PL3671B1 - Method of obtaining metal connections. - Google Patents

Description

The last conversion, however, also took place without the addition of acid. The following numerical example may serve as an explanation of the procedure: 80 kg of sodium fluoride and 100 kg of calcium carbonate are mixed in 350 liters of water for several hours until complete conversion. After the reaction is complete, the insoluble calcium fluoride is separated from the sodium carbonate solution and washed with water. The rinse and the wash water give, after evaporation and caicination of the precipitate, 100 kg of sodium carbonate. The calcium fluoride is converted to sodium silicofluoride with 120 kg of kitchen salt in a solution slightly acidified with hydrochloric acid, while warm, using the recycle of the silicon fluoride returned, which is passed directly into the acidified hydrochloric acid solution. Sodium silicon fluoride is decomposed by heating into sodium fluoride and silicon fluoride, and both return to the circulation. The shorter route of using silicon fluoride does not require decomposition and then the silicon fluoride reacts directly with the metal combination, e.g. Na2 Si F6 + Ca CO 3 = Na2 CO 3 + Ca Si F6.Ca Si F6 + H2 SO ± = Ca SO, + H2 SiFQ. An example of this procedure is: 80 kg of zinc oxide is treated with 432 kg ^^^ of this silicon hydrofluoric acid, which is then treated with 117 kg table salt. 188 kg of Na2 Si FQ and 424 kg of an approximately 32% solution of zinc chloride with 172 kg of Zn Cl2 are produced. 2H20. 188 kg of Na2 Si FQ with heat splitting 350 liters of water leads to 78 kg of fluorine spar and about 450 kg of a 25% sodium solution from which it can be extracted by evaporation and crystallization. To form some metal salts The acids that are difficult to separate out can also be a metal silofluoride that is added to the acid or the salt of the acid which forms an insoluble bond with the metal previously bonded with hydrofluoric acid. Again, hydrofluoric acid is recovered directly from the salt. The example explains the equation: PbO + H2 Si F6 = Pb Si FQ + H20 3 Pb Si F6 + 2 H3 As 04 = Pb3 (As OJ2 + 3 H2 Si F6. This circular waveform with hydrofluoric acid can also be used for recovery barium peroxide from barium phosphate, which falls off when retaining hydrogen peroxide. Accordingly, barium phosphate decomposes when reacting with hydrosilicophyllate, free phosphoric acid and barium silifluoride. The siliofluoride is split by heating, e.g. and silicon fluoride. Bank fluoride can be converted with alkaline earth hydroxide into calcium fluoride and barium hydroxide. From the latter, it is possible to obtain barium peroxide by heating in a known manner. The alkaline earth fluoride, on the other hand, is formed with the previously released fluoride silicic acid in the presence of acid, according to the previously drunk step, the silicofluoric acid needed at the beginning of this process. This process is as follows: Ba (H2 POJ2 + H2 Si F6 = Ba Si F6 + 2H3 PO, Ba Si F6 + heatb = Ba F2 + Si F, Ba F2 + Cdi (OH) 2 = Ba (OH) 2 + Ca F2. Ba (OH) 2 + O + heat = BaO2 + H2O Ca F2 + Si F4 + H2 SO4 = H2 Si F6 + CaSO4. The given circular process can be shortened by transforming barium silofluoride, barium fluoride with with a nitrate of a metal which forms a soluble fluoride, e.g. with calcium nitrate. The barium nitrate thus formed is converted into barium oxide by heating, and the nitric acid vapor can be recovered again. The rest of the process is as described above. The following equations are therefore sufficient for the explanation: Ba F2 + Ca (NO3) 2 = Ba (NOJ2 + Ca F2 Ba (NOJ2 = Ba O + N2 0 ^ Ba O + O = Ba 02. This invention also covers the use of other In addition to the previously used hydrofluoric acid for the treatment of hydrofluoric acid, these acids are intentionally obtained in this process from components using susceptible methods. For example, zinc oxide is converted with boron fluoride and hydrofluoride or in place of of boric acid anhydride, fluorine spar and acid. Potassium is obtained by a complex fluorine connection, e.g. potassium boroflunre, as follows: The latter is split by heat into potassium fluoride and boron fluoride. Potassium fluoride transforms transforms into insoluble calcium fluoride and potassium with an insoluble carbonate, e.g. . The resulting csaid drips off and then rinses out the wastes. The boron fluoride formed by the decomposition of potassium borofluoride is converted back into petasic borofluoride by the addition of hydrochloric acid, which at the same time contains the calcium fluoride formed in the process described above, and a sufficient amount of potassium chloride. PL

