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Production method and production equipment for synthesizing ethanolamine by ethylene oxide

A technology of ethylene oxide and ethanolamine is applied in the preparation of organic compounds, the method of chemically changing substances by atmospheric pressure, chemical instruments and methods, etc. , the safety factor is improved, the effect of good condensation effect

Inactive Publication Date: 2010-06-16
GUANGXI RES INST OF CHEM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When using this reagent to synthesize ethanolamine, the reaction is violent and extremely difficult to control

Method used

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  • Production method and production equipment for synthesizing ethanolamine by ethylene oxide

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0038] Example 1: Measure 60 ml of ethylene oxide with a mass content of ≥99% and 100 ml of ammonia water with a mass content of 25% and put them in a freezer at -10 to 5°C for later use. Attached figure 1After the equipment is installed, the pressurizing valves 3 and 7 and the tail gas absorption valve 5 are in the closed state, and the mass flow meter and other valves are in the open state. Pour the prepared ammonia water into the cylinder from the feeding funnel. Close the feed valves 1 and 2, open the pressurization valves 3 and 7, after the ammonia water enters the reactor completely, the internal pressure of the reactor starts to rise until the reading on the nitrogen meter above the reactor is 1.5Mpa, close the pressurization valves 3 and 7 And feed valve 4, open feed valve 1,2. Quickly pour the prepared ethylene oxide into the cylinder from the funnel, and close the feed valves 1 and 2.

[0039] Turn on the heat transfer device and stirring device of the reactor, an...

example 2

[0040] Example 2: Measure 80 ml of ethylene oxide with a mass content of ≥99% and 150 ml of ammonia water with a mass content of 25% and put them in a freezer at -10 to 5°C for later use. Attached figure 1 Install the equipment. The pressurizing valves 3 and 7 and the tail gas absorbing valve 5 are in the closed state, and the mass flow meter and other valves are in the open state. Pour the prepared ammonia water from the funnel into the cylinder. Close feed valve 1, 2, open pressurization valve 3, 7, after ammoniacal liquor enters reactor completely, reactor internal pressure begins to rise, until the reading on the nitrogen gauge above reactor is 1.8MPa, close pressurization valve 3, 7 and feed valve 4, open valves 1 and 2. Quickly pour the prepared ethylene oxide into the cylinder from the feeding funnel, and close the feeding valves 1 and 2.

[0041] Turn on the condensing device and stirring device of the reactor, and control the temperature of the reactor at 25-30°C....

example 3

[0042] Example 3: Measure 110 ml of ethylene oxide with a mass content of ≥99% and 200 ml of ammonia water with a mass content of 25% and put them in a freezer at -10 to 5°C for later use. Attached figure 1 Install the equipment. The pressurizing valves 3 and 7 and the tail gas absorbing valve 5 are in the closed state, and the mass flow meter and other valves are in the open state. Pour the prepared ammonia water into the cylinder from the feeding funnel. Close feed valve 1, 2, open pressurization valve 3, 7, after ammoniacal liquor enters reactor completely, reactor internal pressure begins to rise, until the reading on the nitrogen gauge above reactor is 1.8MPa, close pressurization valve 3, 7 and feed valve 4, open valves 1 and 2. Quickly pour the prepared ethylene oxide into the cylinder from the funnel, and close the feed valves 1 and 2.

[0043] Turn on the condensing device and stirring device of the reactor, and control the temperature of the reactor at 25-30°C. ...

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Abstract

The invention discloses a method for synthesizing ethanolamine by ethylene oxide, which is characterized by comprising the following steps: reacting more than or equal to 99 mass percent ethylene oxide with 25 mass percent aqueous ammonia or liquid ammonia under the protection of nitrogen and the freezing condition of between 10 DEG C below zero and 5 DEG C in a molar ratio of the reaction to form ethanolamine mixed solution with certain concentration, then dehydrating, de-aminizing and rectifying the ethanolamine mixed solution to obtain three colorless fractions, namely mono-ethanolamine, di-ethanolamine and triethanolamine, and absorbing the tail gas by water. A device for synthesizing the ethanolamine by the ethylene oxide consists of a feeding device, a reaction device and a tail gas absorbing device. The product obtained through the process has little impurity, has no color and is convenient for application and popularization for the ethanolamine synthesizing reaction in scientific research and production.

Description

technical field [0001] The invention relates to chemical reaction and equipment, in particular to a production method and equipment for synthesizing ethanolamine from ethylene oxide. Background technique [0002] Ethanolamine has three homologues, namely: monoethanolamine (MEA), diethanolamine (DEA), and triethanolamine (TEA). Ethanolamine molecules contain amino groups (basicity) and hydroxyl groups (hydrophilicity), which have various chemical properties and uses of amines and alcohols. As an important chemical product, ethanolamine is widely used in textiles, organic synthesis, surface treatment, gas purification and absorption, metallurgy and other aspects. [0003] At present, the technical route for producing ethanolamine in the world is mainly the ammoniation of ethylene oxide. That is: under a certain temperature and pressure, a certain molar ratio of ethylene oxide and ammonia water or liquid ammonia are subjected to nucleophilic substitution and ring-opening reac...

Claims

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Application Information

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IPC IPC(8): C07C213/04C07C215/08C07C215/12B01J3/02B01J3/04B01J4/02
Inventor 黄尚顺王俊李华锋黄科林方峰
Owner GUANGXI RES INST OF CHEM IND CO LTD
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