| 摘要 |
The liquid phase used in the preparation of ketones, comprising reacting aldehydes, alcohols, acids or esters in the presence of a solvent is new. A process for the preparation of a ketone of formula (I), A- C(O)-B in which A and B independently are aliphatic hydrocarbyl, aromatic or carbocyclic (all saturated and optionally substituted). The process comprises the reaction, at 250-500 deg C, of a compound(II), A-X, with a compound(III), B-Y, in which; A and B are as defined above and X and Y independently are OH, COOH, -COH or ester; in a heat carrying solvent of boiling point greater than 250 deg C, and in the presence of a catalyst comprising at least one compound of an alkali or alkaline earth metal, a lanthanide, Si, Al, Zn, Cu, Ni, Co, Fe, Mo, Mn, Cr, V, Ti, Zr, U, Rh, Tl, Ag, Cd, Cd, Pb Sc or Th, in which the element is a divalent state or of higher valence. |
