Ronny W. Lin
Engineering at President Dr, Baton Rouge, LA

5760262, Jun 2, 1998

Jun 17, 1997

8/877227

Troy E. DeSoto - Baton Rouge LA
Ronny W. Lin - Baton Rouge LA
John F. Balhoff - Baton Rouge LA

Albemarle Corporation - Richmond VA

C07F 708

556 11

The reaction between a hafnium tetrahalide-diamine adduct and a metallated bis(cyclopentadienyl-moiety containing) ligand, offers great promise as a way of producing racemic hafnocenes, but involves a number of complications. Tetrahydrofuran, a commonly-used solvent/diluent for such reactions, when present in substantial portions in the liquid reaction medium containing the reactants and/or reaction product(s) has been found to cause a substantial reduction in yields of chiral hafnocenes. Apparently the presence of a substantial amount of THF causes or at least results in the formation of increased amounts of the undesirable meso isomer, tends to cause or result in tar formation, and results in a product having poor filterability. Thus large amounts of THF if fed to the reactor with the reactant(s) are purged to a suitably low level, replaced by a liquid aromatic hydrocarbon, and then the reaction mixture is heated to a higher reaction temperature. Large amounts of liquid paraffins and free diamine in the reaction mixture during reaction also contribute to tar formation and reduction in yields of chiral hafnocene.

7638583, Dec 29, 2009

Dec 19, 2006

11/612991

Charles H. Kolich - Baton Rouge LA, US
John F. Balhoff - Baton Rouge LA, US
Martin B. Berdon - Baton Rouge LA, US
Ronny W. Lin - Baton Rouge LA, US

Albemarle Corporation - Richmond VA

C08F 12/08

5253333, 5253334, 525356, 525357, 525370, 526346

Concurrently fed into a reaction zone held at about 10° C. or less are brominating agent, aluminum halide catalyst, and a solution of anionic styrenic polymer having a GPC Mn about 2000-30,000. The components are in at least two separate feed streams. The feeds are proportioned to maintain (a) the amount of aluminum halide being fed at about 0. 8 mole percent or less based on the amount of aromatic monomeric units in the polymer being fed, and (b) amounts of brominating agent and unbrominated polymer in the reaction zone that produce a final washed and dried polymer product containing about 60-71 wt % bromine. The catalyst is deactivated, bromide ions and catalyst residues are washed away from the reaction mixture, and the brominated anionic styrenic polymer is recovered and dried. The dried polymer has a volatile bromobenzene content of about 600 ppm (wt/wt) or less as well as other beneficial properties.

5550303, Aug 27, 1996

Jun 2, 1995

8/459080

Ronny W. Lin - Baton Rouge LA
Robert H. Allen - Baton Rouge LA
Andrew D. Overstreet - Baton Rouge LA

Amoco Corporation - Chicago IL

C07F 506

585328

Olefin is formed by displacing alkyl groups of aluminum trialkyl by contacting ethylene with the aluminum trialkyl in an ethylene:aluminum trialkyl mol ratio in the range of 2-8:1 at about 0. degree. -70. degree. C. and at atmospheric up to about 1000 psia pressure, for a reaction time of about 0. 5 to about 60 minutes in the presence of a displacement enhancing amount of a nickel- or cobalt-containing displacement catalyst. Despite the fact that the displacement reaction is an equilibrium reaction, the process does not use, as did the prior art, large excesses of ethylene to shift the equilibrium to favor displacement. Consequently, the volumes of ethylene used in the processing are reduced very substantially and yet yields of the desired displaced alpha olefin remain favorable. Additionally, inasmuch as the process is conducted at relatively low temperatures and does not require high pressures, the energy requirements for the process are modest--far less, for example, than required in thermal displacement operations.

5274153, Dec 28, 1993

Nov 23, 1992

7/980026

Robert H. Allen - Baton Rouge LA
Ronny W. Lin - Baton Rouge LA
Andrew D. Overstreet - Baton Rouge LA

Ethyl Corporation - Richmond VA

C07F 506

556187

Linear 1-olefins are continuously prepared from internal olefins by (i) continuously feeding internal olefin, isomerization catalyst and tri-lower alkyl aluminum to a reaction zone so as to cause the internal olefin to isomerize to 1-olefins which displace the lower alkyl groups to form a trialkyl aluminum compound in which at least one of the alkyl groups is a linear alkyl derived from the 1-olefin, (ii) continuously removing trialkylaluminum compound from the reaction zone and, thereafter (iii) reacting the trialkyl aluminum compound with a 1-olefin so as to displace the linear alkyl from the trialkyl aluminum compound, thereby forming a linear 1-olefin product which is substantially free of internal olefins.

