Patent ID: 7514588
Filing Date: 2009-04-07
Classification: B01D,B01J,C07C

Abstract:
1. A process for producing a high purity organic solvent from a crude organic solvent comprising: providing a stream of a crude organic solvent comprising a first amount of at least one UV absorbing impurity; contacting said crude organic solvent stream with an adsorbent comprising a first porous material having a pore volume from about 0.1 to about 0.8 ml/g and a second porous material having a pore volume from about 1.0 to about 1.5 ml/g, wherein said first and second porous materials are independently selected from the group consisting of activated carbons, synthetic carbons, synthetic adsorbents, and inorganic molecular sieves; and adsorbing at least one dissolved UV absorbing impurity contained in said crude organic solvent onto said adsorbent to produce a purified organic solvent comprising a second amount of UV absorbing impurities, the second amount of impurities being less than the first amount of impurities; wherein said organic solvent is selected from the group consisting of C