The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 02, 2012
Filed:
Jan. 16, 2007
Ashima Sah, Calcutta, IN;
Hessel Lennart Castricum, Amsterdam, NL;
Jaap Ferdinand Vente, Alkmaar, NL;
David Hermanus Adrianus Blank, Enschede, NL;
Johan Evert Ten Elshof, Enschede, NL;
Ashima Sah, Calcutta, IN;
Hessel Lennart Castricum, Amsterdam, NL;
Jaap Ferdinand Vente, Alkmaar, NL;
David Hermanus Adrianus Blank, Enschede, NL;
Johan Evert Ten Elshof, Enschede, NL;
Stichting Energieonderzoek Centrum Nederland, Petten, NL;
Abstract
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pore diameter of between 0.2 and 1.5 nm, is characterised in that between 5 and 40 mole % of the Si—O—Si bonds have been replaced by moieties having the one of the formulas: Si—{[CH()X]—Si—}, Si—[CH()X]—Si or Si—CH—Si{(CH)—Si—}in which m=1-8, n=2m, 2m−2, 2m−4, 2m−6 or 2m−8; provided that n≧2, X=H or (CH)Si, 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.