Ting C Ho

US Patent:

6410812, Jun 25, 2002

Filed:

Mar 1, 2000

Appl. No.:

09/516578

Inventors:

Kenneth D. Hope - Kingwood TX
Ting C. Ho - Kingwood TX
David L. Archer - Decatur AL
Russell J. Bak - The Woodlands TX
J. Barry Collins - New Caney TX
Doug W. Burns - Kingwood TX

Assignee:

Chevron Phillips Chemical Company LP - Houston TX

International Classification:

C07C 208

US Classification:

585525, 585800, 585904, 585906

Abstract:

In a process for the oligomerization of alpha olefins using a boron trifluoride/alcohol catalyst complex a method for recovering the boron trifluoride from the product stream which comprises lowering the pressure of the product stream to flash off excess boron trifluoride, mixing the boron trifluoride with fresh alcohol to form fresh boron trifluoride/alcohol catalyst complex, and introducing the fresh catalyst back into the oligomerization reactor.

US Patent:

58178996, Oct 6, 1998

Filed:

Jun 16, 1997

Appl. No.:

8/876778

Inventors:

Kenneth D. Hope - Kingwood TX
Ting C. Ho - Kingwood TX
Barrett L. Cupples - Kingwood TX

Assignee:

Chevron Chemical Company - San Ramon CA

International Classification:

C07C 900
C07C 202

US Classification:

585 16

Abstract:

A dimer composition has an improved low temperature viscosity if it has less than a certain amount of normal paraffin. A 1-octene dimer should have less than 0. 50 wt. % normal hexadecane, a 1-decene dimer should have less than 0. 05 wt. % normal eicosane, a 1-dodecene dimer should have less than 0. 60 wt. % normal tetracosane, and a 1-tetradecene dimer should have less than 0. 10 wt. % normal octacosane.

US Patent:

54203732, May 30, 1995

Filed:

Mar 24, 1994

Appl. No.:

8/217265

Inventors:

Kenneth D. Hope - Kingwood TX
Ting C. Ho - Kingwood TX
Barrett L. Cupples - Kingwood TX

Assignee:

Chevron Chemical Company - San Francisco CA

International Classification:

C07C 208

US Classification:

585525

Abstract:

An oligomer is made by contacting a straight-chain,. alpha. -olefinic monomer with boron trifluoride and a hydroxy carbonyl promoter. The hydroxy carbonyl is preferably a. beta. -hydroxy-ketone, such as 4-hydroxy-4-methyl-2-pentanone. A second promoter can be used in conjunction with the boron trifluoride and the hydroxy carbonyl promoter. Possible secondary promoters include aldehydes, alcohols, alcohol alkoxylates, carboxylic acids, ethers, ketones, and their mixtures. Preferably the oligomer product has a kinematic viscosity at 100. degree. C. of less than 1. 7 cSt; has a dimer to trimer and higher oligomer ratio of at least 1:1; and is at least 90 wt. % dimer and trimer of the monomer.

US Patent:

55503071, Aug 27, 1996

Filed:

Aug 31, 1994

Appl. No.:

8/298635

Inventors:

Kenneth D. Hope - Kingwood TX
Ting C. Ho - Kingwood TX
Barrett L. Cupples - Kingwood TX

Assignee:

Chevron Chemical Company - San Ramon CA

International Classification:

C07C 214

US Classification:

585525

Abstract:

An oligomer is made by contacting an olefinic monomer with a catalyst comprising boron trifluoride, an alcohol alkoxylate, and a ketone. In one embodiment, the olefinic monomer is a straight-chain,. alpha. -olefinic monomer containing from 8 to 12 carbon atoms, the alcohol alkoxylate is 2-ethoxyethanol, the ketone is methyl ethyl ketone, and the oligomer product has a kinematic viscosity at 100. degree. C. of less than 1. 7 cSt. Before removal of unreacted monomer, the oligomer product is at least 50 wt. % dimer, at least 80 wt. % dimer plus trimer, and less than 3. 25 wt. % tetramer and greater.