公开(公告)号：US06329532B1

公开(公告)日：2001-12-11

申请号：US09622172

申请日：2000-08-14

申请人： Rolf Pinkos ,  Ralf-Thomas Rahn

发明人： Rolf Pinkos ,  Ralf-Thomas Rahn

IPC分类号： C07D30736

CPC分类号： C07C51/573 ,  C07C29/149 ,  C07C67/08 ,  C07C31/207 ,  C07C57/145 ,  C07C69/80

摘要： The invention relates to a process for the separation of maleic anhydride from the maleic anhydride-containing reactor offgases from the preparation of maleic anhydride by the oxidation of hydrocarbons, in which this gas stream is brought into contact with a high-boiling, inert absorbent for maleic anhydride and maleic anhydride is separated from the resultant liquid absorbate phase by vapor stripping, where the stripping agent used is an alcohol, and at least some of the maleic anhydride is reacted with the alcohol to give the ester.

摘要翻译： 本发明涉及一种通过烃的氧化将马来酸酐与马来酸酐反应器脱附从马来酸酐的制备中分离的方法，其中该气流与高沸点惰性吸收剂接触， 马来酸酐和马来酸酐通过蒸汽汽提从所得的液体吸收相分离，其中所用的汽提剂是醇，并且至少一些马来酸酐与醇反应得到酯。

公开(公告)号：US06620949B1

公开(公告)日：2003-09-16

申请号：US10110444

申请日：2002-07-22

申请人： David Mark Sutton ,  Andrew George Hiles ,  Adrian Francis Backes

发明人： David Mark Sutton ,  Andrew George Hiles ,  Adrian Francis Backes

IPC分类号： C07D30736

CPC分类号： C07D315/00 ,  C07C29/149 ,  C07C51/215 ,  C07C51/313 ,  C07C51/573 ,  C07D307/08 ,  C07C31/207 ,  C07C57/145

摘要： A process is described for the co-production of maleic anhydride and at least one C4 compound selected from butane-1,4-diol, &ggr;-butyrolactone, and tetrahydrofuran in which maleic anhydride is produced by partial oxidation of a hydrocarbon feedstock selected from C4 hydrocarbons and benzene to yield a vaporous reaction effluent stream comprising maleic anhydride, water, unconverted hydrocarbon feedstock, and carbon oxides. A part of the maleic anhydride present in the vaporous reaction effluent stream is condensed to form a crude maleic anhydride stream and leave a residual vaporous stream containing residual amounts of maleic anhydride. Further maleic anhydride is absorbed from the residual vaporous stream by absorption in an organic solvent, water or an aqueous solution. Maleic anhydride is then recovered from the loaded liquid absorptions medium. Said at least one C4 compound is produced by hydrogenation of a C4+ hydrogenation feedstock selected from maleic anhydride, maleic acid, dialkyl maleates, and mixtures of two or more thereof. The process is characterised in that material of the crude maleic anhydride stream is used as the C4+ hydrogenation feedstock or is used to prepare the C4+ hydrogenation feedstock.

摘要翻译： 描述了共生产马来酸酐和至少一种选自丁烷-1,4-二醇，γ-丁内酯和四氢呋喃的C4化合物的方法，其中马来酸酐通过部分氧化选自C4的烃原料来制备 烃和苯，产生包含马来酸酐，水，未转化的烃原料和碳氧化物的气态反应流出物流。 存在于气态反应流出物流中的马来酸酐的一部分被冷凝以形成粗马来酸酐流，并留下含有残留量马来酸酐的残余蒸气流。 另外的马来酸酐通过在有机溶剂，水或水溶液中的吸收从残余蒸气流吸收。 然后从负载的液体吸收介质中回收马来酸酐。 所述至少一种C 4化合物是通过氢化选自马来酸酐，马来酸，马来酸二烷基酯和其两种或多种的混合物的C4 +氢化原料来制备的。 该方法的特征在于将粗马来酸酐物流的材料用作C4 +氢化原料或用于制备C4 +氢化原料。