Use of ultra-low sodium silica-aluminas in the alkylation of aro

Organic compounds -- part of the class 532-570 series – Organic compounds – Fatty compounds having an acid moiety which contains the...

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554 89, 554 97, 252553, 252556, 252558, 562 79, 562 82, 562 88, 562 91, 562 94, 562 95, 562 99, 568631, 568632, 568658, 568731, 568732, 568734, 568736, 568766, 568780, 568781, 568785, 568790, 585455, 585456, C07C 4100, C07C 3912, C07C 264, C07C 15107

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053027329

ABSTRACT:
Silica-aluminas having a sodium content less than about 0.1 weight percent show increased stability when used as a catalyst for the alkylation of aromatic compounds. Where such silica-aluminas are used as the catalyst in detergent alkylation their increased stability permits continuous alkylation to be performed at lower temperatures, as a result of which the detergent alkylate product shows an incrementally higher linearity. Fluorided silica-aluminas having a sodium content of under 0.05 weight percent are particularly advantageous.

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Kurosaki et al, "Effect of Surface Fluorination with CClF.sub.3 on Catalytic Activity of SiO.sub.2 -Al.sub.2 O .sub.3 for Alkylation of Benzene with Propine", Bull Chem Soc. Japan, 63,2363 (1990).
Kirosaki et al, "Effect of Surface Treatment with CHClF.sub.2 on Catalytic Behavior of SiO.sub.2 -Al.sub.2 O.sub.3 and Al.sub.2 O.sub.3 ", Chemistry Letters, pp. 589-592 (1991).
R. A. Myers, "Petroleum Refining Processes", 4-36 to 4-38. (McGraw-Hill Book Company), 1986.

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