SU583098A1 - Method of preparing chromous hydroxide - Google Patents
Method of preparing chromous hydroxideInfo
- Publication number
- SU583098A1 SU583098A1 SU7502122009A SU2122009A SU583098A1 SU 583098 A1 SU583098 A1 SU 583098A1 SU 7502122009 A SU7502122009 A SU 7502122009A SU 2122009 A SU2122009 A SU 2122009A SU 583098 A1 SU583098 A1 SU 583098A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- chromium
- hydroxide
- sodium
- alkaline solution
- chromous
- Prior art date
Links
Landscapes
- Inorganic Compounds Of Heavy Metals (AREA)
Description
1one
Изобретение относитс к области пЪлучени хромовых соединений - сырь дл выпплавки технического хрома силикотермией.The invention relates to the field of emission of chromium compounds, a raw material for melting technical chromium by silicothermia.
Известен способ получени гидроокиси хрома путем восстановлени хромата натри 5 водородом в присутствии куприта натри l. Недостатками его вл ютс необходимость ведени процесса при высоком давлении в реакционном пространстве ( л 30 атм); загр знение гидроокиси хрома меаыо, кото- ю ра , вл сьНежелательной примесью, при выплавке хрома целиком переходит в сплав.A known method for producing chromium hydroxide by reducing sodium chromate 5 with hydrogen in the presence of sodium cuprite is l. Its disadvantages are the necessity of conducting the process at high pressure in the reaction space (l 30 atm); Contamination of chromium hydroxide, which is an undesirable impurity, during the smelting of chromium is completely converted into an alloy.
Известен также способ получени гидроокиси хрома, включающий восстановление 15 хромата натри серой, отделение фильтрацией гидроокиси хрома от щелочного раствора тиосульфата натри и последующую промывку гидроокиси 2.There is also known a method for producing chromium hydroxide, which includes the reduction of sodium chromate 15 by sulfur, the separation of chromium hydroxide by filtration from an alkaline solution of sodium thiosulfate and the subsequent washing of hydroxide 2.
Однако содержание воды в такой гидро- 20 окиси весьма высоко ( 6О %), что делает невозможным ее использование при выплавке силикохрома и силикотермического хрома.However, the content of water in such hydro-oxide is very high (6O%), which makes it impossible to use it in the smelting of silicon-chrome and silicone-thermal chromium.
Целью изобретени вл етс получение продукта, пригоднотО цп использовани в 25The aim of the invention is to obtain a product suitable for use in 25
качестве сырь при выплавке силикохрома и силикотермическэт о хрома.as raw material in the smelting of silicochrome and silicothermiccat chromium.
Поставленна пель. достигаетс предлагаемым способом получени гидроокиси хрома, включаквдим восстановление хромата натри серой, отделение гидроокиси хрома от щелочного раствора тиосульфата натри и сушку ее при температуре 2ОО25О°С .Put pell. This is achieved by the proposed method for the preparation of chromium hydroxide, including the reduction of sodium chromate with sulfur, the separation of chromium hydroxide from an alkaline solution of sodium thiosulfate and its drying at a temperature of 2OO25O ° C.
Отличительным признаком способа вл етс сушка./отделенной от щелэчного раствора тиосульфата натри гидроокиси хрома ; при температуре 20О-25О с.A distinctive feature of the method is drying. / Chromium hydroxide separated from the alkaline solution of sodium thiosulfate; at a temperature of 20 ° -25 ° C.
Пример. 1ОО в.ч. пасты гидроокиси хрома, полученной в результате восстановлени хромата натри серой при 102 С и отделенной от щелочного раствора тиосульфата натри , содержащей 33,4% Ог ji Оз, a MdaSjOi , 4%NQ ОН, 0,02% FeO, остальное воца, просущили при температуре После сушки получено 44,4 в.ч продукта, содержащего 71,8% Сг2 4,3 %Na2S20.j; 8,5%МйОН; 0,04% FeO; 1,2% в.р. С Оз и используемого при выплавке хрома силикстврмией .Example. 1OO v.ch. chromium hydroxide paste obtained by reducing sodium chromate with sulfur at 102 ° C and separated from alkaline sodium thiosulfate solution containing 33.4% Og ji Oz, a MdaSjOi, 4% OH NQ, 0.02% FeO, After drying, 44.4 hp of product was obtained, containing 71.8% Cr2 and 4.3% Na2S20.j; 8.5% MION; 0.04% FeO; 1.2% ip With oz and used in the smelting of chromium silicometry.
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3434
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU7502122009A SU583098A1 (en) | 1975-04-07 | 1975-04-07 | Method of preparing chromous hydroxide |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU7502122009A SU583098A1 (en) | 1975-04-07 | 1975-04-07 | Method of preparing chromous hydroxide |
Publications (1)
Publication Number | Publication Date |
---|---|
SU583098A1 true SU583098A1 (en) | 1977-12-05 |
Family
ID=20615464
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU7502122009A SU583098A1 (en) | 1975-04-07 | 1975-04-07 | Method of preparing chromous hydroxide |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU583098A1 (en) |
-
1975
- 1975-04-07 SU SU7502122009A patent/SU583098A1/en active
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