SU627081A1 - Chlorine regeneration method - Google Patents

Description

The invention will be omitted to methods for producing chlorine, in particular, to regenerating chlorine from hypochlorite solutions, and can be used in titanium-magnesium sub-industry for decomposing hypochlorite solutions.

There is a method for the regeneration of chlorine from

GIL solution of calcium ohlorite by treating it with hydrochloric acid, followed by blowing off chlorine with the help of: air l.

This method does not allow the recovery of chlorine from the calcium chloride solution that is formed during the decomposition of the hypochlorite solution. The disadvantages of the method are also low concentration of PIE chlorine (52.2-52.6%) in the gas to be blown off.

The aim of the invention is to extract chlorine from a calcium chloride solution and to increase its concentration in the exhausted gas.

The goal is achieved by the method described, concluding that chlorine is regenerated from hypochlorite solutions by treating them with hydrochloric acid with

subsequent stripping of chlorine, chlorine gas with a chlorine content of 50-70%. As the chlorine-containing gas, you can use anode gas.

This method differs from the well-known one in that chlorine-containing gas with a chloropolymer content of 50-70% is used to remove chlorine, and iodine gas is used as chlorine-containing gas.

This allows you to completely remove the chlorine from the calcium chloride solution and increase its concentration in the gas to be blown out to 70-90%.

Primer p. Into the reactor, heated from the outside by a steam jacket, with a useful capacity of подают, 5 m is served — at a rate of 3.5 l / min; heated to a solution of calcium hypochlorite, resulting from the disposal of chlorine-containing gases with lime milk, of the following composition, g / l:

Calcium chlorate 20

Calcium chloride240

Calcium carbonate 22

Claims (2)

Calcium oxide 25.6 At the same time, 2O, 6-32% O hydrochloric acid (from chemical production wastes) are introduced into the reactor in the amount of 20% of stoichiometry. The temperature of the reaction mixture is kept constant {not lower than 95,100 s). For complete decomposition of the products, the reaction mixture is held for 15-20 min at constant stirring. To blow off chlorine, anode gas with a chlorine content of up to 70% is passed through the reaction mass at a rate of 0.7-1, O l / miv. The concentration of chlorine in the stripped gas is 70–9O%. Claims 1. A method for regenerating chlorine from hypochlorite solutions by treating them with hydrochloric acid followed by stripping chlorine, which is different in that in order to extract chlorine from calcium chloride solution and increase its concentration in; blown off gas, chlorine are blown off chlorine-containing mixtures of chlorine with a chlorine content of 5O-7O%. 2. A method according to claim 1, characterized in that, as an chlorine-containing gas, anodic gas is used. Sources of information taken into account during examination: 1. USSR Copyright Certificate No. 253779, cl. С О1 В 7 / О2, О7Д0.