Evonik Degussa Gmbh

Oxeno Olefinchemie Gmbh

Evonik Operations Gmbh

Martin Trocha

Alfred Kaizik

Nicole Brausch

Hartwig Rauleder

Guido Stochniol

Klaus-Diether Wiese

Wilfried Bueschken

Bernhard Scholz

Imad Moussallem

Walter Toetsch

André Ebbers

Joachim Knebel

Franz Nierlich

Dirk Roettger

Ekkehard Mueh

Stephan Wieber

Juergen Erwin Lang

Martin Stutzmann

Matthias Patz

Dorit Wolf

Patrik Hartmann

Thorben Schütz

Goetz Baumgarten

Hartmut Wiggers

Martin Brandt

Guido Protzmann

Stefan Drees

Jürgen Erwin Lang

Harald Stueger

Jörg Sauer

Silvia Beyer

Harald Stüger

Ralf Merbach

Wilfried B&uuml;schken

Volker Herzog

Christoph Walkner

Juergen Koch

Walter Tötsch

Robert Lechner

Min-Zae Oh

Jens Haubrock

Sabine Kömmelt

Thorsten Schwaertzke

Yuecel Oenal

Götz Baumgarten

Yücel Önal

Bernhard Stützel

Gaurang Dave

Ekkehard Müh

Hans-Jürgen Dillmann

Detlef Arnoldi

Walter T&ouml;etsch

Dirk R&ouml;ettger

Thorsten SCHWÄRTZKE

A process produces a (meth)acrylate ester mixture. The process includes reacting a glycerol formal isomer mixture with an alkyl (meth)acrylate in the presence of a catalyst.

Method for producing monomers from isomeric mixtures

A controlled preparation of octachlorotrisilane and higher polychlorosilane such as DCTS and DCPS from monomeric chlorosilane, proceeds by exposing the chlorosilane to a nonthermal plasma and recycling chlorosilane that has not been converted to octachlorotrisilane into the plasma.

Process for preparing octachlorotrisilane and higher polychlorosilanes with utilization of hexachlorodisilane

The present invention relates to a continuous process for hydrogenating halogen-containing silane compounds having at least three silicon atoms, in which at least one halogen-containing silane compound having at least three silicon atoms and at least one hydrogenating agent are converted continuously to form at least one hydridosilane compound having at least 3 silicon atoms and oxidized hydrogenating agent, and wherein oxidized hydrogenating agent is withdrawn and reduced, and the reaction product of this reduction reaction is sent back to the hydrogenation, to the hydridosilane compounds obtainable by this process and to the use thereof.

Method for hydrogenating higher halogen-containing silane compounds

The invention relates to a method for producing hydridosilanes from halosilanes by a) reacting i) at least one halosilane of the generic formula SiX(with n&#x2267;3 and X&#x2550;F, Cl, Br and/or I) with ii) at least one catalyst of the generic formula NRR'R&#x2033;Ywith a=0 or 1, b=0 or 1, and c=0 or 1, and formula (I), wherein aa) R, R' and/or R&#x2033; are &#x2014;C-Calkyl, &#x2014;C-Caryl, &#x2014;C-Caralkyl, &#x2014;C-Caminoalkyl, &#x2014;C-Caminoaryl, &#x2014;C-Caminoaralkyl, and/or two or three groups R, R&#x2032; and R&#x2033; (if c=0) together form a cyclic or bicyclic, heteroaliphatic or heteroaromatic system including N, with the proviso that at least one group R, R&#x2032; or R&#x2033; is unequal &#x2014;CHand/or wherein bb) R and R&#x2032; and/or R&#x2033;' (if c=1) are &#x2014;C-Calkylene, &#x2014;C-Carylene, &#x2014;C-Caralkylene, &#x2014;C-Cheteroalkylene, &#x2014;C-Cheteroarylene, &#x2014;C-Cheteroaralkylene and/or &#x2014;N&#x2550;, or cc) (if a=b=c=0) R&#x2550;&#x2261;C-R&#x2032;&#x2033; (with R&#x2032;&#x2033;&#x2550;&#x2014;C-Calkyl, &#x2014;C-Caryl and/or &#x2014;C-Caralkyl), while forming a mixture comprising at least one halosilane of the generic formula SiX(with m&#x3e;n and X&#x2550;F, Cl, Br and/or I) and SiX(with X&#x2550;F, Cl, Br and/or I), and b) hydrogenating the at least one halosilane of the generic formula SiHwhile forming a hydridosilane of the generic formula SiH. The invention also relates to the hydridosilanes producible according to said method and to their use.

