SU564257A1 - Method for producing oxygen - Google Patents

Description

one

The invention relates to a method for producing oxygen from hydrogen peroxide and can be used in electrochemical current generators.

It is known that hydrogen peroxide and its aqueous solutions decompose readily with the release of oxygen, and the production of oxygen. especially quickly in the presence of catalytically acting substances, naphimonor platinum metals, coal, alkali ij.

Also known is the production of oxygen by decomposition of hydrogen peroxide on a porous catalyst by heating. Oxides of various metals are used as catalysts and the process is carried out at 200 ° C 2.

The disadvantage of the method is a high residual content of hydrogen peroxide in the withdrawn solution (o, 1-0.5%), a high process temperature, reducing the service life of the catalysts and limiting their choice, as well as limitations imposed on the concentration of the initial solution of hydrogen peroxide.

The purpose of the invention is to increase the amount of hydrogen peroxide decomposed by one gram of catalyst, to remove restrictions on the concentration of the starting product and the oxygen output in the reactor.

To this end, concentrated hydrogen peroxide is injected into a continuously circulating stream of water to obtain a solution of hydrogen peroxide O, 1-J.1%, followed by pumping the resulting solution through a porous catalyst at 20-9 ° C, preferably at 30 to 30 ° C .

The proposed method allows to reduce the concentration of hydrogen peroxide in the solution from water to 0, O1%, increase the service life of the catalyst and, accordingly, n (increase the amount of decomposable hydrogen peroxide per 1 g of catalyst 34 times. In addition, the method allows to expand the range of catalysts and allows the use of the original hydrogen peroxide of any concentration.

Example. Hydrogen peroxide stock solution at a rate of 5 kg / hour is fed to a stream of water circulating at a rate of 30 kg / hour. The resulting hydrogen peroxide solution is pumped through the reactor core, the porosity of which is 7 O%, and the package thickness is -15 mm. The amount of catalyst in the porous range is 6 g. The results of this experiment are illustrated in Table. 1, Comparative characteristics of the proposed and known methods are illustrated in Table. 2. Table 1

95

and about

2O

Operating temperature, C

Permissible concentration of the initial 2 O

Oxygen yield, l / hr (obtained on 1 g of catalyst)

The concentration of H2O in the exhaust water,%

Amount (in terms of 1OO%), decomposed into 1 g of catalyst, kg Formula of the invention. Method of producing oxygen by decomposing hydrogen peroxide on porous J 60

O.OOZ

99

0,003

20

Table 2

52.0 Lyuba (in experiments with AOR;

four

82.7 0.5 0.01-0.02

4.6

26.0 catalyst when heated, about tl and h; i- Yushey with the fact that, for the purpose of the number of hydrogen peroxide. 1, so small per gram of catalyst, with restrictions on the concentration of the original product and increase the oxygen yield in the reactor, concentrated hydrogen peroxide is injected into a continuously circulating stream of water until a hydrogen peroxide solution of 0.1–11% is obtained, followed by pumping the resulting solution through a porous catalyst at 2–99 ° C, preferably at 30–6 ° C, 5642 57 into the pot in the examination of the invention: 1. Sedlis V. O. Chemical goods and building materials, Publishing House Kubuch, L., 1933, p. 37. 2. German Patent 2207281, 12 1 13/02, 23,08,73,