Method of maintaining adequate seed crystal in preferential precipitation systems
US4618429A · kind A · utility
18Cited by
1References
24Claims
0Family size
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Key dates
| Filing date | Dec 14, 1984 |
| Grant date | Oct 21, 1986 |
| Priority date | — |
| Expiry date | Dec 14, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02A20/131
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method for ensuring an adequate amount of seed crystal in solution concentration systems employing preferential precipitation to control scaling and fouling over relatively low concentration factors. In systems concentrating solutions at concentration factors between 1 and 2, the method comprises determining the minimum amount of seed crystal necessary for the solution being concentrated at a concentration factor of about 10 or greater and introducing into the feeds solution a percentage of this amount according to the equation, % introduced=25.times.(C.F.).times.(C.F..sub.MAX /C.F..sub.MAX -1).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.