The main industrial method – passing a powerful electrical spark discharge through oxygen or air. Synthesis, more specifically the electrosynthesis occurs in the "ozone generators". This method is based on the ability of oxygen molecules to break into atoms under the influence of the energy of electrical discharge. Atomic oxygen, in turn, immediately unites with a molecule of oxygen, into ozone. Accordingly, the ozone reacting with oxygen atoms, is transformed into molecular oxygen. Thus, the reactions of formation and decay of ozone almost in equilibrium, and therefore the output ozone as a reaction product does not exceed 5-7%.
Much more concentrated ozone (from 30 to 60%) can be obtained by electrolytic method, for example, by electrolysis oxychloride acid, but it is fraught with great difficulties. Suffice it to say that the temperature of the electrodes, and electrolyte temperature should be from -56 to -65 degrees. In such elektroliza, the decomposition of ions and radicals by the scheme:
H2O + O2 = O3 +2H+ +2e-.
In laboratory practice, a small amount of ozone is extracted by photochemical method, under the influence of direct solar radiation. These oils give a very low yield of ozone (about 0.1% of "working" with air, and 1% - pure oxygen), but is simple in construction and compact.