Hoechst Aktiengesellschaft

Peroxid-chemie Gmbh

Exxonmobil Chemical Patents Inc.

Other

Basf Se Corporation

Gerhard Luft

Peter Trabold

Gebhard Ritter

Patrick Brant

Terry John Burkhardt

John Richard Shutt

Lawrence Carl Smith

Maximilian Dorn

Douglas J McLain

Rudolf Pfaendner

Michael Roth

Joachim Semel

Jorg Schmid

Wolfgang Schick

Brigitte Batarseh

Frank Freidel

Majid Jabbari

Ulrich Rappold

Heinrich Merten

Matthias Schubert

Norbert Fischer

Maiximilian Dron

The present invention relates to a method for the radical polymerization or copolymerization of ethylene at high pressures using a hydroxylamine ester as radical initiator. The hydroxylamine esters according to the invention are suitable initiators for the high pressure polymerization of ethylene leading to high molecular weight polyethylenes with narrow molecular weight distributions (Poyldispersity Index PD=1, 2-4.5).

Method of preparing ethylene polymers by controlled high pressure polymerization

This invention relates to a process to polymerize olefins comprising contacting, in a polymerization system, olefins having three or more carbon atoms with a catalyst compound, activator, optionally comonomer, and optionally diluent or solvent, at a temperature above the cloud point temperature of the polymerization system and a pressure no lower than 10 MPa below the cloud point pressure of the polymerization system, where the polymerization system comprises any comonomer present, any diluent or solvent present, the polymer product, where the olefins having three or more carbon atoms are present at 40 weight % or more.

Polymer production at supercritical conditions

Process for the production of ethylene co-polymers

Process for separating hydrogen halides from gases containing sulphur

Process for the production of polyolefins and a catalyst for carrying

For the preparation of polyethylenes using a diphenyl ethane derivative as C-C labile polymerization initiator, 1 to 40 mole 3,4-dimethyl-3,4-diphenyl hexane, based on 1 million mole ethylene used, are polymerized at 260.degree. to 400.degree. C. at a pressure of 60,000 to 350,000 kgfa.

Process for the preparation of polyethylenes

In a supported catalyst for the preparation of monocarboxylic anhydrides by carbonylation of the appropriate esters or ethers, where, in the supported catalyst, an organosilicon compound is bonded, as a polyfunctional coupling agent, on the one hand to a support material and on the other hand to a noble-metal compound from group VIII of the Periodic Table of the Elements, the coupling agent is a chelate-forming organosilicon compound of the general formula ##STR1## where X=Cl, Br or --OR.sup.2 ;

Supported catalyst for the preparation of monocarboxylic anhydrides

The process for the preparation of monocarboxylic anhydrides of the general formula (RCO).sub.2 O is carried out by reacting a carboxylic ester or a dialkyl ether of the general formula RCOOR or ROR, in which R in each case denotes the same alkyl radical having 1 to 4 carbon atoms, with carbon monoxide in the gas phase in the presence of a supported catalyst. The reaction takes place by means of bromine or iodine or compounds thereof as reaction promoter. The support material in the catalyst supports a noble metal chelate compound which is formed by a noble metal compound from group VIII of the periodic table and a chelating agent containing organonitrogen, organophosphorus, organoarsenic, organosulfur or mercapto groups and substituted in its basic structure with alkyl, aryl or aralkyl groups. The reaction is carried out at temperatures from 130.degree. to 400.degree. C. and pressures from 1 to 150 bar.

Process for the preparation of monocarboxylic anhydrides

In the process for the preparation of monocarboxylic anhydrides of the general formula (RCO).sub.2 O by reacting a carboxylic acid ester of dialkyl ether of the general formula RCOOR or ROR, where R in each case denotes the same alkyl radical having 1 to 4 carbon atoms, with carbon monoxide in the gas phase in the presence of iodine or bromine or compounds thereof as reaction promoter, and in the presence of a supported catalyst, at temperatures of from 130.degree. to 400.degree. C. and pressures of from 1 to 150 bar, where, in the supported catalyst, an organosilicon compound is bonded, as a polyfunctional coupling agent, on the one hand to a support material and on the other hand to a noble-metal compound from group VIII of the Periodic Table, a chelate-forming organosilicon compound of the general formula ##STR1## is employed as the polyfunctional coupling agent, where X=Cl, Br or --OR.sup.2 ;

Monocarboxylic anhydrides of the general formula (RCO).sub.2 O are made by reacting a carboxylic acid ester or dialkylether of the general formulae RCOOR and ROR, respectively, in which R stands for one and the same alkyl radical having from 1-4 carbon atoms, with carbon monoxide in gas phase, in the presence of iodine or bromine or their compounds as a reaction promoter and also in the presence of a carrier-supported catalyst containing noble metal compounds of group VIII of the Periodic System, at temperatures of 130.degree.-400.degree. C. and under pressures of 1-150 bars. To this end, a novel carrier-supported catalyst is used in which the carrier material has a noble metal/chelate-compound formed of the noble metal compound and a chelator containing organonitrogen, organophosphorus, organoarsenic or organosulfur groups applied to it.

Carrier-supported catalyst and process for making monocarboxylic

Carrier-supported catalyst and process for making mono-carboxylic

Carrier-supported catalyst for making monocarboxylic anhydrides by subjecting a suitable ester or ether to carbonylation. The carrier supported catalyst has an organosilicon compound containing an alkoxy or halogen group and also an organonitrogen, organophosphorus, organoarsenic, organosulfur, mercapto or thioether group as a polyfunctional adhesion promoter additively combined with the carrier material on the one hand, and with the noble metal compound of the 8th subgroup of the Periodic System of the elements, on the other hand.

Carrier-supported catalyst for making monocarboxylic anhydrides

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Muhltal, Germany

Gerhard Luft