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Triethanolamine production method

A technology of triethanolamine and ethylene oxide, used in chemical instruments and methods, preparation of organic compounds, preparation of aminohydroxy compounds, etc., can solve the problems of low yield of triethanolamine and high by-products, and achieve high density of active centers, Suppression of amine ether by-products and high exposed surface area

Active Publication Date: 2015-11-25
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0006] The invention relates to a method for producing triethanolamine, which mainly solves the technical problems of low triethanolamine yield and high by-products in the existing ethanolamine production technology

Method used

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  • Triethanolamine production method

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Embodiment 1

[0019] The fixed-bed reactor is filled with a binder-free hydrogen type ZSM-5 zeolite molecular sieve catalyst, the zeolite grain size is 200-300 nanometers, silicon-alumina (SiO 2 / Al 2 o 3 ) molar ratio is 15, under the condition that reaction pressure is 4MPa, and reaction temperature is 83 ℃, pass into anhydrous ammonia and oxirane to react, wherein ammonia / oxirane molecule molar ratio is 6.9, and epoxy The feed gravimetric space velocity of ethane is 0.2h -1 , the weight ratio of monoethanolamine, diethanolamine and triethanolamine in the product is 38.6:36.2:25.2.

Embodiment 2

[0021] The fixed-bed reactor is filled with a binder-free hydrogen type ZSM-5 zeolite molecular sieve catalyst, the zeolite grain size is 200-300 nanometers, silicon-alumina (SiO 2 / Al 2 o 3 ) molar ratio is 15, under the condition that the reaction pressure is 4MPa and the reaction temperature is 71°C, feed anhydrous ammonia and ethylene oxide to react, wherein the ammonia / ethylene oxide molecular molar ratio is 4.0, epoxy The feed gravimetric space velocity of ethane is 0.2h -1 , the weight ratio of monoethanolamine, diethanolamine and triethanolamine in the product is 44.4:34.2:21.4.

Embodiment 3

[0023] The fixed-bed reactor is filled with a binder-free hydrogen type ZSM-5 zeolite molecular sieve catalyst, the zeolite grain size is 200-300 nanometers, silicon-alumina (SiO 2 / Al 2 o 3 ) molar ratio is 15, under the condition that the reaction pressure is 4MPa and the reaction temperature is 50°C, feed anhydrous ammonia and ethylene oxide to react, wherein the ammonia / ethylene oxide molecular molar ratio is 6.9, epoxy The feed gravimetric space velocity of ethane is 0.1h -1 , the weight ratio of monoethanolamine, diethanolamine and triethanolamine in the product is 41.9:37.0:21.1.

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Abstract

The present invention relates to a triethanolamine production method mainly solving the technical problems of low triethanolamine yield and high byproduct yield of ethanolamine production technology in the prior art, ethylene oxide and ammonia as raw materials are contacted with a catalyst for reaction in a fixed bed reactor under pressurizing and heating conditions, the catalyst adopts a zeolite molecular sieve with the silicon aluminum molecular molar ratio (SiO2 / Al2O3) of 15 to 100, by the technical scheme, the problem is well solved, and the method can be applied to triethanolamine industrial production.

Description

technical field [0001] The present invention relates to the method for producing triethanolamine. Background technique [0002] Ethanolamine (abbreviation: EA) is the general term for the products in which the hydrogen atoms in ammonia are replaced by one, two or three hydroxyethanols. They are monoethanolamine (abbreviation: MEA), diethanolamine (abbreviation: DEA) and triethanolamine ( Abbreviation: TEA), they are one of the important downstream products of organic chemical raw material ethylene oxide (abbreviation: EO). In recent years, ethanolamine has played an increasingly important application value in secondary oil recovery, gas purification and pharmaceutical intermediates. As an important downstream product of EO, the market demand for ethanolamine is growing rapidly. [0003] Ethanolamine is mainly produced by the ammonia water method, that is, ammonia water and EO undergo a liquid phase reaction. Since the hydrogen-forming ability and polar nature of water are ...

Claims

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Application Information

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IPC IPC(8): C07C215/12C07C213/04B01J29/40
Inventor 王德举刘仲能王辉刘师前
Owner CHINA PETROLEUM & CHEM CORP
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