Drowning-out crystallization of sodium molybdate in aqueous-ethanol solutions
The drowning-out crystallization process of sodium molybdate (Na2MoO4) was studied in water-ethanol solutions at room temperature. Sodium molybdate was separated from the solution in well-crystalline particles using less water and energy compared with the industrial processes that use evaporative cr...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Association of the Chemical Engineers of Serbia
2020-01-01
|
| Series: | Chemical Industry and Chemical Engineering Quarterly |
| Subjects: | |
| Online Access: | http://www.doiserbia.nb.rs/img/doi/1451-9372/2020/1451-93722000017C.pdf |
| Summary: | The drowning-out crystallization process of sodium molybdate (Na2MoO4) was studied in water-ethanol solutions at room temperature. Sodium molybdate was separated from the solution in well-crystalline particles using less water and energy compared with the industrial processes that use evaporative crystallization. Results showed that crystallization of sodium molybdate di-hydrate was achieved after 20 or 40 min in one or two operating stages for super-saturation control with the addition of 25 or 50 vol.% ethanol, respectively. Crystallization with ethanol could reduce the operating costs for about 32% with respect to the conventional evaporative crystallization method, and the exhausted ethanol in the aqueous solution could be recovered by distillation and then recycled into the process. |
|---|---|
| ISSN: | 1451-9372 2217-7434 |