The production method of isopropanolamine

A technology of isopropanolamine and production method, applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc., can solve problems such as the influence of product purity, reduce the probability of polymerization, reduce energy consumption, and improve product quality Effect

Active Publication Date: 2021-12-28
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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  • The production method of isopropanolamine
  • The production method of isopropanolamine
  • The production method of isopropanolamine

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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PUM

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Abstract

The invention relates to a method for producing isopropanolamine, which mainly solves the problems in the prior art that use water as a catalyst and adopt a long tubular reactor, resulting in high equipment investment, large floor area, high energy consumption for dehydration, and many by-products. . The method adopts a tubular fixed-bed reactor and an adiabatic tubular reactor to ensure complete conversion of propylene oxide. The tubular fixed-bed reactor uses anhydrous liquid ammonia and propylene oxide as reaction raw materials, and the adiabatic tubular reactor Using high-concentration ammonia water and propylene oxide as raw materials, the tubular fixed-bed reactor removes heat through circulating hot water, and the hot water is used to preheat the raw materials and the reaction products after decompression to recover the reaction heat, and the reaction products are sequentially Ammonia and water are recovered through the ammonia recovery tower and the dehydration tower, and the top gas of the dehydration tower is used to preheat the decompressed reaction raw materials to reduce the energy consumption of the device. The method has less by-products, can reduce equipment investment and device energy consumption, and can be applied to the 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 Patents(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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