Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of continuous preparation method of triisopropanolamine

A technology of triisopropanolamine and isopropanolamine, which is applied in the preparation of organic compounds, chemical instruments and methods, and the preparation of amino hydroxyl compounds, etc., can solve the problems of large footprint, environmental pollution, etc., and achieve fast reaction speed , high efficiency effect

Active Publication Date: 2022-04-19
NANJING BAOCHUN CHEMICAL INDUSTRY CO LTD
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When nitrogen is blown off, it is easy to entrain unreacted ammonia, PO and a small amount of reaction liquid, causing environmental pollution
The process adopts an external circulation spray reactor and a secondary water spray packing tail gas absorption tower, and the equipment occupies a large area

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of continuous preparation method of triisopropanolamine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The preparation of 1# triisopropanolamine:

[0045] The alkanolamine raw material pump sends the mixed isopropanolamine metered by the alkanolamine flowmeter into the heater, and then enters the receiving tank through the tubular reactor. When the mixed isopropanolamine enters the receiving tank from the tubular reactor While in the tank, start the heater to heat the mixed isopropanolamine. The mixed isopropanolamine consists of 55 wt% monoisopropanolamine, 40 wt% diisopropanolamine and 5 wt% triisopropanolamine.

[0046] When the temperature of the mixed isopropanolamine discharged from the heater reaches 40-50°C, inject PO directly into the tubular reactor, and mix with the mixed isopropanolamine at 70-85°C and 0-0.5Mpa. The reaction is carried out to generate a reaction mixture. In this embodiment, PO is pumped into the tubular heat exchanger through the first branch pipe and the second branch pipe, that is, PO is fed into the tubular reactor by means of two-point ...

Embodiment 2

[0053] The preparation of 2# triisopropanolamine:

[0054] The alcohol amine raw material pump sends monoisopropanolamine with a purity of 99.9wt% and a moisture content of 0.1wt% measured by the alcoholamine flowmeter into the heater, and then enters the receiving tank through the tubular reactor. When mixing isopropanol When the amine enters the receiving tank from the tubular reactor, the heater is started to heat the monoisopropanolamine. The monoisopropanolamine in this example contains isomers.

[0055] When the temperature of monoisopropanolamine discharged from the heater reaches 40-50°C, inject PO directly into the tubular reactor, The reaction is carried out to form a reaction mixture. In this embodiment, the epoxy raw material is pumped into the tubular heat exchanger through the first branch pipe and the second branch pipe, that is, the PO enters the tubular reactor by means of two-point feeding.

[0056] The molar ratio of PO entering the tubular reactor to the...

Embodiment 3

[0061] The diisopropanolamine with a purity of 99.9% and a moisture content of 0.1% is sent into the heater through the olamine flow meter and the olamine raw material pump, and then enters the receiving tank through the tubular reactor. When the tubular reactor begins to enter the receiving tank, start the heater to heat the diisopropanolamine. Diisopropanolamine in this example contains isomers.

[0062] When the temperature of diisopropanolamine discharged from the heater reaches 40-50°C, inject PO directly into the tubular reactor, and diisopropanolamine at 70-80°C and 0-0.4Mpa The reaction is carried out to generate a reaction mixture. In this embodiment, the epoxy raw material is pumped into the tubular heat exchanger through the first branch pipe, that is, the PO enters the tubular reactor in a single-point feeding manner.

[0063] The molar ratio of PO entering the tubular reactor to the number of hydrogen atoms on nitrogen atoms in diisoalcopropanolamine is 0.9:1. ...

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

No PUM Login to View More

Abstract

The invention discloses a continuous preparation method of triisopropanolamine. The steps are as follows: (1) the alcohol amine material enters a tubular reactor after passing through a heater; (2) when the alcohol amine material enters from the tubular reactor When reaching the receiving tank, start the heater to heat the alcohol amine material; (3) when the temperature of the alcohol amine material discharged from the heater reaches the first set temperature, PO is injected into the tubular reactor, Generate the reaction mixture; (4) the reaction mixture enters the receiving tank; (5) send the reaction mixture in the receiving tank into the refilling tank, add PO to the refilling tank, and react; The material in the tank is put into circulation; after the cycle time is reached, the material is discharged; (6) stop. In this application, the combination of continuous production and batch production takes advantage of the advantages of the two, reduces the problem of large footprint of the production device during pure batch production, and cancels vacuuming, nitrogen replacement and purging, etc. process to increase production efficiency.

Description

technical field [0001] The invention relates to an organic preparation method, in particular to a continuous preparation method of triisopropanolamine. Background technique [0002] Triisopropanolamine is mainly used in cement grinding aids. It has the functions of early strength, dispersion, and fluidity improvement. It can also be used as polyether initiators, metal cutting fluids, surfactants, tanning agents, and textile auxiliaries. , printing and dyeing auxiliaries, rust inhibitors, etc. [0003] At present, the preparation process of triisopropanolamine has two kinds of tubular reaction continuous method and kettle reaction batch method. The latter has less equipment investment and is widely used. The raw materials are ammonia water and propylene oxide (PO for short). During intermittent production, a small amount of unreacted ammonia and PO are discharged into the atmosphere and waste water, causing environmental pollution; in addition, the reactor also has the disad...

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
IPC IPC(8): C07C213/04C07C215/12
CPCC07C213/04C07C215/12
Inventor 张书杭建荣张小燕胡小志
Owner NANJING BAOCHUN CHEMICAL INDUSTRY CO LTD