| abstract |
This invention relates to a method for removing organic directing agents from as-synthesized molecular sieves comprising: (a) contacting said porous synthetic material with polar solvent having dissolved therein at least one cation donor, wherein said polar solvent is characterized by solubility parameters fd, fp, and fh wherein the values of solubility parameters fd, fp, and fh are defined by a circular region of the Teas diagram of Figure 41, said circular region having a center defined by the coordinates (fd=46, fp=22, fh=32) and encompassing about 21 percent of the total area of said Teas diagram of Figure 41, and wherein each of said sorbed templating agent and said cation donor are soluble in said polar solvent; and (b) holding said porous synthetic material, said nonaqueous polar solvent, and said cation donor of step (a) in contact at elevated temperature for a period of time sufficient to absorb at least a portion of said templating agent from said synthetic material. |