Process for the purification of water
US4053368A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 21, 1976 |
| Grant date | Oct 11, 1977 |
| Priority date | — |
| Expiry date | May 21, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S203/18
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process for the purification of water comprises a step-wise procedure for heating and evaporating water to be purified at different location and then condensing water thus evaporated. The water is heated in the form of a sheet by solar energy while in a pan at least part of the bottom of which is capable of absorbing the heat content of solar radiation, and in which it is covered by a layer of liquid which transmits solar radiation therethrough, is immiscible with water and which has a vapor pressure less than that of water. The liquid is usually an oil. Various mechanical devices are disclosed for optimizing utilization of solar radiation reaching the pan. Evaporation of heated water removed from the sheet of water to the evaporator is preferably effected under reduced pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.