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    • 9. 发明授权
    • Preparation of aldehydes
    • 醛的制备
    • US5679869A
    • 1997-10-21
    • US567749
    • 1995-12-05
    • Werner SchnurrRolf FischerJoachim Wulff-DoringMichael Hesse
    • Werner SchnurrRolf FischerJoachim Wulff-DoringMichael Hesse
    • B01J23/10B01J23/06C07B61/00C07C45/41C07C47/02C07C47/105C07C47/14C07C47/19C07C47/198C07C47/228C07C47/28
    • B01J23/06C07C45/41
    • A process for preparing aldehydes of the general formula I ##STR1## where R.sup.1, R.sup.2 and R.sup.3 are each hydrogen, C.sub.1 -C.sub.6 -alkyl, C.sub.3 -C.sub.8 -cycloalkyl, aryl, C.sub.7 -C.sub.12 -alkylphenyl, C.sub.7 -C.sub.12 -phenylalkyl and R.sup.1 and R.sup.2 are joined together to form a 3-, 4-, 5-, 6- or 7-membered cycloaliphatic ring, R.sup.1 and R.sup.3 are each C.sub.1 -C.sub.4 -alkoxy, phenoxy, methylamino, dimethylamino or halogen, and R.sup.1 is additionally hydroxyl or amino comprises reacting a carboxylic acid or ester of the general formula II ##STR2## where R.sup.1, R.sup.2 and R.sup.3 are each as defined above, and R.sup.4 is hydrogen, C.sub.1 -C.sub.6 -alkyl, C.sub.3 -C.sub.8 -cycloalkyl, aryl, C.sub.7 -C.sub.12 -alkylphenyl or C.sub.7 -C.sub.12 -phenylalkyl, with hydrogen in the gas phase at temperatures from 200.degree. to 450.degree. C. and pressures from 0.1 to 20 bar in the presence of a catalyst whose catalytically active mass comprises from 60 to 99.9% by weight of zirconium oxide and from 0.1 to 40% by weight of one or more elements of the lanthanides.
    • 制备通式I(I)的醛的方法,其中R1,R2和R3各自为氢,C1-C6烷基,C3-C8-环烷基,芳基,C7-C12-烷基苯基,C7-C12- 苯基烷基和R 1和R 2连接在一起形成3-,4-,5-,6-或7-元环脂族环,R 1和R 3各自为C 1 -C 4 - 烷氧基,苯氧基,甲基氨基,二甲基氨基或卤素,R 1 另外羟基或氨基包括使通式II(II)的羧酸或酯与其中R 1,R 2和R 3各自如上所定义,R 4是氢,C 1 -C 6烷基,C 3 -C 8 - 环烷基,芳基,C 7 -C 12 - 烷基苯基或C 7 -C 12 - 苯基烷基,在气相中的氢气在200-450℃的温度和0.1至20巴的压力下,在催化剂存在下,其催化活性质量包含 60至99.9重量%的氧化锆和0.1至40重量%的一种或多种镧系元素。