A process to remove reaction by-products from a selective hydrogenation effluent stream

本发明涉及自含有丁二烯和痕量重质反应副产物的选择性加氢反应区的排出物中去除重质反应副产物的方法。该方法包括将该选择性加氢反应区的排出物引入具有分馏区的丁二烯萃取蒸发器中；用丁二烯萃取区的萃余液物流回流该分馏区；自该蒸发器中移出含有丁二烯和浓度减小了的重质反应副产物的蒸发态的物料流；自该蒸发器中移出并回收含有重质反应副产物的浓缩了的液态产物物料流；和将该含有丁二烯的蒸发态物料流引入到丁二烯的苯取区中。 A process for the rejection of heavy reaction by-products from a selective hydrogenation reaction zone effluent containing butadiene and trace amounts of heavy reaction by-products by introducing the selective hydrogenation reaction zone effluent into a butadiene extraction vaporizer containing a fractionation zone, refluxing the fractionation zone with a raffinate stream from a butadiene extraction zone; removing a vaporized stream containing butadiene and having a reduced concentration of heavy reaction by-products from the vaporizer; removing and recovering a concentrated liquid product stream containing heavy reaction by-products from the vaporizer; and introducing the vaporized stream containing butadiene into the butadiene extraction zone.