Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for joint production of isopropanolamine

A technology of isopropanolamine and joint production, which is applied in the field of chemical building materials, can solve the problems of low production efficiency, environmental protection, and high DEA ​​price, and achieve the effects of high production efficiency, environmental protection, and convenient adjustment

Active Publication Date: 2014-07-23
安徽海螺材料科技股份有限公司
View PDF6 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has the following problems: 1) DEA has a melting point of 28°C and is solid at room temperature. It needs a special drying room to heat and melt it before pumping it into the reactor. It is cumbersome to use and the production efficiency is not high; 2) DEA It is a by-product of the production of triethanolamine (TEA for short). After the rectification of mixed amines to separate monoethanolamine, and then to continue the rectification to separate DEA, DEA and TEA are obtained respectively. The high price of DEA leads to high production costs.
3) When DEA reacts with PO in equimolar ratio, DEA and PO will remain, and vacuum distillation will produce waste with low boiling point and high boiling point, which will bring environmental protection pressure to enterprises
The high-efficiency cement grinding aid produced by this method is a mixture of DEIPA, TIPA, monoethanol diisopropanolamine (EDIPA for short) and propylene glycol, etc., and these four ingredients have inconsistent effects on cement grinding and strengthening, and DEIPA can improve Early and late strength, TIPA and EDIPA can only improve the late strength, propylene glycol only has a grinding aid effect, and the materials, processes, and market demand of each cement company are different, which is not conducive to the adjustment of the cement grinding aid formula, and cannot be adjusted freely Grinding aid formula, even causing unnecessary waste
[0006] In order to overcome the disadvantages of environmental protection, low production efficiency, poor economic benefits, and difficult adjustment of grinding aid formula in the above-mentioned prior art, the inventor of the present invention provides a method for joint production of isopropanolamine

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Add 3000kg of water to reactor 1, feed 2800kg of liquid ammonia to make an ammonia solution with a content of 48.3%, open reactor 1, continuously add 3180kg of PO, control the temperature at 60-90°C, and control the pressure at 0.1-0.3MPa. After adding PO dropwise, continue the reaction until the pressure no longer drops, and obtain 8980kg intermediate product, which contains 12.5% ​​MIPA, 25.3% DIPA, 4.1% TIPA, 24.7% ammonia, and 33.4% water. The intermediate product is transferred to the vacuum rectification tower, and the 5222kg content of the overhead distillate is that 42.6% ammonia recovery liquid is returned to the reactor 1 for reuse, and the side stream distills 1126kgMIPA, and the bottom of the tower is 2631kg high boiling point substance containing 86.2%DIPA and 13.8%TIPA . Add MIPA into reactor 2, open reactor 2, continuously add 1315kg EO, control the temperature at 50-75°C, and control the pressure at 0.1-0.2MPa. After the dropwise addition of EO, continu...

Embodiment 2

[0033] Add 3000kg of water to reactor 1, feed 2800kg of liquid ammonia to make an ammonia solution with a content of 48.3%, open reactor 1, continuously add 1910kg of PO, control the temperature at 60-90°C, and control the pressure at 0.1-0.3MPa. After adding PO dropwise, continue the reaction until the pressure no longer drops, and obtain 7710kg of intermediate product, which contains 12.4% MIPA, 15.8% DIPA, 1.5% TIPA, 31.4% ammonia, and 38.9% water. The intermediate product is transferred to the vacuum rectification tower, and the 5417kg content of the overhead distillate is that 44.6% ammonia recovery liquid is returned to the reactor 1 for reuse, and the side stream distills 954kgMIPA, and the bottom of the tower is 1338kg of high boiling point substances containing 91.1%DIPA and 8.9%TIPA . Add MIPA into reactor 2, open reactor 2, continuously add 1114kg EO, control the temperature at 50-75°C, and control the pressure at 0.1-0.2MPa. After adding EO dropwise, continue the re...

Embodiment 3

[0035] Add 3000kg of water to reactor 1, feed 2800kg of liquid ammonia to make an ammonia solution with a content of 48.3%, open reactor 1, continuously add 1364kg of PO, control the temperature at 60-90°C, and control the pressure at 0.1-0.3MPa. After adding PO dropwise, continue the reaction until the pressure no longer drops, and obtain 7164kg intermediate product, which contains 11.4% MIPA, 10.9% DIPA, 0.8% TIPA, 35.0% ammonia, and 41.9% water. The intermediate product is transferred to the vacuum rectification tower, and the content of 5509kg in the top of the tower is 45.5% Ammonia recovery liquid is returned to the reactor 1 for reuse, 820kgMIPA in the side stream, and 834kg of high boiling point substances in the bottom of the tower contain 93.3%DIPA and 6.7%TIPA . Add MIPA to reactor 2, open reactor 2, continuously add 957kg EO, control the temperature at 50-75°C, and control the pressure at 0.1-0.2MPa. After the dropwise addition of EO, continue the reaction until t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
melting pointaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the field of chemical building materials and relates to a method for joint production of DEIPA (diethanolisopropanolamine) and TIPA (triisopropanolamine). The method has the characteristics that the industrialized production is environmentally friendly, the production efficiency is high, the economic benefit is relatively good and a grinding aid formula is convenient to adjust. The method comprises the following steps: A, continuously adding PO (propylene oxide) into an ammonia water solution in a reactor 1, controlling the reaction temperature and the pressure, and reacting until an intermediate product is obtained; B, transferring the intermediate product obtained in the step A to a reduced pressure distillation tower, distilling off an ammonia water recovery solution from the top of the tower and MIPA (monoisopropanolamine) from a side line, and collecting high-boiling-point substances from the bottom of the tower; C, adding MIPA obtained in the step B into a reactor 2, continuously adding EO (ethylene oxide), controlling the reaction temperature and the pressure, and reacting until DEIPA is obtained; adding the high-boiling-point substances at the bottom of the tower obtained in the step B into a reactor 3, continuously adding PO, controlling the reaction temperature and the pressure, and reacting until TIPA is obtained.

Description

technical field [0001] The invention belongs to the field of chemical building materials and relates to a method for producing isopropanolamine, in particular to a method for jointly producing diethanol monoisopropanolamine (DEIPA for short) and triisopropanolamine (TIPA for short). DEIPA and TIPA can be used as Cement grinding aid. Background technique [0002] Grinding aids are additives used in the cement grinding process, which can improve the grinding efficiency. DEIPA and TIPA are the main components of cement grinding aids. Adding DEIPA and TIPA to grinding aids can greatly improve cement grinding efficiency. late strength. [0003] Patent CN1629134 discloses a method for preparing TIPA by using liquid ammonia and propylene oxide (referred to as PO) as raw materials, wherein the liquid ammonia:PO molar ratio is 1:3.00-3.05, and there is unreacted PO in the crude product in this method. During the treatment, the crude product is subjected to vacuum distillation and ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C07C215/12C07C213/04
Inventor 曾君张大康冯方波明金龙
Owner 安徽海螺材料科技股份有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com