Dripping device and method for Grignard hydrolysis reaction in maltol production

Abstract

The invention belongs to the technical field of maltol production, and particularly relates to a dropwise adding device and method for Grignard hydrolysis reaction in maltol production. The dripping device comprises a hydrolysis kettle, the top of the hydrolysis kettle is connected with a hydrolysis head tank, the bottom of the hydrolysis kettle is connected with a wastewater receiving tank, the top of the wastewater receiving tank is connected with a wastewater distillation kettle, and a pipeline for connecting the wastewater receiving tank and the wastewater distillation kettle is provided with a pump I and a switch valve V; the top of the wastewater distillation kettle is connected with a condenser, the bottom of the wastewater distillation kettle is connected with a pre-filter-pressing storage tank, a second pump is arranged on a pipeline for connecting the pre-filter-pressing storage tank and a filter press, the filter press is connected with a hydrolysis head tank, and the hydrolysis head tank is used for containing process water. And the cyclic utilization of the steam condensate for cleaning the hydrolysis kettle is realized by the dropwise adding method. According to the invention, organic matters such as basic magnesium chloride, toluene, tetrahydrofuran, furfuryl alcohol and the like in sewage generated after the wall of the reaction kettle is cleaned are recycled, and the wastewater treatment difficulty and cost are reduced.

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