Polymer-encapsulated ion-exchange resin
View Patent ↗Polymer-encapsulated ion-exchange resins are disclosed. The resins are useful in adsorption, catalysis, and other applications. Catalysts comprising a polymer-encapsulated combination of an ion-exchange resin and a transition metal are also disclosed. The catalysts are useful in hydrogenation, oxidation, hydroformylation, polymerization, and other valuable processes. Certain of the polymer-encapsulated catalysts enhance the productivity in the process for producing hydrogen peroxide from hydrogen and oxygen.
1. A catalyst comprising a polymer-encapsulated combination of a transition metal and a sulfonic acid polystyrene resin.
2. The catalyst of claim 1 wherein the transition metal is selected from the group consisting of rhenium, iron, ruthenium, cobalt, rhodium, iridium, nickel, palladium, platinum, silver, gold, and mixtures thereof.
3. The catalyst of claim 1 wherein the transition metal is selected from the group consisting of rhenium, palladium, platinum, silver, gold, and mixtures thereof.
4. The catalyst of claim 1 wherein the transition metal is palladium.
5. The catalyst of claim 1 wherein the polymer is selected from the group consisting of polystyrenics, polyolefins, and mixtures thereof.
6. The catalyst of claim 1 wherein the polymer is polystyrene.
7. A process for producing hydrogen peroxide, which comprises reacting hydrogen and oxygen in a solvent in the presence of the catalyst of claim 1 .
8. The process of claim 7 wherein the transition metal is selected from the group consisting of rhenium, palladium, platinum, silver, gold, and mixtures thereof.
9. The process of claim 7 wherein the transition metal is palladium.
10. The process of claim 7 wherein the polymer is selected from the group consisting of polystyrenics, polyolefins, and mixtures thereof.
11. The process of claim 7 wherein the catalyst further comprises a support component.
12. The process of claim 7 wherein the solvent is selected from the group consisting of alcohols, ethers, esters, ketones, carbon dioxide, water, and mixtures thereof.
13. The process of claim 7 wherein the reaction is performed in the presence of a hydrogen peroxide stabilizer.