公开(公告)号：WO2009045832A2

公开(公告)日：2009-04-09

申请号：PCT/US2008/077627

申请日：2008-09-25

Applicant: PRAXAIR TECHNOLOGY, INC. ,  DRAGOMIR, Ramona, Manuela ,  SHAH, Minish, Mahendra ,  HOWARD, Henry, Edward

Inventor： DRAGOMIR, Ramona, Manuela ,  SHAH, Minish, Mahendra ,  HOWARD, Henry, Edward

IPC: F25J1/02

CPC classification number: F25J1/0022 ,  F25J1/0037 ,  F25J1/004 ,  F25J1/0045 ,  F25J1/0202 ,  F25J1/0232 ,  F25J1/0264 ,  F25J1/0267 ,  F25J1/0288 ,  F25J2205/66 ,  F25J2210/06 ,  F25J2220/62 ,  F25J2220/64 ,  F25J2240/40 ,  F25J2270/06

Abstract: A method for liquefying natural gas using the pressure energy of the natural gas, wherein flash vapor from natural gas depressurization is employed in a refrigeration cycle for subcooling high pressure natural gas prior to flashing.

Abstract translation: 使用天然气的压力来液化天然气的方法，其中使用天然气减压的闪蒸蒸汽在用于在闪蒸之前过冷高压天然气的制冷循环中。

公开(公告)号：WO2009045832A3

公开(公告)日：2014-05-01

申请号：PCT/US2008077627

申请日：2008-09-25

Applicant: PRAXAIR TECHNOLOGY INC ,  DRAGOMIR RAMONA MANUELA ,  SHAH MINISH MAHENDRA ,  HOWARD HENRY EDWARD

Inventor： DRAGOMIR RAMONA MANUELA ,  SHAH MINISH MAHENDRA ,  HOWARD HENRY EDWARD

IPC: F25J1/00

CPC classification number: F25J1/0022 ,  F25J1/0037 ,  F25J1/004 ,  F25J1/0045 ,  F25J1/0202 ,  F25J1/0232 ,  F25J1/0264 ,  F25J1/0267 ,  F25J1/0288 ,  F25J2205/66 ,  F25J2210/06 ,  F25J2220/62 ,  F25J2220/64 ,  F25J2240/40 ,  F25J2270/06

Abstract: A method for liquefying natural gas using the pressure energy of the natural gas, wherein flash vapor from natural gas depressurization is employed in a refrigeration cycle for subcooling high pressure natural gas prior to flashing.

Abstract translation: 使用天然气的压力来液化天然气的方法，其中使用天然气减压的闪蒸蒸汽在用于在闪蒸之前过冷高压天然气的制冷循环中。

公开(公告)号：WO2008070714A3

公开(公告)日：2008-06-12

申请号：PCT/US2007/086488

申请日：2007-12-05

Applicant: PRAXAIR TECHNOLOGY, INC. ,  DRAGOMIR, Ramona, Manuela ,  DRNEVICH, Raymond, Francis ,  BONAQUIST, Dante, P.

Inventor： DRAGOMIR, Ramona, Manuela ,  DRNEVICH, Raymond, Francis ,  BONAQUIST, Dante, P.

IPC: B01D53/047 ,  C01B3/50 ,  F25J3/00

Abstract: A process and system for recovering valuable by-products (e.g., hydrogen) from refinery gas streams. For hydrogen-only recovery, the invention comprises a partial condensation step to upgrade the refinery fuel gas to a minimum of 60% hydrogen, which is further purified in a pressure swing adsorption process. When configured to recover hydrogen, methane-rich gas and raw LPG (methane depleted gas containing C2 hydrocarbons and heavier), the invention comprises two partial condensation steps where the feed is cooled in the first step to allow separation of ethane and heavier hydrocarbons, and the resulting vapor is cooled to a lower temperature in a second step for hydrogen recovery.

公开(公告)号：WO2008070714A2

公开(公告)日：2008-06-12

申请号：PCT/US2007086488

申请日：2007-12-05

Applicant: PRAXAIR TECHNOLOGY INC ,  DRAGOMIR RAMONA MANUELA ,  DRNEVICH RAYMOND FRANCIS ,  BONAQUIST DANTE P

Inventor： DRAGOMIR RAMONA MANUELA ,  DRNEVICH RAYMOND FRANCIS ,  BONAQUIST DANTE P

IPC: B01D53/047 ,  C01B3/50

CPC classification number: F25J3/0655 ,  B01D53/047 ,  B01D2256/16 ,  B01D2259/416 ,  C01B3/506 ,  C01B3/56 ,  C01B2203/0465 ,  C01B2203/0475 ,  C01B2203/048 ,  C01B2203/0485 ,  C01B2203/0495 ,  F25J3/0219 ,  F25J3/0233 ,  F25J3/0238 ,  F25J3/0252 ,  F25J3/062 ,  F25J3/0635 ,  F25J2200/70 ,  F25J2205/04 ,  F25J2205/40 ,  F25J2205/80 ,  F25J2210/02 ,  F25J2210/12 ,  F25J2245/02

Abstract: A process and system for recovering valuable by-products (e.g., hydrogen) from refinery gas streams. For hydrogen-only recovery, the invention comprises a partial condensation step to upgrade the refinery fuel gas to a minimum of 60% hydrogen, which is further purified in a pressure swing adsorption process. When configured to recover hydrogen, methane-rich gas and raw LPG (methane depleted gas containing C2 hydrocarbons and heavier), the invention comprises two partial condensation steps where the feed is cooled in the first step to allow separation of ethane and heavier hydrocarbons, and the resulting vapor is cooled to a lower temperature in a second step for hydrogen recovery.

Abstract translation: 用于从炼油厂气流回收有价值的副产物（例如氢气）的方法和系统。 对于仅氢回收，本发明包括部分冷凝步骤，以将炼油厂燃料气体升级至至少60％的氢气，其在变压吸附过程中进一步纯化。 当配置回收氢气，富含甲烷的气体和原始LPG（含有C2烃和较重的甲烷贫化气体）时，本发明包括两个部分冷凝步骤，其中进料在第一步骤中冷却以允许乙烷和较重的烃分离，以及 在第二步骤中将所得蒸汽冷却至较低温度以进行氢气回收。