Pallav Jain

US Patent:

6453698, Sep 24, 2002

Filed:

Apr 12, 2001

Appl. No.:

09/833892

Inventors:

Pallav Jain - Houston TX
Jame Yao - Sugar Land TX
Jong Juh Chen - Sugar Land TX
Douglas G. Elliot - Houston TX

Assignee:

IPSI LLC - Houston TX

International Classification:

F25J 302

US Classification:

62621, 62643

Abstract:

A process for enhancing the recovery of less volatile components, from a multi component gas mixture, in a cryogenic distillation column, which involves withdrawing a stream from the cryogenic distillation column and processing it to yield a stream leaner in the component to be recovered, which will be cooled and fed to the cryogenic distillation column as a reflux. The processing step may include heating or cooling the side draw and then further contacting the side draw with another stream which is substantially condensed.

US Patent:

6457315, Oct 1, 2002

Filed:

Dec 7, 2001

Appl. No.:

10/020085

Inventors:

Jong Juh Chen - Sugar Land TX
Jame Yao - Sugar Land TX
Douglas G. Elliot - Houston TX
Pallav Jain - Durham NC

Assignee:

IPSI, LLC - Houston TX

International Classification:

F02C 100

US Classification:

60772, 60728, 62333

Abstract:

A method and apparatus for enhancing the power output and operational efficiency of a combustion turbine system using a combined refrigerant substantially comprising a first refrigerant and a second refrigerant, whereby the combined refrigerant exhibits a total pressure substantially greater than each respective first and second refrigerant at a temperature inside an evaporative chiller. In a preferred embodiment, the combined refrigerant cools turbine inlet air through the exchange of heat from the inlet air, in an air chiller, with a coolant which is cooled by the combined refrigerant in the evaporative chiller. The combined refrigerant, after it is used to cool the coolant in the evaporative chiller, is separated through the use of a liquid absorbent which absorbs the second refrigerant to form a solution pair. The non-absorbed first refrigerant is compressed, condensed and then recirculated to eventually join the second refrigerant which is desorbed from the solution pair in a regenerator. The economic advantage of the present invention is enhanced by thermally linking the heat required to regenerate the second absorptive refrigerant from the solution pair with the hot exhaust of heat available from the gas turbine.

US Patent:

6354105, Mar 12, 2002

Filed:

Jun 16, 2000

Appl. No.:

09/596398

Inventors:

Pallav Jain - Houston TX
Jame Yao - Sugar Land TX
Jong Juh Chen - Sugar Land TX
Douglas G. Elliot - Houston TX

Assignee:

IPSI L.L.C. - Houston TX

International Classification:

F25J 300

US Classification:

62619, 62647

Abstract:

A process for enhancing recovery of ethylene, ethane and heavier components using a cryogenic distillation column which involves dividing the feed gas into a first gaseous stream and a main gaseous stream. The first gaseous stream is compressed and cooled, and then expanded and introduced into the cryogenic distillation column as main reflux stream, or is further processed to generate at least one reflux stream to the cryogenic distillation column.