公开(公告)号：US20160152531A1

公开(公告)日：2016-06-02

申请号：US14905497

申请日：2014-07-15

Applicant: BASF SE

Inventor： Christian WALSDORFF ,  Philipp GRÜNE ,  Christine SCHMITT ,  Ragavendra Prasad BALEGEDDE RAMACHANDRAN ,  Jan Pablo JOSCH

IPC: C07C5/48 ,  C07C7/11

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

Abstract: The invention relates to a process for preparing butadiene from n-butenes, comprising the steps of: A) providing an input gas stream a comprising n-butenes; B) feeding the input gas stream a comprising n-butenes and an oxygenous gas into at least one oxidative dehydrogenation zone and oxidatively dehydrogenating n-butenes to butadiene, giving a product gas stream b comprising butadiene, unconverted n-butenes, water vapor, oxygen, low-boiling hydrocarbons and high-boiling secondary components, with or without carbon oxides and with or without inert gases; Ca) cooling the product gas stream b by contacting it with a coolant and condensing at least a portion of the high-boiling secondary components; Cb) compressing the remaining product gas stream b in at least one compression stage, giving at least one aqueous condensate stream c1 and one gas stream c2 comprising butadiene, n-butenes, water vapor, oxygen and low-boiling hydrocarbons, with or without carbon oxides and with or without inert gases; Da) removing uncondensable and low-boiling gas constituents comprising oxygen and low-boiling hydrocarbons, with or without carbon oxides and with or without inert gases, as gas stream d2 from the gas stream c2 by absorbing the C4 hydrocarbons comprising butadiene and n-butenes in an absorbent, giving an absorbent stream laden with C4 hydrocarbons and the gas stream d2, and Db) subsequently desorbing the C4 hydrocarbons from the laden absorbent stream, giving a C4 product gas stream d1, which comprises additionally feeding in a methane-comprising gas stream at at least one point in the process section comprising steps B), Ca), Cb) and Da) in such amounts that the formation of an explosive gas mixture in step Da) is avoided.

Abstract translation: 本发明涉及一种从正丁烯制备丁二烯的方法，包括以下步骤：A）提供包含正丁烯的输入气流a; B）将包含正丁烯和含氧气体的输入气流a送入至少一个氧化脱氢区并将正丁烯氧化脱氢成丁二烯，得到包含丁二烯，未转化的正丁烯，水蒸汽，氧气的产物气流b 低沸点碳氢化合物和高沸点二级组分，有或没有碳氧化物和有或没有惰性气体; Ca）通过使产品气流b与冷却剂接触并冷凝至少一部分高沸点次级组分来冷却产物气流b; Cb）在至少一个压缩阶段压缩剩余的产物气流b，得到至少一种含水冷凝物流c1和一种含有或不含碳的丁二烯，正丁烯，水蒸汽，氧和低沸点烃的气流c2 氧化物和有或没有惰性气体; Da）通过吸收包含丁二烯和正丁烯的C 4烃，除去包含氧气和低沸点烃的无碳酸盐和低沸点烃，具有或不具有碳氧化物和有或无惰性气体作为气流d2来自气流c2 在吸收剂中，产生载有C 4烃的吸收剂流，气流d2和Db）随后从负载的吸收剂流中解吸C4烃，得到C4产物气流d1，其包括另外进料含甲烷气体 在包括步骤B），Ca），Cb）和Da）的过程部分中的至少一个点处的流量以使得在步骤Da）中形成爆炸性气体混合物的量被避免。

公开(公告)号：US20160152530A1

公开(公告)日：2016-06-02

申请号：US14903813

申请日：2014-07-07

Applicant: BASF SE

Inventor： Philipp GRÜNE ,  Wolfgang RÜTTINGER ,  Christine SCHMITT ,  Christian WALSDORFF

IPC: C07C5/48

CPC classification number: C07C5/48 ,  C07C2521/18 ,  C07C2523/04 ,  C07C2523/26 ,  C07C2523/28 ,  C07C2523/31 ,  C07C2523/745 ,  C07C2523/75 ,  C07C2523/887 ,  Y02P20/584 ,  C07C11/167

