Patent ID: 6465682
Filing Date: 2002-10-15
Classification: B01J,C07C

Abstract:
A production process for a hydroxyalkyl ester, which comprises the steps of:a) providing a reactor and a liquid storing tank, wherein the liquid storing tank includes a reaction terminating liquid at a temperature of âˆ’5 to 45Â° C.; b) further providing an equalizer line and a liquid-introducing pipe between the reactor and the liquid storing tank, wherein the equalizer line keeps pressure uniform between the reactor and the liquid storing tank, and wherein the liquid-introducing pipe permits the reaction terminating liquid to be introduced into the reactor from the liquid storing tank; c) arranging the liquid storing tank upwardly of the reactor such that the reaction terminating liquid is flowable by gravity from the liquid storing tank to the reactor; d) carrying out a reaction between a carboxylic acid and an alkylene oxide in the reactor in the presence of a catalyst in order to produce the hydroxyalkyl ester; and e) stopping the reaction by introducing the reaction terminating liquid into the reactor, wherein the reaction terminating liquid comprises water in a ratio of not less than 50 weight %, and has a low temperature of âˆ’5 to 45Â° C., and wherein an amount of the reaction terminating liquid as introduced is in the range of 5 to 200 weight % of a reaction liquid of the reaction; f) whereby an exothermic reaction is stopped by reliance on gravity and a dropping from the liquid storing tank through the liquid-introducing pipe and into the reactor of the reaction terminating liquid comprising water as soon as cause arises.