Evonik Degussa Gmbh

Huels Aktiengesellschaft

Degussa Aktiengesellschaft

Degussa-huels Aktiengesellschaft

Huls Aktiengesellschaft

E.i. Dupont De Nemours and Company

Evonik Industries Ag

Huels Troisdorf Ag

Huels Atiengesellschaft

Hartwig Rauleder

Ekkehard Mueh

Juergen Erwin Lang

Hans-Joachim Kotzsch

Claus-Dietrich Seiler

Reinhold Schork

Burkhard Standke

Jaroslaw Monkiewicz

Frank Kropfgans

Christian Goetz

Carl-Friedrich Hoppe

Michael Horn

Franz-Michael Bollenrath

Stefan Bade

Uwe Schoen

Rainer Nicolai

Mieczyslaw Kuzma

Hans-Joachim Vahlensieck

Hans-Guenther Srebny

Hans-Joachim Koetzsch

Imad Moussallem

Lothar Zehe

Christian Panz

Martin Trocha

Albert Frings

Hermann-Josef Korte

Harald Klein

Christoph Schwarz

Jürgen Erwin Lang

Peter Jenkner

Albert-Johannes Frings

Georg Markowz

Stephan Wieber

Adolf Kuehnle

Matthias Patz

Klaas Timmer

Mustafa Siray

Hartmut Rudolf Fischer

Uwe Tanger

Nicole Brausch

Markus Ruf

Reinhard Matthes

Hermann Peeters

Carsten Jost

Harald Stueger

Hans-Gunther Srebny

Julia Lyubina

Rüdiger Schütte

Harald Stüger

Thomas Jostmann

Norbert Schladerbeck

Harald Seiler

Bodo Frings

Christian Götz

Florian Paulat

Christoph Koopmann

Christoph Walkner

Guido Titz

Simon Becht

Jürgen Behnisch

Ingrid Lunt-Rieg

Sven Müller

Rainer Amend

Bernt Kesper

Janaina Marinas Perez

John Burkhard

Norbert Hofmann

Klaus-Dieter Krieger

Goswin Uehlenbruck

Martin Hajduk

Robert Koell

Peter Erlhöfer

Hans-Joachim Kotzch

Rheinhard Matthes

Udo Horns

Klaus-Dieter Kassmann

Burkhart Standke

Thomas Barthel

Harald-Jurgen Biangardi

Claudia Fuhrmann

Dieter Oehm

Dorothea Schwarz

Ingo Pauli

Andreas Nelte

Beate Seliger

Hanns-Peter Popp

Ekkehard Müh

Come Rentrop

Janaina Marinas Pérez

Roelant Van Dam

Adolf Kühnle

Uwe Schön

Joachim Diefenbach

Jurgen Erwin Lang

Jürgen Lang

Christian GÖTZ

Janaina Marinas PÉREZ

The present invention relates to a method of purifying strong acids or strongly acidic media to remove di- and higher valent metal ions, which can be used within the context of the production of high-purity silica. The invention further relates to the use of special ion exchangers for carrying out the method according to the invention and the resultant high-purity silicas.

Method for the separation of metal ions that are divalent or higher from strong acids or highly acidic media

The present invention relates to a process for preparing aqueous colloidal silica sols of high purity from silicate solutions, to aqueous colloidal silica sols with a specific profile of impurities, and to the use thereof. The invention further encompasses high-purity aqueous silica obtained as an intermediate in the course of the purification process, high-purity silicon dioxide obtainable by dewatering, and the use thereof.

Process for preparing aqueous colloidal silica sols of high purity from alkali metal silicate solutions

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 invention relates to a process and an apparatus for preparation of polychlorosilanes from monomeric chlorosilanes, by subjecting the chlorosilanes to a thermal plasma.

Method and device for producing polychlorosilanes

The invention relates to a process for preparing polysilanes by converting monosilane in the presence of hydrogen in a plasma, and to a plant for performing the process.

Process and apparatus for preparation of polysilanes

The invention relates to a process for dismutating at least one halosilane and reducing the content of extraneous metal and/or a compound containing extraneous metal in the at least one halosilane and in the at least one silane obtained, by contacting at least one halosilane of the general formula I, HSiCl(I), where n and m are integers and n=1, 2 or 3 and m=1, 2 or 3 and n+m=4, with a particulate, organic, amino-functional resin to obtain at least one silane of the general formula II, HSiCl(II), where a and b are integers and a=0, 2, 3 or 4 and b=0, 1, 2 or 4 where a+b=4, in one step, in which the content of extraneous metal and/or compounds containing extraneous metal has been reduced compared to the halosilane of the formula I. The invention further provides for the use of this resin for dismutating halosilanes and as an absorbent of extraneous metals or compounds containing extraneous metal in a process for preparing monosilane.

Process and use of amino-functional resins for dismutating halosilanes and for removing extraneous metals

The invention relates to a process for preparing dimeric and/or trimeric silanes by conversion of monosilane in a plasma and to a plant for performance of the process.

Apparatus for the preparation of silanes

The invention relates to a process and an apparatus for controlled preparation of octachlorotrisilane from monomeric chlorosilanes, by subjecting the chlorosilanes to a thermal plasma.

Process and apparatus for preparation of octachlorotrisilane

Hollow bodies having a silicon-comprising shell, are produced by, in a gas comprising at least one silane of the general formula SiHXwith n=1 to 4, m=0 to 2n+2 and X=halogen, (a) generating a non-thermal plasma by an AC voltage of frequency f, or operating a light arc, or introducing electromagnetic energy in the infrared region into the gas, giving a resulting phase which (b) is dispersed in a wetting agent and distilled, and then (c) the distillate is contacted at least once with a mixture of at least two of the substances hydrofluoric acid, nitric acid, water, giving a solid residue comprising hollow bodies having a silicon-comprising shell after the conversion reaction of the distillate with the mixture has abated or ended.

Process for producing hollow silicon bodies

The invention relates to a process for converting polychlorosilanes into hexachlorodisilane, by one or more trimeric polychlorosilanes or a trimeric polychlorosilane in a mixture with higher molecular weight polychlorosilanes being exposed to a gas discharge and hexachlorodisilane being formed and isolated.

Process for the preparation of hexachlorodisilane by cleavage of higher polychlorosilanes such as octachlorotrisilane

Method for the preparation of silanes

The present invention relates to a specific process for producing trisilylamine from monochlorosilane and ammonia in the liquid phase. The invention further relates to a plant in which such a process can be carried out with advantage.

Process for the preparation of trisilylamine from monochlorosilane and ammonia

The present invention relates to a specific process for producing trisilylamine from monochlorosilane and ammonia in the liquid phase. The invention further relates to a plant wherein such a process can be carried out with advantage.

Production of trisilylamine from monochlorosilane and ammonia by use of inert solvent

The invention relates to a method for indirectly determining the purity of silanes and germanes using a device for measuring specific resistance. The invention further relates to a system for industrially producing and/or filling containers with silanes or germanes, including a quality control in which a device is used for measuring specific resistance.

Use of specific resistivity measurement for indirect determination of the purity of silanes and germanes and a corresponding process

The invention provides a method for the processing of finely divided solids during the production of chlorosilanes, which is characterized in that the finely divided solids are hydraulically pressed to give bodies of increased density. Moreover, also provided is the compact obtained by the process according to the invention which is characterized by a filling factor of the finely divided solids to be hydraulically pressed of 3.9 to 4.5.

Method for processing finely divided solids during production of chlorosilanes

Growing community of inventors

Rheinfelden, Germany

Hartwig Rauleder