# US 10,371,681 B2 · Systems and methods for generation of hydrogen peroxide vapor

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- Number: US 10,371,681 B2
- Document ID: US10371681B2
- Status: Granted
- Kind: B2
- Application number: 14/557,350
- Filed: 2014-12-01
- Published: 2015-03-19
- Granted: 2019-08-06
- Earliest claimed: 2007-11-15
- Assignees: Lawrence Livermore National Security, LLC
- Applicants: Lawrence Livermore National Security, LLC
- Inventors: Adam H. Love; Joel Del Eckels; Alex K. Vu; Armando Alcaraz; John G. Reynolds
- Web page: https://patentgrep.com/patent/US10371681B2

## CPC

- G01N 33/007: {Arrangements to check the analyser (calibrating gas analysers G01N33/0006)}
- C01B 15/01: Hydrogen peroxide
- C01B 15/013: Separation; Purification; Concentration
- F17D 1/005: {for a two-phase gas-liquid flow}
- G01N 33/0072: {by generating a test gas}
- Y10T 137/0318: Processes
- G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q)
- C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C}
- F17D: PIPE-LINE SYSTEMS; PIPE-LINES (pumps or compressors F04; fluid dynamics F15D; valves or the like F16K; pipes, laying pipes, supports, joints, branches, repairing, work on the entire line, accessories F16L; steam traps or the like F16T; fluid-pressure electric cables H01B9/06)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A method according one embodiment includes at least one of bubbling dried air through a hydrogen peroxide solution in a container for producing a first hydrogen peroxide vapor, and passing dried air from the moisture trap into a headspace above the hydrogen peroxide solution in a container for producing a second hydrogen peroxide vapor. Additional systems and methods are also presented.

## Claims

### Claim 1

A method, comprising:
bubbling dried air from a moisture trap through a hydrogen peroxide solution in a first container for producing a first hydrogen peroxide vapor, wherein the hydrogen peroxide solution comprises water, aqueous hydrogen peroxide, a solute and a mixing agent;
passing dried air from the moisture trap into a headspace above a hydrogen peroxide solution in a second container for producing a second hydrogen peroxide vapor;
alternately directing, using a switching valve, the dried air through the hydrogen peroxide solution to generate the first hydrogen peroxide vapor and through the headspace above the hydrogen peroxide solution to generate the second hydrogen peroxide vapor;
creating a pressure differential between the moisture trap and the container for causing the dried air to pass from the moisture trap to the container; and
wherein the dried air is an artificial mix of gases, and has a volumetric flow rate of greater than 0.5 liters per minute and less than one liter per minute;
wherein the hydrogen peroxide solution in the container is not exposed to atmospheric gases;
wherein the hydrogen peroxide vapor exiting the container has a hydrogen peroxide concentration from 100 ppm to 1000 ppm;
wherein the moisture trap comprises a condenser;
wherein the container, the moisture trap, and all other surfaces and/or equipment to which the hydrogen peroxide solution and the hydrogen peroxide vapor are exposed comprise one or more nonreactive materials selected from the group consisting of: polytetrafluoroethylene (PTFE), acrylonitrile butadiene (ABS) plastic, ethylene propylene diene terpolymer (EPDM), polyvinyl chloride (PVC), nylon, polyethylene (PE), silicone, and carbon steel;
wherein the first hydrogen peroxide vapor is characterized by a higher concentration of hydrogen peroxide than the second hydrogen peroxide vapor; and
wherein an absolute humidity of the dried air passed from the moisture trap is less than 1 gram of water per cubic meter of the air.