Gregory J Pearson

US Patent:

6503867, Jan 7, 2003

Filed:

Aug 11, 2000

Appl. No.:

09/636690

Inventors:

Dennis Stamires - Newport Beach CA
Paul OConnor - Hoevelaken, NL
Gregory Pearson - Seabrook TX
William Jones - Cambridge, GB

Assignee:

Akzo Nobel N.V.

International Classification:

B01J 2300

US Classification:

502335, 502202, 502208, 502232, 502302, 502341, 502351, 502355, 501127, 423275, 423600, 423625, 423628, 423629

Abstract:

The present invention pertains to a quasi-crystalline boehmite containing additive in a homogeneously dispersed state. Suitable additives are compounds containing elements selected from the group of alkaline earth metals, alkaline metals, transition metals, actinides, silicon, gallium, boron, titanium, and phosphorus. Said QCBs according to the invention may be prepared in several ways. In general, a quasi-crystalline boehmite precursor and an additive are converted to a quasi-crystalline boehmite containing the additive in a homogeneously dispersed state.

US Patent:

6506358, Jan 14, 2003

Filed:

Aug 11, 2000

Appl. No.:

09/636694

Inventors:

Dennis Stamires - Newport Beach CA
Paul OConnor - Hoevelaken, NL
Gregory Pearson - Seabrook TX
William Jones - Cambridge, GB

Assignee:

Akzo Nobel B.V.

International Classification:

C01F 700

US Classification:

423625, 423628, 423630, 423275

Abstract:

The present invention pertains to an improved process for the preparation of quasi-crystalline boehmite. In this improved process a quasi-crystalline boehmite precursor is aged at a pH below 7, prefereably under hydrothermal conditions. It was found that when conducting the preparation processes for quasi-crystalline aluminas described in the prior art at a pH below 7 and under hydrothermal conditions instead of the high pH and thermal aging used in the prior art, QCBs with higher crystallinity are obtained. In the process according to the invention additives may be added to the quasi-crystalline boehmite precursor. This results in a high quality QCB with additives in a homogeneously dispersed state. Suitable additives are compounds containing elements selected from the group of rare earth metals alkaline earth metals, transition metals, actinides, silicon, gallium, boron, and phosphorus.

US Patent:

6555496, Apr 29, 2003

Filed:

Aug 11, 2000

Appl. No.:

09/636688

Inventors:

Dennis Stamires - Newport Beach CA
Paul OConnor - Hoevelaken, NL
Gregory Pearson - Seabrook TX
William Jones - Cambridge, GB

Assignee:

Akzo Nobel N.V.

International Classification:

B01J 2340

US Classification:

502327, 502314, 502320, 502322, 502323, 502332, 502333, 502334, 502335, 502336, 502341, 502342, 502346, 502348, 502351, 502355, 502414, 502415, 502439, 423625, 423628, 423629

Abstract:

A microcrystalline boehmite containing additive in a homogeneously dispersed state. Suitable additives are compounds containing elements selected from the group consisting of alkaline earth metals, alkaline metals, rare earth metals, transition metals, actinides, silicon, gallium, boron, titanium, and phosphorus. The microcrystalline boehmite according to the invention may be prepared in several ways. In general, a microcrystalline boehmite precursor and an additive are converted to a microcrystalline boehmite containing the additive in a homogeneously dispersed state. The additive does not contain zirconia or magnesia.

US Patent:

6689333, Feb 10, 2004

Filed:

Aug 11, 2000

Appl. No.:

09/636692

Inventors:

Dennis Stamires - Newport Beach CA
Paul OConnor - Hoevelaken, NL
Gregory Pearson - Seabrook TX
William Jones - Cambridge, GB

Assignee:

Akzo Nobel N.V. - Arnhem

International Classification:

C01F 700

US Classification:

423275, 423625, 423628

Abstract:

The present invention pertains to cheaper process for the preparation of quasi-crystalline boehmite containing additive in a homogeneously dispersed state. In this cheaper process an inexpensive quasi-crystalline boehmite precursor is and additive are combined and aged to form a quasi-crystalline boehmite containing additive in a homogeneously dispersed state. Suitable inexpensive quasi-crystalline boehmite precursors are aluminum trihydrate and thermally treated forms thereof and inorganic aluminum salts. Suitable additives are compounds containing elements selected from the group of rare earth metals alkaline earth metals, transition metals, actinides, silicon, gallium, boron, and phosphorus.

US Patent:

7208446, Apr 24, 2007

Filed:

Nov 18, 2002

Appl. No.:

10/298734

Inventors:

Dennis Stamires - Newport Beach CA, US
Paul O'Connor - Hoevelaken, NL
Gregory Pearson - Seabrook TX, US
William Jones - Cambridge, GB

Assignee:

Albemarle Netherlands B. V. - Amersfoort

International Classification:

B01J 23/00
B01J 21/02
B01J 27/14
C04B 35/10
C01F 7/02

US Classification:

502355, 502335, 502205, 502208, 502232, 502302, 502341, 502351, 50355, 423600, 423275, 423625, 423628, 423629, 501127

Abstract:

The present invention pertains to a quasi-crystalline boehmite containing additive in a homogeneously dispersed state. Suitable additives are compounds containing elements selected from the group of alkaline earth metals, alkaline metals, rare earth metals, transition metals, actinides, silicon, gallium, boron, titanium, and phosphorus. Said QCBs according to the invention may be prepared in several ways. In general, a quasi-crystalline boehmite precursor and an additive are converted to a quasi-crystalline boehmite containing the additive in a homogeneously dispersed state.

US Patent:

20030180214, Sep 25, 2003

Filed:

Jan 15, 2003

Appl. No.:

10/345011

Inventors:

Dennis Stamires - Newport Beach CA, US
Paul O'Connor - Hoevelaken, NL
Gregory Pearson - Seabrook TX, US
William Jones - Cambridge, GB

International Classification:

C01F007/02

US Classification:

423/625000

Abstract:

The present invention pertains to an improved process for the preparation of quasi-crystalline boehmite. In this improved process a quasi-crystalline boehmite precursor is aged at a pH below 7, prefereably under hydrothermal conditions. It was found that when conducting the preparation processes for quasi-crystalline aluminas described in the prior art at a pH below 7 and under hydrothermal conditions instead of the high pH and thermal aging used in the prior art, QCBs with higher crystallinity are obtained. In the process according to the invention additives may be added to the quasi-crystalline boehmite precursor. This results in a high quality QCB with additives in a homogeneously dispersed state. Suitable additives are compounds containing elements selected from the group of rare earth metals alkaline earth metals, transition metals, actinides, silicon, gallium, boron, and phosphorus.