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    • 96. 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。
    • 97. 发明授权
    • Process for isolating tetrahydrofuran
    • 四氢呋喃分离方法
    • US09186599B2
    • 2015-11-17
    • US13235427
    • 2011-09-18
    • Maria Guixa GuardiaRolf PinkosNadja PollmerWolf-Steffen WeisskerHugues Vandenmersch
    • Maria Guixa GuardiaRolf PinkosNadja PollmerWolf-Steffen WeisskerHugues Vandenmersch
    • C07D307/00B01D3/14B01D3/36C07D307/36
    • B01D3/143B01D3/36C07D307/36
    • A process which isolates tetrahydrofuran from a stream of tetrahydrofuran, alkanol and high boilers, by: (a) separating off a first stream of tetrahydrofuran and alkanol as azeotrope in a first distillation stage; (b) feeding part of the first stream into a reactor for esterifying maleic anhydride, giving a second stream of tetrahydrofuran and monoalkyl maleate; (c) separating the second stream into a third stream of monoalkyl maleate and a fourth stream of tetrahydrofuran in a second distillation stage; (d) feeding the fourth stream of tetrahydrofuran from the second distillation stage and the part of the first stream from (a) which is not fed to the reactor into a third distillation stage to obtain a product stream of tetrahydrofuran and a sixth stream of tetrahydrofuran and alkanol; (e) recirculating the sixth stream from the third distillation stage into the first distillation stage or the reactor in (b).
    • 通过以下步骤分离四氢呋喃与四氢呋喃,烷醇和高沸点物流的方法:(a)在第一蒸馏阶段中分离第一流的四氢呋喃和链烷醇作为共沸物; (b)将第一流的一部分进料到用于酯化马来酸酐的反应器中,得到第二股四氢呋喃和马来酸单烷基酯; (c)在第二蒸馏阶段将第二物流分离成马来酸单烷基酯和第四四氢呋喃流; (d)将来自第二蒸馏阶段的第四个四氢呋喃流和来自(a)的未进料到反应器中的第一个物流部分进入第三个蒸馏阶段以获得四氢呋喃的产物流和第六个四氢呋喃流 和链烷醇; (e)将第六流从第三蒸馏段再循环到第一蒸馏阶段或(b)中的反应器中。