Patent ID: 6555611
Filing Date: 2003-04-29
Classification: B01D,B01J,C02F,C08G,C08K,C09D

Abstract:
A method of removing an aromatic hydroxy compound in an aqueous solvent or organic solvent containing an aromatic hydroxy compound, which comprises bringing the solvent containing the aromatic hydroxy compound and an adsorbent into contact with each other to allow the adsorbent to adsorb the aromatic hydroxy compound, the absorbent comprised of hydrotalcite-like composite metal hydroxide particles of formula (2),(Mgy1M2+y2)1-zAlz(OH)2+a(Anâˆ’)b*mH2Oâ€ƒâ€ƒ(2) wherein M2+ is divalent metal ion or ions of Zn2+ and/or Ca2+, Anâˆ’ is an anion having a valence of n, and Y1, Y2, z, a, b and m satisfy the following conditions, Y1+Y2=1 0<y1&lE;1 0.1<z<0.5 z=a+nb a>0.1z 0&lE;b0&lE;m<2, and wherein the organic solvent is a solvent containing at least 60% by weight of at least one organic solvent selected from the group consisting of a lower alcohol, an ether, a ketone and an aromatic hydrocarbon.