| 摘要 |
PURPOSE:To react a lower fatty acid with a lower olefin in the presence of a compound selected from the Cs salt, Rb salt, Tl salt, ammonium salt and K salt of phosphowolframic acid as a catalyst in a gaseous phase, when the lower fatty acid is esterified with a lower olefin to obtain the subject substance. CONSTITUTION:A lower fatty acid is made to react with a lower olefin in the presence of a compound selected from the Cs salt, Rb salt, Tl salt, ammonium salt and K salt of phosphowolframic acid as a catalyst to obtain the subject substance in high selectivity. The space time yield of the reaction product and the life of the catalyst are high and long, respectively, but the addition of approximately 1vol.% of steam to the raw material gases prolongs the life of the catalyst. The catalyst is prepared by dissolving a commercially available phosphowolframic acid in water, mixing the solution with the nitrate, carbonate, etc., of Cs, Rb, Tl, ammonium or K in a form of powder or an aqueous solution and subsequently thermally evaporating the water. |
