Mathew R Watt

US Patent:

20130139546, Jun 6, 2013

Filed:

Dec 5, 2011

Appl. No.:

13/311038

Inventors:

Henry Edward Howard - Grand Island NY, US
Mathew R. Watt - Grand Island NY, US

International Classification:

F25J 3/04

US Classification:

62643

Abstract:

A method and apparatus to produce oxygen and nitrogen co-products in which a compressed a compressed and purified air stream is cooled, fully or partially condensed and then rectified in a main distillation column to form a nitrogen-rich vapor column overhead and crude liquid oxygen. A crude liquid oxygen stream is depressurized and then stripped in an auxiliary distillation column with a stripping gas to produce an oxygen-rich liquid. The nitrogen-rich vapor column overhead from the main distillation column is used to form a nitrogen product and the crude liquid oxygen is partially vaporized to produce the stripping gas, a residual oxygen-rich liquid and liquid nitrogen reflux to the main distillation column. The oxygen product is formed from the residual oxygen-rich liquid by either providing the heat exchange duty in condensing the compressed and purified air stream or by condensing nitrogen-rich vapor used in refluxing the main distillation column.

US Patent:

20110132032, Jun 9, 2011

Filed:

Nov 29, 2010

Appl. No.:

12/955100

Inventors:

Marco Francesco Gatti - Triuggio, MB, IT
John Fredric Billingham - Getzville NY, US
John Henri Royal - Grand Island NY, US
Dante Patrick Bonaquist - Grand Island NY, US
Mathew Roy Watt - Grand Island NY, US

International Classification:

F25J 1/02
F28D 17/00
F28D 17/02

US Classification:

62615, 165 4, 165 10

Abstract:

A method and apparatus in which air is liquefied and stored for later energy recovery during which the liquid air is pumped to high pressure, heated and then expanded to recover the energy. During the recovery of energy, the pumped liquid air is heated within a regenerator that stores the refrigeration within the liquid air. During the liquefaction of the air, part of the refrigeration required is obtained from the refrigeration stored in the regenerator.

US Patent:

20220390169, Dec 8, 2022

Filed:

Jun 8, 2022

Appl. No.:

17/835489

Inventors:

- Ball Ground GA, US
Timothy P. Gushanas - Pearland TX, US
Ravikumar Vipperla - Katy TX, US
Mathew R. Watt - Conroe TX, US

International Classification:

F25J 1/00

Abstract:

A system and method for liquefying a hydrogen gas feed stream uses a pre-cooling refrigerant for pre-cooling the feed stream, where the pre-cooling refrigerant is compressed, cooled and then separated to provide high pressure mixed refrigerant vapor and liquid streams. The high pressure vapor stream is cooled and directed to a cold vapor separator where cold separator liquid and vapor streams are formed. The cold separator vapor stream is cooled and expanded to provide a pre-cool refrigeration stream in a heat exchanger system. The high pressure pre-cooling refrigerant liquid and cold separator liquid streams are cooled and expanded and directed to the pre-cool refrigeration stream. A high pressure primary refrigerant steam, after compression and cooling, is further cooled in the heat exchanger system and then expanded using warm and cold expanders, with the resulting expanded primary refrigerant streams used to liquefy the pre-cooled hydrogen feed stream via heat exchange in the heat exchanger system.