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:
Apr. 16, 2002
Filed:
Jul. 26, 2000
Ahmad Mehdi, Montpellier, FR;
Franck Denat, Dijon, FR;
Frédéric Barbette, Dijon, FR;
Roger Guilard, Fontaine les Dijon, FR;
Gilles Lagrange, Forges les Bains, FR;
Other;
Abstract
The invention concerns a method for preparing polyazacycloalkanes immobilised on a silica gel from a polyazacycloalkane of formula (A) in which: R and R represent a hydrogen atom, an alkyl radical, or a [hetero(aryl)]alkyl radical; W , W and W represent a radical of formula (B): —[(CT T ) —[N(R )] —(CT T ) ] — such as defined in the description; R represents a hydrogen atom, an alkyl radical or a [hetero(aryl)]alkyl radical, provided that the polyazacycloalkane ring of the compound of formula (A) comprises not more than 30 cyclic carbon atoms, and not more than 6 cyclic nitrogen atoms. The invention is characterised in that: (a) the compound of formula (A) is reacted with a compound of formula (C): Z—R —Si(X )(X )(X ), such as defined in the description to form a compound of formula (D); (b) said compound of formula (D) is condensed on the silanol sites of a silica gel to form the immobilised polyazacycloalkane of formula (E); and (c) some ethanol sites having not reacted are, if required, protected by Z′, a group protecting the hydroxyl function. The invention is useful for separating oxygen from air.