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

Method used

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

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Example Embodiment

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

[0039] Turn on the heat transfer device and stirring device of the reactor, and control the temperature of the reactor at 25-30°C. Open the pre...

Example Embodiment

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

Example Embodiment

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

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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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