METHOD FOR CLEANING DEPOSITS FROM EQUIPMENT THAT HAVE ACCUMULATED DURING A METHOD FOR RECOVERING NMP BY THE INTRODUCTION OF HOT WATER AND AGITATION

摘要

A process is proposed for cleaning an apparatus to remove deposits from a process for the recovery of purified N-methylpyrrolidone (NMP) by evaporating NMP from a contaminated NMP stream which is obtained in a process for the extractive separation of acetylene from the reaction mixture of a partial oxidation of hydrocarbons after expulsion of the acetylene as a gas, wherein hot water is passed into the apparatus and is stirred.