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公开(公告)号：US11629108B2
公开(公告)日：2023-04-18
申请号：US16614799
申请日：2018-05-17
Applicant: TECHNIP FRANCE
Inventor： Yvon Simon , Bruno Destour , Marco Valente
Abstract: This method comprises passing a residual stream into a flash drum to form a gaseous overhead flow and liquid bottom flow, and feeding the bottom flow into a distillation column,
It comprises cooling the overhead flow in a heat exchanger to form a cooled overhead flow.
It comprises the extraction of a gaseous overhead stream at the head of the distillation column, and the formation of at least one effluent stream from the overhead stream and/or from the top stream.
The separation of the cooled overhead flow comprises passing the cooled overhead flow into an absorber, and injecting a methane-rich stream into the absorber to place the cooled overhead flow in contact with the methane-rich stream.-
公开(公告)号：US10458701B2
公开(公告)日：2019-10-29
申请号：US15030913
申请日：2014-10-23
Applicant: TECHNIP FRANCE
Inventor： Bruno Destour , Yvon Simon , Aurélia Dadou , David Chazallet
Abstract: 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.
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