Avoidance of solid deposits in drop strippers by spraying in suitable liquids

摘要

Process of preparing bis(4-hydroxyaryl)alkanes (I) from adducts of bis(4-hydroxyaryl)alkanes and aromatic monohydroxy compounds comprises: (a) passing an inert gas through a melt of an adduct of a bis(4-hydroxyaryl)alkane and an aromatic monohydroxy compound at 150-230[deg] c, where the inert gas stream removes the aromatic monohydroxy compound from the melt; (b) removing the aromatic compound from the inert gas by condensation; (c) compressing, purifying, and passing the inert gas through at least one demister that is charged with a liquid; and (d) recycling the inert gas to the step (a). An independent claim is included for the bis(4-hydroxyaryl)alkane with a content of aromatic monohydroxy compound of less than 100 ppm prepared by the process.