Chi Hung Cheng

US Patent:

6365773, Apr 2, 2002

Filed:

Jun 13, 2000

Appl. No.:

09/593292

Inventors:

Chi H. Cheng - Baton Rouge LA
Ronny W. Lin - Baton Rouge LA

Assignee:

Albemarle Corporation - Richmond VA

International Classification:

C07C 6500

US Classification:

562474, 562473, 560406

Abstract:

This invention describes processes for producing halomagnesium fluoroaryl carboxylates. In one such process, a fluoroaryl Grignard reagent is added to an anhydrous liquid ethereal medium pretreated with carbon dioxide.

US Patent:

6525208, Feb 25, 2003

Filed:

Apr 3, 2002

Appl. No.:

10/116508

Inventors:

Chi Hung Cheng - Baton Rouge LA
Gerald M. Sulzer - Baton Rouge LA

Assignee:

Albemarle Corporation - Richmond VA

International Classification:

C07D30112

US Classification:

549531, 549523, 549524

Abstract:

Mixed together are (i) hydrogen peroxide; (ii) 1-alkene; (iii) quaternary ammonium salt wherein at least one of the substituents contains at least six carbon atoms; (iv) boric acid, or both a 1,2-diol and boric acid; and (v) a preformed catalyst solution formed from hydrogen peroxide, at least one aqueous inorganic acid, and at least one tungstate salt, while water is continuously removed, such that a 1,2-epoxide is formed. A new method for purifying 1,2-epoxyalkanes is also described.

US Patent:

6528665, Mar 4, 2003

Filed:

Apr 3, 2002

Appl. No.:

10/116482

Inventors:

Chi Hung Cheng - Baton Rouge LA
Gerald M. Sulzer - Baton Rouge LA
John F. Balhoff - Baton Rouge LA

Assignee:

Albemarle Corporation - Richmond VA

International Classification:

C07D30132

US Classification:

549541, 549523, 549531, 549542, 568867, 568868

Abstract:

Epoxyalkanes are subjected to at least one of the following washing operations: (1) washing with aqueous inorganic base, and then with aqueous borohydride, or vice versa; or (2) washing with an aqueous solution of both inorganic base and borohydride. Undesirable odor is reduced or eliminated from alkanediol(s), if produced from the treated epoxyalkane(s) by hydrolysis. Use of such washing procedures in the production of alkanediols is also described.

US Patent:

7667066, Feb 23, 2010

Filed:

Feb 27, 2004

Appl. No.:

10/788850

Inventors:

Vincent J. Gatto - Baton Rouge LA, US
Hassan Y. Elnagar - Baton Rouge LA, US
Chi Hung Cheng - Baton Rouge LA, US
J. Robert Adams - Baton Rouge LA, US

Assignee:

Albemarle Corporation - Baton Rouge LA

International Classification:

C07C 69/76
C07C 69/00

US Classification:

560 75, 560130

Abstract:

A novel manufacturing process is described for producing hindered phenolic alkyl esters, which may be useful as antioxidants. This process simplifies catalyst neutralization and removal during the preparation of hindered phenolic esters. Compositions that comprise the hindered phenolic esters produced according to these methods are also described.

US Patent:

7871547, Jan 18, 2011

Filed:

Nov 12, 2004

Appl. No.:

11/718380

Inventors:

Milind M. Pradhan - Baton Rouge LA, US
Chi Hung Cheng - Baton Rouge LA, US
Rajeev S. Mathur - Baton Rouge LA, US
Richard A. Holub - Baton Rouge LA, US
Donald W. Imhoff - Baton Rouge LA, US

Assignee:

Albemarle Corporation - Richmond VA

International Classification:

C07F 1/02

US Classification:

260665G

Abstract:

This invention provides a process for reducing the amount of soluble halide in a solution comprising a liquid organic medium, at least one viscosity reducing agent, at least one dihydrocarbylmagnesium compound, and an initial amount of soluble halide. The process comprises mixing at least one alkali metal with the solution at a mole ratio of alkali metal to magnesium of less than about 1:2. 5, thereby forming precipitated soluble halides. Also provided by this invention is a process for reducing the amount of soluble halide in a slurry comprising a liquid organic medium, at least one viscosity reducing agent, at least one dihydrocarbylmagnesium compound, solids from the formation of said dihydrocarbylmagnesium compound, and an initial amount of soluble halide. This process comprises mixing at least one alkali metal with the slurry at a mole ratio of alkali metal to magnesium of less than about 1:1. 25, thereby forming precipitated soluble halides.

US Patent:

7988884, Aug 2, 2011

Filed:

Jan 26, 2010

Appl. No.:

12/693685

Inventors:

Vincent J. Gatto - Baton Rouge LA, US
Hassan Y Elnagar - Baton Rouge LA, US
Chi Hung Cheng - Baton Rouge LA, US
J. Robert Adams - Baton Rouge LA, US

Assignee:

Albemarle Corporation - Richmond VA

International Classification:

C10M 137/10
C08K 5/01
C09K 15/06
C11D 1/00
C07C 69/76
C07C 69/00

US Classification:

252407, 508369, 508516, 510488, 560 75, 560 61, 560130

Abstract:

A novel manufacturing process is described for producing hindered phenolic alkyl esters, which may be useful as antioxidants. This process simplifies catalyst neutralization and removal during the preparation of hindered phenolic esters. Compositions that comprise the hindered phenolic esters produced according to these methods are also described.

US Patent:

20070260089, Nov 8, 2007

Filed:

Mar 25, 2005

Appl. No.:

11/547333

Inventors:

Joe Sauer - Baton Rouge LA, US
Christopher Knight - Prairieville LA, US
Charles Everly - Baton Rouge LA, US
Chi Hung Cheng - Baton Rouge LA, US

Assignee:

Albemarle Corporation - Baton Rouge LA

International Classification:

C07C 211/62

US Classification:

564281000

Abstract:

A novel manufacturing process is described for producing quaternary ammonium compounds having a selected anion, which may be useful in wood preservative formulations. The process involves reacting a trialkylamine with an alkyl bromide to form a quaternary tetraalkylammonium bromide salt, converting the quaternary tetraalkylammonium bromide salt to a quaternary tetraalkylammonium hydroxide salt by using an ion exchange resin, and converting the quaternary tetraalkylammonium hydroxide salt to the quaternary tetraalkylammonium salt of the selected anion.

US Patent:

20120053373, Mar 1, 2012

Filed:

Apr 29, 2010

Appl. No.:

13/264184

Inventors:

Zhongxin Ge - Baton Rouge LA, US
Arthur G. Mack - Prairieville LA, US
Chi Hung Cheng - Baton Rouge LA, US
Neal J. Colonius - Baton Rouge LA, US
Sarah C. Jones - Baton Rouge LA, US
Steven A. Anderson - Baton Rouge LA, US

Assignee:

ALBEMARLE CORPORATION - Baton Rouge LA

International Classification:

C07C 25/18

US Classification:

570206

Abstract:

Described is process technology for producing brominated aromatic polymer compositions from low molecular weight aromatic polymer compositions. The specified conditions used in the process enable the formation of products having superior color and thermal stability properties.