Basell Polyolefine Gmbh

Basf Aktiengesellschaft

Andrei Gonioukh

Andre-Armand Finette

Thomas Herrmann

Dieter Littmann

Andreas Deckers

Wilhelm Weber

Dieter Lilge

Marc Oliver Kristen

Roger G Klimesch

Benno Bildstein

Sven Wolfram

Lars Wittkowski

Michael Malaun

Thomas Dröge

Eckard Schauss

Gernot Köhler

Stephan Lehmann

Christoph Amort

Iakovos Vittorias

Gerd Mannebach

G&uuml;nther Schweier

Stephan Schmitz

Christoph Wolf

Georg Groos

Philipp Rosendorfer

Frank-Olaf Mähling

Barbara Gall

Wolfgang Micklitz

Klaus Berhalter

Carsten S&uuml;ling

Frank-Olaf M&auml;hling

Gerhard Hauck

Ernst Fischer

Sebastian Weiand

Siegfried Mischok

Andreas Hradsky

Christoph Treis

Thomas Dr&ouml;ge

Guido Bürger

Guido Küpper

Udo Backes

Theo Teuber

Hicran Cabuk

David Finotto

Gilles Rieu

Laurent Hautier

Markus Busch

Gernot c/o Basell Bayreuth Chemie Gmbh Köhler

A process for polymerizing or copolymerizing ethylenically unsaturated monomers at pressures in the range of from 110 MPa to 500 MPa in a production line comprising a continuously operated polymerization reactor, wherein the process comprises monitoring the surrounding of the production line with respect to an occurrence of a leakage of monomers or of reaction mixture by an IR point detector arrangement of at least three groups of IR point detectors which are capable of detecting hydrocarbons and the groups of IR point detectors are operating according to a voting logic and starting automatically an emergency pressure release program when a group of IR point detectors of the IR point detector arrangement detects the presence of hydrocarbons.

High-pressure polymerization process of ethylenically unsaturated monomers

A process for polymerizing or copolymerizing ethylenically unsaturated monomers at pressures in the range of from 110 MPa to 500 MPa in a production line comprising a continuously operated polymerization reactor which is installed within a protective enclosure, wherein the production line is monitored with respect to an occurrence of a leakage of monomers or of reaction mixture and a water based deluge system, which provides droplets of a diameter in a range from 25 &#x3bc;m to 20 mm to the enclosed area, is automatically started with a minimum flow rate of 10 L/min per mof enclosed area when a leakage of monomers or of reaction mixture is detected.

High-pressure polymerization process of ethylenically unsaturated monomers carred out in a polymerization reactor installed within a protective enclosure

The present disclosure provides a low density polyethylene (LDPE) having (A) a density from 0.910 to 0.924 g/cm, determined according to ISO 1183 at 23&#xb0; C.; (B) an elongational hardening of at least 4.2, at 150&#xb0; C. at an elongational rate of 1 s; (C) a ratio Mw/Mn of at least 18, where (i) Mw is the weight average molar mass, measured by a MALLS detector coupled to a GPC, and (ii) Mn is the number average molar mass, measured by GPC (Gel Permeation Chromatography); and (D) a Mw of at least 230,000 g/mol. The present disclosure also provides an article of manufacture made from or containing (A) a substrate and (B) a coating layer made from or containing the disclosed LDPE. The present disclosure further provides a polymerization process occurring (A) in the presence of oxygen as the only radical initiating agent and (B) in the absence of solvents.

Low density polyethylene with high elongation hardening

A process for polymerizing or copolymerizing ethylenically unsaturated monomers at pressures in the range of from 110 MPa to 500 MPa in a production line comprising a continuously operated polymerization reactor, wherein at least one of a pre-heater or pre-cooler, a polymerization reactor or a post reactor cooler is composed of tubes of a length from 5 m to 25 m which are flanged together, either directly or via bends, and the flanges are covered by a chimney construction, and wherein air is conveyed through the chimney construction and the air exiting the chimney construction is monitored with respect to the hydrocarbons concentration.

