Acid water and process for its preparation

Abstract

Acid water containing negative charge oxygen atoms and showing an acidity level higher than pH 5 is provided. Acid water of a pH level not lower than pH 5 is prepared by conveying negative charge oxygen atoms produced by heating a composite oxide enclosing active oxygen by themselves or by means of gas not reacting with water and contacting them with water.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

The invention will be described with reference to the accompanying drawings, wherein like numbers reference like elements.

FIG. 1 is a schematic illustration of a process for preparation of acid water according to the present invention; and

FIG. 2 is a graph illustrating some of the results of measuring acid water according to the present invention by means of an electron-spin resonance spectrometer.

Claims

1. Acid water containing negative charge oxygen atoms and showing an acidity level higher than pH 5.

2. Acid water according to claim 1, wherein it contains only oxygen atoms, negative charge oxygen atoms and hydrogen atoms as component substances.

3. Sterilizing water containing negative charge oxygen atoms and showing an acidity level higher than pH 5.

4. An aqueous solution containing negative charge oxygen atoms and dissolving silicon nitride film to show an acidity level higher than pH 5.

5. A process for the preparation of acid water of a pH level not lower than pH 5 by conveying negative charge oxygen atoms produced by heating a composite oxide enclosing active oxygen by themselves or by means of gas not reacting with water and contacting them with water.