公开(公告)号：US20210131728A1

公开(公告)日：2021-05-06

申请号：US17089402

申请日：2020-11-04

Applicant: TOYO ENGINEERING CORPORATION

Inventor： Keisuke SASAKURA ,  Taisei YAMAMOTO ,  Shoichi YAMAGUCHI

IPC: F25J3/02

Abstract: To provide a process for separating hydrocarbons capable of recovering ethane or propane, including improved cold heat recovery enabling a reduction in compressor power. A process for separating hydrocarbons, in which a residual gas enriched with methane or ethane and a heavy fraction enriched with a lower volatile hydrocarbon are separated, includes: a) partially condensing the feed gas by cooling using the residual gas and another refrigerant as a refrigerant, followed by vapor-liquid separation; b) depressurizing and supplying the liquid obtained from step (a) to the distillation column; c) expanding a part or all of the gas obtained from step (a) by an expander to cause partial condensation, followed by vapor-liquid separation; d) feeding the liquid obtained from step (c) to the distillation column after using it as the further refrigerant in step (a); e) feeding a part or all of the gas obtained from step (c) to the distillation column; and f) obtaining the residual gas from the top of the distillation column and the heavy fraction from the bottom of the distillation column.

公开(公告)号：US20240200869A1

公开(公告)日：2024-06-20

申请号：US18592856

申请日：2024-03-01

Applicant: TOYO ENGINEERING CORPORATION

Inventor： Keisuke SASAKURA ,  Taisei YAMAMOTO ,  Shoichi YAMAGUCHI

IPC: F25J3/02

CPC classification number: F25J3/0238 ,  F25J3/0209 ,  F25J3/0219 ,  F25J3/0242 ,  F25J3/0295 ,  F25J2200/02 ,  F25J2200/38 ,  F25J2200/70 ,  F25J2205/04 ,  F25J2210/12 ,  F25J2210/60 ,  F25J2215/62 ,  F25J2215/64 ,  F25J2240/02 ,  F25J2270/06

Abstract: To provide a process for separating hydrocarbons capable of recovering ethane or propane, including improved cold heat recovery enabling a reduction in compressor power. A process for separating hydrocarbons, in which a residual gas enriched with methane or ethane and a heavy fraction enriched with a lower volatile hydrocarbon are separated, includes: a) partially condensing the feed gas by cooling using the residual gas and another refrigerant as a refrigerant, followed by vapor-liquid separation; b) depressurizing and supplying the liquid obtained from step (a) to the distillation column; c) expanding a part or all of the gas obtained from step (a) by an expander to cause partial condensation, followed by vapor-liquid separation; d) feeding the liquid obtained from step (c) to the distillation column after using it as the further refrigerant in step (a); e) feeding a part or all of the gas obtained from step (c) to the distillation column; and f) obtaining the residual gas from the top of the distillation column and the heavy fraction from the bottom of the distillation column.

公开(公告)号：US20210063084A1

公开(公告)日：2021-03-04

申请号：US16991265

申请日：2020-08-12

Applicant: Toyo Engineering Corporation

Inventor： Taisei YAMAMOTO ,  Yasuyuki YAMAMORI

IPC: F25J3/02

Abstract: A process for obtaining a product gas and product LNG having pressure P1 close to the atmospheric pressure from lean LNG, includes: a) branching the lean LNG to obtain a first flow and a second flow; b) cooling the second flow by using a refrigerant; c) branching a liquid flow derived from the cooled second flow to obtain refrigerant LNG and remaining LNG; d) subjecting the remaining LNG to pressure reduction and gas-liquid separation to obtain a gas phase flow and a liquid phase flow (product LNG) having pressure P1; e) subjecting the refrigerant LNG to pressure reduction; f) using a flow from the step e as the refrigerant; g) joining, before or after the step f, the gas phase flow having pressure P1 to a flow from the step e; h) liquefying a flow resulting from the steps f and g by pressure increase and cooling (through heat exchange with the first flow); i) increasing the first flow in pressure before the step h; j) obtaining the product gas by regasifying the first flow after the steps h and i; and k) joining a flow liquefied in the step h to the second flow.