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Method for synthesizing monoethanolamine

A synthesis method and ethanolamine technology are applied in chemical instruments and methods, preparation of organic compounds, preparation of aminohydroxy compounds, etc., can solve problems such as low conversion rate and low yield, and achieve the effect of complete conversion and high yield

Active Publication Date: 2009-05-20
JIANGSU YUANYANG PHARMA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] This method is owing to can produce diethanolamine, two kinds of by-products of triethanolamine in the reaction process, so conversion rate is low (about 30%), because conversion rate is low, therefore yield is also low

Method used

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  • Method for synthesizing monoethanolamine
  • Method for synthesizing monoethanolamine
  • Method for synthesizing monoethanolamine

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The mass percentage concentration is 5% hydroxyacetonitrile aqueous solution 579g and catalyzer is the nickel-aluminum-copper alloy powder 0.144g (the mass percentage of Ni is 98%, the mass percentage of Al is 0.5%, the mass percentage of Cu is the nickel-aluminum-copper alloy powder 0.144g of carrier loading Al and Cu with Ni) The mass percentage is 1.5%) into a 1000mL hydrogenation reactor, under stirring, add 30g of hydrogen from the hydrogenation port of the hydrogenation reactor, control the temperature of the reaction temperature to 200°C, keep the reaction for 18h, and stop when the pressure no longer changes Heating, cooling, discharging, transferring the feed liquid to a 1000mL three-necked flask, and distilling under reduced pressure to obtain 42.8g of pure monoethanolamine. The conversion rate of monoethanolamine is 81.5%, and the yield of monoethanolamine is 70.16%.

Embodiment 2

[0027] The mass percent concentration is 10.2% hydroxyacetonitrile aqueous solution 558.9g and catalyzer is the nickel-aluminum-copper alloy powder 0.057g (the mass percent of Ni is 99%, the mass percent of Al is 0.7%, Cu The mass percentage is 0.3%) into a 1000mL hydrogenation reactor, under stirring, add 22g of hydrogen from the hydrogenation port, control the temperature of the reaction to 80°C, keep the reaction for 16h, stop heating when the pressure no longer changes, and then cool down. Discharging, transferring the feed liquid to a 1000mL neck bottle, and distilling under reduced pressure to obtain 44g of pure monoethanolamine. The conversion rate of monoethanolamine is 81.5%, and the yield of monoethanolamine is 72.13%.

Embodiment 3

[0029] Be that 20.5% hydroxyacetonitrile aqueous solution 278g and catalyzer take Ni as the nickel-aluminum-copper alloy powder 0.085g of carrier loading Al and Cu (the mass percentage of Ni is 97%, the mass percentage of Al is 1.4%, the mass percentage of Cu is The mass percentage is 1.6%) into a 1000mL hydrogenation reactor, under stirring, add 16g of hydrogen gas from the hydrogenation port, control the reaction temperature to 90°C for temperature rise, keep the reaction for 14h, stop heating when the pressure does not change, cool down, and discharge , Transfer the feed liquid to a 1000mL three-necked flask, and distill under reduced pressure to obtain 47g of pure monoethanolamine. The conversion rate of monoethanolamine is 86.5%, and the yield of monoethanolamine is 77.05%.

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Abstract

The invention discloses a synthesis method of monoethanolamine, pertaining to the technical field of organic chemical synthesis. Hydroxyacetonitrile is adopted for carrying out reaction with hydrogen under the presence of a catalyst to obtain the monoethanolamine. Compared with the prior art, the technical proposal has the advantages of full transformation (more than 81 percent) and high yield (more than 70 percent).

Description

technical field [0001] The invention relates to a synthesis method of monoethanolamine, which belongs to the technical field of organic chemical synthesis. Background technique [0002] Monoethanolamine, also known as 2-aminoethanol, has the molecular formula NH 2 CH 2 CH 2 Oh. [0003] At present, ethylene oxide is mainly used to synthesize monoethanolamine, which is obtained by reacting ethylene oxide and ammonia under the conditions of silver catalyst and high temperature and high pressure. The reaction equation is as follows: [0004] [0005] First step side effects: [0006] [0007] The second step side reaction: [0008] [0009] This method can produce two kinds of by-products of diethanolamine and triethanolamine in the reaction process, so the conversion rate is low (about 30%), and because the conversion rate is low, the yield is also low. Contents of the invention [0010] The object of the present invention is to provide a kind of synthetic met...

Claims

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Application Information

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IPC IPC(8): C07C215/08C07C213/02B01J23/70
Inventor 陆昌元陆建平王剑峰温建华
Owner JIANGSU YUANYANG PHARMA
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