公开(公告)号：EP3383831A1

公开(公告)日：2018-10-10

申请号：EP16805129.0

申请日：2016-12-02

申请人： BASF SE ,  Linde AG

发明人： JOSCH, Jan Pablo ,  BALEGEDDE RAMACHANDRAN, Ragavendra Prasad ,  GRUENE, Philipp ,  RISSEL, Steffen ,  GEMBALA, Martin ,  WENNING, Ulrike ,  WELLENHOFER, Anton ,  REYNEKE, Hendrik ,  TOEGEL, Christine

IPC分类号： C07C5/48

CPC分类号： C07C5/48 ,  B01D3/40 ,  B01J19/0053 ,  B01J2219/00121 ,  B01J2219/00425 ,  C07C7/005 ,  C07C7/08 ,  C07C7/09 ,  C07C7/11 ,  C07C11/167

摘要： The method according to the invention has the steps of A) providing a feed gas flow a which contains n-butene; B) feeding the n-butene-containing feed gas flow a and an oxygen-containing gas into a dehydrogenation reactor and oxidatively dehydrogenating n-butene into butadiene; C) cooling and compressing the product gas flow b in at least one cooling stage comprising a quench column and in a compression stage comprising a compressor, wherein the product gas flow b is brought into contact with at least one coolant being circulated; D) separating non-condensable and low-boiling gas components as gas flow d2 out of the gas flow c2 by absorbing the C
4 hydrocarbons in at least one absorption agent being circulated; E) separating the C
4 product flow d1 into a material flow e1, which contains butadiene and a selective solvent, and a material flow e2, which contains n-butene, by means of an extractive distillation using the solvent which is selective for butadiene; F) distilling the material flow e1, which contains butadiene and the selective solvent, into a material flow f1, which substantially consists of the selective solvent, and a butadiene-containing material flow f2. The invention is characterized in that the following measures (i) to (iii) are taken: (i) preventing the formation of explosive gas mixtures by monitoring the oxygen concentration in the oxygen-containing gas flows fed into the dehydrogenation zone and controlling the mass flows of oxygen-containing gas flows and hydrocarbon-containing gas flows such that no explosive gas mixtures can be formed; (ii) interrupting the supply of the oxygen-containing gas mixture into the dehydrogenation zone if a threshold for the oxygen concentration in the dehydrogenation gas mixture is exceeded; and (iii) carrying out steps A) to F) in equipment which is designed to be explosion-resistant, wherein liquid-conducting pipelines are designed to be explosion-resistant, and gas lines are designed to be detonation-resistant.

公开(公告)号：EP3022169A1

公开(公告)日：2016-05-25

申请号：EP14739155.1

申请日：2014-07-15

申请人： BASF SE

发明人： WALSDORFF, Christian ,  GRUENE, Philipp ,  SCHMITT, Christine ,  BALEGEDDE RAMACHANDRAN, Ragavendra, Prasad ,  JOSCH, Jan, Pablo

IPC分类号： C07C5/48 ,  C07C11/167

CPC分类号： C07C5/48 ,  C07C7/11 ,  C07C11/167

摘要： The invention relates to a method for producing butadien from n-butenes, having the following steps: A) providing an n-butene-containing feed gas flow a; B) supplying the n-butene-containing feed gas flow a and an oxygen-containing gas to at least one oxidative dehydrogenation zone and carrying out an oxidative dehydrogenation of n-butenes into butadiene, a product gas flow b being obtained containing butadiene, non-converted n-butenes, steam, oxygen, low-boiling point hydrocarbons, high-boiling point auxiliary components, optionally carbon oxides, and optionally inert gases; Ca) cooling the product gas flow b by brining the product gas flow into contact with a coolant and condensing at least some of the high-boiling point auxiliary components; Cb) compressing the remaining product gas flow b in at least one compression stage, wherein at least one aqueous condensate flow c1 and a gas flow c2 containing butadiene, n-butenes, steam, oxygen, low-boiling point hydrocarbons, optionally carbon oxide, and optionally inert gases are obtained; Da) separating non-condensable and low-boiling point gas components comprising oxygen, low-boiling point hydrocarbons, optionally carbon oxide, and optionally inert gases as a gas flow d2 from the gas flow c2 by absorbing the C
4 hydrocarbons comprising butadiene and n-butenes in an absorption agent, an absorption agent flow loaded with C
4 hydrocarbons and the gas flow d2 being obtained, and Db) subsequently desorbing the C
4 hydrocarbons from the loaded absorption agent flow, a C
4 product gas flow d1 being obtained. The invention is characterized in that a methane-containing gas flow is additionally supplied at at least one point in the method section comprising the steps B), Ca), Cb), and Da) in such quantities that the formation of an explosive gas mixture in step Da) is prevented.

摘要翻译： 本发明涉及由正丁烯生产丁二烯的方法，其具有以下步骤：A）提供含正丁烯的原料气流a; B）将含正丁烯的原料气流a和含氧气体供入至少一个氧化脱氢区，并将正丁烯氧化脱氢成丁二烯，得到含丁二烯的产物气流b， 转化的正丁烯，蒸汽，氧气，低沸点烃，高沸点辅助组分，任选的碳氧化物和任选的惰性气体; Ca）通过使产品气流与产品气流接触而冷却产品气流b，并冷凝至少一些高沸点辅助成分; Cb）在至少一个压缩阶段压缩剩余的产物气流b，其中至少一个含水冷凝物流c1和含有丁二烯，正丁烯，蒸汽，氧，低沸点烃，任选的碳氧化物的气流c2， 并且可选地获得惰性气体; Da）通过吸收包含丁二烯的C 4烃和来自气流c 2的气流d 2将包含氧，低沸点烃，任选的碳氧化物和任选的惰性气体的不可冷凝和低沸点气体组分分离 - 丁烯在吸收剂中，负载C 4烃的吸收剂流和获得的气流d 2，以及D b）随后从负载的吸收剂流中解吸C 4烃，获得C 4产物气流d 1。 本发明的特征在于，在包括步骤B），Ca），Cb）和Da）的方法部分中的至少一个点处另外供应含甲烷的气流，使得形成爆炸性气体混合物 在步骤Da）被阻止。