Removal of polar contaminants from aromatic feedstocks

Details Removal of polar contaminants from aromatic feedstocks Removal of polar contaminants from aromatic feedstocks

C - Chemistry, Metallurgy

07

B

C07B 63/00 (2006.01) C07C 7/13 (2006.01) C07C 15/02 (2006.01)

Patent

CA 2419847

A process for removing polar compounds from an aromatic feedstock containing polar compounds comprising the steps of: (a) contacting the feedstock in an adsorption zone with an adsorbent selective for the adsorption of said polar compounds, said adsorbent comprising a molecular sieve having pores and/or surface cavities with cross-sectional dimensions greater than 5.6 Angstroms and said adsorption zone being at a temperature of less than or equal to 130 ~C; and (b) withdrawing from said adsorption zone a treated feedstock which is substantially free of said polar compounds. The resultant treated feedstock is fed to an alkylation zone for contact under liquid phase alkylation conditions with an alkylating agent in the presence of an alkylation catalyst.

L'invention concerne un procédé permettant d'éliminer des composés polaires d'une charge d'alimentation aromatique contenant des composés polaires, consistant (a) à mettre en contact dans une zone d'adsorption la charge d'alimentation avec un adsorbant sélectif pour l'adsorption desdits composés polaires, ledit adsorbant comprenant un tamis moléculaire présentant des pores et/ou des cavités de surface avec des dimensions transversales supérieures à 5,6 Angströms et ladite zone d'adsorption étant à une température inférieure ou égale à 130 ·C; et (b) à retirer de ladite zone d'adsorption une charge d'alimentation traitée ne contenant sensiblement pas de composés polaires. La charge d'alimentation traitée obtenue est injectée dans une zone d'alkylation pour venir en contact dans des conditions d'alkylation en phase liquide avec un agent d'alkylation en présence d'un catalyseur d'alkylation.

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