摘要:
A C4-olefin mixture having a 1,3-butadiene content of from 100 to 500 ppm and a content of 1,2-dienes of less than 10 ppm is described. The present invention further provides a process for preparing this C4-olefin mixture and provides for its use in a metathesis reaction for preparing 2-pentene and/or 3-hexene.
摘要:
A C4-olefin mixture having a 1,3-butadiene content of from 100 to 500 ppm and a content of 1,2-dienes of less than 10 ppm is described. The present invention further provides a process for preparing this C4-olefin mixture and provides for its use in a metathesis reaction for preparing 2-pentene and/or 3-hexene.
摘要:
A C4-olefin mixture having a 1,3-butadiene content of from 100 to 500 ppm and a content of 1,2-dienes of less than 10 ppm is described. The present invention further provides a process for preparing this C4-olefin mixture and provides for its use in a metathesis reaction for preparing 2-pentene and/or 3-hexene.
摘要:
A C4-olefin mixture having a 1,3-butadiene content of from 100 to 500 ppm and a content of 1,2-dienes of less than 10 ppm is described. The present invention further provides a process for preparing this C4-olefin mixture and provides for its use in a metathesis reaction for preparing 2-pentene and/or 3-hexene.
摘要:
A process for preparing 1-butene from 1-butane, which includes providing a n-butane-containing feed gas stream; introducing of the n-butane-containing feed gas stream into at least one dehydrogenation zone and nonoxidative catalytic dehydrogenation of n-butane; removing hydrogen, the low-boiling secondary constituents and optionally water vapor to give a C4 product gas stream containing 10-80% by volume of n-butane, 5-40% by volume of 1-butene, 10-50% by volume of 2-butene, 0-40% by volume of butadiene and 0-10% by volume of further gas constituents; introducing the C4 product gas stream containing 10-80% by volume of n-butane, 10-60% by volume of 1-butene, 15-60% by volume of 2-butene, 0-5% by volume of butadiene and 0-10% by volume of further gas constituents, into a selective hydrogenation zone and selective hydrogenation of butadiene to 1- and/or 2-butene to give stream consisting essentially of n-butane, 1-butene and 2-butene; and separating of the stream distillation into a desired product.
摘要:
A) Provision of an n-butane-containing feed gas stream a; B) introduction of the n-butane-containing feed gas stream a into at least one dehydrogenation zone and nonoxidative catalytic dehydrogenation of n-butane to give a product gas stream b comprising n-butane, 1-butene, 2-butene, butadiene, hydrogen, low-boiling secondary constituents and possibly water vapor; C) removal of hydrogen, the low-boiling secondary constituents and, if appropriate, water vapor to give a C4 product gas stream c consisting essentially of n-butane, 1-butene, 2-butene and butadiene; D) separation of the C4 product gas stream c into a recycle stream d1 consisting essentially of n-butane and a stream d2 comprising 1-butene, 2-butene and butadiene by extractive distillation and recirculation of the recycle stream d1 consisting essentially of n-butane to the dehydrogenation zone; E) introduction of the stream d2 comprising 1-butene, 2-butene and butadiene into a selective hydrogenation zone and selective hydrogenation of butadiene to 1-butene and/or 2-butene to give a stream e comprising 1-butene and 2-butene; F) introduction of the stream e comprising 1-butene and 2-butene and a circulating stream g comprising 1-butene and 2-butene into a distillation zone and isolation of a desired product stream f1 consisting essentially of 1-butene to leave a 2-butene-containing stream f2; G) introduction of the 2-butene-containing stream f2, if appropriate after a purge gas stream has been separated off, into an isomerization zone and isomerization of 2-butene to 1-butene so as to give a circulating stream g comprising 1-butene and 2-butene and recirculation, if appropriate after a purge gas stream has been separated off from the circulating gas stream g, of the circulating gas stream g to the distillation zone.
