Preparation of alkylphenols
    8.
    发明授权
    Preparation of alkylphenols 失效
    烷基酚的制备

    公开(公告)号:US5817891A

    公开(公告)日:1998-10-06

    申请号:US715830

    申请日:1996-09-19

    IPC分类号: C07C37/07

    CPC分类号: C07C37/07

    摘要: A process for the preparation of alkylphenols of the formula I ##STR1## in which R.sup.1, R.sup.2, R.sup.3, R.sup.4, and R.sup.5 stand for hydrogen or C.sub.1 -C.sub.8 alkyl, by reaction of an alkylcyclohex-2-en-1-one of the formula II ##STR2## in which R.sup.1, R.sup.2, R.sup.3, R.sup.4, and R.sup.5 have the aforementioned meanings, at temperatures of from 200.degree. to 400.degree. C. and pressures ranging from 0.01 to 50 bar in the presence of palladium-on-.alpha.-Al.sub.2 O.sub.3 catalysts, wherein the catalyst used has a specific surface area (BET) of from 1 to 10 m.sup.2 /g, a pore diameter of from 5 nm to 300 .mu.m and a pore volume of from 0.1 to 0.5 cm.sup.3 /g, from 80 to 100% of the pores having a diameter of from 40 to 400 nm, and also novel palladium-on-.alpha.-Al.sub.2 O.sub.3 catalysts as obtained from a fine-grained alumina powder by steps of molding, pyrolysis and calcination.

    摘要翻译: 通过烷基环己-2-烯-1-酮的反应制备式I的烷基酚的方法,其中R 1,R 2,R 3,R 4和R 5代表氢或C 1 -C 8烷基, 其中R 1,R 2,R 3,R 4和R 5具有上述含义的式II(II)中的一种,在200-400℃的温度和0.01至50巴的压力下, 的钯 - α-Al 2 O 3催化剂,其中使用的催化剂具有1至10m 2 / g的比表面积(BET)为1至10m 2 / g,孔径为5nm至300μm,孔体积为0.1至 0.5cm 3 / g,直径为40〜400nm的孔的80〜100%,以及由细晶粒状氧化铝粉末得到的新型钯 - α-Al 2 O 3催化剂,其通过成型,热解和 煅烧。