Patent ID: 6358372
Filing Date: 2002-03-19
Classification: B01J,C08F,Y02P

Abstract:
A method of removing at least one inert reaction diluent or wash diluent from a waste stream from a catalyst precursor production unit, whereby the waste stream includes at least one reaction diluent or wash diluent selected from a group consisting of butane, pentane, hexane, heptane, octane, xylene, toluene, methylene chloride, chlorotoluene, and chlorobenzene, titanium alkoxide, magnesium alkoxide, and ethanol, the method comprising:contacting the waste stream with a solubilization solvent selected from the group consisting of octanol and decanol; and subjecting the resulting stream to distillation such that precipitation of solids during distillation is prevented or reduced, wherein the solubilization solvent: (i) is present in an amount sufficient to maintain the solubility of residual titanium and magnesium alkoxide species; (ii) has a boiling point higher than any reaction diluent or wash diluent; and (iii) does not form an azeotrope with the reaction diluent or wash diluent.