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Method for producing pure triethanolamine containing micro-water

A technology of triethanolamine and production process, applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc., can solve the problems of discontinuous production process, unstable product quality, low production efficiency, etc., and achieve stable product quality, The effect of low production cost and high production efficiency

Inactive Publication Date: 2008-01-09
LIAONING HUAFENG CHEM INDS GROUP
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a stable product quality, high production efficiency, The production process method of low-purity triethanolamine with good safety and low production cost, low energy consumption, no pollution to the environment, all realize automatic control, and have broad application prospects in industrial production

Method used

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  • Method for producing pure triethanolamine containing micro-water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Ammonia absorption process:

[0021] Liquid ammonia is transported to the bottom of the ammonia absorption tower 3 at a pressure of 1500kPa (gauge pressure) and an ammonia flow rate of 120kg / h, and is transported from the desalted water storage tank 2 to the top of the ammonia absorption tower 3 by a pump with a water volume of 1200kg / h Water, operating pressure at the top of the tower is 100kPa (gauge pressure), temperature is 35 ℃, after 2.5h, be dissolved into the ammoniacal solution of 10% in concentration, then, stop replenishing liquid ammonia and water, the liquid level at the bottom of the tower is 40% ;

[0022] (2) ethanolamine generation reaction process:

[0023] 10% aqueous ammonia solution is delivered to the reactor 5 at one time with a flow rate of 1800kg / h, and ethylene oxide is delivered to 5 tubular reactors 5 in series with a flow rate of 185kg / h respectively. The total amount of oxyethane fed was 925 kg. Adopt intercooler to control the inlet...

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Abstract

Production of low-purity micro-triethanolamine is carried out by mixing ammonia with ethylene epoxide by mixer, reacting ammonia solution 5-30 wt% with ethylene epoxide in serial tubular reactor in proportion of 0.3-1.0 mol, controlling reactor temperature at inlet and outlet by intermediate cooler, absorbing ammonia, generating ethanolamine, denitrifying and dewatering. Ammonia solution is poured for one time; ethylene epoxide is filled into serial tubular reactor by multi-points. It's efficient, cheap, safe, automatic, stable and rational. It has less consumption and no environmental pollution. It can be used for continuous production.

Description

technical field [0001] The invention belongs to the production technology of ethanolamine, in particular to a process for producing low-purity triethanolamine containing a small amount of water. Background technique [0002] At present, there is a great demand for trace water and low-purity triethanolamine products in the market. And it is widely used in the preparation of surfactants, detergents, stabilizers, emulsifiers, fabric softeners and antistatic agents, etc., and is also used as hydrogen sulfide absorbents, anti-corrosion additives for lubricating oils, anti-rust agents and coolants for metal processing Wait. It is used as a cement accelerator in the construction industry, as a co-catalyst in the polyurethane foaming process, as an activator in the polymerization of nitrile rubber, etc. [0003] However, the current process for producing low-purity triethanolamine containing a small amount of water generally adopts a kettle-type discontinuous production process, t...

Claims

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Application Information

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IPC IPC(8): C07C215/12C07C213/04
Inventor 王永林孙若雷何群生
Owner LIAONING HUAFENG CHEM INDS GROUP
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