Abstract: The invention relates to a process for the oxidative dehydrogenation of n-butenes to butadiene, which comprises two or more production steps (i) and at least one regeneration step (ii) and in which (i) a starting gas mixture comprising n-butenes is mixed with an oxygen-comprising gas in a production step and the mixed gas is brought into contact with a multimetal oxide catalyst which comprises at least molybdenum and a further metal and is arranged in a fixed catalyst bed at a temperature of from 220 to 490° C. in a fixed-bed reactor, with a product gas mixture comprising at least butadiene, oxygen and water vapor being obtained at the outlet of the fixed-bed reactor, and (ii) the multimetal oxide catalyst is regenerated in a regeneration step by passing an oxygen-comprising regeneration gas mixture over the fixed catalyst bed at a temperature of from 200 to 450° C. and burning off the carbon deposited on the catalyst, with a regeneration step (ii) being carried out between two production steps (i), wherein the oxygen content in the product gas mixture at the outlet of the fixed-bed reactor is at least 5% by volume and the duration of a production step (i) is not more than 1000 hours.

Abstract translation: 本发明涉及一种将丁烯氧化脱氢成丁二烯的方法，其包括两个或多个制备步骤（i）和至少一个再生步骤（ii），其中（i）包含正丁烯的起始气体混合物 在制备步骤中与含氧气体混合，并使混合气体与至少包含钼和另外的金属的多金属氧化物催化剂接触，并且在220至490℃的温度下被布置在固定的催化剂床中 在固定床反应器中，在固定床反应器的出口处获得至少包含丁二烯，氧和水蒸气的产物气体混合物，和（ii）多金属氧化物催化剂在再生步骤 通过在200至450℃的温度下将含氧的再生气体混合物通过固定的催化剂床，并将沉积在催化剂上的碳烧掉，再生步骤（ii）在两个产物 步骤（i），其中固定床反应器出口处的产物气体混合物中的氧含量为至少5体积％，并且制备步骤（i）的持续时间不超过1000小时。

公开(公告)号：US20160355450A1

公开(公告)日：2016-12-08

申请号：US15033203

申请日：2014-10-27

Applicant: BASF SE

Inventor： Philipp GRÜNE ,  Oliver HAMMEN ,  Christine SCHMITT ,  Ragavendra Prasad BALEGEDDE RAMACHANDRAN ,  Jan Pablo JOSCH ,  Christian WALSDORFF

IPC: C07C5/48 ,  B01J23/00 ,  B01J23/887

CPC classification number: C07C5/48 ,  B01J23/002 ,  B01J23/8878 ,  B01J37/0045 ,  B01J2523/00 ,  C07C7/08 ,  C07C7/11 ,  C07C2523/04 ,  C07C2523/18 ,  C07C2523/26 ,  C07C2523/28 ,  C07C2523/745 ,  C07C2523/75 ,  C07C2523/887 ,  C07C11/167 ,  B01J2523/13 ,  B01J2523/54 ,  B01J2523/67 ,  B01J2523/68 ,  B01J2523/842 ,  B01J2523/845

Abstract: A process for preparing butadiene from n-butenes, comprising the steps of A) providing an input gas stream a1 comprising n-butenes; B) feeding the input gas stream a1 comprising n-butenes, an oxygenous gas and an oxygenous cycle gas stream a2 into at least one oxidative dehydrogenation zone and oxidatively dehydrogenating n-butenes to butadiene, giving a product gas stream b comprising butadiene, unconverted n-butenes, steam, oxygen, low-boiling hydrocarbons and high-boiling secondary components, with or without carbon oxides and with or without inert gases; Ca) cooling the product gas stream b and optionally at least partly removing high-boiling secondary components and steam, giving a product gas stream b′, Cb) compressing and cooling the product gas stream b′ in at least one compression and cooling stage, giving at least one aqueous condensate stream c1 and one gas stream c2 comprising butadiene, n-butenes, steam, oxygen and low-boiling hydrocarbons, with or without carbon oxides and with or without inert gases, Da) absorbing the C4 hydrocarbons comprising butadiene and n-butenes in an aromatic hydrocarbon solvent as an absorbent and removing uncondensable and low-boiling gas constituents comprising oxygen, low-boiling hydrocarbons, any carbon oxides, aromatic hydrocarbon solvent and any inert gases as gas stream d2 from the gas stream c2, giving an absorbent stream laden with C4 hydrocarbons and the gas stream d2, and then desorbing the C4 hydrocarbons from the laden absorbent stream, giving a C4 product gas stream d1, Db) at least partly recycling the gas stream d2 as cycle gas stream a2 into the oxidative dehydrogenation zone, wherein the content of aromatic hydrocarbon solvent in the cycle gas stream a2 is limited to less than 1% by volume.