PL1629B1 - A method of producing chromium alunium from ferrochrome. - Google Patents
A method of producing chromium alunium from ferrochrome. Download PDFInfo
- Publication number
- PL1629B1 PL1629B1 PL1629A PL162922A PL1629B1 PL 1629 B1 PL1629 B1 PL 1629B1 PL 1629 A PL1629 A PL 1629A PL 162922 A PL162922 A PL 162922A PL 1629 B1 PL1629 B1 PL 1629B1
- Authority
- PL
- Poland
- Prior art keywords
- ferrochrome
- chromium
- solution
- hydroxide
- iron
- Prior art date
Links
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 title claims description 9
- 229910052804 chromium Inorganic materials 0.000 title claims description 9
- 239000011651 chromium Substances 0.000 title claims description 9
- 238000000034 method Methods 0.000 title claims description 9
- 229910000604 Ferrochrome Inorganic materials 0.000 title claims description 8
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 15
- VQWFNAGFNGABOH-UHFFFAOYSA-K chromium(iii) hydroxide Chemical compound [OH-].[OH-].[OH-].[Cr+3] VQWFNAGFNGABOH-UHFFFAOYSA-K 0.000 claims description 9
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 8
- 229940037003 alum Drugs 0.000 claims description 8
- OTYBMLCTZGSZBG-UHFFFAOYSA-L potassium sulfate Chemical compound [K+].[K+].[O-]S([O-])(=O)=O OTYBMLCTZGSZBG-UHFFFAOYSA-L 0.000 claims description 5
- 229910052939 potassium sulfate Inorganic materials 0.000 claims description 5
- 235000011151 potassium sulphates Nutrition 0.000 claims description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- 239000003513 alkali Substances 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 3
- 229910001854 alkali hydroxide Inorganic materials 0.000 claims description 2
- 150000008044 alkali metal hydroxides Chemical class 0.000 claims description 2
- 150000004649 carbonic acid derivatives Chemical class 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims 1
- NCNCGGDMXMBVIA-UHFFFAOYSA-L iron(ii) hydroxide Chemical compound [OH-].[OH-].[Fe+2] NCNCGGDMXMBVIA-UHFFFAOYSA-L 0.000 description 5
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 3
- 235000014413 iron hydroxide Nutrition 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 239000005569 Iron sulphate Substances 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 2
- 229910021506 iron(II) hydroxide Inorganic materials 0.000 description 2
- 239000001120 potassium sulphate Substances 0.000 description 2
- 238000009835 boiling Methods 0.000 description 1
- 229940055042 chromic sulfate Drugs 0.000 description 1
- GRWVQDDAKZFPFI-UHFFFAOYSA-H chromium(III) sulfate Chemical compound [Cr+3].[Cr+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O GRWVQDDAKZFPFI-UHFFFAOYSA-H 0.000 description 1
- 229910000356 chromium(III) sulfate Inorganic materials 0.000 description 1
- 235000015217 chromium(III) sulphate Nutrition 0.000 description 1
- 239000011696 chromium(III) sulphate Substances 0.000 description 1
- 235000003891 ferrous sulphate Nutrition 0.000 description 1
- 239000011790 ferrous sulphate Substances 0.000 description 1
- FBAFATDZDUQKNH-UHFFFAOYSA-M iron chloride Chemical compound [Cl-].[Fe] FBAFATDZDUQKNH-UHFFFAOYSA-M 0.000 description 1
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 description 1
- 229910000360 iron(III) sulfate Inorganic materials 0.000 description 1
- 238000010409 ironing Methods 0.000 description 1
- 229910021653 sulphate ion Inorganic materials 0.000 description 1
Description
Jak wiadomo, rozpuszcza sie ferrochrom w kwasie siarczanym lub kwasie solnym, a z rozczynu siarczanu chromowego i siar¬ czanu zelazowego mozna przez dodanie siarczanu potasu wytwarzac alun chromo¬ wy. Dotychczas nalezalo celem otrzyma¬ nia alunu chromowego, mozliwie wolnego od zelaza, doprowadzic powazna czesc siarczanu zelazowego do wykrystalizowa¬ nia. Przebieg ten byl dlugotrwaly i nie do¬ prowadzal do zupelnie pewnych wyników.Alun chromowy, otrzymany przez bezpo¬ srednie dodanie siarczanu potasowego do rozczynu, jest wobec tego do celów tech¬ nicznych wlasciwie niedostatecznie wolny od zelaza.Niniejszy sposób wytwarzania alunu chromowego z ferrochromu polega na tern, ze z rozczynu ferrochromu w kwasie siar¬ czanym lub solnym straca sie przez doda¬ nie srodków stracajacych wodorotlenek chromowy, w ilosci, któraby stracila tylko wodorotlenek chromowy a nie wodorotle¬ nek zelaza, wodorotlenek chromowy, stra¬ cony i oddzielony od macierzystego lugu, rozpuszcza sie w kwasie siarczanym, po¬ czern miesza z siarczanem