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Preparation method of monoethanol diisopropanolamine

A technology of ethanol diisopropanolamine and diisopropanolamine, which is applied in the field of preparation of monoethanol diisopropanolamine, can solve problems such as unsatisfactory cement strength in the later stage, achieve short reaction time, high yield, and easy The effect of molecular structure

Inactive Publication Date: 2013-08-14
NINGBO LIANKAI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Triethanolamine is a very polar alcohol amine, and its aqueous solution is alkaline, which can chelate metal ions in cement and interact with minerals. It is usually compounded with polyols when used, and has a certain grinding effect on cement, and It can quickly improve the early strength of cement, but the later strength of cement is not ideal. To improve the later strength, use triisopropanolamine

Method used

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  • Preparation method of monoethanol diisopropanolamine

Examples

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Effect test

Embodiment 1

[0013] refer to figure 1 and figure 2 Shown, a kind of preparation method of monoethanol diisopropanolamine of the present invention, described monoethanol diisopropanolamine is made of diisopropanolamine (about 90% content) and oxirane in the reactor Gained after mixed reaction; its preparation steps are as follows:

[0014] a) Add 328.0 g of diisopropanolamine as a raw material into the reactor.

[0015] b) Heating the reaction kettle to a temperature of 70° C., then vacuumizing the inside of the reaction kettle, adding 88.0 g of raw material ethylene oxide in proportion, and performing a circular reaction at a temperature of 70° C. using an external circulation reactor for 5 hours to obtain Monoethanol diisopropanolamine, the yield of monoethanol diisopropanolamine is 89.7%.

[0016] c) After cooling down the monoethanol diisopropanolamine mixed solution obtained in step b), discharge and fill it.

Embodiment 2

[0018] refer to figure 1 and figure 2 Shown, a kind of preparation method of monoethanol diisopropanolamine of the present invention, described monoethanol diisopropanolamine is made of diisopropanolamine (about 90% content) and oxirane in the reactor Gained after mixed reaction; its preparation steps are as follows:

[0019] a) Add 295.6 g of raw material diisopropanolamine into the reactor.

[0020] b) Heating the reaction kettle to a temperature of 60° C., then vacuumizing the inside of the reaction kettle, adding 92.4 g of raw material ethylene oxide in proportion, and performing a circular reaction at a temperature of 60° C. using an external circulation reactor for 3 hours to obtain Monoethanol diisopropanolamine, the yield of monoethanol diisopropanolamine is 96.6%.

[0021] c) After cooling down the monoethanol diisopropanolamine mixed solution obtained in step b), discharge and fill it.

Embodiment 3

[0023] refer to figure 1 and figure 2 Shown, a kind of preparation method of monoethanol diisopropanolamine of the present invention, described monoethanol diisopropanolamine is made of diisopropanolamine (about 90% content) and oxirane in the reactor Gained after mixed reaction; its preparation steps are as follows:

[0024] a) Add 295.6 g of raw material diisopropanolamine into the reactor.

[0025] b) Heating the reaction kettle to a temperature of 65° C., then evacuating the inside of the reaction kettle, adding 114.3 g of raw material ethylene oxide in proportion, and performing a circular reaction at a temperature of 65° C. using an external circulation reactor for 2 hours to obtain Monoethanol diisopropanolamine, the yield of monoethanol diisopropanolamine is 95.8%.

[0026] c) After cooling down the monoethanol diisopropanolamine mixed solution obtained in step b), discharge and fill it.

[0027] The beneficial effect of the preparation method of monoethanol diiso...

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Abstract

The invention discloses a preparation method of monoethanol diisopropanolamine. The monoethanol diisopropanolamine is prepared by mixing and reacting diisopropanolamine and epoxyethane in a reaction kettle. The method does not adopt the traditional synthesis reaction of liquid ammonia with epoxyethane and epoxypropane, but creatively reacts the raw material diisopropanolamine with epoxyethane to obtain the product. The invention has the advantages of high yield, short reaction time, mild reaction conditions and controllable process; one active position on the ammonia molecule is substituted by epoxyethane, so that the molecular structure of the product can be controlled more easily; and by using the high-content diisopropanolamine as the raw material, the product has better smell, color and reaction time than that of an ammonia process.

Description

technical field [0001] The invention relates to a preparation method of monoethanol diisopropanolamine. Background technique [0002] At present, in the cement industry, a large amount of energy is consumed in the grinding of raw materials and clinker; during the grinding process, the free charge density on the surface of cement particles increases, the free energy on the solid surface increases, and the inter-particle Collision with each other increases the probability of particle agglomeration and adhesion. If the cement particles are further broken, additional factors are needed to destroy this tendency of agglomeration and adhesion, and the use of grinding aids is the simplest and most convenient method. Adding grinding aids requires less investment, quick results, and can effectively improve the quality of cement. At present, the commonly used organic substance grinding aids at home and abroad are alkanolamines and polyhydric alcohols, such as triethanolamine, diethano...

Claims

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Application Information

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IPC IPC(8): C07C215/12C07C213/04
Inventor 陈雪
Owner NINGBO LIANKAI CHEM
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