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公开(公告)号：US5342509A
公开(公告)日：1994-08-30
申请号：US950622
申请日：1992-09-24
CPC分类号： C10G7/02 , C10G70/041
摘要： A process flow sequence for the reduction of polymer fouling while maintaining efficient production levels wherein a dual pressure, dual column configuration is used to effect the reduction in polymer fouling. The dual pressure, dual column configuration of the invention uses a high pressure and a separate low pressure to isolate the desired fractions while effecting a reduction in the production of fouling polymers.
摘要翻译： 用于减少聚合物结垢同时保持有效生产水平的工艺流程序列，其中使用双重压力双塔构型来实现聚合物结垢的减少。 本发明的双重压力双柱结构使用高压和单独的低压来分离所需的馏分，同时降低结垢聚合物的产生。
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公开(公告)号：US5090977A
公开(公告)日：1992-02-25
申请号：US613435
申请日：1990-11-13
CPC分类号： F25J3/0242 , C10G70/02 , C10G70/041 , F25J3/0219 , F25J3/0233 , F25J3/0238 , F25J3/0252 , F25J2210/12 , F25J2215/62 , F25J2215/64
摘要： A process sequence for treating cracked gases of heavy feedstocks which preferentially produces propylene to the exclusion of propane, butanes and butenes. The process eliminates the need for a depropanizer with the attendant savings in capital and operating costs. In lieu of a conventional C3 splitter, the process features a depropylenizer, i.e. a distillation tower designed to separate propylene from propane, butanes and butenes. A hydrogenation unit to eliminate contaminants can be placed upstream of the depropylenizer or the depropylenizer can be split into two sections with the hydrogenation unit located between the two sections.
摘要翻译： 用于处理重质原料的裂化气体的工艺顺序，其优先产生排除丙烷，丁烷和丁烯的丙烯。 该过程不需要脱丙烷酸酯，同时节省资金和运营成本。 常规C3分离器代替常规的C3分离器，该方法具有脱丙烯化装置，即设计用于从丙烷，丁烷和丁烯分离丙烯的蒸馏塔。 可以将去除污染物的氢化单元置于脱丙烯化物的上游，或者将脱丙烯化单体分成两段，氢化单元位于两段之间。
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公开(公告)号：US5443715A
公开(公告)日：1995-08-22
申请号：US037041
申请日：1993-03-25
摘要： A process for the production of gaseous olefins which involves introducing a hydrocarbon feedstock stream into a high temperature thermal cracking zone to produce a high temperature cracked product stream, quenching the cracked product stream to stop the cracking reactions, injecting at least one HDD (hydrogen donor diluent) into the cracked product stream at or downstream of the point at which the reaction is quenched, recovering normally gaseous olefins from the cracked product stream, and recovering a liquid product stream containing a diminished asphaltene content.
摘要翻译： 一种用于生产气态烯烃的方法，其包括将烃原料流引入高温热裂解区以产生高温裂化产物流，淬灭裂化产物流以停止裂解反应，注入至少一个HDD（氢供体 稀释剂）在反应猝灭点处或下游的裂化产物流中，从裂化产物流中回收正常气态的烯烃，并回收含有减少的沥青质含量的液体产物流。
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公开(公告)号：US5215649A
公开(公告)日：1993-06-01
申请号：US517994
申请日：1990-05-02
摘要： A process for the production of gaseous olefins which involves introducing a hydrocarbon feedstock stream into a high temperature thermal cracking zone to produce a high temperature cracked product stream, quenching the cracked product stream to stop the cracking reactions, injecting at least one HDD (hydrogen donor diluent) into the cracked product stream at or downstream of the point at which the reaction is quenched, recovering normally gaseous olefins from the cracked product stream, and recovering a liquid product stream containing a diminished asphaltene content.
摘要翻译： 一种用于生产气态烯烃的方法，其包括将烃原料流引入高温热裂解区以产生高温裂化产物流，淬灭裂化产物流以停止裂解反应，注入至少一个HDD（氢供体 稀释剂）在反应猝灭点处或下游的裂化产物流中，从裂化产物流中回收正常气态的烯烃，并回收含有减少的沥青质含量的液体产物流。
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5.发明授权Process for recovering olefins from cat-cracked gas without accumulating undesirable oxides of nitrogen 失效从催化裂化气体回收烯烃的方法，而不会积聚不需要的氮氧化物
公开(公告)号：US5444176A
公开(公告)日：1995-08-22
申请号：US967835
申请日：1992-10-28
IPC分类号： C07C7/11 , B01D53/14 , B01D53/54 , C07C11/02 , C10G55/06 , C10G70/04 , C10G70/06 , F25J3/02 , C07C7/00 , F25J3/00
CPC分类号： C10G70/041 , C10G70/06 , F25J3/0209 , F25J3/0219 , F25J3/0233 , F25J3/0238 , F25J3/0242 , F25J3/0247 , F25J3/0252 , F25J2205/50 , F25J2210/12 , F25J2215/62 , F25J2215/64 , F25J2220/02
摘要： A safe, effective, and economical method is provided for recovering olefins from cat-cracked gases without accumulating dangerous amounts of nitrogen oxides. A stream of cat-cracked gas first is scrubbed to remove acid gases, including nitrogen dioxide (NO.sub.2), and then is passed through a depropanizer fractionation tower. Hydrocarbons having four or more carbon atoms are recovered in the bottoms of the depropanizer, and the overhead from the depropanizer--which is composed of hydrocarbons having three or fewer carbon atoms--is sent to an absorber demethanizer tower. Hydrocarbons having two or more carbon atoms are recovered in the bottoms from the absorber demethanizer tower, where temperatures are no lower than about -45.56.degree. C. (-50.degree. F.). The overhead from the absorber demethanizer tower--which is composed of methane, hydrogen, and trace amounts of nitrogen oxide, C.sub.2, and absorbent (C.sub.3)--then is chilled to condense and recover trace amounts of C.sub.2 and heavier gases, including trace amounts of the C.sub.3 absorbent, at temperatures of about -101.11.degree. C. (-150.degree. F.) or higher. Thus, recovery of desired hydrocarbons from the cat-cracked gas is conducted at temperatures that are high enough to prevent the oxidation of nitric oxide (NO) to form nitrogen dioxide (NO.sub.2) and high enough to prevent the accumulation of unwanted nitrogen oxides.
摘要翻译： 提供了一种安全，有效和经济的方法来回收来自猫裂纹气体的烯烃，而不会累积危险的氮氧化物。 首先将一批猫裂纹气体洗涤以除去包括二氧化氮（NO2）在内的酸性气体，然后通过脱丙烷塔分馏塔。 具有四个或更多碳原子的碳氢化合物被回收到脱丙烷塔的底部，并且由脱丙烷化器（其由具有三个或更少碳原子的烃组成）的塔顶馏出物被送到吸收器脱甲烷塔。 具有两个或多个碳原子的烃在来自吸收器脱甲烷塔的塔底中回收，其中温度不低于约-45.56℃（-50°F）。 由甲烷，氢气和痕量的氮氧化物C2和吸收剂（C3）组成的吸收剂脱甲烷塔的塔顶馏出物冷凝并回收痕量的C2和较重的气体，包括痕量的 C3吸收剂，在约-101.11℃（-150°F）或更高的温度下。 因此，从破裂气体回收所需的烃是在足够高的温度下进行的，以防止一氧化氮（NO）氧化形成二氧化氮（NO 2），并且足够高以防止不想要的氮氧化物的积聚。
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