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Zeolite catalyst for producing ethanolamine and preparation method thereof

A technology of molecular sieve and catalyst, which is applied in the field of molecular sieve catalyst and its preparation, can solve the problems of low conversion rate of ethylene oxide and low selectivity of product ethanolamine, and achieve the effect of weakening the degree of etherification reaction, good acidity distribution and simple regeneration

Active Publication Date: 2012-10-10
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] One of the technical problems to be solved by the present invention is that the conversion rate of ethylene oxide in the process of preparing ethanolamine is low in the prior art, and the selectivity of the product ethanolamine is low. A new molecular sieve for the production of ethanolamine is provided catalyst

Method used

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  • Zeolite catalyst for producing ethanolamine and preparation method thereof
  • Zeolite catalyst for producing ethanolamine and preparation method thereof
  • Zeolite catalyst for producing ethanolamine and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Mix 187g of silica sol with 200mL of deionized water, stir at room temperature for 10 minutes, then measure 5.6mL of ethylenediamine into the above mixed solution, and stir at room temperature for 0.5 hours; 2 / Al 2 o 3 The ratio of =25 (molar ratio) weighs Al 2 (SO 4 ) 3 18H 2 O, added to the above mixed solution, and vigorously stirred for 0.5 hours, a white viscous colloid will be obtained. Add 8g of NaOH to the body colloid, adjust the pH value of the system to 13-14, and continue to stir for 1 hour, then transfer to a crystallization tank, and keep the temperature at 180°C for 36 hours. The crystallized product was washed with deionized water, and dried at 100°C. The dried molecular sieve was placed in a muffle furnace and calcined in an air atmosphere. The temperature was raised to 600°C at a rate of °C / min, and calcined at this temperature for 6 hours, thereby obtaining the molecular sieve precursor I. The molecular sieve precursor I was placed in a cycloh...

Embodiment 2～15

[0015] According to the various steps and conditions obtained in Example 1 to prepare the catalyst and evaluate the catalyst, it is only to change the synthesis conditions such as the type of raw materials, crystallization conditions, roasting conditions, raw material ratios, surface treatment and catalyst molding factors, and list the synthesis conditions. In Table 1; under the same evaluation conditions, the catalysts obtained by different synthesis methods are evaluated, and the evaluation results are listed in Table 2.

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Abstract

The invention relates to a zeolite catalyst for producing ethanolamine and a preparation method thereof, in order to solve the technical problems of low conversion rate of epoxy ethane and low selectivity of ethanolamine in the prior art. The zeolite catalyst comprises the following components in part by weight: 40 to 100 parts of ZSM-5 zeolite, wherein the mol ratio of SiO2 to Al2O3 of the ZSM-5zeolite is 10 to 500 and the particle diameter of the ZSM-5 zeolite is 1 to 5 mu m, and 0 to 60 parts of binder. In the process of preparing the catalyst, the ZSM-5 zeolite is subjected to surface modification by tetraethyl orthosilicate to form the catalyst. The invention also relates to a corresponding technical scheme of the preparation method. The technical scheme can better solve the problemand can be applied to the industrial production of ethanolamine.

Description

technical field [0001] The invention relates to a molecular sieve catalyst for producing ethanolamine and a preparation method thereof. Background technique [0002] Ethanolamine compounds include monoethanolamine (MEA), diethanolamine (DEA) and triethanolamine (TEA). Since the terminal groups of ethanolamine compounds are hydroxyl and amine groups respectively, they have the chemical properties of alcohol and amine compounds. The dual functional groups make it an important organic intermediate with a wide range of uses. Ethanolamine is an important basic raw material for the production of surfactants, pharmaceuticals, polyurethane additives, rubber processing additives, antifreeze additives and other products. At present, the production of ethanolamine mainly adopts the ethylene oxide ammonolysis method. Since Knorr (Knorr L.Chem.Bev., 1897, 30:909-911; Chem.Bev., 1899, 32:729-731) first discovered the synthesis of ethanolamine with ammonia, the research on the synthesis ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/40B01J31/02B01J37/08C07C213/02C07C215/08C07C215/10
Inventor 冯汝明刘仲能谢在库王德举汪哲明
Owner CHINA PETROLEUM & CHEM CORP
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