SU952303A1 - Method of purifying gas from chlorine - Google Patents

Description

(54) METHOD FOR CLEANING GAS FROM CHLORINE.

The invention relates to methods for the purification of gases from chlorine and can be used in the electrolytic production of chlorine and caustic.

Iizvest method of purification of gases from chlorine of small concentrations (up to 5%.% With the help of activated carbons of various grades 1 and (2.

The disadvantage of this method is the low dynamic capacity of the used coal, their great destructibility in the process of purification and regeneration, especially when cleaning highly concentrated gases.

The closest in technical essence and the achieved result is the method of purification of gases from chlorine by its adsorption with activated carbon brand SKT. When the chlorine concentration in the gas is up to 20 vol.% And more, the capacity of the SKT brand coal is 17–20 wt.%, And the protective time is 1-2 minutes 33.

However, SKT grade coal has a small dynsmic capacity.

as a result, the cleaning cycle is ma and often requires regeneration to be completed with HOJ-O sorbent.

In addition, during operation, a significant destruction of the sorbent occurs (up to 10% per cycle. All this leads to an increase in operating costs and increases the cost of

to purify gases from chlorine.

The purpose of the invention is to cleanse and cheapen the cleaning process.

15

This goal is achieved by the fact that according to the method of purification of gases from chlorine, as a carbon-containing material, an activated microporous anthracid with a micropore size of 0.8-1.2 is used.

The effectiveness of activated carbons as sorbents is determined by the porous structure. Table 1 presents the comparative characteristics of activated carbon SKT and activated anthracite.

The data show that activated anthracite is not inferior to activated CKT activated carbon with respect to porosity, but the proportion of micropores in the total porosity of activated anthracite is higher, due to 20 than the efficiency of chlorine extraction from gas using activated anthracite is higher

Air saturated with moisture and containing 6.5% by weight of chlorine at room temperature passes through columns with a diameter of 2P mm filled with activated anthracite and SKT brand activated carbon (bed height 200 mm) at a speed of 30 2 l / min . Transmission gazy implemented anthracite

Coal SCT

Before the occurrence of chlorine leakage in the purified gas, 1 mg / m.

By analyzing the sorbents, determine their dynamic capacity. The regeneration of the spent sorbents after the first and second cleaning cycles was carried out with water at 60 ° C, and after the third and fourth, by heating to. After the sorption-hiccide cycle, the sorbent was sieved into fractions and the breakability (chemical resistance) of the sorbents was determined. The concentration of chlorine in the gas, the reaction to purification, was maintained within the limits of S, i5 and 50% by volume. The results of the experiments are given in table 2.

Table 2

Claims (1)

Claim A method of purifying gas from chlorine by passing gas through a carbon-containing material with its subsequent regeneration, characterized in that, in order to intensify and reduce the cost of the process, activated microporous anthracite with a micropore size of 0.8-1.2 nm is used as a carbon-containing material.