DE920187C - Process for the preparation of alkylchlorosilanes - Google Patents

Process for the preparation of alkylchlorosilanes

Info

Publication number
DE920187C
DE920187C DEB21379A DEB0021379A DE920187C DE 920187 C DE920187 C DE 920187C DE B21379 A DEB21379 A DE B21379A DE B0021379 A DEB0021379 A DE B0021379A DE 920187 C DE920187 C DE 920187C
Authority
DE
Germany
Prior art keywords
alkylchlorosilanes
parts
mixtures
preparation
diluents
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
DEB21379A
Other languages
German (de)
Inventor
Konrad Dr Jost
Wolfgang Dr Schmidt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BASF SE
Original Assignee
BASF SE
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BASF SE filed Critical BASF SE
Priority to DEB21379A priority Critical patent/DE920187C/en
Application granted granted Critical
Publication of DE920187C publication Critical patent/DE920187C/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
    • C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic System
    • C07F7/02—Silicon compounds
    • C07F7/08—Compounds having one or more C—Si linkages
    • C07F7/12—Organo silicon halides
    • C07F7/16—Preparation thereof from silicon and halogenated hydrocarbons direct synthesis

Description

Verfahren zur Herstellung von Alkylchlorsilanen Im Patent 887 343 ist ein Verfahren zur Herstellung von Alkylchlorsilanen beschrieben, bei dem man Alkylchloride oder Gemische aus Olefinen und Chlorwasserstoffgas bei etwa aoo bis 35o°, gegebenenfalls in Gegenwart von Katalysatoren, auf Siliciumpulver einwirken läßt, das in indifferenten, unter den Reaktionsbedingungen flüssigen Verdünnungsmitteln suspendiert ist. Als Verdünnungsmittel werden Mineralöle, Paraffin, Teer- oder Kohlehydrierungsprodukte, Siliconöle oder die höhersiedenden Anteile eines vorhergehenden Ansatzes empfohlen.Process for the preparation of alkylchlorosilanes in patent 887,343 a process for the preparation of alkylchlorosilanes is described in which one Alkyl chlorides or mixtures of olefins and hydrogen chloride gas at about aoo to 35o °, if necessary in the presence of catalysts, act on silicon powder leaves that in indifferent diluents which are liquid under the reaction conditions is suspended. Mineral oils, paraffin, tar or carbohydrate products are used as diluents, Silicone oils or the higher-boiling parts of a previous approach are recommended.

Es wurde nun Befunden, daß man als Verdünnungsmittel bei dieser Umsetzung mit besonderem Vorteil Schmelzen von Metallchloriden verwenden kann. Es eignen sich sowohl einfache Metallchloride, die bei etwa aoo bis 35o° schmelzen, wie auch besonders Salzgemische, z. B. Mischschmelzen von Lithium- und Kaliumchlorid, von Natrium- und Aluminiumchlorid oder von Zink-, Kalium- und Natriumchlorid. Das jeweils günstigste Mischungsverhältnis läßt sich durch Vorversuche leicht ermitteln.It has now been found that as a diluent in this reaction can use melts of metal chlorides with particular advantage. It are suitable both simple metal chlorides, which melt at about aoo to 35o °, as well as especially Salt mixtures, e.g. B. Mixed melts of lithium and potassium chloride, of sodium and aluminum chloride or of zinc, potassium and sodium chloride. The cheapest in each case The mixing ratio can easily be determined through preliminary tests.

Im übrigen verfährt man, wie im Hauptpatent beschrieben.The rest of the procedure is as described in the main patent.

Die im Beispiel genannten Teile sind Gewichtsteile.The parts mentioned in the example are parts by weight.

Beispiel Man trägt in eine Schmelze aus 375 Teilen Zinkchlorid, ioo Teilen Kaliumchlorid und 75 Teilen Natriumchlori.d ioo Teile Siliciumpulve.r, io Teile Kupferpulver und 0,5 Teile Zinkstaub ein und leitet bei a9o° unter 3 atü Methylchlorid ein. Zum Reaktionsgemisch kann laufend oder in Abständen jeweils frisches Siliciumpulver nach Maßgabe des Siliciumverbrauchs zugegeben werden. EXAMPLE 100 parts of silicon powder, 10 parts of copper powder and 0.5 part of zinc dust are introduced into a melt of 375 parts of zinc chloride, 100 parts of potassium chloride and 75 parts of sodium chloride, and methyl chloride is introduced at 90 ° under 3 atmospheres. Fresh silicon powder can be added continuously or at intervals to the reaction mixture in accordance with the silicon consumption.

