Patent ID: 6217771
Filing Date: 2001-04-17
Classification: B01J,C10G

Abstract:
A method for removing corrosive carboxylic acid contaminants from a polar extraction solvent or water mixture thereof containing less than about 5 LV % water comprising:adding water to the solvent or water mixture thereof in the volume ratio of water to solvent or water mixture in the range of about 20:1 to about 1:1 whereby a solvent and water mixture containing greater than 5 LV % water is obtained;contacting the mixture containing greater than 5 LV % water with a basic ion exchange resin to remove the contaminants, whereby the exchange capacity of the resin for carboxylic acids in the mixture containing greater than 5 LV % water is increased over that in the absence of water addition; and,thereafter recovering the solvent.