Patent ID: 6964728

Claim:
A process which comprises distilling in a column a distillable liquid from a liquid mixture, said liquid mixture comprising (i) said distillable liquid, (ii) one or more liquid component(s) other than said distillable liquid, and (iii) dissolved solid component(s), comprised of 2,2-propylenebis[4,4'-(2,6-dibromophenol)], wherein said distilling is conducted at a temperature at which said distillable liquid is being distilled from said liquid mixture, wherein said dissolved solid component(s) tend(s) to precipitate from the distillate and thereby cause pluggage in the distillation column, and wherein there is added to said liquid mixture an amount of tribromophenol which forms with said dissolved solid component(s) a composition that melts below the temperature at which said distillable liquid distills, the amount of tribromophenol added to said liquid mixture being an amount which forms with substantially all of said dissolved solid component(s) a composition that melts below the temperature at which said distillable liquid is being distilled, so that said pluggage is minimized or avoided.