TY  - JOUR
A1  - Santowski, Tobias
A1  - Sturm, Alexander Gregor
A1  - Lewis, Kenrick M.
A1  - Felder, Thorsten
A1  - Holthausen, Max C.
A1  - Auner, Norbert
T1  - Disilane cleavage with selected alkali and alkaline earth metal salts
T2  - Chemistry - a European journal
N2  - The industry‐scale production of methylchloromonosilanes in the Müller–Rochow Direct Process is accompanied by the formation of a residue, the direct process residue (DPR), comprised of disilanes MenSi2Cl6‐n (n=1–6). Great research efforts have been devoted to the recycling of these disilanes into monosilanes to allow reintroduction into the siloxane production chain. In this work, disilane cleavage by using alkali and alkaline earth metal salts is reported. The reaction with metal hydrides, in particular lithium hydride (LiH), leads to efficient reduction of chlorine containing disilanes but also induces disproportionation into mono‐ and oligosilanes. Alkali and alkaline earth chlorides, formed in the course of the reduction, specifically induce disproportionation of highly chlorinated disilanes, whereas highly methylated disilanes (n>3) remain unreacted. Nearly quantitative DPR conversion into monosilanes was achieved by using concentrated HCl/ether solutions in the presence of lithium chloride.
KW  - alkali and alkaline earth metal salts
KW  - isilane cleavage
KW  - lithium chloride
KW  - lithium hydride
KW  - monosilanes
Y1  - 2019
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/56494
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-564940
SN  - 1521-3765
VL  - 25
IS  - 57
SP  - 13202
EP  - 13207
PB  - Wiley-VCH Verlag GmbH & Co. KGaA
CY  - Weinheim
ER  -