potasu.Sposób polega na spostrzezeniu, ze z rozczynu wodorotlenku chromowego i wo¬ dorotlenku zelazawego naprzód zostaje stracony wodorotlenek chromowy i dopie¬ ro po oddzieleniu tegoz rozpoczyna sie stra-canie wodorotlenku zelazawego. Opisanym sposobem udaje sie osiagnac dostatecznie zupelne stracenie wodorotlenku chromowe¬ go bez oddzielenia wodorotlenku zelaza¬ wego i otrzymanie alunu chromowego, wol¬ nego od zelaza, z wodorotlenku chromo¬ wego.Oddzielenie siarczanu zelazawego przez skrystalizowanie, konieczne w bezposre¬ dnim sposobie wytwarzania alunu chromo¬ wego z rozczynów ferrochromu i kwasu siarczanego, zostaje sposobem niniejszym usuniete zupelnie, wobec tego sposób ni¬ niejszy jest krótszy niz znane dotad, gdyz krystalizacja siarczanu tlenku zelazawego wymaga dluzszego czasu. Jako srodek stracajacy stosuje sie wodorotlenki alka- ljów lub alkaljów ziemnych lub weglany alkaliczne.Przyklad. 100 kg ferrochromu rozpu¬ szcza sie w okolo 300 kg skoncentrowanego kwasu siarczanego lub w okolo 500 kg skon¬ centrowanego kwasu solnego w odpowie¬ dnich naczyniach i otrzymany lug straca wodnistym rozczynem sody, z zawartoscia okolo 200 kg sody przez gotowanie w gora¬ cym stanie. Zamiast rozczynu sody mozna z tym samym skutkiem zastosowac równozna¬ czna ilosc alkaljów ziemnych. Stracany wo¬ dorotlenek chromowy, który moze zawierac tylko male ilosci wodorotlenku zelazawe¬ go, zostaje po odprasowaniu i dobrem wy- plókaniu rozpuszczony w odpowiedniej ilo¬ sci kwasu siarczanego. Po dodaniu równo¬ znacznej ilosci siarczanu potasu z rozczynu zwykla droga krystalizuje alun chromowy.Z rozczynów siarczanu zelaza mozna zwy¬ kla droga otrzymac siarczan lub chlorek zelaza. PLAs is known, ferrochrome is dissolved in sulfuric acid or hydrochloric acid, and chromic alum can be produced from the solution of chromic sulfate and ferric sulfate by adding potassium sulfate. Until now, it has been necessary to obtain chromium alum, possibly iron-free, to cause a large part of the iron sulphate to crystallize out. This process was lengthy and did not lead to absolutely certain results. The chromium alum, obtained by direct addition of potassium sulphate to the leachate, is therefore technically insufficiently free of iron. The present method of producing chromium alum from ferrochrome consists of to the point that the ferrochrome solution in sulfuric or hydrochloric acid is lost by adding agents that lose chromium hydroxide, in an amount that would lose only the chromium hydroxide and not the iron hydroxide, the chromium hydroxide, lost and separated from the parent The lye is dissolved in sulfuric acid, and the black is mixed with potassium sulfate. The method consists in observing that from the solution of chromic hydroxide and iron hydroxide, chromium hydroxide is first lost, and only after separation of this, the loss of ferrous hydroxide begins . The described method succeeds in achieving a sufficiently complete loss of the chromium hydroxide without separating the iron hydroxide and obtaining the iron-free chromium alum from the chromium hydroxide. The separation of ferrous sulphate by crystallization is necessary in the direct method of producing chromium alum. Of the ferrochrome and sulfuric acid solutions are completely removed by the process, so that the process is shorter than that known before, since the crystallization of ferrous oxide sulfate requires a longer time. Alkaline or earth alkali hydroxides or alkaline carbonates are used as the losing agent. Example. 100 kg of ferrochrome is dissolved in about 300 kg of concentrated sulfuric acid or about 500 kg of concentrated hydrochloric acid in suitable vessels, and the resulting slug is lost with a watery solution of soda, containing about 200 kg of soda, by boiling it in a hot state. . Instead of a soda solution, an equivalent amount of earth alkali may be used with the same effect. The lost chromium hydroxide, which may contain only small amounts of ferrous hydroxide, is dissolved in a suitable amount of sulfuric acid after ironing out and good rinsing. On the addition of an equal amount of potassium sulphate from the solution, chromium alum crystallizes in a conventional way. From the iron sulphate solutions it is usually possible to obtain sulphate or iron chloride. PL
Claims (1)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| PL1629B1 true PL1629B1 (en) | 1925-03-31 |
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