Method of preventing scale from being deposited in case of producing fresh water from sea water
US3932224A · kind A · utility
9Cited by
3References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 16, 1974 |
| Grant date | Jan 13, 1976 |
| Priority date | — |
| Expiry date | Dec 16, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S203/18
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A method of preventing scale from being deposited in case of producing fresh water from sea water by heating the sea water in a vapour pressure type evaporator and multiple stage flush evaporator and by condensing water vapour evolved to obtain the fresh water comprising adding to the sea water small amount of seed crystal selected from the group consisting of calcium carbonate and magnesium hydroxide together with a surface active agent selected from the group consisting of a nonionic active agent and cation surface active agent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.