Distillation sequence for the purification and recovery of hydrocarbons
    4.
    发明授权
    Distillation sequence for the purification and recovery of hydrocarbons 有权
    纯化和回收烃的蒸馏顺序

    公开(公告)号:US07311813B2

    公开(公告)日:2007-12-25

    申请号:US10393460

    申请日:2003-03-20

    IPC分类号: B01D3/02 B01D3/06 B01D3/14

    摘要: This invention is an improved distillation sequence for the separation and purification of ethylene from a cracked gas. A hydrocarbon feed enters a C2 distributor column. The top of the C2 distributor column is thermally coupled to an ethylene distributor column, and the bottoms liquid of a C2 distributor column feeds a deethanizer column. The C2 distributor column utilizes a conventional reboiler. The top of the ethylene distributor is thermally coupled with a demethanizer column, and the bottoms liquid of the ethylene distributor feeds a C2 splitter column. The ethylene distributor column utilizes a conventional reboiler. The deethanizer and C2 splitter columns are also thermally coupled and operated at a substantially lower pressure than the C2 distributor column, the ethylene distributor column, and the demethanizer column. Alternatively, a hydrocarbon feed enters a deethanizer column. The top of the deethanizer is thermally coupled to an ethylene distributor column, and the ethylene distributor column utilizes a conventional reboiler. The top of the ethylene distributor column is thermally coupled with a demethanizer column, and the bottoms liquid of the ethylene distributor column feeds a C2 splitter column. The C2 splitter column operates at a pressure substantially lower than the ethylene distributor column, the demethanizer column, and the deethanizer column.

    摘要翻译: 本发明是用于从裂化气体中分离和纯化乙烯的改进的蒸馏顺序。 烃进料进入C2分配塔。 C2分配器柱的顶部热耦合到乙烯分配器柱,并且C2分配器塔的底部液体供给脱乙烷塔。 C2分配器柱使用常规的再沸器。 乙烯分配器的顶部与脱甲烷塔热耦合,并且乙烯分配器的底部液体供给C2分离塔。 乙烯分配塔利用常规的再沸器。 脱乙烷塔和C2分离塔也可以以比C2分配塔,乙烯分配塔和脱甲烷塔更低的压力热耦合和操作。 或者,烃进料进入脱乙烷塔。 脱乙烷塔的顶部与乙烯分配塔热偶合,乙烯分配塔利用常规的再沸器。 乙烯分配塔的顶部与脱甲烷塔热耦合,并且乙烯分配器塔的底部液体供应C2分离塔。 C2分离塔在基本上低于乙烯分配塔,脱甲烷塔和脱乙烷塔的压力下运行。