Catalytic dehydration of alcohols and ethers over a ternary mixed oxide

摘要

A ternary V—Ti—P mixed oxide is shown to catalytically dehydrate 2-methyl-tetrahydrofuran in high conversion to give piperylene, in good yield. Volatile products collected from this reaction contain piperylene in concentrations as high as 80 percent by weight. Dehydration of glycerol to acrolein in high conversion and moderate selectivity is also demonstrated. The catalyst is also shown to dehydrate other alcohols and ether substrates. The catalyst is resistant to deactivation and maintains activity between runs.

主权项

1. A process for the dehydration of an oxygenated organic compound, comprising reacting the organic compound in the presence of a vanadium-titanium-phosphorus oxide catalyst to thereby dehydrate said organic compound to produce a diene,
wherein the titanium component is a residue of a water-soluble organo-titanium compound comprising titanium(IV) bis(ammonium lactate)dihydroxide; wherein the oxygenated organic compound is selected from the group consisting of tetrahydrofuran, dihydrofuran, 1,2-cyclopentane diol, 1,3-cyclopentane diol, tetrahydropyran, dihydropyran, 2-methyl-tetrahydrofuran, 3-methyl-tetrahydrofuran, 2-methyl-tetrahydropyran, 3-methyl-tetrahydropyran, 1,2-cyclohexane diol, 1,3-cyclohexane diol, and 1,4-cyclohexane diol; and wherein the catalyst has the formula VTiaPbOc, wherein a=0.3 to 6.0, b=2.0 to 13.0, and c is the number of atoms required to satisfy the valences of the components other than oxygen.