William Brian Cross

US Patent:

20040069683, Apr 15, 2004

Filed:

Aug 19, 2002

Appl. No.:

10/223192

Inventors:

Lawrence Smith - Houston TX, US
William Cross - Seabrook TX, US

Assignee:

CATALYTIC DISTILATION TECHNOLOGIES

International Classification:

C10G035/00

US Classification:

208/146000

Abstract:

A method of operating a multi-phase downflow reactor so as to induce a pulsing flow regime is disclosed. The pulse may be induced by increasing the gas rate while maintaining the liquid rate until a pressure drop sufficient to induce the pulse flow is achieved. The method is particularly useful in the sulfuric acid catalyzed alkylation of olefins in a reactor packed with a stainless steel/polypropylene mesh.

US Patent:

20040204622, Oct 14, 2004

Filed:

Apr 19, 2004

Appl. No.:

10/827648

Inventors:

Lawrence Smith - Houston TX, US
William Cross - Seabrook TX, US

International Classification:

C07C002/58

US Classification:

585/731000

Abstract:

A method of operating a multi-phase downflow reactor so as to induce a pulsing flow regime is disclosed. The pulse may be induced by increasing the gas rate while maintaining the liquid rate until a pressure drop sufficient to induce the pulse flow is achieved. The method is particularly useful in the sulfuric acid catalyzed alkylation of olefins in a reactor packed with a stainless steel/polypropylene mesh.

US Patent:

20070161843, Jul 12, 2007

Filed:

Feb 22, 2007

Appl. No.:

11/709381

Inventors:

Lawrence Smith - Houston TX, US
William Cross - Seabrook TX, US

International Classification:

C07C 2/58

US Classification:

585731000

Abstract:

A method of operating a multi-phase downflow reactor so as to induce a pulsing flow regime is disclosed. The pulse may be induced by increasing the gas rate while maintaining the liquid rate until a pressure drop sufficient to induce the pulse flow is achieved. The method is particularly useful in the sulfuric acid catalyzed alkylation of olefins in a reactor packed with a stainless steel/polypropylene mesh.

US Patent:

20070238912, Oct 11, 2007

Filed:

Apr 11, 2006

Appl. No.:

11/402079

Inventors:

Lawrence Smith - Houston TX, US
William Cross - Pasadena TX, US

International Classification:

C07C 2/56
C07C 4/00

US Classification:

585716000, 585332000

Abstract:

A process for the alkylation of isobutane is disclosed wherein isobutane is fed to two separate alkylation systems. The effluent from the first alkylation system is fed to an interim debutanizer where the C's are separated from the alkylate product. The overhead Cproduct is then fed to the second alkylation system to provide the isobutane. The effluent from the second alkylation system is fed to a traditional deisobutanizer to prevent any build up of normal butanes in the system.

US Patent:

20080045763, Feb 21, 2008

Filed:

Aug 16, 2006

Appl. No.:

11/505029

Inventors:

William M. Cross - Houston TX, US
Lawrence A. Smith - Houston TX, US

International Classification:

C07C 1/00
C07C 2/00

US Classification:

585332

Abstract:

A process for paraffin alkylation of isoalkane with isoolefins in which an olefin component comprising oligomerized propylene, oligomerized isoolefin or mixtures thereof is fed to a paraffin alkylation unit wherein the dissociated olefin components forming the oligomers react with isoalkane to produce a reaction mixture containing an alkylate and unreacted isoalkane The reaction mixture is fractionally distilled to recover unreacted isoalkane as overheads and alkylate as bottoms. The stoichiometry of isoolefins to isoalkane in the alkylation unit is maintained by adjustment of the feed to the oligomerization, for example, by adding fresh isoalkane to the recovered, unreacted isoalkane from the alkylation unit being recycled to the oligomerization. Alternatively, a portion of the recovered unreacted isoalkane is dehydrogenation to an isoolefin which is added to the oligomerization.