SU808108A1 - Solution for cleaning gas from sulfur dioxide - Google Patents

Description

one

The invention relates to the purification of gas from sulfur dioxide and can be used in the chemical industry.

Lime solution U l gas purification from sulfur dioxide, containing ferric sulfate, s-sulfuric acid and water in the following ratio of components, wt.% Fei (, 7-1,7

M ,, 09-2,3

H.J.O.C.

A disadvantage of the known solution is the low volumetric gas cleaning rate (400).

The purpose of the invention is to increase the volumetric gas cleaning rate.

This goal is achieved by the fact that the solution for purifying gas from sulfur dioxide based on iron salts additionally contains osmium tetroxide, and as an iron salt is hexacyanoferrate (111) potassium when following the ratio of components, wt.%:

3.6-6.0

K, fFe (cr) 0,013-0,026

0s 04

n7, o the rest

The proposed purification solution in comparison with the known region gives an increased activity and works at volumetric speeds of 800,950 hours. The gas purification reaction from sulfur dioxide proceeds in an environment whose pH is 8, which eliminates the strong corrosive effect of the solution on the apparatus. The catalyst activity does not decrease after regeneration by air blowing with

0 volumetric speed 60 h

The preparation of the solution is carried out by dissolving the reagents in water to the required concentration at room temperature.

five

The examples illustrate the proposed solution.

Example 1. A solution containing, wt.%: (Ct) J 3,2;

0 0.0 0.0013 and NdO, the rest up to 100% i is placed in a shaken gas flow vessel. Gas containing 0.01 vol.% Sulfur dioxide, is passed at a rate of 800 hL at this

5, a 100% degree of gas purification from SO is achieved. The sulfuric acid is oxidized to sulfuric.

The data of the experiments in examples 2 and 3, similar to example 1, are given in the table. 10.6

1.8

3.2 0.0013 Ostal- 0.01

4.6 0.0019 Ostal-0.01

6.0 0.0026 Ostal- 0.01

100

The rest is 0.01

400

new to

100%

800

1) 0 to 100%

100

850

up to

100%

100

900 up to 100%

It follows from the table that the use of potassium hexacyanoferrate (III) with the addition of osmium tetroxide allows an increase in the rate of gas purification from sulfur dioxide by 2–2.5 times.

invention formula

A solution for purifying gas from sulfur dioxide based on iron salts, characterized in that.

With integer increases in the space velocity of purification, the solution additionally contains osmium tetroxide, and as an iron salt, hexacyanoferrite (| I) potassium in the following ratio of components, wt.%:

KjfFe. {C 3,6-6,0

0,0013-0,0026

Rest

Sources of information taken into account in the examination

1. Patent of Great Britain No. 132141, CL-C 1 A 1973.

Claims (1)

Claim A solution for cleaning gas from sulfur dioxide based on iron salts, characterized in that, in order to increase the volumetric rate of purification, the solution additionally contains osmium tetroxide, and potassium hexacyanoferrate (| H) as the iron salt in the following ratio of components, weight.%: ₃₀ K ₃ fr- _e (C ^)] 3.6-6.0 ⁴⁰ 0 ₆ о ₄ 0.0013-0.0026 H ^ 0 Else