| 摘要 |
Synthesis of aldehyde (I) involves reacting carboxylic acid (II) or its ester with hydrogen and water in gaseous phase, in the presence of a catalyst containing at least 60-99.9 weight% (wt.%) of zirconium oxide and 20 wt.% or less of lanthanides as catalyst active ingredients. Synthesis of aldehyde of formula (I) involves reacting carboxylic acid of formula (II) or its ester with hydrogen and water in the presence of a catalyst containing at least 60-99.9 wt.% of zirconium oxide and 20 wt.% or less of lanthanides as catalyst active ingredients. R<1>, R<2>, R<3>, R<4> = hydrogen, 1-6C alkyl, 3-8C cycloalkyl, aryl, 7-12C alkylphenyl or 7-12C phenylalkyl, preferably R<1>, R<2> together form 3-7C alicyclic ring, and preferably R<1>, R<3> = 1-4C alkoxy, phenoxy, methylamino, dimethylamino or halogen, more preferably R<1> = hydroxy or amino.
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