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Method for yield increasing of monoethanolamine (MEA) and diethanol amine (DEA)

A technology of diethanolamine and ethanolamine, applied in chemical instruments and methods, preparation of organic compounds, preparation of aminohydroxyl compounds, etc., can solve the problems of high energy consumption and high cost

Active Publication Date: 2019-12-20
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to produce monoethanolamine and diethanolamine by-product triethanolamine, separate and convert triethanolamine to monoethanolamine and diethanolamine in the prior art, which consumes a lot of energy and costs high, and provides a method for increasing the production of monoethanolamine and diethanolamine The method has the advantages of high conversion rate of EO, high overall selectivity of monoethanolamine and diethanolamine and low selectivity of by-product triethanolamine, and reduces the energy consumption of separating and converting triethanolamine to monoethanolamine and diethanolamine

Method used

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  • Method for yield increasing of monoethanolamine (MEA) and diethanol amine (DEA)

Examples

Experimental program
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Effect test

Embodiment 1

[0056] 1. Molecular sieve preparation

[0057] 40w% silica sol, sodium metaaluminate, tetrapropylammonium bromide (TPABr), sodium chloride, sodium hydroxide and water were mixed successively, stirred for 180 minutes, put into a reaction kettle, and dynamically (200 rpm minutes) crystallized for 72 hours. The crystallized product was quenched, filtered, washed with water until the pH value was 7, and dried at 120°C for 12 hours to obtain the original ZSM-5 molecular sieve powder. The molar ratio of each raw material in the reaction mixture is: SiO 2 / Al 2 o 3 =50,H 2 O / SiO 2 =25.83, NaCl / SiO 2 =0.68, NaOH / SiO 2 =0.15, TPABr / SiO 2 = 0.40.

[0058] The prepared ZSM-5 molecular sieve powder was mixed with 0.2mol L -1 Soak in ammonium nitrate solution with a solid-to-liquid ratio of 1:15, stir under heating at 90°C for 2 hours, then suction filter and wash. This process was repeated three times, and the obtained sample was dried at 120° C. for 6 hours, and finally calcin...

Embodiment 2

[0069] 1. Molecular sieve preparation

[0070] 40w% silica sol, sodium metaaluminate, tetrapropylammonium bromide (TPABr), sodium chloride, sodium hydroxide and water were mixed in turn, stirred for 180 minutes, put into a reaction kettle, and dynamic (200 rpm minutes) crystallized for 72 hours. The crystallized product was quenched, filtered, washed with water until the pH value was 7, and dried at 120°C for 12 hours to obtain the original ZSM-5 molecular sieve powder. The molar ratio of each raw material in the reaction mixture is: SiO 2 / Al 2 o 3 =50,H 2 O / SiO 2 =25.83, NaCl / SiO 2 =0.68, NaOH / SiO 2 =0.15, TPABr / SiO 2 = 0.40.

[0071]The prepared ZSM-5 molecular sieve powder was mixed with 0.2mol L -1 Soak in ammonium nitrate solution with a solid-to-liquid ratio of 1:15, stir under heating at 90°C for 2 hours, then suction filter and wash. This process was repeated three times, and the obtained sample was dried at 120° C. for 6 hours, and finally calcined at 550°...

Embodiment 3

[0082] 1. Molecular sieve preparation

[0083] 40w% silica sol, sodium metaaluminate, tetrapropylammonium bromide (TPABr), sodium chloride, sodium hydroxide and water were mixed in turn, stirred for 180 minutes, put into a reaction kettle, and dynamic (200 rpm minutes) crystallized for 72 hours. The crystallized product was quenched, filtered, washed with water until the pH value was 7, and dried at 120°C for 12 hours to obtain the original ZSM-5 molecular sieve powder. The molar ratio of each raw material in the reaction mixture is: SiO 2 / Al 2 o 3 =50,H 2 O / SiO 2 =25.83, NaCl / SiO 2 =0.68, NaOH / SiO 2 =0.15, TPABr / SiO 2 = 0.40.

[0084] The prepared ZSM-5 molecular sieve powder was mixed with 0.2mol L -1 Soak in ammonium nitrate solution with a solid-to-liquid ratio of 1:15, stir under heating at 90°C for 2 hours, then suction filter and wash. This process was repeated three times, and the obtained sample was dried at 120° C. for 6 hours, and finally calcined at 550...

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Abstract

The invention relates to a method for yield increasing of monoethanolamine (MEA) and diethanol amine (DEA). The problems that in the former technology, a triethanolamine (TEA) byproduct is produced during production of the MEA and the DEA, and energy consumption for product separation is large are mainly solved. By adopting the technical scheme that a method for synthesizing the MEA and the DEA isadopted, in the presence of a catalyst, EO reacts with NH3 to generate the MEA and the DEA, the catalyst comprises a ZSM-5 molecular sieve and molecular sieve modified elements, and the modified elements comprise La and Ni, the problems are well solved, and the method can be used for industrial production of the MEA and the DEA.

Description

technical field [0001] The present invention relates to a method for increasing the production of monoethanolamine and diethanolamine. Background technique [0002] Ethanolamine (EA) is the general term for the products in which the hydrogen atoms in the ammonia molecule are replaced by one, two or three hydroxyethanols, respectively called monoethanolamine (MEA), diethanolamine (DEA) and triethanolamine (TEA). The ethanolamine compound contains two functional groups: hydroxyl group and amine group, so it has some chemical properties and new properties of alcohol and amine compounds. The characteristics and interactions of the two functional groups make it an important organic intermediate and chemical end product with a wide range of uses. One of the uses of ethanolamine is to produce important basic raw materials for products such as surfactants, medicines, polyurethane additives, rubber processing additives, and antifreeze additives. [0003] At present, foreign compani...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C215/12C07C215/08C07C213/04B01J29/40B01J29/46
CPCB01J29/405B01J29/46C07C213/04C07C215/08C07C215/12
Inventor 刘师前王德举钱斌韩亚梅
Owner CHINA PETROLEUM & CHEM CORP
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