SU119177A1 - The method of producing chromium hydroxide - Google Patents
The method of producing chromium hydroxideInfo
- Publication number
- SU119177A1 SU119177A1 SU603552A SU603552A SU119177A1 SU 119177 A1 SU119177 A1 SU 119177A1 SU 603552 A SU603552 A SU 603552A SU 603552 A SU603552 A SU 603552A SU 119177 A1 SU119177 A1 SU 119177A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- chromium hydroxide
- producing chromium
- cathode
- mercury
- reduction
- Prior art date
Links
Landscapes
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Description
Известен способ получени гидроокиси хрома восстановлением хроматов в щелочной среде.A known method for producing chromium hydroxide is the reduction of chromates in an alkaline medium.
Описываемый способ по сравнению с известным повышает степень чистоты продукта, удешевл ет его, а также упрошает процесс получени .In comparison with the known method, the described method increases the purity of the product, makes it cheaper, and also simplifies the preparation process.
В этих цел х восстановлепие осуществл ют в концентрированных растворах в диафрагменпых электролитических ваннах на твердом ртутпо-свинцовом катоде. Исходным продуктом дл получени гидроокиси хрома по насто щему изобретению служит концентрированный раствор хромата натри , который подвергают катодному восстановлению в диафрагменных электролитических ваннах на твердом ртутносвинцовом катоде, содержащем до 40% ртути. Материал катода характеризуетс высоким перенапр жением разр да водородных ионов. В качестве анода используют листовое железо.For these purposes, regeneration is carried out in concentrated solutions in diaphragm electrolytic baths on a solid mercury-lead cathode. The source product for the preparation of chromium hydroxide according to the present invention is a concentrated solution of sodium chromate, which is subjected to cathodic reduction in diaphragm electrolytic baths on solid mercury-lead cathode containing up to 40% mercury. The cathode material is characterized by high overvoltage of hydrogen ion discharge. Sheet iron is used as an anode.
Электролиз ведут при 50-80°, катодна и анодна плотности тока составл ют 10-100 а1дм.The electrolysis is carried out at 50-80 °, the cathode and anode current densities are 10-100 a1 dm.
Гидроокись хрома, полученна на поверхности твердого ртутносвинцового катода, отводитс вместе с католитом из прикатодного пространства , отфильтровываетс и промываетс водой. Католит, обогащенный при электролизе натриевой щелочью, после фильтрации может быть вновь использован дл получени хромата натри . Одновременно с образованием гидроокиси хрома в католите в анолите ванны происходит рост концентрации натриевого бихромата, содержание которого может быть доведено до насыщени .Chromium hydroxide, obtained on the surface of a solid mercury-lead cathode, is discharged with the catholyte from the cathode space, filtered and washed with water. The catholyte, enriched in sodium alkali electrolysis, after filtration can be reused to produce sodium chromate. Simultaneously with the formation of chromium hydroxide in the catholyte in the anolyte of the bath, an increase in the concentration of sodium bichromate occurs, the content of which can be brought to saturation.
Предмет изобретени Subject invention
Способ получени гидроокиси хрома восстановлением хроматов, отличающийс тем, что, с целью повышени степени чистоты продукта и его удешевлени , восстановление осушествл ют в концентрированных растворах в диафрагменных электролитических ваннах на твердом ртутно-свинцовом катоде.The method of producing chromium hydroxide by the reduction of chromates, characterized in that, in order to increase the purity of the product and reduce its cost, the reduction is carried out in concentrated solutions in diaphragm electrolytic baths on a solid lead-mercury cathode.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU603552A SU119177A1 (en) | 1958-07-07 | 1958-07-07 | The method of producing chromium hydroxide |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU603552A SU119177A1 (en) | 1958-07-07 | 1958-07-07 | The method of producing chromium hydroxide |
Publications (1)
Publication Number | Publication Date |
---|---|
SU119177A1 true SU119177A1 (en) | 1958-11-30 |
Family
ID=48391147
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU603552A SU119177A1 (en) | 1958-07-07 | 1958-07-07 | The method of producing chromium hydroxide |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU119177A1 (en) |
-
1958
- 1958-07-07 SU SU603552A patent/SU119177A1/en active
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