Organosiliciumverbindungen LIV. Über die direkte Synthese der Methylchlorsilane unter Anwendung von Halbleiter-Silicium

Joklík, J.; Bažant, V.

doi:10.1135/cccc19673803

Cited by 4 publications

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“…In particular, AlCl 3 was found to promote the reaction, leading to a higher production rate [11]. Another explanation is that aluminum is required to increase the vapor pressure of zinc and/or copper under Direct Synthesis reaction conditions, and increased zinc/copper vapor pressure allows the movement of zinc/copper within the contact mass [34][35][36]. Another explanation is that aluminum is required to increase the vapor pressure of zinc and/or copper under Direct Synthesis reaction conditions, and increased zinc/copper vapor pressure allows the movement of zinc/copper within the contact mass [34][35][36].…”

Section: Promoters and Inhibitorsmentioning

confidence: 99%

Müller–Rochow Synthesis: The Direct Process to Methylchlorosilanes

Kalchauer

Pachaly

2008

Handbook of Heterogeneous Catalysis

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The sections in this article are Introduction Formation of Methylchlorosilanes Reaction Mechanism Copper Catalyst Promoters and Inhibitors Reactants and Raw Materials Influence of Temperature and Pressure Applications in the Silicones Industry Industrial Process Parameters and Process Control Course of Production Runs Byproduct Utilization and Waste Treatment Outlook

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Section: Promoters and Inhibitorsmentioning

confidence: 99%

Müller–Rochow Synthesis: The Direct Process to Methylchlorosilanes

Kalchauer

Pachaly

2008

Handbook of Heterogeneous Catalysis

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Die direkte Synthese der Organohalogensilane

1968

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Die direkte Synthese der Organohalogensilane, besonders der Methyl‐ und Phenylchlorsilane, ist der grundlegende Prozeß zur Herstellung der für die Siliconpolymeren benötigten monomeren Verbindungen. Bei dieser komplexen heterogenen katalytischen Reaktion tritt eine gasförmige Komponente (das Organohalogenid) mit zwei festen Komponenten (Silicium und Kupfer), deren Mengenverhältnis sich während des Reaktionsablaufes ändert, in Wechselwirkung. Der Mechanismus der Direktsynthese wurde bisher nicht eindeutig geklärt. Der zuerst vorgeschlagene radikalische Mechanismus setzt die Bildung freier organischer Radikale voraus. Der später eingeführte Chemisorptions‐Mechanismus postuliert hingegen die dissoziative Adsorption des organischen Halogenids am Silicium Kupfer‐Doppelzentrum. Die bisher erhaltenen Resultate deuten darauf hin, daß dem Chemisorptions‐Mechanismus entscheidende Bedeutung zukommt, jedoch ist die gleichzeitige Wirkung beider Mechanismen nicht auszuschließen.

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Direct Synthesis of Organohalogenosilanes

Baźnt

Joklík

Rathouský

1968

Angew. Chem. Int. Ed. Engl.

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The direct synthesis of organohalogenosilanes, particularly methyl‐ and phenylchlorosilanes, is the main process for the production of the monomers required for silicone polymers. This complex heterogeneous catalytic reaction involves the interaction of a gaseous component (the organic halide) with two solid components (silicon and copper), the relative quantities of which change as the reaction proceeds. The mechanism of the direct synthesis has not yet been conclusively established. The free‐radical mechanism originally proposed supposes the formation of organic free radicals. On the other hand, the chemisorption mechanism suggested later postulates the dissociative adsorption of the organic halide on the silicon‐copper double center (the silicon and the copper being joined by a chemical bond). The results obtained so far indicate that the chemisorption mechanism is of decisive importance, but it is not impossible that both mechanisms operate simultaneously.

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Organosiliciumverbindungen LIV. Über die direkte Synthese der Methylchlorsilane unter Anwendung von Halbleiter-Silicium

Cited by 4 publications

References 0 publications

Müller–Rochow Synthesis: The Direct Process to Methylchlorosilanes

Müller–Rochow Synthesis: The Direct Process to Methylchlorosilanes

Die direkte Synthese der Organohalogensilane

Direct Synthesis of Organohalogenosilanes

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