PL9739B1 - Method for dechlorination of zinc oxides and other zinc raw materials intended for electrolysis. - Google Patents
Method for dechlorination of zinc oxides and other zinc raw materials intended for electrolysis. Download PDFInfo
- Publication number
- PL9739B1 PL9739B1 PL9739A PL973927A PL9739B1 PL 9739 B1 PL9739 B1 PL 9739B1 PL 9739 A PL9739 A PL 9739A PL 973927 A PL973927 A PL 973927A PL 9739 B1 PL9739 B1 PL 9739B1
- Authority
- PL
- Poland
- Prior art keywords
- zinc
- electrolysis
- dechlorination
- raw materials
- zinc oxides
- Prior art date
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- 235000014692 zinc oxide Nutrition 0.000 title claims description 7
- RNWHGQJWIACOKP-UHFFFAOYSA-N zinc;oxygen(2-) Chemical class [O-2].[Zn+2] RNWHGQJWIACOKP-UHFFFAOYSA-N 0.000 title claims description 6
- 238000000034 method Methods 0.000 title claims description 5
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 title claims description 4
- 238000005868 electrolysis reaction Methods 0.000 title claims description 4
- 229910052725 zinc Inorganic materials 0.000 title claims description 4
- 239000011701 zinc Substances 0.000 title claims description 4
- 238000006298 dechlorination reaction Methods 0.000 title claims description 3
- 239000002994 raw material Substances 0.000 title 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 7
- 239000000460 chlorine Substances 0.000 claims description 7
- 229910052801 chlorine Inorganic materials 0.000 claims description 7
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 6
- 235000011116 calcium hydroxide Nutrition 0.000 claims description 2
- 239000000920 calcium hydroxide Substances 0.000 claims description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims 1
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 239000011734 sodium Substances 0.000 claims 1
- 229910052708 sodium Inorganic materials 0.000 claims 1
- 238000002386 leaching Methods 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 229910021653 sulphate ion Inorganic materials 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- FMRLDPWIRHBCCC-UHFFFAOYSA-L Zinc carbonate Chemical compound [Zn+2].[O-]C([O-])=O FMRLDPWIRHBCCC-UHFFFAOYSA-L 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 235000004416 zinc carbonate Nutrition 0.000 description 1
- 239000011667 zinc carbonate Substances 0.000 description 1
- 229910000010 zinc carbonate Inorganic materials 0.000 description 1
- UGZADUVQMDAIAO-UHFFFAOYSA-L zinc hydroxide Chemical compound [OH-].[OH-].[Zn+2] UGZADUVQMDAIAO-UHFFFAOYSA-L 0.000 description 1
- 229940007718 zinc hydroxide Drugs 0.000 description 1
- 229910021511 zinc hydroxide Inorganic materials 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 description 1
- 229960001763 zinc sulfate Drugs 0.000 description 1
- 229910000368 zinc sulfate Inorganic materials 0.000 description 1
Description
Przewazna ilosc tlenków cynkowych zawiera chlor w takich ilosciach, ze przy wylugowaniu kwasem siarkowym roztwór zawiera kilka setek miligramów chloru, co stanowi przy nastepujacej elektrolizie ilosc, powodujaca szybkie niszczenie anod. Wy¬ mywanie chloru z tlenku cynkowego woda jest przewaznie niemozliwe z tego powo¬ du, ze tlenki cynku zawieraja zbyt wielkie ilosci siarczanu cynku, które ginelyby przy wymywaniu. Niniejszy sposób polega na dodawaniu sody, przyczem siarczan prze¬ chodzi w nierozpuszczalny weglan cynku, lub tez na dodawaniu mleka wapiennego, przyczem siarczan zamienia sie w nieroz¬ puszczalny wodorotlenek cynkowy. W ten sposób udaje sie o tyle zredukowac zawar¬ tosc chloru, ze przy wylugowywaniu kwa¬ sem siarkowym powstaje elektrolit, zawie¬ rajacy chlor w nieszkodliwych ilosciach, np. okolo 50 mg na litr.Dotychczasowy sposób odchlorowywa¬ nia polegal na tern, ze tlenek cynkowy byl wypalany przy temperaturze, przy której wielkie ilosci cynku ulatnialy sie i straty w metalu byly tak znaczne, ze sposób nie oplacal sie pod wzgledem gospodar¬ czym. PLThe majority of zinc oxides contain chlorine in such amounts that on leaching with sulfuric acid the solution contains several hundred milligrams of chlorine, which is the amount with the subsequent electrolysis that causes the anodes to deteriorate rapidly. The leaching of chlorine from the zinc oxide with water is generally not possible because the zinc oxides contain too much zinc sulfate which would die on washing. The present method consists in adding soda whereby the sulphate is converted into insoluble zinc carbonate, or in the addition of milk of lime whereby the sulphate is converted into insoluble zinc hydroxide. In this way, it is possible to reduce the chlorine content so much that an electrolyte is formed during the leaching with sulfuric acid, which contains chlorine in harmless amounts, for example about 50 mg per liter. The previous method of dechlorination was based on the fact that the oxide was The zinc was fired at a temperature at which great amounts of zinc evaporated and the loss of metal was so significant that the process was economically unprofitable. PL
Claims (1)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| PL9739B1 true PL9739B1 (en) | 1929-01-31 |
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