In hydrate-based desalination or other water purification conducted using naturally buoyant or trapped-gas-assisted buoyancy hydrate in a hydrate fractionation column, a portion of fresh or purified product water is extracted from an upper, hydrate dissociation region of the fractionation column and reintroduced into a lower portion of the fractionation column at a point above but generally near a product water/saline water interface. The difference in density between the reintroduced product water and the fluid in the hydrate fractionation column above the point of reintroduction (water, hydrate, and gas) drives a natural circulation system which enhances the rate at which hydrate rises into the hydrate dissociation region.

 
Web www.patentalert.com

< Solid-acid isomerization catalyst and process

< Method for cleaning crude terephthalic acid and catalysts suitable for the same and containing carbon fibers

> Living and quasiliving cationic telechelic polymers quenched by N-substituted pyrrole and methods for their preparation

> Process for the isomerization of an olefin

~ 00223