture with an inert gas and optionally with hydrogen, in the presence of a catalytic system comprising a cocatalyst consisting of at least 1 organo-metallic compound of a metal of groups II and III of the Periodic Table of Elements and a special solid catalyst.

Fluidized bed apparatus and process for feeding gas to a fluidized bed

A fluidized bed apparatus (1) having a fluidization grid (2) below which is positioned a tuyere (5) for guiding fluidization gas to the fluidization grid (2). The tuyere (5) comprises a widening pipe the wider end (6) of which is positioned towards the fluidization grid (2) and has an area which is substantially the same as the cross-sectional area of the fluidized bed apparatus (1) and is 2 to 30 times that of the area of the narrower end (7) of the widening pipe. The process for feeding fluidization gas to a fluidized bed using such apparatus enables a good gas distribution across the bed to be achieved with a modest additional pressure drop. The invention is particularly useful for apparatus e.g. greater than 3 m in diameter.

Continuous process for gas phase coating of polymerisation catalyst

The present invention relates to a continuous process for gas phase coating of polymerisation catalyst characterised in that the polymerisation catalyst is introduced in a gas phase plug flow type reactor wherein it is submitted to polymerisation conditions in the presence of at least one monomer such that at least 95 % by weight of the produced coated catalysts have a coating yield comprised between 0.5 to 2 times the average coating yield.

Process and apparatus for gas phase polymerisation of olefins in a fluidized bed reactor

Case7159/B195(2) ABSTRACT OF THE DISCLOSURE Process and apparatus for the gas-phase polymerization of olefins in a fluidized-bed reactor A process for polymerizing olefins in a gas-phase fluidized-bed reactor comprising a reactor body (1), optionally surmounted by a disengagement chamber (2), in which fine particles entrained by the gas mixture leaving the top of the reactor are separated from the gas and recycled to the upper portion of the reactor body. Polymer is withdrawn from the reactor body (1) via at least two polymer outlets, at least one of which (15) is in the lower portion of the reactor body (1) and at least one of which (16) is in the upper portion of the reactor body at a position below the top of the fluidized bed. The invention includes apparatus for polymerizing olefins and the use of the apparatus.

Fluidized bed apparatus and process for feeding gas to a fluidized bed

Continuous process for gas phase coating of polymerisation catalyst

The present invention relates to a continuous process for gas phase coating of polymerisation catalyst characterised in that the polymerisation catalyst is introduced in a gas phase plug flow type reactor wherein it is submitted to polymerisation conditions in the presence of at least one monomer such that at least 95 % by weight of the produced coated catalysts have a coating yield comprised between 0.5 to 2 times the average coating yield.

Continuous process for gas phase coating of polymerisation catalyst

A continuous process for gas phase coating of polymerization catalyst. The polymerization catalyst is introduced in a gas phase plug flow type reactor wherein it is submitted to polymerization conditions in the presence of at least one monomer such that at least 95% by weight of the produced coated catalysts have a coating yield comprised between 0.5 to 2 times the average coating yield.

Fluidized bed apparatus and process for feeding gas to a fluidized bed apparatus

A FLUIDIZED BED APPARATUS (1) HAVING A FLUIDIZATION GRID (2) BELOW WHICH IS POSITIONED A TUYERE (5) FOR GUIDING FLUIDIZATION GAS TO THE FLUIDIZATION GRID (2). THE TUYERE (5) COMPRISES A WIDENING PIPE THE WIDER END (6) OF WHICH IS POSITIONED TOWARDS THE FLUIDIZATION GRID (2) AND HAS AN AREA WHICH IS SUBSTANTIALLY THE SAME AS THE CROSS- SECTIONAL AREA OF THE FLUIDIZED BED APPARATUS (1) AND IS 2 TO 30 TIMES THAT OF THE AREA OF THE NARROWER END (7) OF THE WIDENING PIPE. THE PROCESS FOR FEEDING FLUIDIZATION GAS TO A FLUIDIZED BED USING SUCH APPARATUS ENABLES A GOOD GAS DISTRIBUTION ACROSS THE BED TO BE ACHIEVED WITH A MODEST ADDITIONAL PRESSURE DROP. THE INVENTION IS PARTICULARLY USEFUL FOR APPARATUS E.G GREATER THAN 3 M IN DIAMETER. (FIG 1)

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