Preparation of hydrogen peroxide

Claim 2

A process for producing hydrogen peroxide which comprises reacting hydrogen and oxygen in an acidic aqueous solution containing suspended therein a supported Group VIII noble metal catalyst in a system wherein the reaction medium has a thickness of at most about 2 millimeters.

Claim 3

A process as defined in claim 1, wherein the Group VIII noble metal is palladium.

Claim 4

A process as defined in claim 1, wherein the support is selected from the group consisting of activated carbon and silica.

Claim 5

The process of claim 2 wherein said palladium is 2-5 wt. % of said support.

Claim 6

The process of claim 1 wherein the concentraction of said supported catalysts is 0.01-1 wt. % of said solution.

Claim 7

The process of claim 1 wherein said solution contains substantially no organic component.

Claim 8

The process of claim 1 wherein said process is carried out at a pressure of 500-2000 psig and a temperature of 0°-30° C.

Claim 9

The process of claim 1 wherein the molar ratio of oxygen to hydrogen is from 3/1 to 0.5/1.

Claim 10

The process of claim 1 wherein the concentration of hydrogen ion in said mixture is 0.1-1 molar.

Claim 11

The process of claim 1 wherein the hydrogen and oxygen are substantially free of carbon monoxide.

Claim 12

A process for producing hydrogen peroxide which comprises reacting substantially carbon monoxide-free hydrogen and oxygen in a substantially organic component-free aqueous solution having a 0.1-1 molar concentration of hydrogen ion, said solution containing suspended therein 0.01-1 wt. % of a supported catalyst containing 2-5 wt. % palladium, said reaction being carried out at a pressure of 500-2000 psig, a temperature of 0°-30° C., and a molar ratio of O 2 /H 2 of 3/1 to 0.5/1 and where the liquid reaction medium has a thickness of at most about 2 millimeters.

Claim 13

A process for producing hydrogen peroxide which comprises reacting substantially carbon monoxide-free hydrogen and oxygen in a substantially organic component-free aqueous solution having a 0.1-1 molar concentration of hydrogen ion, said solution containing suspended therein 0.01-1 wt. % of a supported catalyst containing 2-5 wt. % palladium, said reaction being carried out at a pressure of 500-2000 psig, a temperature of 0°-30° C., and a molar ratio of O 2 /H 2 of 3/1 to 0.5/1 and where the liquid reaction medium has a thickness of at most about 2 millimeters.