A kind of diethyltoluenediamine synthesis device and its synthesis process

Abstract

The present invention relates to the technical field of diethyltoluenediamine synthesis, in particular to a diethyltoluenediamine synthesis device and a synthesis process thereof. The diethyltoluene diamine synthesis device includes a housing, and a first The gas phase inlet and the first liquid phase inlet are provided with a discharge pipe below, and a feed pipe is provided above the shell. The inner space of the feed pipe is divided into a gas phase area and a liquid phase area, and the first raw material is dispersed under the feed port. device, the first raw material dispersing device includes the first gas phase dispersing pipeline communicated with the gas phase area and the first liquid phase dispersing pipeline communicated with the liquid phase area; a catalyst bed is arranged below the first raw material dispersing device, and the first raw material dispersing The cavity between the device and the catalyst bed is a homogenization space. The diethyltoluenediamine synthesis device provided by the invention has the advantages of compact structure, high production efficiency, uniform dispersion of raw materials, prolonging the service life of the catalyst bed and improving product quality.

Description

technical field [0001] The invention relates to the technical field of diethyltoluenediamine synthesis, in particular to a diethyltoluenediamine synthesis device and a synthesis process thereof. Background technique [0002] Diethyltoluenediamine usually uses toluenediamine and ethylene as raw materials, in the presence of a catalyst, an alkylation reaction occurs under high temperature and high pressure conditions to obtain crude diethyltoluenediamine, and then rectified to obtain diethyltoluenediamine. Pure ethyltoluenediamine. At present, the commonly used synthesis reaction equipment is a high-pressure reactor and a fixed-bed reactor. When a high-pressure reactor is used for the synthesis reaction, the crude diethyltoluenediamine and the catalyst are mixed together, and the two need to be separated after the reaction. The ethyltoluenediamine and the catalyst can only enter the rectification link after being separated from the catalyst, and the process steps are relative...

AI Technical Summary

Problems solved by technology

However, when a fixed-bed reactor is used for the reaction, there is a problem of uneven gas flow distribution when ethylene and toluenediamine enter the fixed-bed reactor, and the catalyst bed layer is prone to dead zones and short circuits under the impact of the unbalanced gas flow, causing some catalysts to exceed Premature deactivation due to load, while another part of the catalyst does not work, which leads to the deterioration of the entire reaction process in the reactor and the decline in reactor performance

Images