Hoechst Aktiengesellschaft

Vinnolit Technologie Gmbh & Co. Kg

Uhde Gmbh

Vinnolit Monomer Gmbh & Co. Kg

Vinnolit Gmbh&co. Kg

Ingolf Mielke

Peter Schwarzmaier

Peter Kammerhofer

Horst Ertl

Michael Benje

Klaus Krejci

Manfred Stoger

Thomas Wild

Heinz Klippert

Otto Plewan

Thomas Schottle

Norbert Paul

Reinhold Freudenreich

Rudolf Huber

Karl Rettenbeck

Dieter Jaculi

Peter Hackl

Helmut Kalliwoda

Rudolf Spielmannleitner

J&uuml;rgen Eichler

Reinhard Krumb&ouml;ck

Wenzel K&uuml;hn

Manfred St&ouml;ger

Joachim Schubert

Uwe Wäterling

Peter Schwarzmeier

The invention relates to a process for the production of vinyl chloride by thermal cracking, in which the energy balance, the operating time of the cracking furnace and/or the yield of the reaction are distinctly enhanced in comparison with the prior art. A pressure of from 1.4 to 2.5 MPa is established in the cracking coil at a temperature of from 450 to 550&#xb0; C. and, for pre-heating the EDC (=1,2-dichloroethane) introduced, inter alia the waste heat of the gas stream leaving the top of the quench column is utilized.

Apparatus and process for the production of vinyl chloride by thermal cracking of 1,2-dichloroethane

The present invention relates to a device and a process for introducing gas into a fluidised bed reactor having at least one gas inlet pipe () located underneath and/or above the fluidised bed for introducing gas into the fluidised bed, characterized in that the gas inlet pipe () has gas-swirling means upstream of and/or at its mouth.

Device for introducing gas into a fluidised bed and a process therefor

An apparatus for producing ethylenically unsaturated aliphatic halogenic hydrocarbons by thermal cleavage of saturated aliphatic halogenic carbons using an apparatus that introduces an educt gas stream into a reactor which includes at least one supply conduit which opens into the reactor, the supply conduit feeds a heated gas formed from cleavage promotors and radicals produced by a nonthermal plasma device which permits an increased in the yield of the cleavage reaction.

Method for producing unsaturated halogenic hydrocarbons and device suitable for use with said method

The invention relates to a method for producing high purity 1,2-dichloroethane using a liquid reaction medium that is circulated and that is essentially composed of 1,2-dichloroethane and a catalyst. At least ethylene and chlorine are added to the reaction medium and a mainly chlorine-containing gas flow is dissolved in a part of the reaction medium which is essentially devoid of dissolved ethylene. The gaseous components not dissolved in this solution are removed from the solution by means of a gas-separation device and the solution from which the undissolved gas components were removed is contacted with ethylene which is present in dissolved form.

Method for producing 1, 2-dichloroethane by direct chlorination

The present invention is directed to a process for preparing 1,2-dichloroethane by reacting ethene with hydrogen chloride and oxygen over a copper-containing fluidized-bed catalyst. The discharge of the catalyst from the reactor per se is avoided if the catalyst is virtually completely retained in the upper part of the reactor by means of superfine filtration.

Process for the preparation of 1,2-dichloroethane by oxychlorination

The preparation of 1,2-dichloroethane (EDC) is carried out by feeding ethylene and chlorine into circulating EDC (direct chlorination) such that the reaction mixture boils and the heat of the reaction is led away from the gas space.

Process for preparing 1,2-dichloroethane by direct chlorination

Process and apparatus for preparing 1,2-dichloroethane by direct chlorination

The conversion rate in the preparation of vinyl chloride by thermal cracking of 1,2-dichloroethane is determined by measuring the absorption of high-energy radiation, the pressure and the temperature of the gases issuing from the cracking furnace.

Process for the preparation of vinyl chloride

In the preparation of vinyl chloride by thermal cracking of 1,2-dichloroethane, three distillation stages are used to distill off first hydrogen chloride, then vinyl chloride and finally entrained hydrogen chloride with vinyl chloride. If, in the last stage, entrained water is not drawn off via the bottom, it is recirculated with the top product to the first stage and causes corrosion. Removal of the water at the top of the third distillation stage, advantageously by drying, prevents the corrosion.

Process and apparatus for purifying vinyl chloride

A process for the preparation of hexafluoropropene by thermal cleavage of chlorotetrafluoroethane and/or chlorohexafluoropropane or a mixture of chlorotetrafluoroethane and perfluorocyclobutane at 600.degree. to 1,000.degree. C. and under a pressure of 1 to 1,000 kPa is described. The thermal cleavage is carried out in the presence of at least 0.05 mole of tetrafluoroethylene per mole of chlorotetrafluoroethane and/or chlorohexafluoropropane or mixture of chlorotetrafluoroethane and perfluorocyclobutane employed. By means of this process hexafluoropropene is obtained for a small extra expenditure on apparatus at a good selectivity and in an improved space-time yield.

Process for the preparation of hexafluoropropene

An addition of benzotrichloride produces a significantly higher yield of vinyl chloride in the thermal cleavage of 1,2-dichloroethane.

A process for continuous telomerization is described, in which at least one telogenic compound and at least one taxogenic compound are reacted at from 40.degree. to 150.degree. C. under a pressure of from 0.1 to 3 MPa in the presence of at least one catalyst in an elongate cylindrical reaction space. After it has left the reaction space, the reaction mixture is separated, for example by distillation, the desired higher-molecular telomers are discharged as the bottom product, and the undesired low-molecular telomerization products are stripped off over the top, condensed and recycled into the process in a first circulation. In a second circulation, a part of the reaction mixture is taken off towards the end of the reaction space and reintroduced into the initial part of the reaction space. This allows an improved space-time yield and a better selection of defined product cuts.

Continuous telomerization process

Process for the manufacture of vinyl chloride polymers containing at least 50% by weight of polymerized vinyl chloride by polymerizing the monomer(s) in aqueous phase at 10 to 90.degree. C. in the presence of an oil-soluble catalyst and 0.03 to 0.4 weight % of a mixture of suspending agents containing

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Burgkirchen, Germany

Ingolf Mielke