Electrodialytic method of growing water-soluble ionic crystal
US4670117A · kind A · utility
2Cited by
4References
3Claims
0Family size
Assignee
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Key dates
| Filing date | Feb 11, 1986 |
| Grant date | Jun 2, 1987 |
| Priority date | — |
| Expiry date | Feb 11, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2311/10
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A solution of material for the desired crystal is filled in a growth tank having two ion-exchange membranes which define a crystal growth vessel between them and two side vessels on opposite sides of the crystal growth vessel, and the growth tank is placed in an outer tank while filling a fluid therebetween. During electrodialysis in the growth tank, the crystal growth vessel solution temperature T.sub.c, the side vessel solution temperature T.sub.o, and the fluid temperature T.sub.w between the tanks are controlled so as to keep the conditions of T.sub.o >T.sub.c >T.sub.w.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.