Gerardo Antonio Montero

US Patent:

6615620, Sep 9, 2003

Filed:

Jun 25, 2001

Appl. No.:

09/888924

Inventors:

Walter A. Hendrix - Raleigh NC
Gerardo A. Montero - Garner NC
C. Brent Smith - Raleigh NC
Donald L. Butcher - Knightdale NC

Assignee:

North Carolina State University - Raleigh NC

International Classification:

D06F 3700

US Classification:

68207, 68184, 68189, 8475

Abstract:

A process for introducing a textile treatment material into a textile treatment system, particularly a supercritical fluid carbon dioxide (SCFâCO ) treatment system. The process includes the steps of providing a preparation vessel in fluid communication with a textile treatment system; loading a textile treatment material into the preparation vessel; dissolving or suspending the textile treatment material in near-critical liquid carbon dioxide or supercritical fluid carbon dioxide in the preparation vessel; and introducing the dissolved or suspended textile treatment material into the textile treatment system. The textile treatment material can be selected from a group including a brightening agent, a whitening agent and a dye. A system suitable for use in carrying out the process is also disclosed.

US Patent:

6261326, Jul 17, 2001

Filed:

Jan 13, 2000

Appl. No.:

9/482371

Inventors:

Walter A. Hendrix - Raleigh NC
Gerardo A. Montero - Garner NC
C. Brent Smith - Raleigh NC
Donald L. Butcher - Knightdale NC

Assignee:

North Carolina State University - Raleigh NC

International Classification:

D06P 336
D06P 500
D06B 512

US Classification:

8475

Abstract:

A process for introducing a textile treatment material into a textile treatment system, particularly a supercritical fluid carbon dioxide (SCF-CO. sub. 2) treatment system. The process includes the steps of providing a preparation vessel in fluid communication with a textile treatment system; loading a textile treatment material into the preparation vessel; dissolving or suspending the textile treatment material in near-critical liquid carbon dioxide or supercritical fluid carbon dioxide in the preparation vessel; and introducing the dissolved or suspended textile treatment material into the textile treatment system. The textile treatment material can be selected from a group including a brightening agent, a whitening agent and a dye. A system suitable for use in carrying out the process is also disclosed.

US Patent:

60483695, Apr 11, 2000

Filed:

Sep 29, 1998

Appl. No.:

9/162817

Inventors:

Carl Brent Smith - Raleigh NC
Gerardo A. Montero - Garner NC
Walter A. Hendrix - Raleigh NC

Assignee:

North Carolina State University - Releigh NC

International Classification:

D06P 100
D06P 500

US Classification:

8475

Abstract:

Processes for dyeing a hydrophobic textile fiber with a colorant material using a SCF--CO. sub. 2 dyebath are described. One process employs cooling, without venting or removing CO. sub. 2 from the system, to a target CO. sub. 2 temperature at or below the glass transition temperature of the hydrophobic fiber, followed by the venting of the dyeing system to atmospheric pressure. The other process employs venting, without cooling, to a target CO. sub. 2 density where dye is no longer soluble in the SCF--CO. sub. 2, followed by cooling to a target temperature and then venting to atmospheric pressure. Optionally, the temperature of the dyeing process is established by heating the process according to a selected temperature profile.

US Patent:

20200056326, Feb 20, 2020

Filed:

Oct 23, 2019

Appl. No.:

16/661698

Inventors:

- Beaverton OR, US
Gerardo A. Montero - Raleigh NC, US
Anand P. Kanchagar - Beaverton OR, US
Pankaj Rugnath Panchmatia - Beaverton OR, US

International Classification:

D06M 11/76
D06P 5/20
D06L 1/00
D06B 19/00

Abstract:

Supercritical fluid (“SCF”) is used to scour a target material to leave scour elements, such as oligomers and oils from the target material. Carbon dioxide (“CO”) is introduced into a pressure vessel also containing the target material to be scoured. The COis raised in temperature and pressure to a SCF state. The COis recirculated within the pressure vessel to scour the target material. An exchange of the COis occurs allowing for the scoured elements to be removed from the COand therefore from within the pressure vessel. Operation variables such as temperature, pressure, time, internal flow rate, and COexchange are adjusted to achieve a scouring of the target material.

US Patent:

20200056330, Feb 20, 2020

Filed:

Oct 23, 2019

Appl. No.:

16/661688

Inventors:

- Beaverton OR, US
Gerardo A. Montero - Raleigh NC, US
Anand P. Kanchagar - Beaverton OR, US
Pankaj Rugnath Panchmatia - Beaverton OR, US

International Classification:

D06P 1/94
D06P 5/20
D06B 19/00
D06M 23/10

Abstract:

Methods are directed to the use of a supercritical fluid for finishing a target material with a finishing material. One or more variables selected from temperature, pressure, flow rate, and time are manipulated to increase efficiencies in the finishing process. As temperature or pressure are decreased causing a change in the density of a supercritical fluid carbon dioxide, which in turn causes a precipitation of dissolved material finish with the carbon dioxide, other variables are maintained above threshold values to increase the uptake of the material finish by the target material. This improvement reduces time by limiting cleaning processes of the system, saves materials used in the cleaning process, and saves energy used to achieve cycles of the process, in aspects.

US Patent:

20160244909, Aug 25, 2016

Filed:

Feb 19, 2016

Appl. No.:

15/048655

Inventors:

- Beaverton OR, US
Gerardo A. Montero - Raleigh NC, US
Anand P. Kanchagar - Beaverton OR, US
Pankaj Rugnath Panchmatia - Beaverton OR, US

International Classification:

D06M 11/76
D06P 5/20

Abstract:

Supercritical fluid (“SCF”) is used to scour a target material to leave scour elements, such as oligomers and oils from the target material. Carbon dioxide (“CO”) is introduced into a pressure vessel also containing the target material to be scoured. The COis raised in temperature and pressure to a SCF state. The COis recirculated within the pressure vessel to scour the target material. An exchange of the COis occurs allowing for the scoured elements to be removed from the COand therefore from within the pressure vessel. Operation variables such as temperature, pressure, time, internal flow rate, and COexchange are adjusted to achieve a scouring of the target material.

US Patent:

20160244911, Aug 25, 2016

Filed:

Feb 19, 2016

Appl. No.:

15/048634

Inventors:

- Beaverton OR, US
Gerardo A. Montero - Raleigh NC, US
Anand P. Kanchagar - Beaverton OR, US
Pankaj Rugnath Panchmatia - Beaverton OR, US

International Classification:

D06P 1/94
D06P 5/20

Abstract:

Methods are directed to the use of a supercritical fluid for finishing a target material with a finishing material. One or more variables selected from temperature, pressure, flow rate, and time are manipulated to increase efficiencies in the finishing process. As temperature or pressure are decreased causing a change in the density of a supercritical fluid carbon dioxide, which in turn causes a precipitation of dissolved material finish with the carbon dioxide, other variables are maintained above threshold values to increase the uptake of the material finish by the target material. This improvement reduces time by limiting cleaning processes of the system, saves materials used in the cleaning process, and saves energy used to achieve cycles of the process, in aspects.