公开(公告)号：US20140200380A1

公开(公告)日：2014-07-17

申请号：US14154558

申请日：2014-01-14

Applicant: BASF SE

Inventor： Jan Pablo Josch ,  Philipp Grüne ,  Christian Walsdorff ,  Oliver Hammen ,  Ragavendra Prasad Balegedde Ramachandran

IPC: C07C7/05 ,  C07C5/48

CPC classification number: C07C7/05 ,  C07C5/48 ,  C07C7/08 ,  C07C7/11 ,  C07C11/167

Abstract: The invention relates to a process for preparing butadiene from n-butenes, which comprises the steps: A) provision of a feed gas stream a comprising n-butenes; B) introduction of the feed gas stream a comprising n-butenes and an oxygen-comprising gas into at least one oxidative dehydrogenation zone and oxidative dehydrogenation of n-butenes to butadiene, giving a product gas stream b comprising butadiene, unreacted n-butenes, water vapor, oxygen, low-boiling hydrocarbons, high-boiling secondary components, possibly carbon oxides and possibly inert gases; Ca) cooling of the product gas stream b by contacting with an organic solvent as coolant, Cb) compression of the product gas stream b in at least one compression stage, giving at least one aqueous condensate stream c1 and a gas stream c2 comprising butadiene, n-butenes, water vapor, oxygen, low-boiling hydrocarbons, possibly carbon oxides and possibly inert gases; D) separation of incondensable and low-boiling gas constituents comprising oxygen, low-boiling hydrocarbons, possibly carbon oxides and possibly inert gases as gas stream d2 from the gas stream c2 by absorption of the C4-hydrocarbons comprising butadiene and n-butenes in an absorption medium, giving an absorption medium stream loaded with C4 -hydrocarbons and the gas stream d2, and subsequent desorption of the C4-hydrocarbons from the loaded absorption medium stream to give a C4-product gas stream d1, E) separation of the C4 product stream d1 by extractive distillation using a solvent selective for butadiene into a stream e1 comprising butadiene and the selective solvent and a stream e2 comprising n-butenes; F) distillation of the stream f2 comprising butadiene and the selective solvent to give a stream g1 consisting essentially of the selective solvent and a stream g2 comprising butadiene.

Abstract translation: 本发明涉及从正丁烯制备丁二烯的方法，其包括以下步骤：A）提供包含正丁烯的进料气流a; B）将包含正丁烯和含氧气体的进料气流a引入至少一个氧化脱氢区和将正丁烯氧化脱氢成丁二烯，得到包含丁二烯，未反应的正丁烯， 水蒸气，氧气，低沸点烃，高沸点次级组分，可能的碳氧化物和可能的惰性气体; Ca）通过与有机溶剂作为冷却剂接触来冷却产物气流b，Cb）在至少一个压缩级中压缩产物气流b，得到至少一种含水冷凝物流c1和包含丁二烯的气流c2， 正丁烯，水蒸气，氧气，低沸点烃，可能的碳氧化物和可能的惰性气体; D）通过吸收包含丁二烯和正丁烯的C 4烃在内，从气体流c2分离包含氧，低沸点烃，可能的碳氧化物和可能的惰性气体的不可冷凝和低沸点气体成分 吸收介质，得到负载有C4-烃和气流d2的吸收介质流，随后将C4-烃从负载的吸收介质流中解吸，得到C4-产物气流d1，E）C4产物的分离 通过使用对丁二烯选择性的溶剂进行萃取蒸馏，将其流入包含丁二烯和选择性溶剂的流e1和包含正丁烯的流e2; F）蒸馏包含丁二烯和选择性溶剂的料流f2，得到基本上由选择性溶剂组成的料流g1和包含丁二烯的料流g2。

公开(公告)号：US20140200379A1

公开(公告)日：2014-07-17

申请号：US14150239

申请日：2014-01-08

Applicant: BASF SE

Inventor： Jan Pablo Josch ,  Alexander Weck ,  Sonja Giesa ,  Steffen Büteborn ,  Ragavendra Prasad Balegedde Ramachandran ,  Regina Benfer ,  Markus Weber

IPC: C07C5/48

CPC classification number: C07C5/48 ,  C07C7/08 ,  C07C7/11 ,  C07C11/167

Abstract: The invention relates to a process for preparing butadiene from n-butenes, which comprises the following steps: A) provision of a feed gas stream a comprising n-butenes; B) introduction of the feed gas stream a comprising n-butenes and an oxygen-comprising gas into at least one dehydrogenation zone and oxidative dehydrogenation of n-butenes to butadiene, giving a product gas stream b comprising butadiene, unreacted n-butenes, water vapor, oxygen, low-boiling hydrocarbons, possibly carbon oxides and possibly inert gases; C) cooling and compression of the product gas stream b in at least one compression stage, giving at least one condensate stream c1 comprising water and a gas stream c2 comprising butadiene, n-butenes, water vapor, oxygen, low-boiling hydrocarbons, possibly carbon oxides and possibly inert gases; D) separation of incondensable and low-boiling gas constituents comprising oxygen, low-boiling hydrocarbons, possibly carbon oxides and possibly inert gases as gas stream d2 from the gas stream c2 by Da) absorption of the C4-hydrocarbons comprising butadiene and n-butenes in a high-boiling absorption medium, giving an absorption medium stream loaded with C4-hydrocarbons and the gas stream d2, Db) removal of oxygen from the absorption medium stream loaded with C4-hydrocarbons by stripping with an inert gas and Dc) desorption of the C4-hydrocarbons from the loaded absorption medium stream to give a C4 product gas stream d1 which consists essentially of C4-hydrocarbons and comprises less than 100 ppm of oxygen; E) separation of the C4 product stream d1 by extractive distillation with a solvent which is selective for butadiene into a stream e1 comprising butadiene and the selective solvent and a stream e2 comprising n-butenes; F) distillation of the stream e1 comprising butadiene and the selective solvent to give a stream f1 consisting essentially of the selective solvent and a butadiene-comprising stream f2.