DE303233C - - Google Patents

Description

■ There are already procedures for extraction of sulfur become known, in which the action of aqueous solutions of Sulfur dioxide is converted to hydrogen sulfide. This results in not inconsiderable Amounts of polythionic acids which reduce the yield of sulfur; aside from that but it is also difficult to work with such large quantities of liquid in large companies, as happens with the known methods of this type. Also the divorces Sulfur often occurs in a form in which it is difficult to separate from the liquid can be. One has already looked for means, the formation of polythionic acids to reduce and the deposition of the sulfur in an easily separable Promote shape; but on the one hand the yield was still "poor, on the other hand the need for a very extensive apparatus remained in order to cope with the considerable Process quantities of liquid and a loss of gaseous sulfur compounds to avoid.

Compared to the known method, the present method differs in that the two sulfur-containing gases are directed towards each other in a reaction tower so that the action takes place within the contact layer, and also in that water-containing mists are introduced into the reaction layer, partly around the To maintain a favorable temperature for the sulfur separation, partly also to pass the separated sulfur on using the smallest possible amount of liquid. This creates an uninterrupted process for the deposition of sulfur, in which one only has to take care of regulating the supply of the fog-like water into the reaction layer. The procedure is as follows:. } ■ '. '' ■

Sulfur dioxide is introduced into a tower-shaped reaction space, namely is expediently first the entire reaction space is filled with sulfur dioxide with displacement the air. Then ini lower parts using suitable distribution devices known _ type of hydrogen sulfide introduced and at the same time A Water vapor or water mist. The feed . the hydrogen sulfide is regulated so that only in the lower part of the tower-shaped Reaction space takes place by the opposite from above Sulfur dioxide, heavier than hydrogen sulfide, was introduced in copious amounts will. The mixture of water and finely divided sulfur is left out of the reaction space drain from the ground and add suitable salts as required which the sulfur is obtained in a granular form that is easier to separate from the water.

In order to achieve with greater certainty that the implementation in the lower part of the Reaction space takes place, the upper space is placed in chambers lying one on top of the other.

(similar edition, issued on April 10th etc.) ■

divided, suitably interconnected and fitted with pipe inserts or panels are provided "which prevent the hydrogen sulfide from rising. the Sulfur dioxide vapors come from above step down through these chambers until they reach the reaction chamber.

Water mist or flowing water can also come from above with the sulfur dioxide

ίο water to be introduced in order to constantly have a ' To achieve flushing of the chambers. Chambered reaction spaces, as they can be used for this purpose, are known (e.g. the so-called Kubierschky column,

t5 German patent specification 194567). The connection the individual parts of the chambers with each other is expediently so that the Resignation of gases is inhibited by pipe inserts. The lowermost chamber expediently contains a valve-like acting one Tube insert on the side of the access device for the hydrogen sulfide in one open at the top shaft of the lower room can open, thereby already the possibility to reduce the transfer of hydrogen sulfide into the chambers.

With the water mist, it is also possible to use the atomized water in the reaction chamber Salt solutions are introduced, but only in the lower, non-chambered part of the same, so that the more dense sulfur excretion only takes place here or on the ground. Would already in the chambers the reaction between the gases and a touch enter with the salt solutions, blockages would easily become there Malfunctions occur.

The reaction can be conducted without difficulty so that only proportionally little steam or water mist and only relatively little salt required using an atomized saline solution is to obtain the sulfur in an easily recoverable, granular form, so that under certain circumstances for saline recovery, ζ. B. when using calcium chloride, Magnesium chloride, etc. can be dispensed with.

If it is a question of producing very pure sulfur in this way, then it is it only required hydrogen sulphide and sulphurous acid through suitable washing equipment to conduct before they meet in the reaction chamber.

The process can best be carried out in connection with the sulfuric acid production, in which sulfur dioxide is produced on a large scale. To obtain the Hydrogen sulphide is useful as a residue in Leblanc soda production recovered calcium sulphide or other sulphidic industrial residues.

Claims (3)

Patent Proverbs :, 1. Process for the production of sulfur by the action of sulfurous acid gas on hydrogen sulfide gas in the presence of water, characterized in that the sulfur-containing Gases from opposite sides, namely the sulphurous acid gas from above and the hydrogen sulphide gas from below, in are introduced into the reaction space with simultaneous supply of fine distributed water (mist or steam) to the contact and reaction layer. 2. Embodiment of the method protected by claim ι characterized through the use of a tower-like reaction space, the upper part of which, through which the sulfur dioxide is fed, in one above the other, below is divided by pipes connected chambers, which prevent undecomposed hydrogen sulfide gas from rising. 3. Embodiment of the method protected by claims ι and 2, consisting of the introduction of salt solutions distributed in the form of a mist, into the contact and reaction layer.