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Isopropanolamine production method

A technology of isopropanolamine and its production method, which is applied in chemical instruments and methods, preparation of organic compounds, chemical industry, etc., and can solve problems such as the influence of product purity

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

However, the process still uses water as a catalyst, and the side reactions of (4) and (5) still exist, and the product purity is still affected to a certain extent.

Method used

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  • Isopropanolamine production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Fresh liquid ammonia feed 2 is mixed with circulating liquid ammonia 9 and sent to E-101. After being preheated by circulating hot water in reactor R-101, liquid ammonia feed 4 is mixed with propylene oxide feed 1 and sent to R-101 , to obtain the primary reaction product flow 5, after mixing with fresh water 3 and circulating ammonia water 14, send it to R-102, the outlet of R-102 is decompressed, and the depressurized reaction product 6 is first preheated in E-103 by circulating hot water , 7 is sent to E-104, after 11 preheating, 8 is sent to ammonia recovery tower T-101, the top of T-101 gets circulating liquid ammonia 9 returns to E-101, and the tower kettle gets isopropanolamine containing water and a small amount of ammonia 10 and 10 are sent to the dehydration tower T-102, and after the dehydration tower top gas 11 is condensed in E-104 and E-105, part of it returns to the top of the dehydration tower T-102 as the dehydration tower reflux 13, and part of it retur...

Embodiment 2

[0046] Fresh liquid ammonia feed 2 is mixed with circulating liquid ammonia 9 and sent to E-101. After being preheated by circulating hot water in reactor R-101, liquid ammonia feed 4 is mixed with propylene oxide feed 1 and sent to R-101 , to obtain the primary reaction product flow 5, after mixing with fresh water 3 and circulating ammonia water 14, send it to R-102, the outlet of R-102 is decompressed, and the depressurized reaction product 6 is first preheated in E-103 by circulating hot water , 7 is sent to E-104, after 11 preheating, 8 is sent to ammonia recovery tower T-101, the top of T-101 gets circulating liquid ammonia 9 returns to E-101, and the tower kettle gets isopropanolamine containing water and a small amount of ammonia 10 and 10 are sent to the dehydration tower T-102, and after the dehydration tower top gas 11 is condensed in E-104 and E-105, part of it returns to the top of the dehydration tower T-102 as the dehydration tower reflux 13, and part of it retur...

Embodiment 3

[0055] Fresh liquid ammonia feed 2 is mixed with circulating liquid ammonia 9 and sent to E-101. After being preheated by circulating hot water in reactor R-101, liquid ammonia feed 4 is mixed with propylene oxide feed 1 and sent to R-101 , to obtain the primary reaction product flow 5, after mixing with fresh water 3 and circulating ammonia water 14, send it to R-102, the outlet of R-102 is decompressed, and the depressurized reaction product 6 is first preheated in E-103 by circulating hot water , 7 is sent to E-104, after 11 preheating, 8 is sent to ammonia recovery tower T-101, the top of T-101 gets circulating liquid ammonia 9 returns to E-101, and the tower kettle gets isopropanolamine containing water and a small amount of ammonia 10 and 10 are sent to the dehydration tower T-102, and after the dehydration tower top gas 11 is condensed in E-104 and E-105, part of it returns to the top of the dehydration tower T-102 as the dehydration tower reflux 13, and part of it retur...

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Abstract

The invention relates to an isopropanolamine production method and mainly solves problems of high device investment, large floor space, high dewatering energy consumption, large quantity of byproductsand the like in use of a long tube reactor with water serving as a catalyst in the prior art. The isopropanolamine production method is characterized in that a tubular fixed-bed reactor and a heat insulating tube reactor are adopted to guarantee complete conversion of epoxypropane; anhydrous liquid ammonia and epoxypropane are used as reaction raw materials in the tubular fixed-bed reactor, and high-concentration ammonium hydroxide and epoxypropane are used as raw materials in the heat insulating tube reactor; in the tubular fixed-bed reactor, by circulating hot water heat removal, heat removal hot water is used for preheating raw materials and pressure-reduced reaction products to realize reaction heat recovery, the reaction products sequentially passes through an ammonia recovery towerand a dewatering tower to recover ammonia and water, and overhead gas of the dewatering tower is used for preheating pressure-reduced reaction raw materials to reduce energy consumption. The method islow in byproduct quantity, equipment investment and device energy consumption can be reduced, and the method can be applied to industrial production of isopropanolamine.

Description

technical field [0001] The invention relates to a method for producing isopropanolamine, in particular to a method for producing isopropanolamine with high-concentration ammonia water and propylene oxide as raw materials. 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, printing and dyeing softeners, soaps, cosmetics, rust inhibitors, metal cu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C213/04C07C215/08C07C215/12C07C213/10
CPCY02P20/50
Inventor 李晗胡松杨卫胜
Owner CHINA PETROLEUM & CHEM CORP
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