Method of utilizing solar ponds for effecting controlled temperature changes of solutions particularly in processes involving the dissolution and/or precipitation of salts
A method of changing the salt content of a solution is described by including the salt in a nonconvective solar pond heated by solar radiation and having stable salt-concentration and temperature gradients increasing from the top to the bottom of the pond, the bottom layer of the pond being a substantially saturated solution at a predetermined temperature. A feed solution containing the salt is introduced directly into the bottom layer and is circulated through the bottom layer. The predetermined temperature of the bottom layer is different from the initial temperature of the feed solution when introduced into the pond bottom layer and is selected to effect a change in solubility, and thereby a change in the salt content, of the feed solution by causing salt in the feed solution to be precipitated therefrom, or additional salt to be dissolved therein. Examples are described in which the solar pond is used for the production of sodium sulphate, dehydration of other salts, upgrading of carnalite, production of potassium chloride, and production of various minerals from the Dead Sea.
- Assignee:
- Solmat Systems Ltd (Israel)
- Patent Number(s):
- US 4333736
- OSTI ID:
- 6464198
- Country of Publication:
- United States
- Language:
- English
Similar Records
Floating solar pond
Salt-gradient solar ponds: design, construction and power production
Related Subjects
141000* -- Solar Collectors & Concentrators
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
CARNALLITE
CHLORIDES
CHLORINE COMPOUNDS
CONTROL
DEAD SEA
DISPERSIONS
DISSOLUTION
EQUIPMENT
HALIDE MINERALS
HALIDES
HALOGEN COMPOUNDS
LAKES
MAGNESIUM CHLORIDES
MAGNESIUM COMPOUNDS
MINERALS
MIXTURES
OXYGEN COMPOUNDS
PONDS
POTASSIUM CHLORIDES
POTASSIUM COMPOUNDS
PRECIPITATION
PRODUCTION
RADIATIONS
SEPARATION PROCESSES
SODIUM COMPOUNDS
SODIUM SULFATES
SOLAR COLLECTORS
SOLAR EQUIPMENT
SOLAR PONDS
SOLAR RADIATION
SOLUTIONS
STELLAR RADIATION
SULFATES
SULFUR COMPOUNDS
SURFACE WATERS
TEMPERATURE CONTROL