公开(公告)号：US20190072326A1

公开(公告)日：2019-03-07

申请号：US15695381

申请日：2017-09-05

Applicant: Vijayaraghavan S. Chakravarthy ,  Hanfei Tuo ,  Maulik R. Shelat ,  James R. Dray ,  Nick J. Degenstein

Inventor： Vijayaraghavan S. Chakravarthy ,  Hanfei Tuo ,  Maulik R. Shelat ,  James R. Dray ,  Nick J. Degenstein

IPC: F25J3/04

Abstract: A system and method for recovery of rare gases such as neon, helium, xenon, and krypton in an air separation unit is provided. The rare gas recovery system comprises a non-condensable stripping column linked in a heat transfer relationship with a xenon-krypton column via an auxiliary condenser-reboiler. The non-condensable stripping column produces a rare gas containing overhead that is directed to the auxiliary condenser-reboiler where most of the neon is captured in a non-condensable vent stream that is further processed to produce a crude neon vapor stream that contains greater than about 50% mole fraction of neon with the overall neon recovery exceeding 95%. The xenon-krypton column further receives two streams of liquid oxygen from the lower pressure column and the rare gas containing overhead from the non-condensable stripping column and produces a crude xenon and krypton liquid stream and an oxygen-rich overhead.

公开(公告)号：US5114452A

公开(公告)日：1992-05-19

申请号：US544372

申请日：1990-06-27

Applicant: James R. Dray

Inventor： James R. Dray

IPC: F25J3/04

CPC classification number: F25J3/0409 ,  F25J3/04103 ,  F25J3/04206 ,  F25J3/04296 ,  F25J3/04412 ,  F25J3/04678 ,  F25J2205/02 ,  F25J2215/58 ,  F25J2250/40 ,  F25J2250/50 ,  F25J2250/58 ,  F25J2290/10 ,  Y10S62/94

Abstract: A cryogenic air separation system wherein one portion of the feed air is turboexpanded to generate refrigeration, a second portion is condensed against vaporizing product from the air separation plant, and both portions are fed into the same column to undergo separation.

公开(公告)号：US20180202690A1

公开(公告)日：2018-07-19

申请号：US15871361

申请日：2018-01-15

Applicant: Neil M. Prosser ,  James R. Dray ,  Paul W. Belanger ,  Maulik R. Shelat

Inventor： Neil M. Prosser ,  James R. Dray ,  Paul W. Belanger ,  Maulik R. Shelat

IPC: F25B9/02 ,  F25B9/10

Abstract: Closed-loop refrigeration cycles for liquid oxygen densification are disclosed. The disclosed refrigeration cycles may be turbine-based refrigeration cycles or a Joule-Thompson (JT) expansion valve based refrigeration cycles and include a refrigerant or working fluid comprising a mixture of neon or helium together with nitrogen and/or oxygen.

公开(公告)号：US5019144A

公开(公告)日：1991-05-28

申请号：US540313

申请日：1990-06-19

Applicant: Richard A. Victor ,  Michael J. Lockett ,  James R. Dray

Inventor： Richard A. Victor ,  Michael J. Lockett ,  James R. Dray

IPC: F25J3/04

CPC classification number: F25J3/04915 ,  F25J3/04303 ,  F25J3/04412 ,  F25J3/04678 ,  F25J3/04921 ,  F25J2205/02 ,  F25J2290/10 ,  Y10S62/906 ,  Y10S62/924 ,  Y10S62/939

Abstract: A cryogenic rectification system characterized by a hybrid argon column having trays in the lower portion and packing in the upper portion whereby the argon column is operated at a lower pressure thus enabling improved argon recovery while maintaining the pressure sufficiently high at the lower end of the argon column to enable fluid flow back to the main column system without need for pressurization.

Abstract translation: 一种低温精馏系统，其特征在于混合氩塔在下部具有托盘，在上部具有填料，由此使氩塔在较低的压力下运行，从而能够改善氩回收率，同时保持氩气下端的压力足够高 柱，以使流体流回到主塔系统，而不需要加压。

公开(公告)号：US11293671B2

公开(公告)日：2022-04-05

申请号：US16922067

申请日：2020-07-07

Applicant: Neil M. Prosser ,  James R. Dray ,  Paul W. Belanger ,  Maulik R. Shelat

Inventor： Neil M. Prosser ,  James R. Dray ,  Paul W. Belanger ,  Maulik R. Shelat

IPC: F25B9/02 ,  F25B9/10 ,  F25J1/00 ,  F25J1/02 ,  F25B25/00 ,  B64G1/40 ,  F25B40/00 ,  F02K9/42

Abstract: Closed-loop refrigeration cycles for liquid oxygen densification are disclosed. The disclosed refrigeration cycles may be turbine-based refrigeration cycles or a Joule-Thompson (JT) expansion valve based refrigeration cycles and include a refrigerant or working fluid comprising a mixture of neon or helium together with nitrogen and/or oxygen.