摘要翻译:A)提供含正丁烷的进料气流a; B)将含正丁烷的原料气流a引入至少一个脱氢区和正丁烷的非氧化催化脱氢,得到包含正丁烷,1-丁烯,2-丁烯,丁二烯, 氢,低沸点二级成分和可能的水蒸气; C)除去氢气,低沸点二级成分,如果合适的话,除去水蒸气,得到基本上由正丁烷,1-丁烯,2-丁烯组成的C 4 H 4产物气流c, 丁二烯 D)将C 4 H 4产物气流c分离成基本上由正丁烷组成的再循环料流d1和包含1-丁烯,2-丁烯和丁二烯的料流d2,通过萃取蒸馏和再循环 基本上由正丁烷组成的再循环流d1到脱氢区; E)将包含1-丁烯,2-丁烯和丁二烯的料流d2引入选择性氢化区并将丁二烯选择性氢化为1-丁烯和/或2-丁烯,得到包含1-丁烯和2-丁烯的料流e ; F)将包含1-丁烯和2-丁烯的流e和包含1-丁烯和2-丁烯的循环流g引入蒸馏区并分离基本上由1-丁烯组成的所需产物流f1以留下2 含丁烯的流f2; G)引入含有2-丁烯的料流f2,如果在吹扫气体流已经分离出之后适当,将其引入异构化区域并将2-丁烯异构化成1-丁烯,从而得到包含1-丁烯的循环流g, 丁烯和2-丁烯,并且如果适当,在将循环气流g从循环气流g分离出吹扫气流之后再循环到蒸馏区。
摘要:
A) Provision of an n-butane-containing feed gas stream a; B) introduction of the n-butane-containing feed gas stream a into at least one dehydrogenation zone and nonoxidative catalytic dehydrogenation of n-butane to give a product gas stream b comprising n-butane, 1-butene, 2-butene, butadiene, low-boiling secondary constituents, hydrogen and possibly water vapor, C) removal of hydrogen, the low-boiling secondary constituents and, if appropriate, water vapor to give a C4 product gas stream c consisting essentially of n-butane, 1-butene, 2-butene and butadiene; D) introduction of the C4 product gas stream c consisting essentially of n-butane, 1-butene, 2-butene and butadiene into a selective hydrogenation zone and selective hydrogenation of butadiene to 1- and/or 2-butene to give a stream d consisting essentially of n-butane, 1-butene and 2-butene; E) separation of the stream d into a desired product stream e1 consisting essentially of 1-butene and a recycle stream e2 consisting essentially of 2-butene and n-butane and recirculation of the recycle stream e2 consisting essentially of 2-butene and n-butane to the dehydrogenation zone.
摘要翻译:A)提供含正丁烷的进料气流a; B)将含正丁烷的原料气流a引入至少一个脱氢区和正丁烷的非氧化催化脱氢,得到包含正丁烷,1-丁烯,2-丁烯,丁二烯, 低沸点二次成分,氢气和可能的水蒸汽,C)除去氢气,低沸点次级组分,如果合适的话,除去水蒸汽,得到基本上由以下组成的C 4 H 3产物气流c 正丁烷,1-丁烯,2-丁烯和丁二烯; D)将基本上由正丁烷,1-丁烯,2-丁烯和丁二烯组成的C 4 H 4产物气流c引入选择性氢化区,并将丁二烯选择性氢化成1-和/或 得到基本上由正丁烷,1-丁烯和2-丁烯组成的料流d; E)将流d分离成基本上由1-丁烯组成的所需产物流e1和基本上由2-丁烯和正丁烷组成的再循环流e2,再循环流体e2基本上由2-丁烯和正丁烯组成, 丁烷到脱氢区。
摘要:
The disclosure relates to a process for preparing butadiene. The process involves nonoxidatively catalytically dehydrogenating butane to obtain a product gas stream containing butane, 1-butene, 2-butene, butadiene, hydrogen and secondary constituents. The 1-butene and 2-butene of the product gas stream is then oxidatively dehydrogenated to give a second gas stream containing butane,2-butene, butadiene, hydrogen, steam and secondary constituents. Next, the butane,2-butene and butadiene are separated from the second gas stream and the butane and 2-butene are then separated from the butadiene product. The butane and 2-butene are then recycled into the nonoxidative catalytic dehydrogenating zone.
