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Process for producing ethanolamine

A technology of ethanolamine and ethylene oxide, which is applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc., can solve problems such as high content, deactivation, and reduced catalyst efficiency, and achieve low equipment investment and low concentration , The effect of saving equipment costs

Active Publication Date: 2018-11-20
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 problem to be solved by the present invention is the problem that the high content of metal ions, water and hydrocarbon impurities contained in liquid ammonia in the prior art leads to the reduction of catalyst efficiency or even deactivation, and a new method for producing ethanolamine is provided

Method used

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  • Process for producing ethanolamine
  • Process for producing ethanolamine
  • Process for producing ethanolamine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The ethylene oxide material 1 is pressurized by the ethylene oxide feed pump P-101, and the pure liquid ammonia 2 is divided into two streams (stream 4 and stream 5) after being pressurized by the liquid ammonia feed pump P-102. After exchanging heat with the circulating hot water of the tubular fixed bed reactor R-101, the stream 6 is obtained, mixed with ethylene oxide feed into the reactor R-101, and reacted under the action of the binder-free ZSM-5 catalyst, Stream 5 is mixed with stream 7 at the outlet of reactor R-101 and enters adiabatic fixed-bed reactor R-102, and reacts under the action of binder-free ZSM-5 catalyst to obtain stream 8. The fresh liquid ammonia 3 passes through the metal ion removal device S-101 to obtain the stream 9, which is mixed with the stream 8, and is exchanged with the circulating hot water of the tubular fixed bed reactor R-101 to obtain the stream 10, and the stream 10 enters the ammonia recovery Tower T-101, the top of the tower obt...

Embodiment 2

[0053] Flow process is the same as [embodiment 1], only,

[0054] The molar flow ratio of liquid ammonia feed 9 to ethylene oxide feed 1 = 8:1.

[0055] The reaction pressure of the tubular fixed bed reactor R-101 is 9MPa(A), and the outlet temperature is 84°C. The reaction pressure of the adiabatic fixed-bed reactor is 9MPa(A), and the outlet temperature is 92°C.

[0056] Circulating hot water at 80°C enters the shell side of the tubular fixed-bed reactor R-101, is heated to 84°C, and flows out from the lower part of R-101. The mixture of fresh liquid ammonia and reaction product is heated to 53.5°C, and after heat exchange, it enters the circulating hot water cooler E-102 to cool and then returns to the upper part of the tube-and-tube fixed-bed reactor R-101.

[0057] Among them, after flow and temperature matching, 36.9% of the heat of reaction in the tubular fixed bed reactor R-101 is preheated by liquid ammonia feed 4, 63.1% is preheated by fresh liquid ammonia and reac...

Embodiment 3

[0065] Flow process is the same as [embodiment 1], only,

[0066] The molar flow ratio of liquid ammonia feed 9 to ethylene oxide feed 1 = 9:1.

[0067] The reaction pressure of the tubular fixed bed reactor R-101 is 10MPa(A), and the outlet temperature is 96°C. The reaction pressure of the adiabatic fixed-bed reactor is 10MPa(A), and the outlet temperature is 103°C.

[0068] The circulating hot water enters the shell side of the tubular fixed-bed reactor R-101 at 90°C, and is heated to 92°C and flows out from the lower part of R-101. The mixture of fresh liquid ammonia and reaction product is heated to 50.1°C, after heat exchange, it enters the circulating hot water cooler E-102 to cool, and then returns to the upper part of the tube-and-tube fixed-bed reactor R-101.

[0069] Among them, after flow and temperature matching, 51.5% of the heat of reaction in the tubular fixed bed reactor R-101 is preheated by liquid ammonia feed 4, 48.5% is preheated by fresh liquid ammonia a...

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Abstract

The invention relates to a method for producing ethanolamine. The method includes steps of feeding pure liquid ammonia and ethylene oxide into a tube fixed-bed reactor at first; feeding the pure liquid ammonia and the ethylene oxide into an adiabatic fixed-bed reactor; carrying out reaction to obtain first material flow. The method is characterized by particularly comprising steps of a), providing fresh liquid ammonia and removing metal ions in the fresh liquid ammonia to obtain second material flow; b), feeding the first material flow and the second material flow into an ammonia recycling tower, acquiring the pure liquid ammonia from a tower top and acquiring ethanolamine material flow with water and hydrocarbon heavy components from a tower kettle; c), separating the ethanolamine material flow with the water and the hydrocarbon heavy components and removing the water and the hydrocarbon heavy components to obtain ethanolamine products. The method has the advantage that the method can be applied to industrially producing the ethanolamine.

Description

technical field [0001] The invention relates to a method for producing ethanolamine, in particular to a method for producing ethanolamine with anhydrous liquid ammonia and ethylene oxide as raw materials. Background technique [0002] 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 ethylene oxide (EO), the global demand for ethanolamine will maintain an average annual growth rate of 4-5% in the next 5 to 10 years, while the growth rate of domestic ethanolamine market demand will exceed this average growth rate. Therefore, the catalytic ammoniation of EO to synthesize ethanolamine and its downstream products has broad development space and technological development value in the petrochemical industry in the future. At present, foreign companies engaged in the production of ethanolamine mainly include Dow Chemical, BASF, Hunt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C215/08C07C213/04
Inventor 胡松杨卫胜
Owner CHINA PETROLEUM & CHEM CORP
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