公开(公告)号：US20200333050A1

公开(公告)日：2020-10-22

申请号：US16922067

申请日：2020-07-07

Applicant: Neil M. Prosser ,  James R. Dray ,  Paul W. Belanger ,  Maulik R. Shelat

Inventor： Neil M. Prosser ,  James R. Dray ,  Paul W. Belanger ,  Maulik R. Shelat

IPC: F25B9/02 ,  F25B9/10 ,  F25J1/00 ,  F25J1/02 ,  F25B25/00 ,  B64G1/40 ,  F25B40/00

Abstract: Closed-loop refrigeration cycles for liquid oxygen densification are disclosed. The disclosed refrigeration cycles may be turbine-based refrigeration cycles or a Joule-Thompson (JT) expansion valve based refrigeration cycles and include a refrigerant or working fluid comprising a mixture of neon or helium together with nitrogen and/or oxygen.

公开(公告)号：US10295254B2

公开(公告)日：2019-05-21

申请号：US15695381

申请日：2017-09-05

Applicant: Vijayaraghavan S. Chakravarthy ,  Hanfei Tuo ,  Maulik R. Shelat ,  James R. Dray ,  Nick J. Degenstein

Inventor： Vijayaraghavan S. Chakravarthy ,  Hanfei Tuo ,  Maulik R. Shelat ,  James R. Dray ,  Nick J. Degenstein

IPC: F25J3/00 ,  F25J3/04

Abstract: A system and method for recovery of rare gases such as neon, helium, xenon, and krypton in an air separation unit is provided. The rare gas recovery system comprises a non-condensable stripping column linked in a heat transfer relationship with a xenon-krypton column via an auxiliary condenser-reboiler. The non-condensable stripping column produces a rare gas containing overhead that is directed to the auxiliary condenser-reboiler where most of the neon is captured in a non-condensable vent stream that is further processed to produce a crude neon vapor stream that contains greater than about 50% mole fraction of neon with the overall neon recovery exceeding 95%. The xenon-krypton column further receives two streams of liquid oxygen from the lower pressure column and the rare gas containing overhead from the non-condensable stripping column and produces a crude xenon and krypton liquid stream and an oxygen-rich overhead.

公开(公告)号：US5108476A

公开(公告)日：1992-04-28

申请号：US544643

申请日：1990-06-27

Applicant: James R. Dray ,  David R. Parsnick

Inventor： James R. Dray ,  David R. Parsnick

IPC: F25J3/04

CPC classification number: F25J3/042 ,  F25J3/0409 ,  F25J3/04103 ,  F25J3/04206 ,  F25J3/04296 ,  F25J3/04393 ,  F25J3/04412 ,  F25J3/04678 ,  F25J2205/04 ,  F25J2250/40 ,  F25J2250/50 ,  F25J2250/58 ,  Y10S62/924 ,  Y10S62/939

Abstract: A cryogenic air separation system comprising at least two columns wherein two portions of the feed air are turboexpanded at two different temperature levels to generate refrigeration, a third portion is condensed against vaporizing product from the air separation plant, and all three portions are fed into the same column to undergo separation.

公开(公告)号：US10808967B2

公开(公告)日：2020-10-20

申请号：US15871361

申请日：2018-01-15

Applicant: Neil M. Prosser ,  James R. Dray ,  Paul W. Belanger ,  Maulik R. Shelat

Inventor： Neil M. Prosser ,  James R. Dray ,  Paul W. Belanger ,  Maulik R. Shelat

IPC: F25B9/02 ,  F25B9/10 ,  F25J1/00 ,  F25J1/02 ,  F25B25/00 ,  B64G1/40 ,  F25B40/00 ,  F02K9/42

Abstract: Closed-loop refrigeration cycles for liquid oxygen densification are disclosed. The disclosed refrigeration cycles may be turbine-based refrigeration cycles or a Joule-Thompson (JT) expansion valve based refrigeration cycles and include a refrigerant or working fluid comprising a mixture of neon or helium together with nitrogen and/or oxygen.

公开(公告)号：US10408536B2

公开(公告)日：2019-09-10

申请号：US15695320

申请日：2017-09-05

Applicant: Maulik R. Shelat ,  Hanfei Tuo ,  Nick J. Degenstein ,  James R. Dray

Inventor： Maulik R. Shelat ,  Hanfei Tuo ,  Nick J. Degenstein ,  James R. Dray

IPC: F25J3/04 ,  F25J5/00

Abstract: A system and method for neon recovery in a double column or triple column air separation unit is provided. The neon recovery system comprises a non-condensable stripping column configured to produce a liquid nitrogen-rich liquid column bottoms and a non-condensable gas containing overhead and one or more condensing units arranged to produce a crude neon vapor stream that contains greater than about 50% mole fraction of neon with the overall neon recovery exceeding 95%. In addition, there is minimal liquid nitrogen consumption and since much of the liquid nitrogen is recycled back to the lower pressure column of the air separation unit, there is minimal impact on the recovery of other products from the air separation unit.