High-pressure polymerization process of ethylenically unsaturated monomers in a production line having flanges covered by a chimney construction

The present disclosure relates to a plant for performing polymerization, such as the polymerization of ethylene, having a recycle connection with two or more cooling channels arranged in parallel, a process for polymerization and downstream processes, and a plant for polymerization, comprising the following plant components in fluid communication:

Polymerization plant having parallel cooling channels in a recycle connection

A process for polymerizing or copolymerizing ethylenically unsaturated monomers in the presence of free-radical polymerization initiators, wherein the polymerization is carried out at temperatures from 100&#xb0; C. to 350&#xb0; C. and pressures in the range of from 110 MPa to 500 MPa in a continuously operated polymerization reactor which is controlled by a pressure control valve at the outlet of the polymerization reactor, the process comprising continuously monitoring the pressure within the polymerization reactor, feeding a pressure signal to a controller for controlling the control valve and having the controller altering the opening of the pressure control valve to control the pressure within the polymerization reactor, wherein the controller starts an emergency shutdown program when the pressure control valve closes more than a preset threshold value and the pressure within the polymerization reactor decreases below a preset pressure threshold.

Process for polymerizing or copolymerizing ethylenically unsaturated monomers in the presence of free-radical polymerization initiators at pressures in the range of from 110 MPa to 500 MPa and temperatures in the range of from 100&#xb0; C. to 350&#xb0; C. in a continuously operated polymerization apparatus, wherein the reaction gas composition is compressed to the polymerization pressure by at least two sequentially operating compressors in which a low-pressure compressor first compresses the reaction gas composition to a pressure of from 10 MPa to 50 MPa and a high-pressure compressor then further compresses the reaction gas composition to the polymerization pressure wherein the high-pressure compressor is operated with a polyalkylene glycol based synthetic lubricant and oxygen is introduced into the fresh gas feed or into the polymerization apparatus in an amount that the gas composition to be compressed in the high-pressure compressor has an oxygen content in the range of from 0.01 ppm to 0.9 ppm.

Process for polymerizing or copolymerizing ethylenically unsaturated monomers in the presence of free-radical polymerization initiators

The invention relates to a process for the continuous preparation of ethylene homopolymers or copolymers in the presence of free-radical polymerization initiators and, if desired, molecular weight regulators at from 120&#xb0; C. to 350&#xb0; C. and pressures in the range from 100 to 4000 bar, in which the polymer is separated from unpolymerized ethylene in a high-pressure stage at a pressure of from 100 to 500 bar and at least one low-pressure stage at a pressure of from 1 to 100 bar and the ethylene separated off in the high-pressure stage is separated from remaining monomeric, oligomeric and/or polymeric constituents and recirculated to the inlet of the tube reactor in a high-pressure circuit and the ethylene separated off in the low-pressure stage is separated from remaining monomeric, oligomeric and/or polymeric constituents and recirculated to the inlet of the tube reactor in a low-pressure circuit. The initiator is used as a solution in an isoparaffinic solvent having a boiling point of not more than 160&#xb0; C. and the solvent is separated from the other monomeric, oligomeric and/or polymeric constituents in the low-pressure circuit. The solvent is then, if appropriate after being admixed with fresh solvent, reused for dissolving initiator.

Continuous preparation of ethylene homopolymers or copolymers

Catalysts for the polymerization of unsaturated compounds

A process for preparing ethylene polymers by the high-pressure method comprises dissolving one or more free-radical initiators in one or more ketones of the formula Iwhere Rand Rare identical or different and are selected from among C-C-alkyl and C-C-cycloalkyl and Rand Rmay also be covalently linked to one another to form a 4- to 13-membered ring, prior to the polymerization,compressing the solution, metering it into the polymerization reactor at one or more points and subsequently carrying out the polymerization at from 150 to 380&#xb0; C. and from 500 to 4500 bar.

Preparation of ethylene polymers by the high-pressure method

Ethylene homopolymers and copolymers are prepared in a tube reactor at from 160&#xb0; C. to 350&#xb0; C. and pressures in the range from 500 to 5000 bar, with or without use of molar mass regulators, using a peroxide mixture comprising from 1 to 95 mol %, based on the total amount of the peroxide mixture, of at least one cyclic peroxide of the formula I,where the radicals R are identical or different and are selected from among alkyl groups and aryl groups, as polymerization initiator.

Preparation of polyethylene

Bisimidino compounds and the transitional metal complexes thereof as well as the use thereof as catalysts

Method for producing ethylene polymers in a high-pressure process

Metal organic catalysts for polymerizing unsaturated compounds

Catalyst system with aluminum fluoride activator

Growing community of inventors

Erftstadt, Germany

Andrei Gonioukh