Method for selective adsorption of dienes

Details Method for selective adsorption of dienes Method for selective adsorption of dienes

C - Chemistry, Metallurgy

07

C

C07C 7/13 (2006.01)

Patent

CA 2347832

The invention provides specific adsorbents and methods for separating an unsaturated hydrocarbon from a mixture containing such hydrocarbon. The adsorbents and methods are useful for separating dienes from mono-olefins. The adsorbents are selected from: a) an ion-exchanged zeolite selected from the group consisting of zeolite X, zeolite Y, and zeolite LSX, said zeolite having exchangeable cationic sites, and a plurality of said sites having silver cation or copper cation present; b) type A zeolite having exchangeable cationic sites, a plurality of said A zeolite sites having an alkali metal cation or an alkaline earth metal cation present.

Cette invention se rapporte à des adsorbants spécifiques et à des procédés servant à séparer un hydrocarbure insaturé d'un mélange contenant un tel hydrocarbure. Ces absorbants et ces procédés servent à séparer des diènes de mono-oléfines. Ces absorbants sont choisis entre: (a) une zéolite à échange d'ions, choisie dans le groupe constitué par la zéolite X, la zéolite Y et la zéolite LSX, cette zéolite contenant des sites cationiques échangeables et un cation d'argent ou un cation de cuivre étant présents sur plusieurs de ces sites; (b) une zéolite de type A ayant des sites cationiques échangeables, un cation de métal alcalin ou un cation de métal alcalino-terreux étant présents sur plusieurs des sites de cette zéolite A.

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