SU72292A1 - Method for separating hydroazobenzene from zinc oxide - Google Patents
Method for separating hydroazobenzene from zinc oxideInfo
- Publication number
- SU72292A1 SU72292A1 SU127-43A SU320336A SU72292A1 SU 72292 A1 SU72292 A1 SU 72292A1 SU 320336 A SU320336 A SU 320336A SU 72292 A1 SU72292 A1 SU 72292A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- hydroazobenzene
- separating
- zinc oxide
- zinc
- flotation
- Prior art date
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Реакционна смесь, получаема в процессах производства бензидина при восстановлении нитробензола металлическим цинком, состоит из гидроокиси цинка и гидроазобензола.The reaction mixture obtained in the production of benzidine in the reduction of nitrobenzene with metallic zinc consists of zinc hydroxide and hydroazobenzene.
Практикуемые методы разделени гидроазобензола от гидроокиси цинка основаны на растворении одного из компонентов - гидроокиси цинка - серной кислотой. Последующее отделение гндроазобензола из раствора производитс на фильтр-прессе.The practiced methods for separating hydroazobenzene from zinc hydroxide are based on the dissolution of one of the components, zinc hydroxide, with sulfuric acid. The subsequent separation of gdroazobenzene from the solution is performed on a filter press.
Дл более полного отделени гидроазобензола от гидроокиси цинка производитс разделение этих компонентов по методу флотации.For a more complete separation of hydroazobenzene from zinc hydroxide, the separation of these components is carried out according to the flotation method.
По предлагаемому способу реакционную смесь, отжатую на фильтр-прессе или центрифуге до содержани влаги пор дка , отмывают водой до нейтральной реакции по фенолфталеину, после чего подвергают флотации на флотационной машине. При этом гидроазобепзол уходит в концентрат, а окись цинка - в хвосты.In the method according to the invention, the reaction mixture, pressed on a filter press or centrifuge to a moisture content of the order, is washed with water until neutral with phenolphthalein, and then subjected to flotation on a flotation machine. In this case, hydroazobepzol goes into concentrate, and zinc oxide into tails.
Дл более полного удалени компонентов добавл ют Лчидкое стекло или фосфат натри в количестве до 0,1о/о от веса смеси.For a more complete removal of the components, a glass of liquid or sodium phosphate is added in an amount of up to 0.1o / o by weight of the mixture.
Предмет изобретени Subject invention
Способ отделени гидроазобензола от окиси цинка в производстве бензидина, отличающийс тем, что процесс осуществл ют применением метода флотации.A process for separating hydroazobenzene from zinc oxide in the production of benzidine, characterized in that the process is carried out using a flotation method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU127-43A SU72292A1 (en) | 1943-02-03 | 1943-02-03 | Method for separating hydroazobenzene from zinc oxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU127-43A SU72292A1 (en) | 1943-02-03 | 1943-02-03 | Method for separating hydroazobenzene from zinc oxide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU72292A1 true SU72292A1 (en) | 1947-11-30 |
Family
ID=52669780
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU127-43A SU72292A1 (en) | 1943-02-03 | 1943-02-03 | Method for separating hydroazobenzene from zinc oxide |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU72292A1 (en) |
-
1943
- 1943-02-03 SU SU127-43A patent/SU72292A1/en active
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