GAS PHASE OLEFIN POLYMERISATION PROCESS AND APPARATUS

The present invention is a process and an apparatus for the gas phase polymerization of olefin(s) using a fluidised-bed reactor ( 1 ) from which, at the top part, is withdrawn a recycling gas stream which comprises unreacted gas and entrained solid particles and which is moved by virtue of a compres...

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Bibliographische Detailangaben
1. Verfasser:	MAUREL, JEAN-ALAIN
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BLASTING CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY COMPOSITIONS BASED THEREON DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OFGENERAL APPLICATION HEAT EXCHANGE IN GENERAL HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS,IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT HEATING LIGHTING MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS MECHANICAL ENGINEERING METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL THEIR PREPARATION OR CHEMICAL WORKING-UP THEIR RELEVANT APPARATUS TRANSPORTING WEAPONS
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Beschreibung
Zusammenfassung:	The present invention is a process and an apparatus for the gas phase polymerization of olefin(s) using a fluidised-bed reactor ( 1 ) from which, at the top part, is withdrawn a recycling gas stream which comprises unreacted gas and entrained solid particles and which is moved by virtue of a compressor ( 4 ), which is cooled by passing into a heat exchanger ( 7 ) and which is reintroduced into the reactor at the bottom part ( 1 a) of the latter. The heat exchanger ( 7 ) is a multitubular exchanger successively comprising an inlet chamber ( 6 ), a bundle of tubes ( 9 ) with a horizontal longitudinal axis and an outlet chamber ( 10 ) equipped with a discharge orifice ( 11 ). In the outlet chamber ( 10 ) the flow of the gas stream is accelerated up to the orifice ( 11 ) and is directed at any point in the said chamber along a horizontal axis and/or towards the bottom part ( 1 a) of the said chamber, so as to create, in the bottom part of the said chamber, a sweeping stream which flows horizontally or with a downward inclination and without obstacle up to the orifice and which promotes the entrainment of the particles up to the orifice.