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Method for preparing ethylenediamine from glycol and ammonia

A technology of ethylene glycol and ethylenediamine, applied in the field of preparing ethylenediamine, can solve the problem of low activity

Inactive Publication Date: 2011-09-21
ZHANGJIAGANG HUIER CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The catalyst used in the ethanolamine method is mainly hydrogen molecular sieve, which has the disadvantage of low activity

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038]Raw material selection concentration is 95% ethylene glycol, containing 5% water, another raw material is liquid ammonia, the mol ratio of ethylene glycol and ammonia is 1: 2, 275 ℃ of reaction temperatures, reaction pressure 0.5Mpa, the composition of catalyst Be copper 35%, zirconium 10%, zinc 25%, titanium 30%, packing catalyst 4.2kg, the space velocity of the feed of alcohol is 0.5 gram alcohol every gram catalyst per hour, i.e. 2.1kg / h, reaction result shows, B The single-pass conversion of diol is 60%, and the yield of ethylenediamine is 32.2%.

Embodiment 2

[0040] The selected concentration of raw materials is anhydrous ethylene glycol, another raw material is saturated ammonia water, the molar ratio of ethylene glycol to ammonia is 0.1:1, the reaction temperature is 300°C, the reaction pressure is 0.3Mpa, the composition of the catalyst is copper 15%, zirconium 30 %, zinc 25%, titanium 30%, packing catalyst 4.1kg, the space velocity of the feed of alcohol is 2 gram alcohols per gram catalyst per hour, i.e. 8.2kg / h, the reaction result shows that the single pass conversion of ethylene glycol is 71%, and the yield of ethylenediamine is 30.5%. .

Embodiment 3

[0042] Raw material selection concentration is 80% ethylene glycol, containing 20% ​​water, another raw material is liquid ammonia, the mol ratio of ethylene glycol and ammonia is 1: 30, 250 ℃ of reaction temperatures, reaction pressure 3Mpa, the composition of catalyst is Copper 45%, zirconium 5%, zinc 50%, packing catalyst 4.2kg, the space velocity of the feeding of alcohol is 0.5 gram alcohol per gram catalyst per hour, i.e. 2.1kg / h, the reaction result shows that the one-way conversion of ethylene glycol The yield was 90%, and the yield of ethylenediamine was 55.4%.

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PUM

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Abstract

The invention provides a method for preparing ethylenediamine from reactants of glycol and ammonia in the presence of a solid catalyst with a main component of copper through a hydrogenation and amination one-step method. The method comprises the following steps of: making glycol containing water or not containing water and ammonia enter a reactor filled with the catalyst with a main component of copper, performing dehydrogenation to obtain the ethylenediamine and water and an ethanolamine byproduct, and separating the mixture obtained through reaction to obtain the product of ethylenediamine.

Description

technical field [0001] The invention relates to a method for preparing ethylenediamine through hydroamination of ethylene glycol and ammonia in the presence of a copper-based solid catalyst. The reaction equation is as follows: [0002] HOCH 2 CH 2 OH+2NH 3 --->NH 2 CH 2 CH 2 NH 2 +2H 2 o [0003] The by-products include ethanolamine and dimerization or polymer (ethyleneamine) of ethylenediamine, and the reaction equation is as follows: [0004] HOCH 2 CH 2 OH+NH 3 --->HOCH 2 CH 2 NH 2 +H 2 o [0005] 2HOCH 2 CH 2 OH+3NH 3 --->NH 2 CH 2 CH 2 NHCH 2 CH 2 NH 2 +4H 2 o [0006] wxya 2 CH 2 OH+(n+1)NH 3 --->NH 2 CH 2 CH 2 (NHCH 2 CH 2 ) n-1 NH 2 +2nH 2 o technical background [0007] Ethylenediamine is an important chemical basic raw material, used as solvent, stabilizer, chelating agent, synthetic resin, drug, inhibitor. In recent years, as the demand for TEAD (tetraacetylethylenediamine) used in phosphorus-free detergents ha...

Claims

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Application Information

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IPC IPC(8): C07C211/10C07C209/16
Inventor 左卫雄刘胜
Owner ZHANGJIAGANG HUIER CHEM TECH
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