Process for the chlorination of methylsilanes
AssigneeWacker Chemie AG
InventorsHelmut Hollfelder, Siegfried Pflaum, Franz Riener
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Abstract
The invention relates to a process for the chlorination of methylsilanes, which comprises reacting methylsilanes with chlorine in the presence of at least 0.1% by weight of hydrogen chloride, based on the weight of methylsilane of the formula (II), under the action of electromagnetic radiation which induces chlorination, chlorine being used in a substoichiometric amount based on the methylsilane of the formula (II), and the reaction being carried out at temperatures below the boiling point of the methylsilane of the formula (II). The invention further relates to an apparatus suitable for carrying out the chlorination of an industrial scale.
Claims9
A process for preparing silanes which contain chloromethyl groups and have the formula
- (ClyCH3−y)a(CH3)bSiCl4−a−b
- where
- y is 1, 2 or 3,
- a is 1, 2, 3, or 4,
- b is 0, 1, 2 or 3, with the proviso that the sum a+b is 1, 2, 3 or 4,
- which comprises reacting methylsilanes of the formula
- (CH3)a+bSiCl4−(a+b) (II),
- with chlorine in the presence of at least 0.1% by weight of hydrogen chloride, based on the weight of methylsilane of the formula (II), under the action of electromagnetic radiation which promotes chlorination, chlorine present in a substoichiometric amount based on the methylsilane of the formula (II), and the reaction carried out at temperatures below the boiling point of the methylsilane of the formula (II).
Dependencies are inferred from the claim text.