Tri:organo-mono:chloro-silane cpds. prodn. - by reacting hexa:organo-di:siloxane cpds. with hydrogen chloride under pressure, useful for silicone prodn

Prodn. of triorgano-monochloro-silanes (I) of the formula R3SiCl by reacting hexaorganodisiloxanes (II) of the formula (R3Si)20 (in which the R gps. independently are opt. substd. 1-12C hydrocarbyl gps.) with HCl is carried out at elevated HCl pressure. Pref. (II) is hexamethyldisiloxane (IIA). Pref...

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Hauptverfasser:	MAAS,GUENTHER,.DR, BRAENDLE,KARL,.DR
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creator	MAAS,GUENTHER,.DR BRAENDLE,KARL,.DR
description	Prodn. of triorgano-monochloro-silanes (I) of the formula R3SiCl by reacting hexaorganodisiloxanes (II) of the formula (R3Si)20 (in which the R gps. independently are opt. substd. 1-12C hydrocarbyl gps.) with HCl is carried out at elevated HCl pressure. Pref. (II) is hexamethyldisiloxane (IIA). Pref. the HCl pressure is 1.1-40 bar and the reaction temp. -15 to +20 deg.C. Quantitative reaction takes place without addn. of dehydrating salts (I) are useful starting materials for silicones. In an example, a 4 l autoclave was charged at room temp. with 1000 g (IIA) and HCl to a pressure kept at 15 bar for 3 hr. The lower phase consisted of concn. HCl, whilst the upper phase contained 99.4% Me3SiCl.
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Pref. (II) is hexamethyldisiloxane (IIA). Pref. the HCl pressure is 1.1-40 bar and the reaction temp. -15 to +20 deg.C. Quantitative reaction takes place without addn. of dehydrating salts (I) are useful starting materials for silicones. In an example, a 4 l autoclave was charged at room temp. with 1000 g (IIA) and HCl to a pressure kept at 15 bar for 3 hr. The lower phase consisted of concn. 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Pref. (II) is hexamethyldisiloxane (IIA). Pref. the HCl pressure is 1.1-40 bar and the reaction temp. -15 to +20 deg.C. Quantitative reaction takes place without addn. of dehydrating salts (I) are useful starting materials for silicones. In an example, a 4 l autoclave was charged at room temp. with 1000 g (IIA) and HCl to a pressure kept at 15 bar for 3 hr. The lower phase consisted of concn. 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Pref. (II) is hexamethyldisiloxane (IIA). Pref. the HCl pressure is 1.1-40 bar and the reaction temp. -15 to +20 deg.C. Quantitative reaction takes place without addn. of dehydrating salts (I) are useful starting materials for silicones. In an example, a 4 l autoclave was charged at room temp. with 1000 g (IIA) and HCl to a pressure kept at 15 bar for 3 hr. The lower phase consisted of concn. HCl, whilst the upper phase contained 99.4% Me3SiCl.</abstract><oa>free_for_read</oa></addata></record>
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subjects	ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAININGELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN,SULFUR, SELENIUM OR TELLURIUM CHEMISTRY METALLURGY ORGANIC CHEMISTRY
title	Tri:organo-mono:chloro-silane cpds. prodn. - by reacting hexa:organo-di:siloxane cpds. with hydrogen chloride under pressure, useful for silicone prodn
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