MICROPOROUS MOLECULAR SEPARATION MEMBRANE WITH HIGH HYDROTHERMAL STABILITY

A hydrothermally stable, microporous organic-inorganic hybrid membrane based on silica, having an mean pore diameter of between 0.2 and 1.5 nm, is characterised in that between 5 and 40 mole % of the Si-O-Si bonds have been replaced by moieties having the one of the formulas: Si-{[CmH(n-1)X]-Si-}q,...

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Bibliographische Detailangaben
Hauptverfasser:	SAH, ASHIMA, CASTRICUM, HESSEL LENNART, TEN ELSHOF, JOHAN EVERT, VENTE, JAAP FERDINAND, BLANK, DAVID HERMANUS ADRIANUS
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING
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Beschreibung
Zusammenfassung:	A hydrothermally stable, microporous organic-inorganic hybrid membrane based on silica, having an mean pore diameter of between 0.2 and 1.5 nm, is characterised in that between 5 and 40 mole % of the Si-O-Si bonds have been replaced by moieties having the one of the formulas: Si-{[CmH(n-1)X]-Si-}q, Si-[CmH(n-2)X2]-Si or Si-CmHn-Si{(CmHn)-Si-}y in which m=1-8, n=2m, 2m−2, 2m−4, 2m−6 or 2m−8; provided that n 2, X=H or (CH2)pSi, p=0 or 1, and q=1, 2, 3 or 4. The membrane can be produced by acid-catalysed hydrolysis of suitable bis-silane precursors such as bis(trialkoxysily)alkanes, preferably in the presence of monoorganyl-silane precursors such as trialkoxy-alkylsilanes.