PROCESS FOR RECOVERING 2,6-DIALKYL ISOMERS OF NAPHTHALENE FROM THEIR MIXTURES OF ISOMERS

摘要

1. A process for the recovery of 2.6-dialkyl naphthalenes from the group of methyl-n-propyl, methyl-isopropyl, methyl-n-butyl, methyl-isobutyl, ethyl-isopropyl, ethyl-n-butyl, di-n-propyl, di-isopropyl, methyl-amyl, ethyl-amyl, propyl-amyl, di-n-butyl or diisobutyl naphthalenes from mixtures of the isomers thereof by crystallization from a solution in a polar solvent, characterized in that the precipitation of the 2.6-dialkyl naphthalene also in the presence of other high-melting isomers is performed during constant stirring by cooling to a temperature in the range of +25 to -30 degrees C.