摘要:
A process for preparing 1-butene, which includes nonoxidatively, catalytically dehydrogenating n-butane to obtain a product gas stream of n-butane, 1-butene, 2-butene, butadiene, hydrogen, and secondary constituents; removing hydrogen and the secondary constituents to obtain a C4 product gas stream; separating the C4 product stream into a recycle stream of n-butane and a stream of 1-butene, 2-butene and butadiene by extractive distillation, and recirculating the recycle stream to the dehydrogenation zone; introducing the 1 -butene, 2-butene and butadiene stream into a selective hydrogenation zone and selective hydrogenation of butadiene to 1-butene and/or 2-butene to obtain a stream of 1-butene and 2-butene; introducing the 1-butene and 2-butene stream, and a circulating stream of 1-butene and 2-butene into a distillation zone and isolation of a product stream; and introducing the 2-butene-containing stream into an isomerization zone to obtain a circulating stream of 1-butene and 2-butene, and recirculating the circulating stream to the distillation zone.
摘要:
The invention relates to a process for preparing butadiene from n-butane having the steps of A) providing a feed gas stream a comprising n-butane; B) feeding the feed gas stream a comprising n-butane into at least one first dehydrogenation zone and nonoxidatively catalytically dehydrogenating n-butane to obtain a product gas stream b comprising n-butane, 1-butene, 2-butene, butadiene, hydrogen, low-boiling secondary constituents and in some cases steam; C) feeding the product gas stream b of the nonoxidative catalytic dehydrogenation and an oxygenous gas into at least one second dehydrogenation zone and oxidatively dehydrogenating 1-butene and 2-butene to obtain a product gas stream c comprising n-butane, 2-butene, butadiene, hydrogen, low-boiling secondary constituents and steam, said product gas stream c having a higher content of butadiene than the product gas stream b; D) removing hydrogen, the low-boiling secondary constituents and steam to obtain a C4 product gas stream d substantially consisting of n-butane, 2-butene and butadiene; E) separating the C4 product gas stream d into a recycle stream e1 consisting substantially of n-butane and 2-butene and a stream e2 consisting substantially of butadiene by extractively distilling and recycling the stream e1 into the first dehydrogenation zone; F) if desired, feeding some or all of the stream e2 consisting substantially of butadiene into a selective hydrogenation zone and selectively hydrogenating butadiene to 1- and/or 2-butene to obtain a stream f comprising 1-butene and 2-butene; G) if desired, feeding the stream f comprising 1-butene and 2-butene into a distillation zone and removing a product of value stream g1 consisting substantially of 1-butene to leave a stream g2 comprising 2-butene; H) if desired, recycling the stream g2 comprising 2-butene into the first dehydrogenation zone.
摘要翻译:本发明涉及一种从正丁烷制备丁二烯的方法,该方法具有以下步骤:A)提供包含正丁烷的进料气流a; B)将包含正丁烷的进料气流(a)进料到至少一个第一脱氢区和非氧化催化脱氢的正丁烷中,以获得包含正丁烷,1-丁烯,2-丁烯,丁二烯,氢, 低沸点次生成分,有时还有蒸汽; C)将非氧化催化脱氢的产物气流b和氧气输送到至少一个第二脱氢区,并使1-丁烯和2-丁烯氧化脱氢得到包含正丁烷,2-丁烯, 丁二烯,氢,低沸点二次成分和蒸汽,所述产物气流c具有比产物气流b更高含量的丁二烯; D)除去氢气,低沸点次级组分和蒸汽,得到基本上由正丁烷,2-丁烯和丁二烯组成的C 4 H 4产物气流d; E)将C 4 H 4产物气流d分离成基本上由正丁烷和2-丁烯组成的循环流e1和基本上由丁二烯组成的物流e2,通过萃取蒸馏并将流e1再循环到 第一个脱氢区; F)如果需要,将基本上由丁二烯组成的一些或全部流e2加入到选择性氢化区中,并将丁二烯选择性氢化为1-和/或2-丁烯,以获得包含1-丁烯和2-丁烯的料流f; 如果需要,将包含1-丁烯和2-丁烯的料流f加入到蒸馏区中并除去基本上由1-丁烯组成的物流g1的产物以留下包含2-丁烯的料流g2; H)如果需要,将包含2-丁烯的料流g2再循环到第一脱氢区中。