Method for producing isopropanolamine by liquid ammonia process

A technology of isopropanolamine and liquid ammonia, applied in chemical instruments and methods, preparation of organic compounds, preparation of aminohydroxy compounds, etc., can solve the problems of high equipment investment, high product by-products, and high dehydration energy consumption, and achieve the reaction The effect of temperature controllable, adjustable product structure and convenient heat removal

Active Publication Date: 2019-05-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The technical problem to be solved by the present invention is that water is used as a catalyst in the prior art, which leads to problems such as high equipment investment, high dehydration energy consumption, and many by-products. A new liquid ammonia method is provided to produce isopropanolamine The method, the technical scheme that the present invention takes is as follows: a kind of method for producing isopropanolamine by liquid ammonia method, comprises the following steps:

Method used

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  • Method for producing isopropanolamine by liquid ammonia process
  • Method for producing isopropanolamine by liquid ammonia process
  • Method for producing isopropanolamine by liquid ammonia process

Examples

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Embodiment 1

[0045] Fresh liquid ammonia 2 is mixed with condensed liquid ammonia 9 and compressed condensed liquid ammonia 16 to form liquid ammonia feed 3, which is mixed with propylene oxide feed 1 after preheating and sent to the tubular fixed bed reactor R-101, the first stage The reaction product 5 enters the adiabatic fixed-bed reactor R-102, and both R-101 and R-102 are filled with a binder-free ZSM-5 zeolite molecular sieve catalyst. After preheating, it is sent to the flash tank D-101. The top stream 8 of D-101 is condensed and then circulated to the reaction unit. The bottom stream 10 is sent to the ammonia stripper T-101. The top stream 11 of T-101 is condensed by three stages of compression. Stream 16 is recycled to the reaction unit, and there is also a gas-liquid separation tank D-102 and D-103 between the primary compression and the secondary compression, the secondary compression and the tertiary compression, and the liquid phase of D-102 and D-103 The output stream 13 and...

Embodiment 2

[0054] Fresh liquid ammonia 2 is mixed with condensed liquid ammonia 9 and compressed condensed liquid ammonia 16 to form liquid ammonia feed 3, which is mixed with propylene oxide feed 1 after preheating and sent to the tubular fixed bed reactor R-101, the first stage The reaction product 5 enters the adiabatic fixed-bed reactor R-102, and both R-101 and R-102 are filled with a binder-free ZSM-5 zeolite molecular sieve catalyst. After preheating, it is sent to the flash tank D-101. The top stream 8 of D-101 is condensed and then circulated to the reaction unit. The bottom stream 10 is sent to the ammonia stripper T-101. The top stream 11 of T-101 is condensed by three stages of compression. Stream 16 is recycled to the reaction unit, and there is also a gas-liquid separation tank D-102 and D-103 between the primary compression and the secondary compression, the secondary compression and the tertiary compression, and the liquid phase of D-102 and D-103 The output stream 13 and...

Embodiment 3

[0063] Fresh liquid ammonia 2 is mixed with condensed liquid ammonia 9 and compressed condensed liquid ammonia 16 to form liquid ammonia feed 3, which is mixed with propylene oxide feed 1 after preheating and sent to the tubular fixed bed reactor R-101, the first stage The reaction product 5 enters the adiabatic fixed-bed reactor R-102, and both R-101 and R-102 are filled with a binder-free ZSM-5 zeolite molecular sieve catalyst. After preheating, it is sent to the flash tank D-101. The top stream 8 of D-101 is condensed and then circulated to the reaction unit. The bottom stream 10 is sent to the ammonia stripper T-101. The top stream 11 of T-101 is condensed by three stages of compression. Stream 16 is recycled to the reaction unit, and there is also a gas-liquid separation tank D-102 and D-103 between the primary compression and the secondary compression, the secondary compression and the tertiary compression, and the liquid phase of D-102 and D-103 The output stream 13 and...

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Abstract

The invention relates to a method for producing isopropanolamine by a liquid ammonia process, mainly solving the problems such as high device investment, high energy consumption in dehydration and many by-products due to the fact that water is used as a catalyst in the prior art. The method has the advantages that anhydrous liquid ammonia and propylene oxide are used as raw materials for reaction,a tubular fixed bed reactor and an adiabatic fixed bed reactor are provided to ensure complete conversion of the propylene oxide, and the tubular fixed bed reactor removes heat of the hot water preheated reaction raw materials and reaction products under reduced pressure through heat removal of circulating hot water, so that most of reaction heat can be recycled; most of ammonia of the reaction products is recycled through a flash tank, and residual ammonia is recycled by an ammonia stripping tower with an compressor at the top; few by-products are generated, equipment investment and device energy consumption can be reduced, and the method can be applied to industrial production of the isopropanolamine.

Description

technical field [0001] The invention relates to the field of isopropanolamine production, in particular to a method for producing isopropanolamine by using anhydrous liquid ammonia and propylene oxide as raw materials under the catalysis of a binder-free ZSM-5 zeolite molecular sieve catalyst. Background technique [0002] Isopropanolamines include monoisopropanolamine (1-amino-2-propanol, referred to as MIPA), diisopropanolamine (2,2'-dihydroxydipropylamine, referred to as DIPA) and triisopropanolamine ( 1,1,1'-nitrilotri-2-propanol, referred to as TIPA) three homologue products. Isopropanolamine is an amphoteric compound. Because it has both amino and hydroxyl groups in the molecule, it can not only carry out the typical reaction of amines, but also carry out the typical reaction of alcohols, thereby synthesizing a series of useful derivatives. These derivatives are widely used in the preparation of detergents, polyurethane crosslinking agents, textile finishing agents, p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C213/04C07C215/08C07C215/12
Inventor 胡松李晗杨卫胜
Owner CHINA PETROLEUM & CHEM CORP
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