| 摘要 |
A reverse osmosis module in which the semipermeable membrane maybe utilized to concentrate or dewater aqueous solutions at elevated temperatures and pressures. The module comprises a microporous support reinforced on one side with a backing material and on the other side is deposited an ultra-thin film, formed by cross-linking polyethyleneimine with a cross-linking agent such as sophthaloyl chloride. The backing for the membrane sandwich comprises a film of a polyethyleneterephthalate which is positioned between two layers of an epoxy-impregnated polyester. The module may be used at temperatures ranging from about 50 DEG to about 95 DEG C and pressures ranging from 400 to about 1200 psi to dewater aqueous sugar solutions, salt solutions, starch solutions, etc. |
