Joy L Mendoza

US Patent:

6514468, Feb 4, 2003

Filed:

Apr 9, 2001

Appl. No.:

09/828752

Inventors:

Michael Stanley DeCourcy - Houston TX
Michel Gene Woody - Deer Park TX
Karen Ann Shaw - League City TX
Joy Lyndon Mendoza - Lansdale PA

Assignee:

Rohm and Haas Company - Philadelphia PA

International Classification:

B01D 5334

US Classification:

422177, 422180, 422211

Abstract:

This invention relates to an improved catalyst system utilizing flow through radiation shielding of the reaction zone and to processes for using the catalyst system for the production of hydrogen cyanide. The process has decreased methane usage while maintaining yield of cyanide.

US Patent:

7220879, May 22, 2007

Filed:

Sep 19, 2005

Appl. No.:

11/229916

Inventors:

Stephen Bass - Pearland TX, US
Robert Michael Mason - Houston TX, US
Joy Lyndon Mendoza - Seabrook TX, US
Steven John Skoog - Houston TX, US
Mark T. Vandersall - Jamison PA, US

Assignee:

Rohm and Haas Company - Philadelphia PA

International Classification:

C07C 69/52
C07C 57/02

US Classification:

560205, 562598

Abstract:

This invention relates to a method for inhibiting polymerization of (meth)acrylic acid and its esters using a polymerization inhibitor which comprises at least one reduced halide-content azine dye-based compound. A process for producing reduced halide-content azine dye-based compounds using ion exchange resin technology is also provided.

US Patent:

7253279, Aug 7, 2007

Filed:

Apr 5, 2007

Appl. No.:

11/732971

Inventors:

Stephen Bass - Pearland TX, US
Robert Michael Mason - Houston TX, US
Joy Lyndon Mendoza - Seabrook TX, US
Steven John Skoog - Houston TX, US
Mark T. Vandersall - Jamison PA, US

Assignee:

Rohm and Haas Company - Philadelphia PA

International Classification:

C07D 279/18

US Classification:

544 37

Abstract:

This invention relates to a method for inhibiting polymerization of (meth)acrylic acid and its esters using a polymerization inhibitor which comprises at least one reduced halide-content azine dye-based compound. A process for producing reduced halide-content azine dye-based compounds using ion exchange resin technology is also provided.

US Patent:

8044237, Oct 25, 2011

Filed:

Jun 1, 2009

Appl. No.:

12/455361

Inventors:

Keith F. Briegel - Houston TX, US
Michael Stanley DeCourcy - Houston TX, US
James Elder - Houston TX, US
James Jerrick Juliette - Houston TX, US
Joy Lydon Mendoza - Lansdale PA, US

Assignee:

Rohm and Haas Company - Philadelphia PA

International Classification:

C07C 51/42

US Classification:

562600

Abstract:

The present invention relates to recovery of aqueous (meth)acrylic acid by condensation of a (meth)acrylic acid-containing stream to produce aqueous (meth)acylic acid having a higher concentration of (meth)acrylic acid and a lower concentration of formaldehyde, i. e. , not more than 0. 1 weight %, than the aqueous (meth)acrylic acid produced using hithertofore known separation methods. The (meth)acrylic acid-containing stream may be the raw product stream of catalytic oxidation at least one C-Calkane or alkene.

US Patent:

8044238, Oct 25, 2011

Filed:

Jun 1, 2009

Appl. No.:

12/455371

Inventors:

Keith F. Briegel - Houston TX, US
Michael Stanley DeCourcy - Houston TX, US
James Elder - Houston TX, US
James Jerrick Juliette - Houston TX, US
Joy Lydon Mendoza - Lansdale PA, US

Assignee:

Rohm and Haas Company - Philadelphia PA

International Classification:

C07C 51/42

US Classification:

562600

Abstract:

The present invention relates to reducing corrosion of distillation equipment during azeotropic distillation of (meth)acrylic acid in the presence of dissolved copper, by providing aqueous (meth)acrylic acid having not more than 0. 1% by weight formaldehyde, based on the total weight of the aqueous (meth)acrylic acid. The source of the copper may, for example, be copper-based polymerization inhibitors added to the aqueous (meth)acrylic acid and/or distillation equipment.

US Patent:

20130014645, Jan 17, 2013

Filed:

Jul 13, 2012

Appl. No.:

13/548800

Inventors:

Marc Charendoff - Houston TX, US
Jamie Jerrick Juliette - Houston TX, US
Joy Mendoza - Seabrook TX, US
Rajesh Shah - Katy TX, US

International Classification:

B01D 53/14
C02F 1/04

US Classification:

95193

Abstract:

The present invention provides a method for removal of organic compounds, such as acetic acid, from waste water streams in processes for production of (meth)acrylic acid. In particular, a mixed product gas, comprising (meth)acrylic acid, acetic acid, propylene and acrolein, is subjected to fractional absorption to produce an aqueous product stream comprising (meth)acrylic acid, water and acetic acid, and an absorber off-gas stream comprising propylene and acrolein. The aqueous product stream is distilled to produce a purified (meth)acrylic acid stream and a waste water stream comprising water and acetic acid. The absorber off gas is then contacted with the waste water stream and at least a portion of the acetic acid moves from the waste water stream to the absorber off gas to produce a stripped waste water stream and an enriched absorber off gas.

US Patent:

20130281737, Oct 24, 2013

Filed:

Nov 30, 2011

Appl. No.:

13/976278

Inventors:

Jamie Jerrick Juliette - Houston TX, US
Joy Mendoza - Seabrook TX, US
Rajesh Shah - Katy TX, US

Assignee:

ROHM AND HAAS COMPANY - Philadelphia PA

International Classification:

C07C 51/44

US Classification:

562600

Abstract:

The present invention provides a method for reducing fouling of equipment during separation and purification steps of (meth)acrylic acid production by early removal of aldehyde impurities by adding a hydrazide compound well upstream of the separation and purification steps. In particular, carbodhydrazide may be added as an aldehyde scavenging agent to aqueous (meth)acrylic acid prior to dehydration and purification steps.

US Patent:

20200230577, Jul 23, 2020

Filed:

Feb 20, 2017

Appl. No.:

16/485982

Inventors:

- Collegeville PA, US
Philippe P. Maillot - Kingwood TX, US
Joy L. Mendoza - Seabrook TX, US

International Classification:

B01J 23/42
B01J 23/46
B01J 35/06
B01J 12/00

Abstract:

The present invention provides materials for improving the ignition of gaseous reactants in metal catalyzed oxidation reactions comprising a metal catalyst gauze, preferably, a platinum/rhodium catalyst gauze, having in contact therewith, from 0.5 to 1.5 wt. %, based on the weight of the metal catalyst gauze, of one or more pieces of previously used metal catalyst gauze. Further, methods of making the metal catalyst materials comprise shaping the pieces of previously used metal catalyst gauze and placing them equidistant from each other in contact with or on the surface of the metal catalyst gauze. And methods of using the materials comprise feeding into the reactor a gas mixture of oxygen or air and one or more reactant gases, and igniting the gas mixture at the surface of one or more or all of the pieces of previously used metal catalyst.