专利检索 ap:("TECHNIP FRANCE") AND inv:"Aurélia Dadou" 第 1 页

$Method for fractionating a stream of cracked gas, using an intermediate recirculation current, and related plant$

1.

发明授权
Method for fractionating a stream of cracked gas, using an intermediate recirculation current, and related plant 有权

公开(公告)号：US10458701B2

公开(公告)日：2019-10-29

申请号：US15030913

申请日：2014-10-23

申请人： TECHNIP FRANCE

发明人： Bruno Destour , Yvon Simon , Aurélia Dadou , David Chazallet

IPC分类号： F25J3/02 , C10L3/00 , C10G70/04 , C07C7/09 , C07C7/00 , C10G5/06 , C10G9/00 , C07C5/327

摘要： This method comprises: forming an expanded intermediate recirculation stream (170) from a liquid (112, 128) obtained during an upstream cooling and/or intermediate cooling step, upstream from the downstream cooling step; circulating the intermediate recirculation stream (170) at least in an upstream heat exchanger (42) to cool an upstream stream of cracked gas (102); reintroducing the reheated intermediate recirculation stream (170) in a raw cracked gas (20) upstream from at least one compressor (36, 38) of a cooling and compression stage (24). The upstream, intermediate and downstream cooling steps is carried out without a heat exchanger respectively of an upstream stream of cracked gas (102), an intermediate stream of cracked gas (114) and a downstream stream of cracked gas (140) with an external refrigeration cycle.