Processes for the manufacturing of oxidation catalysts
First Claim
1. A process for manufacturing an oxidation catalyst comprising the steps of:
- a) mixing a support with an aqueous solution comprising at least one gold-containing compound to form a slurry,b) adding a base to the slurry to form an insoluble gold complex which deposits on the surface of the support thereby forming a gold-containing support,c) heating the gold-containing support,d) mixing the gold-containing support from step c) with an aqueous solution or a colloid comprising at least one platinum-containing compound to impregnate the gold-containing support with the platinum-containing compound,e) drying the resulting impregnated support from step d) at a temperature up to about 120°
C., andf) reducing platinum on the dried impregnated support from step e) at a temperature in the range of from about 200°
C. to about 600°
C. to produce the oxidation catalyst, wherein the oxidation catalyst comprises particles comprising gold and particles comprising platinum on the support, the molar ratio of platinum to gold of the catalyst is in the range of from about 100;
1 to about 1;
4, the platinum is substantially present on the support as Pt(0), and the particle sizes of the particles comprising platinum are substantially in the range of from about 2 to about 50 nanometer, and wherein the catalyst has the ability to catalyze oxidation of glucose to glucaric acid.
6 Assignments
0 Petitions
Accused Products
Abstract
Disclosed are catalysts comprised of platinum and gold. The catalysts are generally useful for the selective oxidation of compositions comprised of a primary alcohol group and at least one secondary alcohol group wherein at least the primary alcohol group is converted to a carboxyl group. More particularly, the catalysts are supported catalysts including particles comprising gold and particles comprising platinum, wherein the molar ratio of platinum to gold is in the range of about 100:1 to about 1:4, the platinum is essentially present as Pt(0) and the platinum-containing particles are of a size in the range of about 2 to about 50 nm. Also disclosed are methods for the oxidative chemocatalytic conversion of carbohydrates to carboxylic acids or derivatives thereof. Additionally, methods are disclosed for the selective oxidation of glucose to glucaric acid or derivatives thereof using catalysts comprising platinum and gold. Further, methods are disclosed for the production of such catalysts.
-
Citations
23 Claims
-
1. A process for manufacturing an oxidation catalyst comprising the steps of:
-
a) mixing a support with an aqueous solution comprising at least one gold-containing compound to form a slurry, b) adding a base to the slurry to form an insoluble gold complex which deposits on the surface of the support thereby forming a gold-containing support, c) heating the gold-containing support, d) mixing the gold-containing support from step c) with an aqueous solution or a colloid comprising at least one platinum-containing compound to impregnate the gold-containing support with the platinum-containing compound, e) drying the resulting impregnated support from step d) at a temperature up to about 120°
C., andf) reducing platinum on the dried impregnated support from step e) at a temperature in the range of from about 200°
C. to about 600°
C. to produce the oxidation catalyst, wherein the oxidation catalyst comprises particles comprising gold and particles comprising platinum on the support, the molar ratio of platinum to gold of the catalyst is in the range of from about 100;
1 to about 1;
4, the platinum is substantially present on the support as Pt(0), and the particle sizes of the particles comprising platinum are substantially in the range of from about 2 to about 50 nanometer, and wherein the catalyst has the ability to catalyze oxidation of glucose to glucaric acid. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
-
Specification