Method of producing ethanolamine from liquid ammonia

A technology of ethanolamine and liquid ammonia, applied in chemical instruments and methods, preparation of organic compounds, preparation of amino hydroxyl compounds, etc., can solve the problems of many by-products, high equipment investment, low safety, etc., and achieve product purity and easy separation , the reaction temperature is controllable, and the effect of avoiding safety accidents and equipment failures

Active Publication Date: 2015-04-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The technical problems to be solved by the present invention are technical problems such as many product by-products, low safety, high equipment investment and high energy consumption in the prior art, and a new method for producing ethanolamine by liquid ammonia method is provided

Method used

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  • Method of producing ethanolamine from liquid ammonia
  • Method of producing ethanolamine from liquid ammonia
  • Method of producing ethanolamine from liquid ammonia

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Ethylene oxide and fresh liquid ammonia enter the tube-and-tube fixed-bed reactor through the feed pump respectively, and the reaction products enter the adiabatic fixed-bed reactor. Both the tube-and-tube fixed-bed reactor and the adiabatic fixed-bed reactor are filled with Binder ZSM-5 zeolite molecular sieve catalyst.

[0024] Fresh liquid ammonia is divided into stream Ⅰ and stream Ⅱ. Stream Ⅰ enters the tubular fixed-bed reactor after being preheated and mixed with ethylene oxide, and stream Ⅱ directly enters the adiabatic fixed-bed reactor. In the shell-and-tube fixed-bed reactor, the circulating hot water in the shell side and the reaction materials in the tube side flow in the same direction, and the heat of reaction is continuously withdrawn. The circulating hot water exits the tubular fixed-bed reactor and passes through the circulation pump to exchange heat with stream I, and then enters the tubular fixed-bed reactor after being cooled by the cooler.

[0025...

Embodiment 2

[0034] Ethylene oxide and fresh liquid ammonia enter the tube-and-tube fixed-bed reactor through the feed pump respectively, and the reaction products enter the adiabatic fixed-bed reactor. Both the tube-and-tube fixed-bed reactor and the adiabatic fixed-bed reactor are filled with Binder ZSM-5 zeolite molecular sieve catalyst.

[0035] Fresh liquid ammonia is divided into stream Ⅰ and stream Ⅱ. Stream Ⅰ enters the tubular fixed-bed reactor after being preheated and mixed with ethylene oxide, and stream Ⅱ directly enters the adiabatic fixed-bed reactor. In the shell-and-tube fixed-bed reactor, the circulating hot water in the shell side and the reaction materials in the tube side flow in the same direction, and the heat of reaction is continuously withdrawn. The circulating hot water exits the tubular fixed-bed reactor and passes through the circulation pump to exchange heat with stream I, and then enters the tubular fixed-bed reactor after being cooled by the cooler.

[0036...

Embodiment 3

[0045] Ethylene oxide and fresh liquid ammonia enter the tube-and-tube fixed-bed reactor through the feed pump respectively, and the reaction products enter the adiabatic fixed-bed reactor. Both the tube-and-tube fixed-bed reactor and the adiabatic fixed-bed reactor are filled with Binder ZSM-5 zeolite molecular sieve catalyst.

[0046] Fresh liquid ammonia is divided into stream Ⅰ and stream Ⅱ. Stream Ⅰ enters the tubular fixed-bed reactor after being preheated and mixed with ethylene oxide, and stream Ⅱ directly enters the adiabatic fixed-bed reactor. In the shell-and-tube fixed-bed reactor, the circulating hot water in the shell side and the reaction materials in the tube side flow in the same direction, and the heat of reaction is continuously withdrawn. The circulating hot water exits the tubular fixed-bed reactor and passes through the circulation pump to exchange heat with stream I, and then enters the tubular fixed-bed reactor after being cooled by the cooler.

[0047...

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Abstract

The invention relates to a method of producing ethanolamine from liquid ammonia and mainly aims to solve the technical problems of a large amount of byproducts, low security, high investment in equipment and high energy consumption in the prior art. According to the technical scheme, ethylene oxide and fresh liquid ammonia are respectively added into a tubular fixed-bed reactor by a feeding pump, the product of reaction is added into an adiabatic fixed-bed reactor, and the tubular fixed-bed reactor and the adiabatic fixed-bed reactor are both filled with a binder-free ZSM-5 zeolite molecular sieve catalyst so as to catalyze ammoniation to generate ammonia-containing ethanolamine. By adopting the technical scheme, the problems can be well solved. The method provided by the invention can be applied to the industrial production of ethanolamine.

Description

Technical field [0001] The invention relates to the field of ethanolamine production. Specifically, it relates to a method for producing ethanolamine using liquid ammonia (anhydrous) and ethylene oxide as raw materials under the catalysis of a binder-free ZSM-5 zeolite molecular sieve catalyst. Background technique [0002] In recent years, ethanolamine has played an increasingly important role in secondary oil recovery, gas purification, and pharmaceutical intermediates. As an important downstream product of ethylene oxide (EO), the average annual growth rate of global demand for ethanolamine will remain at 4-5% in the next 5 to 10 years, and the growth rate of domestic ethanolamine market demand will exceed this average growth rate. Therefore, EO-catalyzed ammoniation to synthesize ethanolamine and its downstream products have broad development space and technological development value in the future petrochemical industry. At present, the relevant foreign companies engage...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C215/12C07C213/04
Inventor 胡松杨卫胜黄云群何志李向勇
Owner CHINA PETROLEUM & CHEM CORP
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