IP Library › Patent Application 12372467
Patent Application
App. No. 12/372,467

MODIFIED CATALYST SUPPORTS

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Patent No.
US None
App. No.
12/372,467
Abstract

A modified catalyst support exhibiting attrition resistance and/or deaggregation resistance is provided. A catalyst composition including the modified catalyst support is also provided. A process to produce a modified catalyst support including treatment of a support slurry with a solution of monosilicic acid is provided. A process to use a catalyst including the modified catalyst support in a Fischer-Tropsch synthesis is provided.

Claims (14)

1 . A method of treating a catalyst support, comprising the step of:

contacting a support material with an attrition-suppressing composition comprising monosilicic acid thereby to provide a treated catalyst support.

2 . The method according to claim 1 wherein the treated catalyst support has a surface concentration of between about 0.1 and about 10.60 Si atoms/nm 2 .

3 . The method according to claim 1 , wherein the attrition-suppressing composition comprises between about 0.02% and about 6.9% by weight of Si.

4 . The method according to claim 1 wherein the attrition-suppressing composition comprises between about 0.2% and about 6.9% by weight of Si.

5 . The method according to claim 1 wherein the support material is preformed.

6 . The method of claim 1 wherein the attrition-suppressing composition is prepared by contacting the monosilicic acid with water under acidic conditions.

7 . The method according to claim 1 wherein the monosilicic acid is prepared by contacting tetraethoxysilane with water under acidic conditions.

8 . The method according to claim 1 wherein the monosilicic acid is the predominant silicic acid species in the attrition-suppressing composition.

9 . The method according to claim 1 wherein the attrition-suppressing composition is prepared by contacting a silicate with water under acidic conditions.

10 . The method according to claim 9 wherein the silicate is sodium orthosilicate or sodium metasilicate and the pH ranges from about 1.5 to about 3.5 at a temperature ranging from about 0° C. to about 5° C.

11 . The method according to claim 1 wherein the attrition-suppressing composition is added to the catalyst support at a temperature ranging from about 0° C. to about 95° C.

12 . The method according to claim 1 wherein the attrition-suppressing composition is added to the catalyst support at a temperature ranging from about 0° C. to about 10° C.

13 . The method according to claim 1 wherein the attrition-suppressing composition comprises a polysilicic acid species wherein concentration of monosilicic acid is greater than the concentration of trisilicic acid and higher polymers of silicic acid.