Gary L Sharp

US Patent:

6964728, Nov 15, 2005

Filed:

May 16, 2002

Appl. No.:

10/147621

Inventors:

Bonnie G. McKinnie - Magnolia AR, US
Robert E. Williams - Magnolia AR, US
Gary L. Sharp - Magnolia AR, US
Alireza M. Dadgar - Magnolia AR, US

International Classification:

B01D003/34
C07C027/28
C07C029/80

US Classification:

203 6, 203 19, 203 38, 203 41, 203 47, 203 57, 203100, 203DIG 13, 568749, 568890, 568913

Abstract:

Bisphenol-A-bis(neopentylglycolphosphate) products of enhanced properties and processes for preparing them are described. One of the processes includes (a) mixing and reacting neopentyl glycol and bisphenol-A-bis(dichlorophosphate) in an inert polar organic solvent which (1) if mixed by itself with an equal volume of water at 25 C. , will form a separate phase, (2) the solvent by itself will dissolve at least about 10 wt % of bisphenol-A-bis(neopentylglycolphosphate) at a temperature in the range of 25 to 50 C. , and optionally but preferably (3) the solvent by itself can be completely vaporized at a temperature below about 180 C. ; (b) washing bisphenol-A-bis(neopentylglycolphosphate) product formed in a) while dissolved in inert organic solvent having such characteristics at least once with an aqueous alkaline washing solution; and (c) optionally but preferably, recovering bisphenol-A-bis(neopentylglycolphosphate) product from organic solvent having such characteristics. The reaction of (a) can be conducted in an inert non-polar solvent if that solvent is replaced by an inert polar organic solvent satisfying (1) and (2), and preferably (3). A solvent satisfying (1), (2), and (3) is used when (c) is conducted by distilling or vaporizing off the solvent to recover the bisphenol-A-bis(neopentylglycolphosphate) product as such.

US Patent:

20130287675, Oct 31, 2013

Filed:

Dec 28, 2011

Appl. No.:

13/997964

Inventors:

William B. Harrod - Minden LA, US
John M. Harden - Magnolia AR, US
Gary L. Sharp - Magnolia AR, US
Robert E. Williams - Magnolia AR, US

Assignee:

Albemarle Corporation - Baton Rouge LA

International Classification:

C01B 7/09

US Classification:

423488

Abstract:

A new, highly selective way of removing bromine contamination from a gaseous stream comprised of hydrogen bromide and bromine is described. Such process technology involves non-catalyzed free radical (benzylic) bromination of an alkylene-bridged aromatic hydrocarbon and/or certain alkyl-substituted aromatic hydrocarbons and recovering the purified gaseous HBr. Because of the high selectivity of the bromination on the aliphatic bridges or side-chains, virtually no ring bromination occurs, and this enables recovery of the bromine values in the form of HBr. Thus preferably, the bromine is recovered as HBr from the scrubbing liquid by subjecting the scrubbing liquid to thermal or catalytic dehyrobromination. In plant operations, the gaseous HBr purified in the process can then be introduced into a compressor to produce either liquid or gaseous HBr for storage under pressure. Alternatively, the purified gaseous HBr can be fed directly into one or more reactions in which HBr is used as a reactant.

US Patent:

52083896, May 4, 1993

Filed:

Apr 1, 1992

Appl. No.:

7/861544

Inventors:

Bonnie G. McKinnie - Magnolia AR
Gary L. Sharp - Magnolia AR

Assignee:

Ethyl Corporation - Richmond VA

International Classification:

C07C 39367
C07C 3768

US Classification:

568726

Abstract:

The quality of a product predominant in tetrabromobisphenol-A is enhanced by contacting the product with a quality enhancing amount of treated water and heat treating the product for a period of time and at a temperature which are sufficient to obtain a TBBPA predominant product having less than about 20 ppm of ionic impurities.

US Patent:

52833755, Feb 1, 1994

Filed:

Dec 15, 1992

Appl. No.:

7/990414

Inventors:

Bonnie G. McKinnie - Magnolia AR
Gary L. Sharp - Magnolia AR
Robert E. Williams - Magnolia AR

Assignee:

Ethyl Corporation - Richmond VA

International Classification:

C07C 3938
C07C 39367

US Classification:

568726

Abstract:

This invention relates to a process for preparing a flame retardant product predominant in tetrabromobisphenol-A. The process comprises: (a) dissolving bisphenol-A in a methanol solvent containing up to about 5 weight percent water, wherein the ratio of methanol to bisphenol-A ranges from about 25 to about 43 moles of methanol per mole of bisphenol-A based on the total amount of methanol used and the total amount of bisphenol-A to be brominated; (b) adding to the solution in (a) from about 3. 9 to about 4. 2 moles of bromine per mole of bisphenol-A to be brominated while maintaining a reaction temperature in the range of from about 0. degree. to about 40. degree. C. ; (c) after the bromination is substantially complete, adding water to precipitate the tetrabromobisphenol-A thus formed; and (d) purifying the precipitated tetrabromobisphenol-A so as to obtain a product predominant in tetrabromobisphenol-A containing less than about 20 ppm total ionic impurity.

US Patent:

20150147265, May 28, 2015

Filed:

May 24, 2013

Appl. No.:

14/405201

Inventors:

- Baton Rouge LA, US
John M. Harden - Zachary LA, US
Rhett P. Heeb - Magnolia AR, US
Steven G. Karseboom - Baton Rouge LA, US
Gary L. Sharp - Magnolia AR, US
Robert E. Williams - Boles AR, US

International Classification:

C01B 7/09

US Classification:

423488

Abstract:

Processes of and systems for removing free bromine from gaseous anhydrous HBr contaminated with free bromine are described. In one type of process the gaseous contaminated HBr is fed into countercurrent contact with at least one liquid alkylaromatic hydrocarbon within a packed section of a column while maintaining the packed section under free radical bromination conditions so that one or more than one liquid a-bromoalkylaromatic compound is produced along with one mole of gaseous HBr per mole of a-bromoalkylaromatic compound produced. In another type of process the gaseous anhydrous HBr is fed into countercurrent contact through at least two scrubbers so that the gaseous anhydrous HBr is scrubbed substantially free of bromine by passage through these at least two scrubbers, each of which contains a different specified type of scrubbing liquid. In one embodiment the liquid alkylaromatic hydrocarbon comprises 1,2-diphenylethane.