Separation of an aqueous solution by the improved vacuum...

Details Separation of an aqueous solution by the improved vacuum... Separation of an aqueous solution by the improved vacuum...

B - Operations, Transporting

01

D

23/338, 23/404

B01D 9/04 (2006.01) C02F 1/22 (2006.01) C02F 11/20 (2006.01)

Patent

CA 1136383

Abstract of the Disclosure In the Improved Vacuum-Freezing High Pressure Ice Melting Process, an aqueous solution is flash vaporized under a reduced pressure to simultaneously form a low pressure water vapor and ice crystals. The ice formed is first purified in a counter-washer and then molted inside Or heat conductive conduits under a high pressure (e.g. 600 atm.) and the low pressure water vapor is desublimed to form desublimed (ice) on the outside of the conduits. The latent heat of desublimation released is utilized in supplying the heat needed in the ice-melting operation the disability is removed intermittently by an in-situ dissolution operation utilizing an aqueous solution such as the feed solution or the concentrate, about an equivalent amount of ice is formed inside of the conduits by an exchange freezing operation. The ice so formed is also melted by the high pressure ice melting operation described.

345211

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