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    • 10. 发明授权
    • Method for producing 1,4-butanediol
    • 生产1,4-丁二醇的方法
    • US06350924B1
    • 2002-02-26
    • US09673134
    • 2000-10-11
    • Rolf FischerGerd KaibelRolf PinkosRalf-Thomas Rahn
    • Rolf FischerGerd KaibelRolf PinkosRalf-Thomas Rahn
    • C07C2700
    • C07D315/00C07C29/177C07D307/08C07C31/207
    • A process for preparing 1,4-butanediol and, if desired, &ggr;-butyrolactone and THF by oxidizing butane or benzene to form a product stream including maleic anhydride, absorbing maleic anhydride from the product stream with a high-boiling inert solvent in an absorption stage to give a liquid absorption product, esterifying the liquid absorption product with a C1-C5 esterifying alcohol in an esterification stage to form an esterification product comprising the corresponding diester and high-boiling inert solvent, then hydrogenating the esterification product to give a hydrogenation product which comprises the products of value, 1,4-butanediol and, if desired, &ggr;-butyrolactone and tetrahydrofuran and the esterifying alcohol and which is separated by distillation into the products of value and the esterifying alcohol, and recycling the esterifying alcohol to the esterification zone, which comprises separating the esterification product into the diester and the inert solvent by distillation under reduced pressure prior to the hydrogenation, recycling the inert solvent to the absorption stage, and hydrogenating the diester in the liquid phase over a fixed-bed catalyst.
    • 通过氧化丁烷或苯来制备1,4-丁二醇和(如果需要的话)γ-丁内酯和THF以形成包含马来酸酐的产物流的方法,在吸收中用高沸点惰性溶剂从产物流中吸收马来酸酐 阶段以得到液体吸收产物,在酯化阶段用C1-C5酯化醇酯化液体吸收产物以形成包含相应的二酯和高沸点惰性溶剂的酯化产物,然后氢化酯化产物得到氢化产物 其包括价值的产物,1,4-丁二醇,如果需要的话,γ-丁内酯和四氢呋喃和酯化醇,并通过蒸馏分离成产物和酯化醇,并将酯化醇再循环到酯化反应 其包括通过蒸馏分离酯化产物成二酯和惰性溶剂 在氢化之前在减压下进行反应,将惰性溶剂循环到吸收阶段,并在固定床催化剂中使液相中的二酯氢化。