Bei der Aufarbeitung erhält man in nahezu quantitativer Ausbeute, berechnet auf das verbrauchte Silicium, ein flüssiges Gemisch von Siliciumverbindungen, das man durch fraktionierte Destillation in folgende Anteile zerlegen kann: 2% Si C14, I5 % H3 C-Si H C12, 25 % H3 C-Si C13, 400/0 (H3 C) 2 S' Cl2, 6% (H3 C) 3 Si Cl und I2 % höhersiedende Anteile.In the work-up one obtains in an almost quantitative yield, calculated on the consumed silicon, a liquid mixture of silicon compounds, which can be broken down into the following proportions by fractional distillation: 2% Si C14, 15% H3 C-Si H C12, 25% H3 C-Si C13, 400/0 (H3 C) 2 S 'Cl2, 6% (H3 C) 3 Si Cl and I2% higher boiling fractions.

Claims (1)

PATENTANSPRUCH: Weiterbildung des Verfahrens des Patents 887 343 zur Herstellung von Alkylchlorsilanen durch Einwirkenlassen von Alkylchloriden oder Gemischen aus Olefinen und Chlorwasserstoffgas, gegebenenfalls in Anwesenheit von Katalysatoren, bei Zoo bis 35o° auf Siliciumpulver, das in indifferenten, unter den Reaktionsbedingungen flüssigen Verdünnungsmitteln suspendiert ist, dadurch gekennzeichnet, daß man hier als Verdünnungsmittel geschmolzene Metallchloride oder Gemische aus solchen verwendet.PATENT CLAIM: Further development of the process of patent 887 343 for the production of alkylchlorosilanes by allowing alkyl chlorides or mixtures of olefins and hydrogen chloride gas to act, if necessary in the presence of catalysts, at up to 35o ° on silicon powder, which is suspended in inert diluents that are liquid under the reaction conditions, characterized in that molten metal chlorides or mixtures of such are used here as diluents.
DEB21379A 1952-07-27 1952-07-27 Process for the preparation of alkylchlorosilanes Expired DE920187C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEB21379A DE920187C (en) 1952-07-27 1952-07-27 Process for the preparation of alkylchlorosilanes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB21379A DE920187C (en) 1952-07-27 1952-07-27 Process for the preparation of alkylchlorosilanes

Publications (1)

Publication Number Publication Date
DE920187C true DE920187C (en) 1954-11-15

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
DEB21379A Expired DE920187C (en) 1952-07-27 1952-07-27 Process for the preparation of alkylchlorosilanes

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2904574A (en) * 1955-07-13 1959-09-15 Onera (Off Nat Aerospatiale) Preparation of organo-halo-silanes
US2917529A (en) * 1956-07-10 1959-12-15 Du Pont Preparation of alkyl chlorosilanes
WO1992019626A1 (en) * 1991-05-09 1992-11-12 Bayer Aktiengesellschaft Finely divided silicon incorporating a surface-bound halogen, a process for its manufacture and the use thereof
US7153991B2 (en) 2000-12-01 2006-12-26 General Electric Company Rochow-Müller direct synthesis using nanosized copper catalyst precursors
US7495120B2 (en) 2001-01-31 2009-02-24 Momentive Performance Materials Inc. Nanosized copper catalyst precursors for the direct synthesis of trialkoxysilanes
US7858818B2 (en) 2001-01-31 2010-12-28 Momentive Performance Materials Inc. Nanosized copper catalyst precursors for the direct synthesis of trialkoxysilanes
DE102010063446A1 (en) 2010-12-17 2012-06-21 Wacker Chemie Ag Direct synthesis of alkylchlorosilanes in a liquid reaction medium

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2904574A (en) * 1955-07-13 1959-09-15 Onera (Off Nat Aerospatiale) Preparation of organo-halo-silanes
US2917529A (en) * 1956-07-10 1959-12-15 Du Pont Preparation of alkyl chlorosilanes
WO1992019626A1 (en) * 1991-05-09 1992-11-12 Bayer Aktiengesellschaft Finely divided silicon incorporating a surface-bound halogen, a process for its manufacture and the use thereof
US7153991B2 (en) 2000-12-01 2006-12-26 General Electric Company Rochow-Müller direct synthesis using nanosized copper catalyst precursors
US7495120B2 (en) 2001-01-31 2009-02-24 Momentive Performance Materials Inc. Nanosized copper catalyst precursors for the direct synthesis of trialkoxysilanes
US7858818B2 (en) 2001-01-31 2010-12-28 Momentive Performance Materials Inc. Nanosized copper catalyst precursors for the direct synthesis of trialkoxysilanes
US8513449B2 (en) 2001-01-31 2013-08-20 Momentive Performance Materials, Inc. Nanosized copper catalyst precursors for the direct synthesis of trialkoxysilanes
DE102010063446A1 (en) 2010-12-17 2012-06-21 Wacker Chemie Ag Direct synthesis of alkylchlorosilanes in a liquid reaction medium
WO2012080067A1 (en) 2010-12-17 2012-06-21 Wacker Chemie Ag Direct synthesis of alkylchlorosilanes in a liquid reaction medium

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