公开(公告)号：US5329774A

公开(公告)日：1994-07-19

申请号：US958170

申请日：1992-10-08

申请人： Dennis C. Tanguay ,  Gerard E. Dupuis ,  Bao Ha

发明人： Dennis C. Tanguay ,  Gerard E. Dupuis ,  Bao Ha

IPC分类号： C07C7/09 ,  F25J3/06

CPC分类号： F25J3/0655 ,  C07C7/09 ,  F25J3/062 ,  F25J3/065 ,  F25J2210/12 ,  F25J2270/12 ,  F25J2270/18 ,  F25J2270/66

摘要： A method of and apparatus for separating C.sub.4 hydrocarbons from a feed comprising a gaseous mixture. The feed is cooled and partially condensed in a plurality of successive stages of condensation and phase separation. A gaseous overhead from each separation stage is further cooled and supplied to the next separation stage and the liquid separated from each stage is used to cool the gas. Further refrigeration is supplied to the gas to effect the condensations by indirect heat exchange with a closed cycle refrigerant subjected to a compression/expansion cycle. The feed undergoes no compression and no abrupt expansion during the separation, so that the feed undergoes a pressure decrease due only to friction of the passage of the feed through the apparatus. The pressure loss is no more than about 20 psi. The temperature of the feed is maintained below 150.degree. F. at all times, to prevent polymerization of 1,3-butadiene. A mixed refrigerant passes through the closed refrigeration cycle and contains, in decreasing order of plentitude, propane, ethylene, isopentane and nitrogen. The mixed refrigerant is subjected to a single compression followed by cooling and phase separation. The phases of the mixed refrigerant thus separated are separately cooled and expanded and the material thus produced by expansion is used to cool the feed.

摘要翻译： 从包含气体混合物的进料中分离C4烃的方法和装置。 进料冷却并在多个连续阶段的冷凝和相分离中部分冷凝。 来自每个分离阶段的气体塔顶馏出物被进一步冷却并供应到下一个分离阶段，并且使用从每个阶段分离的液体来冷却气体。 通过与经受压缩/膨胀循环的封闭循环制冷剂进行间接热交换，向气体供给进一步的制冷以实现冷凝。 进料在分离期间不经受压缩而没有突然膨胀，使得进料仅由于进料通过装置的通道的摩擦而经历压力降低。 压力损失不超过约20 psi。 进料的温度始终保持在150°F以下，以防止1,3-丁二烯的聚合。 混合的制冷剂通过封闭的制冷循环，并以含量的顺序含有丙烷，乙烯，异戊烷和氮气。 混合的制冷剂经受单次压缩，然后进行冷却和相分离。 这样分离的混合制冷剂的相分别冷却和膨胀，并且通过膨胀产生的材料用于冷却进料。