System for continuously preparing N, N'-ethylene bis stearamide through micro-channel and method thereof

Abstract

The invention relates to a system for continuously preparing N, N'-ethylene bis stearamide. The system comprises a stearic acid melting tank, ethylenediamine storage tank, the stearic acid conveying and metering device and the ethylenediamine conveying and metering device are respectively connected with the stearic acid melting tank and the ethylenediamine storage tank; the neutralization and salification micro-reaction device is connected with the stearic acid conveying and metering device and the ethylenediamine conveying and metering device, and is sequentially connected with a catalytic dehydration device and a spray granulation device; and a catalytic dehydration device is connected with a catalyst antioxidant storage tank. The invention further provides a method for preparing N, N'-ethylene bis stearamide, continuous production of N, N'-ethylene bis stearamide is achieved through the micro-channel continuous reaction system with efficient mass and heat transfer performance, the automatic control level is high, the safety is high, the production cost is low, the product purity is high, and the quality is stable.

Description

technical field [0001] The invention belongs to the technical field of fine chemicals, and in particular relates to a system and method for continuously preparing N,N'-ethylene bisstearamide through a microchannel. Background technique [0002] N, N'-ethylene bis stearamide (referred to as EBS, EBA) is an important amide compound, molecular formula C 38 h 76 N 2 o 2 , CAS No. 110-30-5, white fine powder, melting point 140-145°C, insoluble in most organic solvents at room temperature, soluble in hot aromatic and chlorinated hydrocarbon solvents, insoluble in water. Non-toxic, no toxic side effects on the human body. It has good chemical stability and high thermal stability, and can significantly improve the physical properties of other substances, and its application range is very wide. [0003] Used as a lubricant, anti-sticking agent, release agent, and surface treatment agent in plastic and rubber products, it can play the dual role of internal lubrication and externa...

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Problems solved by technology

[0017] The difference between the existing domestic EBS production methods lies in the use of different catalysts. The processes of stearic acid melting, neutralization into salt and catalytic dehydration are carried out in a single tank or multiple tanks. These production methods are all batch-stirred tank production processes. Disadvantages are: ①The nitrogen replacement is frequent in intermittent operation, the replacement effect is difficult to guarantee, and the nitrogen consumption is large; ②The mass transfer and heat transfer efficiency of the reactor is low, and the ethylenediamine dripping time is long, which may easily cause local overheating, overtemperature and overpressure, etc. ③Long reaction time of intermittent operation, many side reactions, unstable product quality, repeated heating and cooling of the reactor, low efficiency of heat energy utilization, high production cost, etc.

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