Method for producing hydridosilanes

The present invention relates to a process for purifying low molecular weight hydridosilane solutions, in which a solution to be purified comprising a) at least one low molecular weight hydridosilane, b) at least one solvent and c) at least one impurity selected from the group of the compounds having at least 20 silicon atoms and/or the group of the homogeneous catalyst systems is subjected to a crossflow membrane process with at least one membrane separation step using a permeation membrane.

Process for purifying low molecular weight hydridosilanes

Process for preparing higher hydridosilanes of the general formula H&#x2014;(SiH)&#x2014;H where n&#x2267;2, in which&#x2014;one or more lower hydridosilanes&#x2014;hydrogen, and&#x2014;one or more transition metal compounds comprising elements of transition group VIII of the Periodic Table and the lanthanides are reacted at a pressure of more than 5 bar absolute, subsequently depressurized and the higher hydridosilanes are separated off from the reaction mixture obtained.

Process for preparing higher hydridosilanes

The present invention provides a porous semiconductive structure, characterized in that the structure has an electrical conductivity of 5&#xb7;10S&#xb7;cmto 10 S&#xb7;cm, and an activation energy of the electrical conductivity of 0.1 to 700 meV, and a solid fraction of 30 to 60% by volume, and a pore size of 1 nm to 500 nm, the solid fraction having at least partly crystalline doped constituents which are bonded to one another via sinter necks and have sizes of 5 nm to 500 nm and a spherical and/or ellipsoidal shape, which comprise the elements silicon, germanium or an alloy of these elements, and also a process for producing a porous semiconductive structure, characterized in that

Porous semiconductive film and process for its production

The invention relates to a process for preparing alcohols by hydroformylation of olefins or olefin mixtures, separation from the catalyst and subsequent hydrogenation, with an extraction being carried out after removal of the catalyst and before the hydrogenation of the aldehydes.

Method for the hydroformylation of olefins

Olefins having from 5 to 24, in particular from 5 to 12, carbon atoms are hydroformylated by reacting an olefin or a mixture of olefins in the presence of an unmodified cobalt catalyst in a single-stage process in a reactor at a temperature of from 100&deg; C. to 220&deg; C. and a pressure of from 100 bar to 400 bar, to obtain an aldehyde, an alcohol or a mixture thereof. An aqueous bottom phase and an organic phase are present in the reactor, the aqueous bottom phase is mixed with the organic phase, and a concentration of the cobalt catalyst, calculated as metallic cobalt, in the aqueous bottom phase is in the range from 0.4 to 1.7% by mass based on the total weight of the aqueous bottom phase. A level of the aqueous bottom phase in the reactor is kept constant during steady-state operation.

Process for the hydroformylation of higher olefins using cobalt compounds as catalyst

Stabilizing rhodium catalysts for the hydroformylation of olefins

The invention relates to a catalytic process for carrying out multiphase reactions in a tubular reactor, with the catalyst being present in the continuous phase and at least one starting material in a disperse phase and the loading factor B of the tubular reactor being equal to or greater than 0.8. The process is especially suitable in particular for the hydroformylation of olefins. The aldehydes thus prepared can ideally be used for the preparation of alcohols, carboxylic acids or in aldol condensations.

Process for the catalytically carrying out multiphase reactions, in particular hydroformylations

The invention relates to a process for preparing higher oxo alcohols from mixtures of isomeric olefins having from 5 to 24 carbon atoms by hydroformylation in the presence of a catalyst at elevated temperature and at elevated pressure, in which the hydroformylation is carried out in one stage, the olefin conversion rate for one pass is restricted to from 40 to 90% to produce a reaction mixture, and the reaction mixture is selectively hydrogenated.

Process for preparing higher oxo alcohols from olefin mixtures

Growing community of inventors

Essen, Germany

Martin Trocha