6248265, Jun 19, 2001

Jun 16, 2000

9/596146

John Y. Lee - Baton Rouge LA
David W. Owens - Baton Rouge LA
Charles R. Everly - Baton Rouge LA
Ronny W. Lin - Baton Rouge LA
John M. Power - Baton Rouge LA
Steven P. Diefenbach - Baton Rouge LA
Niomi L. Krzystowczyk - Orangeburg SC

Albemarle Corporation - Richmond VA

C07F 302, C07B 4900

260665

Fluoroaryl Grignard reagents are produced from a hydrocarbyl Grignard reagent and fluoroaromatic compounds via separate additions of different fluoroaromatic compounds, such that the conversion of hydrocarbyl Grignard reagent to the desired fluoroaryl Grignard reagent is essentially complete, and thus the reaction product is free or essentially free of agents that may negatively affect subsequent reactions. The fluoroaryl Grignard reagents may be further reacted with boron trihalides in order to obtain tris(fluoroaryl)boranes or tetrakis(fluoroaryl)borates.

5959151, Sep 28, 1999

Apr 9, 1998

9/058408

John Y. Lee - Baton Rouge LA
Steven P. Diefenbach - Baton Rouge LA
John M. Power - Baton Rouge LA
Ronny W. Lin - Baton Rouge LA

Albemarle Corporation - Richmond VA

C07F 502

568 1

One aspect of the invention is a process for purifying a pentafluorophenyl boron compound from a crude mixture comprised of the pentafluorophenyl boron compound and impurities, the impurities at least comprised of an ether and water, the process comprising: (a) mixing the crude mixture with an azeotropic organic solvent which (i) is capable of azeotrope formation with the water and (ii) has a boiling point above the boiling point of the ether; (b) distilling the resulting solution to remove at least a portion of the impurities; and (c) cooling the distilled solution so that a precipitate comprised of the pentafluorophenyl boron compound is formed. Processes are also described for producing pentafluorophenyl boron compounds which are particularly pure, dry and fine.

5278334, Jan 11, 1994

Oct 1, 1992

7/955217

Ronny W. Lin - Baton Rouge LA

Ethyl Corporation - Richmond VA

C07C 6976, C07C 5110

560105

A method for racemizing an optically active aliphatic carboxylic acid, or ester thereof, of the formula: ##STR1## where R. sub. 1 is hydrogen or C. sub. 1 to C. sub. 6 linear or branched alkyl; R. sub. 2, R. sub. 3 and R. sub. 4 are different and are hydrogen or C. sub. 1 to C. sub. 6 linear or branched alkyl, C. sub. 1 to C. sub. 6 linear or branched haloalkyl, aralkyl, cycloalkyl, alkyl substituted cycloalkyl, C. sub. 6 to C. sub. 10 aryl, C. sub. 1 to C. sub. 6 linear or branched alkoxy, C. sub. 6 to C. sub. 10 aryloxy, C. sub. 1 to C. sub. 6 alkylthio, C. sub. 2 to C. sub. 8 cycloalkylthio, C. sub. 6 to C. sub. 10 arylthio, C. sub. 6 to C. sub. 10 arylcarbonyl, C. sub. 4 to C. sub. 8 cycloalkenyl, trifluoromethyl, halo, C. sub. 4 to C. sub. 5 heteroaryl, C. sub. 10 to C. sub.

4911758, Mar 27, 1990

Nov 14, 1988

7/270830

Ronny W. Lin - Baton Rouge LA
Howard W. Walker - Baton Rouge LA
Yung-Fu Huang - Baton Rouge LA

Ethyl Corporation - Richmond VA

C04B 702

106 89

Boron trifluoride wash water from an olefin oligomerization process can be disposed of in an environmentally safe manner by hydrolysis to substantially eliminate fluoroborate anions (BF. sub. 4 --), mixing with CaO or Ca(OH). sub. 2 and concentration in any sequence followed by mixing with portland cement and solidification. The cured cement is highly resistant to aqueous leach of boron and fluorine containing products.

5883278, Mar 16, 1999

Jan 20, 1997

8/945653

Jamie R. Strickler - Baton Rouge LA
John M. Power - Baton Rouge LA
Ronny W. Lin - Baton Rouge LA
Troy E. DeSoto - Baton Rouge LA
John F. Balhoff - Baton Rouge LA

Albemarle Corporation - Richmond VA

C07F 1700, C07F 700, C07F 900

556 53

Chiral metallocenes are prepared by reacting a salt of an asymmetric bis(cyclopentadienyl) moiety containing ligand with a chelate diamine adduct of a transition, lanthanide, or actinide metal halide in an organic solvent medium so as to produce said chiral metallocene.

4902846, Feb 20, 1990

Feb 2, 1989

7/305716

Thomas J. DiLeo - Baton Rouge LA
Matthew J. Lynch - Baton Rouge LA
Marshall B. Nelson - Baton Rouge LA
Ronny W. Lin - Baton Rouge LA

Ethyl Corporation - Richmond VA

C07C 204, C07C 202

585525

C. sub. 8-14. alpha. -olefins are oligomerized to a oligomer mixture containing a high content of tetramer by feeding the. alpha. -olefin to a reaction vessel at a controlled rate over an extended period and in the presence of BF. sub. 3 and a promoter such as an alcohol.