AT28157B

AT28157B - Process for the extraction of iodine from alkalis containing iodine.

Info

Publication number: AT28157B
Authority: AT
Inventors: Ernest Herrmann
Original assignee: Ernest Herrmann
Priority date: 1906-04-13
Filing date: 1906-04-13
Publication date: 1907-04-25

Description

  

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Man kann auch das Jod aus dem Vaselinöl durch direkte Erhitzung gewinnen oder durch Duchleiten von warmer Luft oder eines indifferenten Gases. 



   Die Benutzung des   VaselinÖles besitzt nachstehende   Vorteile : Es verdunstet nicht und entzündet sich nicht, wie Benzin, Petroleum u. dgl. ; es   schwimmt   an der Oberfläche, wodurch man mehr oder   weniger unreine Langen benützen   kann,   während   dies mit Lösungsmitteln, die ein höheres spezifisches Gewicht als Wasser haben, wie beispielsweise Schwefelkohlenstoff, Chloroform, Tetrachlorkohlenstoff u. dgl. ohne Waschung und darauffolgende Behandlung nicht möglich ist. Das Vaselinöl destilliert erst bei etwa 345  C, so dass man zum Abtreiben des Jods Wasserdampf benützen kann, da das Öl unterhalb seines Siedepunktes keinen Dampf abgibt.

   Schliesslich ist auch die chemische Gruppe der Paraffine, zu welcher es gehört, gar nicht reaktionsfähig und es wird nicht durch die Luft oxydiert, so dass es ohne weiteres immer wieder von neuem benützt werden kann.



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The iodine can also be obtained from the vaseline oil by direct heating or by passing warm air or an inert gas through it.



   The use of Vaseline Oil has the following advantages: It does not evaporate and does not ignite, like petrol, kerosene and the like. like.; it floats on the surface, so you can use more or less impure lengths, while this is done with solvents that have a higher specific gravity than water, such as carbon disulfide, chloroform, carbon tetrachloride and the like. Like. Without washing and subsequent treatment is not possible. The petroleum jelly does not distill until around 345 C, so that steam can be used to drive off the iodine, as the oil does not give off any steam below its boiling point.

   Finally, the chemical group of paraffins to which it belongs is not reactive at all and it is not oxidized by the air, so that it can easily be used again and again.

Claims

If you want to free the iodine from the vaseline oil more quickly in order to have a smaller amount of vaseline oil required for the entire operation, you can extract the iodine from the vase of linseed oil by stirring with a liquid that combines with iodine. For example, by adding a potassium hydrate or sodium hydrate solution, death from the petroleum jelly can be bound very quickly, but clarifying the solution takes a fairly long time. A solution of sodium sulfite also binds the iodine quickly and it is cleared up very quickly. One proceeds in the same way that one uses iodized vaseline oil for 600 parts! takes about 1000 parts of an aqueous sulfite solution, so that sulfite is present in excess.

The mixture is then stirred until the color from the iodine disappears. The vaseline is then left to clear. peel it off and replace it with an equal amount of iodized petroleum jelly. One can in this way with the same amount of saline liquid that one has, if necessary. adding sulfite from time to time, treat 15-20 servings of iodized petroleum jelly. whereby a lye is obtained which is very rich in iodides.

The iodine contained in these concentrated alkalis is released by known means, such as nitrites or chlorates, and carried away by steam, according to the method already described above for iodized petroleum jelly or you can collect the iodine after it has been precipitated by clarifying the alkalis.

PATENT CLAIMS: 1. A method for the extraction of iodine from iodine-containing alkalis, characterized. that the iodine, liberated from iodine eyes by known means, is shaken out with vaseline oil, in which it dissolves and from which it is then released.

2. The method according to claim 1, characterized in that the iodine is expelled from vaseline oil containing iodine by means of steam.

3. The method according to claim 1, characterized in that the iodine-containing VaseHnö) is shaken with a liquid containing a substance that binds with iodine, for the purpose of repeatedly shaking out this solution with iodine-containing Vaseline oil to obtain concentrated iodine lye, from which the iodine is converted in a known manner EMI2.1