DE260141C - - Google Patents

Description

PATENT GIFT

CLASS 12 /. "GROUP

Patented in the German Empire on August 7, 1912.

The leaching of magnesium chloride from potassium salts by alcohol is known per se (Pfeiffer, Handbuch der Kaliindustrie, p. 255). Even in the analysis of potash salts, Al-; alcohol for leaching chloromagnesite; used. But so far it has not been possible to use this leaching process on a large scale; because the losses of alcohol became too great as a result of: the alcohol remaining in the after; Leaching remaining salt residue and as a result of the formation of so-called crystal alcohols (Mg CZ ₂ + x alcohol). . : ■ '.;

The present invention now aims to! Alcohol leaching by using the continuously acting ones that have become known in the potash industry in recent years; To make countercurrent leaching apparatus with stage division usable for large-scale operations; and to reduce the alcohol losses so far that the use of the alcoholic leaching of magnesium chloride in large-scale operations is made possible. _: ■:

For this purpose, three should be continuously: working dissolving apparatus with graduation to; »5 a cooperating whole kombi-i be ned. J j

The potassium salt containing chloromagnesium passes through these three devices one after the other. ,

In each of these solvents appliances now a so-called. Cycle takes place, ie a process in which the once-used liquid recovered repeatedly reinserted in the respective dissolution apparatus and is used for that process.

.. ■ In the first dissolving apparatus a _x , the potassium salt containing chloromagnesium is freed from chloromagnesium by means of alcohol, expediently at normal temperature. The salt enters at b, the alcohol at C. According to the principle of countercurrent flow, the magnesium chloride is now gradually leached out by the alcohol. The saturated solution drains through d , taking the sludge of the potassium salt with it. From d the alcoholic solution passes to suitable stills e, where the alcohol is distilled off, while the chlorine; Magnesium remains in a solid state with the sludge and possibly migrates into the shaft as a mountain backfill. The recovered alcohol re-enters the dissolving apparatus Ci ₁ at c.

The rest of the potassium salt, to which some alcohol still adheres, is lifted in any way over the watertight partition f to the dissolving apparatus a ₂ , where it encounters a chlorine magnesium lye which is so concentrated that it does not dissolve potassium chloride, rock salt and ki eserite. This chloromagnesium liquor enters the dissolving apparatus a ₂ at g , is charged gradually in countercurrent, expediently at normal temperature, with the alcohol that adhered to the potassium salt residue, and, laden with the alcohol, leaves the apparatus at h to also migrate to the still e. The magnesium chloride solution must bring enough water into the distillation process to avoid the formation of the body _{MgCl 2} + χ alcohol and the formation of the body

Mg Cl ₂ + x H ₂ O ge during the distillation ^:. is guaranteed. So this lye plays a very important role.

After the alcohol has been driven off at e , this lye moves back to g in order to serve its purpose anew.

The potassium salt residue, which has now been freed from magnesium chlorine and alcohol, is then transferred through the watertight partition i into the:

ιό first division of a ₃ in any way ^! , lifted. Here in the dissolving machine i? ₃ the potassium chlorine in the heat by a dissolving lye 'of suitable composition, which always. is used again. The ransom eye; occurs at k, the saturated hot solution occurs \ from at /. This solution needs clarification: not because it is completely sludge-free as a result of the previous leaching processes. Clarifying; ' boxes, filter presses, etc. are therefore covered by this one;

ao process away. The residue is ejected at ni \. Of course you can also treat artificial carnallite in the manner described. The three dissolving devices can; They can of course also be switched next to one another or two in a row and one next to one another:

will. j

By applying the described;

Procedure is the application of alcohol; for the extraction and elimination of the chlorine, magnesium of the potassium salts in solid form; possible because of the loss of alcohol on one

■ Minimum can be reduced. ί

The use of alcohol for the stated purpose now has sequelae ' of the utmost importance. Quite apart from the fact that everyone in the chlorinated potassium factory Facilities for the extraction and processing of artificial carnallite and sewage treatment plants for the potassium chloride solution and filter presses completely eliminated, which brings about a significant reduction in investment and operating costs is, as a result of this procedure, there is now an exchange of goods between two major German industries. The distillery industry was also up to now Buyer of potash fertilizer salts for the fertilization of potatoes, but the potash industry granted no equivalent. But now there is a lively exchange of goods between them two major industries take place. The more alcohol is consumed, the greater it becomes the sale of potash salts for potato fertilization, and vice versa, the greater the potash production, the more alcohol is consumed.

The greatest advantage of the present process is, however, that the coal treasures Germany no longer for the unproductive process of evaporation and Elimination of final liquors is wasted, but that this work is now done by the heat of the sun will be done.

Claims (1)

Patent claim: Procedure for the elimination of the potash ., ·, - "salts existing chlorine magnesium in solid form by leaching with alcohol ; fetch, characterized in that the potassium salt containing chloromagnesium is used of three continuously acting '■ -, - countercurrent dissolving apparatus with graduation in three consecutive and combined cycle processes is processed, in the first of which the mechanically agitated potash salt is cold or warm alcohol (methyl, ethyl, . Propyl, butyl, amyl and homologues), which is won and used again and again, is encountered, in the second one if necessary reused chlorine magnesium lye to absorb the adhering ■ Alcohol of such a concentration is added to the rest of the potassium salt that it does not dissolve potassium chlorine, rock salt and kieserite, but which nevertheless contains so much water that during the distillation of all the alcohol the formation of so-called crystal alcohol (Mg-CZ ₂ + x Alcohol) is avoided and the formation of Mg Cl ₂ + χ H ₂ O is ensured, in the third of which chlorine storage is triggered from the rest of the potassium salt by a recurring solution of suitable composition. In addition 1 blue drawings.