Removal of dissolved disodium terephthalate from aqueous solution also containing sodium hydroxide

摘要

This invention relates to the removal of substantially all of the disodium terephthalate (Na2TA) dissolved in a dilute aqueous solution of sodium hydroxide. More particularly this invention pertains to the recovery for reuse of an aqueous solution containing 5 weight percent sodium hydroxide from an aqueous solution containing, on a weight basis, from 5 to 5.25 percent Na2TA and 2.5 to 3.0 percent sodium hydroxide.