A kind of triple production continuous production method of propynyl alcohol, 1,4-butynediol and urotropine

Abstract

The invention discloses a trigeneration continuous production method for propiolic alcohol, 1,4-butinodiol and urotropine, and belongs to the technical field of chemical engineering. According to the method, a formaldehyde aqueous solution (10%-37% wt) and acetylene are taken as raw materials for synthesizing propiolic alcohol and co-producing 1,4-butinodiol and urotropine, the reaction temperature is 80-120 DEG C, the pressure is 1.0-2.5 MPa, and propiolic alcohol with the purity of 99.5% or more, a 1,4-butinodiol aqueous solution and a urotropine aqueous solution are obtained. The conversion rate of formaldehyde in the whole technology is 100%, and the method has the advantages of safety and environment friendliness.

Description

technical field [0001] The invention relates to the technical field of chemistry and chemical engineering, in particular to a continuous production method for triple production of propynyl alcohol, 1,4-butynediol and urotropine. Background technique [0002] Propargyl alcohol is also called propargyl alcohol, 2-propyn-1-ol, and its English name is Propargyl alcohol, referred to as PA. It is an important organic chemical raw material with a wide range of applications. In the pharmaceutical industry, propynyl alcohol is an important intermediate in the synthesis of fosfomycin calcium, fosfomycin sodium, sulfadiazine, etc., and is also used in the production of acrolein, allyl alcohol, and vitamin A. In the pesticide industry, propynyl alcohol is mainly used in the production of moxamethide pesticide, which is a low-toxicity, broad-spectrum acaricide, which is effective in preventing and controlling acarids in various crops such as vegetables, citrus, apples, tea, cotton, and ...

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Problems solved by technology

Similar to the slurry bed production process, acetylene is also easy to form large bubbles inside the reactor in this process, resulting in detonation and local overheating of the bed

And because the catalyst particles are in a state of constant collision and friction with each other, the phenomenon of catalyst micronization will occur, which will lead to the blockage of the micropores of the outlet sand core glass and affect the stable operation of the reactor.

[0011] In the three production processes, formaldehyde can be converted by more than 90%, but it cannot be completely converted, and formaldehyde-containing wastewater is generated in the effluent, which is difficult to treat, and direct discharge will cause environmental pollution. So far, no literature or patent has proposed to solve this problem. efficient approach to the problem

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