EP 3230206 A1 20171018 - METHOD FOR RECOVERING HEXACHLORODISILANE FROM CHLOROSILANE MIXTURES IN PROCESS OFFGAS STREAMS
Title (en)
METHOD FOR RECOVERING HEXACHLORODISILANE FROM CHLOROSILANE MIXTURES IN PROCESS OFFGAS STREAMS
Title (de)
VERFAHREN ZUR GEWINNUNG VON HEXACHLORDISILAN AUS IN PROZESSABGASSTRÖMEN ENTHALTENEN GEMISCHEN VON CHLORSILANEN
Title (fr)
PROCÉDÉ POUR LA PRODUCTION D'HEXACHLORODISILANE À PARTIR DE MÉLANGES DE CHLOROSILANES CONTENUS DANS DES FLUX D'EFFLUENTS GAZEUX DE PROCÉDÉ
Publication
Application
Priority
- DE 102014018435 A 20141210
- DE 2015000562 W 20151120
Abstract (en)
[origin: WO2016091240A1] The invention pertains to a method for recovering hexachlorodisilane from mixtures, present within process offgas streams, of chorosilanes of the general formula SixHyCl2x+2-y, where x = 1 and y = 0 - 3 and x = 2 and y = 0 - 5. The problem addressed by the present invention is therefore that of providing a method to allow high-yield isolation of the hexachlorodisilane from the aforesaid chlorosilane mixtures arising in the thermal reaction of hydrogen with monosilanes of the general formula SixHyCl2x+2-y, where x is 1 and y is 0 - 2. The problem is solved by a method for recovering hexachlorodisilane from mixtures, present within process offgas streams, of chorosilanes of the general formula SixHyCl2x+2-y, where x = 1 and y = 0 - 3 and x = 2 and y = 0 - 5, which is characterized in that the offgas streams or fractions thereof are converted to the liquid phase and then the partially hydrogenated chlorodisilanes of the general formula SixHyCl2x-2y-1 (x = 2, y = 1 - 5) that are in the chlorosilane mixture are additionally reacted catalytically to hexachlorodisilane, which is isolated from the resulting mixture by distillation.
IPC 8 full level
C01B 33/107 (2006.01)
CPC (source: CN EP KR)
B01J 31/0237 (2013.01 - KR); B01J 31/0239 (2013.01 - KR); C01B 33/107 (2013.01 - EP); C01B 33/10773 (2013.01 - CN); C01B 33/10778 (2013.01 - CN KR)
Citation (search report)
See references of WO 2016091240A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
WO 2016091240 A1 20160616; CN 107207267 A 20170926; DE 102014018435 A1 20160616; EP 3230206 A1 20171018; KR 20170091623 A 20170809
DOCDB simple family (application)
DE 2015000562 W 20151120; CN 201580075776 A 20151120; DE 102014018435 A 20141210; EP 15825916 A 20151120; KR 20177015427 A 20151120