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    • 9. 发明授权
    • Method for the production of 1,4- butane-diol by combined gas-phase and liquid-phase hydrogenation
    • 通过组合气相和液相氢化生产1,4-丁二醇的方法
    • US07169958B2
    • 2007-01-30
    • US10516923
    • 2003-06-10
    • Michael HesseStephan SchlitterHolger BorchertMarkus SchubertMarkus RöschNils BottkeRolf-Hartmuth FischerAlexander WeckGunther WindeckerGunnar Heydrich
    • Michael HesseStephan SchlitterHolger BorchertMarkus SchubertMarkus RöschNils BottkeRolf-Hartmuth FischerAlexander WeckGunther WindeckerGunnar Heydrich
    • C07C29/132C07C29/149C07C29/136C07C29/147
    • C07C29/149C07C31/207
    • The present invention relates to a process for preparing optionally alkyl-substituted 1,4-butanediol by two-stage catalytic hydrogenation in the gas phase of C4-dicarboxylic acids and/or of derivatives thereof having the following steps: a) introducing a gas stream of a C4-dicarboxylic acid or of a derivative thereof at from 200 to 300° C. and from 2 to 60 bar into a first reactor and catalytically hydrogenating it to a product which contains mainly optionally alkyl-substituted γ-butyrolactone; b) converting the product stream into the liquid phase; c) introducing the product stream obtained in this way into a second reactor at a temperature of from 100° C. to 240° C. and a pressure of from 20 to 250 bar and catalytically hydrogenating it in the liquid phase to optionally alkyl-substituted 1,4-butanediol; d) removing the desired product from by-products and any unconverted reactants; e) optionally recycling unconverted intermediates into one or both hydrogenation stages, said hydrogenation stages both using a catalyst which comprises ≦95% by weight, preferably from 5 to 95% by weight, in particular from 10 to 80% by weight, of CuO, and ≧5% by weight, preferably from 5 to 95% by weight, in particular from 20 to 90% by weight, of a support, said second reactor having a higher pressure than said first reactor, and the product mixture removed from said first reactor being introduced without further purification into said second reactor.
    • 本发明涉及通过在具有下列物质的C 4 - 二羧酸和/或其衍生物的气相中通过两阶段催化氢化制备任选的烷基取代的1,4-丁二醇的方法 步骤:a)将200-300℃和2-60巴的C 4-14二羧酸或其衍生物的气流引入第一反应器,并将其催化氢化至 主要含烷基取代的γ-丁内酯的产品; b)将产物流转化成液相; c)将以这种方式获得的产物流在100℃至240℃的温度和20至250巴的压力下引入第二反应器,并将其在液相中催化氢化为任选的烷基取代的 1,4-丁二醇 d)从副产物和任何未转化的反应物中除去所需的产物; e)任选地将未转化的中间体再循环到一个或两个氢化阶段中,所述氢化步骤均使用包含<= 95重量%,优选5至95重量%,特别是10至80重量%的CuO ,和> = 5重量%,优选5至95重量%,特别是20至90重量%的载体,所述第二反应器具有比所述第一反应器更高的压力,并将产物混合物从 所述第一反应器不经进一步纯化地引入所述第二反应器。