Preparation of methyl isobutyl ketone
AssigneeIndustrial Technology Research Institute
InventorsPo-Yu Chen, Shiao-Jung Chu, Kuo-Ching Wu, Wen-Chyi Lin
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Abstract
A one-step process for selective production of methyl isobutyl ketone includes reacting in the vapor/liquid phase acetone and hydrogen at a temperature of about 100.degree. to 300.degree. C. and a pressure of about 100 to 1000 psig, in the presence of a modified ZSM-5 catalyst having a molar ratio of SiO.sub.2 /Al.sub.2 O.sub.3 from about 20:1 to 680:1, the catalyst being prepared by treating a ZSM-5 zeolite with an organic acid having a pKa of 2 to 5, ion-exchanging or impregnating the ZSM-5 zeolite with a cation selected from the group consisting of palladium cation, platinum cation, copper cation and nickel cation, and activating the resultant catalyst in a reducing atmosphere.
Claims5
A process for the selective production of methyl isobutyl ketone, which comprises:
- reacting in the vapor/liquid phase acetone and hydrogen at a temperature of about 130.degree. to 180.degree. C. and a pressure of about 100 to 1000 psig, in the presence of a ZSM-5 zeolite having a molar ratio of SiO.sub.2 /Al.sub.2 O.sub.3 from about 20:1 to 680:1, wherein said catalyst is prepared by soaking a ZSM-5 zeolite with an organic acid having a pKa of 2 to 5, wherein said organic acid is selected from the group consisting of citric acid, tartaric acid, acetic acid, formic acid, benzoic acid or maleic acid, so as to form secondary pores, ion-exchanging or impregnating the soaked ZSM-5 zeolite with a palladium, platinum, copper or nickel cation, and activating the resulting catalyst with hydrogen or a mixture of hydrogen and nitrogen at a temperature of 150.degree. to 600.degree. C. for 4 to 24 hours.
Dependencies are inferred from the claim text.