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1. WO2000042083 - PRODUCTION OF POLYETHYLENE

Publication Number WO/2000/042083
Publication Date 20.07.2000
International Application No. PCT/EP2000/000358
International Filing Date 18.01.2000
Chapter 2 Demand Filed 22.05.2000
IPC
B01J 8/24 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
8Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
18with fluidised particles
24according to "fluidised-bed" technique
B01J 19/24 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
19Chemical, physical or physico-chemical processes in general; Their relevant apparatus
24Stationary reactors without moving elements inside
C08F 210/16 2006.01
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
210Copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
16Copolymers of ethene with alpha-alkenes, e.g. EP rubbers
CPC
B01J 19/242
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
19Chemical, physical or physico-chemical processes in general; Their relevant apparatus
24Stationary reactors without moving elements inside
2415Tubular reactors
242in series
B01J 19/2435
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
19Chemical, physical or physico-chemical processes in general; Their relevant apparatus
24Stationary reactors without moving elements inside
2415Tubular reactors
2435Loop-type reactors
B01J 8/24
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
8Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
18with fluidised particles
24according to "fluidised-bed" technique
C08F 210/16
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
210Copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
16Copolymers of ethene with alpha-alkenes, e.g. EP rubbers
Y10S 526/901
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
10TECHNICAL SUBJECTS COVERED BY FORMER USPC
STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
526Synthetic resins or natural rubbers -- part of the class 520 series
901Monomer polymerized in vapor state in presence of transition metal containing catalyst
Y10S 526/904
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
10TECHNICAL SUBJECTS COVERED BY FORMER USPC
STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
526Synthetic resins or natural rubbers -- part of the class 520 series
904Monomer polymerized in presence of transition metal containing catalyst at least part of which is supported on a polymer, e.g. prepolymerized catalysts
Applicants
  • ATOFINA RESEARCH [BE/BE]; Zone Industrielle C B-7181 Seneffe, BE (AllExceptUS)
  • DEBRAS, Guy [BE/BE]; BE (UsOnly)
Inventors
  • DEBRAS, Guy; BE
Common Representative
  • ATOFINA RESEARCH; Patent Department Zone Industrielle C B-7181 Seneffe, BE
Priority Data
99100835.018.01.1999EP
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) PRODUCTION OF POLYETHYLENE
(FR) PRODUCTION DE POLYETHYLENE
Abstract
(EN)
A process of producing polyethylene, the process comprising copolymerising ethylene and an alpha-olefinic comonomer comprising from 3 to 8 carbon atoms in the presence of a chromium-based catalyst in a main polymerisation reactor and, in a gas-phase preliminary reactor upstream of the main polymerisation reactor, chemically treating the chromium-based catalyst with at least one treatment agent prior to introduction of the catalyst into the main polymerisation reactor and releasing from the preliminary reactor waste gases produced during the chemical treatment. An apparatus for producing polyethylene, the apparatus comprising a main reactor having an inlet for receiving gaseous olefin monomer and an outlet for outputting polyethylene, and a preliminary reactor connected to a second inlet of the main reactor, the preliminary reactor being arranged to be operable in the gas phase and having at least one respective inlet for receiving a solid catalyst and at least one treatment agent and a respective outlet for releasing waste gases from the preliminary reactor.
(FR)
Procédé de production de polyéthylène, qui consiste à copolymériser de l'éthylène et un comonomère alpha-oléfinique comprenant 3 à 8 atomes de carbone en présence d'un catalyseur à base de chrome dans un réacteur de polymérisation principal et, dans un réacteur préliminaire à phase gazeuse situé en amont du réacteur de polymérisation principal, à traiter chimiquement le catalyseur à base de chrome avec au moins un agent de traitement avant l'introduction dudit catalyseur dans le réacteur de polymérisation principal, puis à libérer les effluents gazeux présents dans le réacteur préliminaire produits pendant le traitement chimique. La présente invention concerne également un appareil permettant de produire du polyéthylène, qui comprend un réacteur principal pourvu d'un orifice d'entrée destiné à l'introduction d'un monomère d'oléfine gazeux et d'un orifice de sortie destiné à l'évacuation du polyéthylène, et un réacteur préliminaire connecté à un second orifice d'entrée du réacteur principal, le réacteur préliminaire étant conçu pour pouvoir fonctionner dans la phase gazeuse et étant pourvu d'au moins un orifice d'entrée pour l'introduction d'un catalyseur solide et d'au moins un agent de traitement et d'un orifice de sortie destiné à l'évacuation des effluents gazeux du réacteur préliminaire.
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