US 5,705,040 A · Process for preparing a substantially pure aqueous solution of hydrogen peroxide

Abstract

A process for preparing a substantially pure aqueous solution of hydrogen peroxide is described. An impure hydrogen peroxide solution is vaporized in a vaporizer to form a vapor containing hydrogen peroxide and a concentrated hydrogen peroxide solution in equilibrium therewith. The solution also contains impurities. A substantially pure hydrogen peroxide solution is obtained by a partially condensing the vapor containing hydrogen peroxide. In addition to the solution, a residual vapor, in equilibrium with the solution and having a lower hydrogen peroxide concentration, can be condensed in a separate condenser. The concentration of the hydrogen peroxide solution obtained by the process can be regulated, for example, by regulating the condensation efficiency of the partial condensation.

Claims20

Dependent claims

A process for preparing a substantially pure aqueous solution of hydrogen peroxide, comprising:

vaporizing an aqueous solution containing hydrogen peroxide to form a vapor containing hydrogen peroxide and a liquid phase containing hydrogen peroxide and impurities;
separating the vapor from the liquid phase and leaving nonvolatile impurities in the liquid phase;
and
partially condensing the vapor to divide it into a condensate and a residual vapor in equilibrium with the condensate, thereby obtaining the condensate as the product of the process, the condensate being substantially pure and having a higher hydrogen peroxide concentration than the residual vapor.

1 more element

Dependencies are inferred from the claim text.

Process for preparing a substantially pure aqueous solution of hydrogen peroxide

Life of this patent

Process for preparing a substantially pure aqueous solution of hydrogen peroxide

Life of this patent

Abstract

Claims20