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Production of triethanolamine products

A technology of triethanolamine and triethanolamine stock solution, applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc., can solve problems such as increased negative reactions, high reaction temperature, easy backflow of materials, etc., and achieve rapid and complete reactions, increased Effects of large specific surface area and improved product yield

Active Publication Date: 2006-07-19
JIAHUA CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. The system pressure is high, the operation is not stable, the material is easy to flow back, and the safety is not high;
[0004] 2. The reaction temperature of the system is high, and the negative reaction increases, resulting in low product yield;
[0005] 3. Ethylene oxide is easy to self-polymerize to form sticky matter at higher temperature, which will block the pipeline of the reaction equipment and affect the production efficiency

Method used

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  • Production of triethanolamine products
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment one: 250Kg liquefied ammonia is mixed with concentration and is the ammoniacal solution of 25%, injects in the reaction vessel, then directly pressurizes 1400Kg ethylene oxide and injects in the reaction vessel and reacts with the ammoniacal solution by metering tank again; The pump 5 removes the material in the reaction vessel 1, cools down in the heat exchanger 4, and then sprays it into the reaction vessel through the static atomization injector 3 installed in the reaction vessel. This cycle accelerates the reaction of the material, and the reaction is complete, and triethanolamine is produced. Stock solution; the entire reaction time is 2.5 hours, the temperature in the reaction vessel 1 is 60°C, and the reaction pressure is 0.1Mpa. The obtained triethanolamine stock solution was distilled in a distillation pot for about 2 hours to obtain 1630 Kg of a triethanolamine product with an effective content of triethanolamine of 85%.

Embodiment 2

[0024] Embodiment two: 250Kg liquefied ammonia is mixed with concentration and is the ammoniacal solution of 25%, injects in the reaction vessel, then directly pressurizes 1425Kg ethylene oxide and injects in the reaction vessel and reacts with the ammoniacal solution by metering tank again; The pump 5 removes the material in the reaction vessel 1 and sprays it into the reaction vessel 1 through the static atomization injector 3 provided in the reaction vessel after being cooled by the heat exchanger 4. This circulation makes the reaction of the material accelerate and the reaction is complete, and three Ethanolamine stock solution; the entire reaction time is 3 hours, the temperature in the reaction vessel is 60°C, and the reaction pressure is 0.06Mpa. The obtained triethanolamine stock solution was distilled in a distillation pot for about 2 hours to obtain 1660 Kg of a triethanolamine product with an effective content of triethanol of 85.2%.

Embodiment 3

[0025] Embodiment three: 250Kg liquefied ammonia is mixed with concentration and is the ammoniacal solution of 25%, injects in the reaction vessel, then directly pressurizes 1450Kg ethylene oxide and injects in the reaction vessel and reacts with the ammoniacal solution by metering tank again; Then by external circulation The pump 5 removes the material in the reaction vessel 1 and sprays it into the reaction vessel through the static atomization injector 3 provided in the reaction vessel after being cooled by the heat exchanger 4. This circulation makes the reaction speed of the material faster and the reaction is complete, and three Ethanolamine stock solution; the entire reaction time is 2 hours, the temperature in the reaction vessel is 60°C, and the reaction pressure is 0.2Mpa. The obtained triethanolamine stock solution was distilled in a distillation pot for about 2 hours to obtain 1670 Kg of a triethanolamine product with an effective content of triethanolamine of 85.3%...

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Abstract

A liquid-phase reacting process for triethanolamine is characterized by pressurizing by measuring tank, entering into reactor, reacting with ammonia, transferring the materials in reactor by external circulating pump, lowering temperature by heat exchanger, spraying into reactor by static atomizing sprayer, material accelerating reacting, and obtaining triethanolamine primary liquid. It achieves low consumption and by-reaction, and high production output efficiency.

Description

1. Technical field [0001] The invention relates to a liquid-phase reaction method for producing triethanolamine products. 2. Background technology [0002] In the prior art, the production of triethanolamine products is to first vaporize ethylene oxide through a vaporization tank and then enter the reaction vessel to react with ammonia water at a reaction pressure of 0.3-0.4Mpa and a reaction temperature of 100-110°C to form triethanolamine. Ethanolamine stock solution, and then purified by distillation to obtain triethanolamine product. There are following deficiencies in the method for above-mentioned production triethanolamine product: [0003] 1. The system pressure is high, the operation is not stable, the material is easy to flow back, and the safety is not high; [0004] 2. The reaction temperature of the system is high, and the negative reaction increases, resulting in low product yield; [0005] 3. Ethylene oxide is easy to self-polymerize to form a viscous subst...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C215/06C07C213/04
Inventor 李金彪
Owner JIAHUA CHEM
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