Claims (12)

Claims 1. A method for obtaining metal joints, characterized by the fact that metals or metal rienidi, carbonates and compounds are treated with cricimofluoriccidbric acid, the resulting metal silicon fluoride. it is transformed from the salt to be introduced into the acid, it separates the metal link from the discharged silica fluoride and recovers from the melted acid. 2. Implementation of the method according to claim A process as claimed in claim 1, characterized in that the decaying silicic fluoride is transformed with a sulfuric acid to form hydrofluoronic acidb. 3. Implementing the method according to claim The method of claim 1, characterized in that the decaying silicon-anorak and the decaying by heating to silicon fluoride and silicon fluoride, the phthalide is melted with carbonate, an oxide or an equivalent substance, but the silicon fluoride combines with fluoride and acid to form a dihydrogenic acid. 4. Implementation of the method according to claim 1, characterized by the fact that the discharged silicon phosphide is split by heating into fluoride and silicon fluoride, the fluoride is transformed with carbonate, hib oxide is an equal substance, and the silicon fluoride is transformed into the original silicon fluoride with the newly formed fluoride and the salt may be To be introduced metal, without Mb in the presence of a flower. 5. Implementation of the method according to claims According to claims 1, 3 and 4, characterized by the fact that any silicon fluoride is released and transforms directly with carbonate, oxide or an equivalent substance, then the silicon fluoride which drops off next to the metal salt is converted back into silico-hydrofluoric acid. 6. Implementation of the method according to ziaJstrz. 1 and 3 to 5 characterized in that the alkali salts are broken down with silicofluorohydric acid into alkali silicoflucre and acid; the resulting alkaline silicon fluoride splits by force into alkali fluoride and silicon fluoride, with alkali fluoride combined with alkaline earth oxide - 4 - or alkaline earth carbonate, an oxide or carbonate is formed, on the other hand, a steep residue after extraction of the alkali oxide or carbonate earth fluoride alkaline!] along with the released silicon fluoride is carried out in the presence of; acid to silico-hydrofluoric acid, 7. Implementation of the method as per Annex 1 and 3 to 6, characterized by the fact that the alkali silicofluoride is split into alkali fluoride and silicon fluoride, then from the alkali fluoride with alkali earth oxide or carbonate alkali oxide or carbonate, on the other hand, remaining after the extraction of the oxide alkaline earth or carbonate alkaline earth fluoride together with the released silicon fluoride and alkali salts are converted back in the presence of acid to silicon fluoride. 8. Carrying out the method according to claim 6 and 7, characterized by the fact that the conversion between metal fluoride and alkaline earth salt is carried out with a small amount of water in a concentrated solution, or by using carbonic anhydride under pressure. 9. Implementation of the method according to claim 1, characterized by converting decomposable waste barium salt, such as barium phosphate, to the production of barium peroxide with hydrofluoric acid, separating phosphoric acid, and decomposing the lost barium silifluoride into fluoride barium fluoride and silicon fluoride are then formed from barium fluoride with alkaline earth hydroxide, calcium fluoride and barium hydroxide, and from this by heating in the presence of oxygen barium peroxide, while silicon fluoride is formed with the evaporating alkaline earth fluoride in The presence of acid serves to recover silicofluoric acid. 10. Carrying out the method according to claim According to claims 1 and 9, characterized by the fact that barium fluoride is converted with the nitrates of metals that form sparingly soluble fluorides into barium nitrate, this is converted by heating into an oxide as also barium peroxide, and the discharged fluoride serves again to recover the acid silicofluoride, 11. Performing the method according to claim and, characterized by the fact that the metal silofluoride is treated with an acid or acid salt which forms an insoluble bond with the metal, previously with hydrofluoric acid bonded, while the silicofluoric acid is recovered directly or from its salt and returned to the metal. circulation. 12. Implementing the method according to claim According to any one of claims 1 to 11, it is significant that instead of silicofluoric acid, complex hydrofluoric acids or their components are used. Fritz Meyerhofer. Deputy: M, Kryzan, patent attorney. Printed by L. Boguslawski, Warsaw; PL