Title of Invention	"A PROCESS FOR PRODOCING AN AROMATIC DICARBOXYLIC ACID"
Abstract	The invention provides improved energy content in and shaft power recovery from off-gas from xylene oxidation reactions while at the same time minimizing wastewater treatment cost. More shaft power is produced using off-gas than is required to drive the main air compressor, even with preferred, relatively low oxidation temperatures. Simultaneously, an amount of wastewater greater than byproduct water from oxidation of xylene is kept in vapor form and treated along with off-gas pollutants in a self-sustaining (self-fueling) gas-phase thermal oxidative destruction unit. Optionally, off-gas is combined from multiple xylene oxidation reactors, comprising primary and/or secondary oxidation reactors and forming TPA and/or IPA. Optionally, air compressor condensate and caustic scrubber blowdown are used in a TPA process or as utility water, effectively eliminating normal flow of liquid wastewater effluent from a TPA plant. Optionally, PET off-gas containing the water of PET formation is treated in a shared thermal oxidative destruction unit, effectively eliminating normal flow of liquid wastewater effluent from a combined pX-to-TPA-to-PET plant.

Title of Invention

"A PROCESS FOR PRODOCING AN AROMATIC DICARBOXYLIC ACID"

Abstract

The invention provides improved energy content in and shaft power recovery from off-gas from xylene oxidation reactions while at the same time minimizing wastewater treatment cost. More shaft power is produced using off-gas than is required to drive the main air compressor, even with preferred, relatively low oxidation temperatures. Simultaneously, an amount of wastewater greater than byproduct water from oxidation of xylene is kept in vapor form and treated along with off-gas pollutants in a self-sustaining (self-fueling) gas-phase thermal oxidative destruction unit. Optionally, off-gas is combined from multiple xylene oxidation reactors, comprising primary and/or secondary oxidation reactors and forming TPA and/or IPA. Optionally, air compressor condensate and caustic scrubber blowdown are used in a TPA process or as utility water, effectively eliminating normal flow of liquid wastewater effluent from a TPA plant. Optionally, PET off-gas containing the water of PET formation is treated in a shared thermal oxidative destruction unit, effectively eliminating normal flow of liquid wastewater effluent from a combined pX-to-TPA-to-PET plant.

Full Text

Documents:

http://ipindiaonline.gov.in/patentsearch/GrantedSearch/viewdoc.aspx?id=Lvr+UnYcPpU93PIiBFkn9g==&loc=+mN2fYxnTC4l0fUd8W4CAA==

« Previous Patent

Next Patent »

Patent Number

270786

Indian Patent Application Number

3109/DELNP/2011

PG Journal Number

04/2016

Publication Date

22-Jan-2016

Grant Date

19-Jan-2016

Date of Filing

28-Apr-2011

Name of Patentee

GRUPO PETROTEMEX, S.A. DE C.V.

Applicant Address

RICARDO MARGAIN NO. 444, TORRE SUR, PISO 16, COL. VALLE DEL CAMPESTRE, SAN PEDRO GARZA GARCIA, NUEVO LEON 66265, MEXICO

Inventors:

#	Inventor's Name	Inventor's Address
1	RAYMOND ELBERT FOGLE	8 WAYLAND COURT, JOHNSON CITY, TN 37604, U.S.A.
2	RONALD BUFORD SHEPPARD	1900 ASHFIELD DRIVE, KINGSPORT, TN 37664, U.S.A.
3	TIMOTHY ALAN UPSHAW	478 OAK FOREST PLACE, KINGSPORT, TN 37664, U.S.A.
4	ALAN GEORGE WONDERS	155 OAKLAND DRIVE, LONGVIEW, TX 75605, U.S.A

PCT International Classification Number

C07C 51/265

PCT International Application Number

PCT/US2009/005756

PCT International Filing date

2009-10-22

PCT Conventions:

#	PCT Application Number	Date of Convention	Priority Country
1	61/110,235	2008-10-31	U.S.A.
2	12/556,101	2009-09-09	U.S.A.