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Process for synthesis of triisopropanolamine

A technology of triisopropanolamine and a synthesis method, which is applied in chemical instruments and methods, preparation of organic compounds, preparation of aminohydroxy compounds, etc., can solve the problems of low product concentration, large investment in production equipment, complicated processes, etc. The process is simple, the dehydration energy consumption is reduced, and the investment cost is low.

Active Publication Date: 2007-04-04
HONGBAOLI GRP CO LTD
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0008] The domestic production technology is all: adopt the reaction of saturated ammonia water 25~28% (m / m) and propylene oxide to generate the target product, but the water content of the product generated is relatively large, and the concentration of the final product is low, so a large amount of water needs to be removed. It consumes a lot of heat energy, so the energy consumption is high
Most foreign companies use 60-90% ammonia solution as raw material for continuous production, the reaction pressure is 6-8Mpa, high-pressure equipment is required, the investment in production equipment is large, and the process is relatively complicated

Method used

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  • Process for synthesis of triisopropanolamine
  • Process for synthesis of triisopropanolamine
  • Process for synthesis of triisopropanolamine

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Embodiment

[0022] to 1M 3 The reactor was depressurized to -0.098Mpa, and the decompression was stopped, and 80kg of deionized water was added into the kettle, and 32kg of liquid ammonia was pumped into the reactor to make the ammonia form a supersaturated solution. Control the reaction temperature at 20-75°C, slowly add 330 kg of propylene oxide to the reactor at a feeding rate of 2-5 kg / min, and control the pressure of the reactor below 0.5 MPa. When adding propylene oxide, attention should be paid: the pressure of the canned pump should be controlled to be greater than the outlet pressure of the liquid ammonia storage tank and the pressure of the reactor to prevent the material from flowing backward. Pass into liquid ammonia 32kg for the second time, operation method and condition are the same as before; Add propylene oxide 330kg for the second time; Operation method is the same as before. After the addition of propylene oxide, heat preservation and aging for 1.0-3.0 hours, temperatu...

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Abstract

The invention provides a process for synthesis of triisopropanolamine by using liquid ammonia and trimethylene oxide as raw material, water as catalyst, stock preparing by the mol ratio of liquid ammonia : trimethylene oxide = 1 : 3.00 - 3.05, charging deionized water in one time, charging liquid ammonia and trimethylene oxide in two times, fully stirring, sustaining the pressure <0.5 MPa, sustaining reaction temperature between 20-75 deg. C for 1.0-3.0 hours, decompressing for dehydration till the water content is less than 5%.

Description

Technical field: [0001] The invention relates to a synthesis process for preparing triisopropanolamine with ammonia and propylene oxide as raw materials. Background technique: [0002] Triisopropanolamine is a white or light yellow waxy crystalline solid, easily soluble in water, ethanol, diethanol and acetone. Because it contains both amine groups and hydroxyl groups in the molecule, it has the comprehensive performance of amine and alcohol. It is widely used as a surfactant and other purposes. [0003] The preparation of triisopropanolamine is mostly obtained by the reaction of pure ammonia and propylene oxide. At present, it is generally produced by intermittent reaction of 25% saturated ammonia water and propylene oxide at home and abroad. Water acts as a catalyst and does not serve as a solvent. The reaction formula is as follows: [0004] [0005] Simultaneously the water in ammoniacal liquor also produces following side reaction with propylene oxide, generates by-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C215/08C07C213/04
Inventor 芮敬功陶梅娟芮益民
Owner HONGBAOLI GRP CO LTD
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