Method for producing alkyl alcohol amine

A technology of alkyl alcohol amine and alkyl amine, applied in chemical instruments and methods, preparation of amino compounds, preparation of organic compounds, etc., can solve the problems of reducing product quality, increasing energy consumption, limiting production capacity, etc., to expand the adjustment range , the effect of reducing side effects and improving safety

Active Publication Date: 2012-07-11
FEIXIANG NEW MATERIAL R & D SUZHOU INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This limits the improvement of production capacity, frequently changes operating parameters, cannot produce continuously and stably, the unit consumption and energy consumption are high, the stability of product quality is difficult to guarantee, and the labor intensity of workers is high.
[0003] In the prior art, the synthesis reaction is generally carried out in the form of alkylamine aqueous solution, which reduces the capacity of the reactor and increases a series of side reactions caused by water, and rectification must have a dehydration step, and some by-products are diff

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  • Method for producing alkyl alcohol amine
  • Method for producing alkyl alcohol amine
  • Method for producing alkyl alcohol amine

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Embodiment 1

[0051] This embodiment is used to illustrate a kind of method of continuous production alkanolamine of the present invention, as figure 1 as shown,

[0052](1) Synthetic reaction: raw material ethylene oxide (EO) and raw material monomethylamine (MMA, purity 99% by weight, wherein, the content of water is less than 0.1% by weight) are pumped into multi-point continuous reactor by metering pump respectively React within, wherein, the molar ratio of monomethylamine and ethylene oxide total amount is 3: 1, take ethylene oxide total amount as the basis, the ethylene oxide of each ethylene oxide feed port feed The amount is 25 mol%, wherein, the feeding amount of monomethylamine makes its flow velocity in the pipeline be 1m / s, and the feeding amount of each feeding port ethylene oxide makes its flow velocity in the pipeline be 1m / s; the pressure in the reactor is 3.6MPa, and the temperature is 110°C to obtain a mixture containing methyl monoethanolamine and methyldiethanolamine, w...

Embodiment 2

[0067] This embodiment is used to illustrate a kind of method of continuous production alkanolamine of the present invention, as figure 1 as shown,

[0068] (1) Synthetic reaction: raw material ethylene oxide and raw material monomethylamine (purity is 99% by weight, wherein, the content of water is less than 0.1% by weight) are respectively pumped in the multi-point continuous reactor by metering pump and reacted, Wherein, the molar ratio of monomethylamine and the total amount of oxirane is 5: 1, taking the total moles of oxirane as the basis, the amount of the oxirane of each oxirane feed inlet feed is 25 mol%, wherein, the feed rate of monomethylamine makes its flow velocity in the pipeline be 0.8m / s, and the feed rate of each feed port ethylene oxide makes its flow velocity in the pipeline 0.8m / s ; The pressure in the reactor is 3.5MPa, and the temperature is 110° C. to obtain a mixture containing methyl monoethanolamine and methyldiethanolamine, and the mixture leaves t...

Embodiment 3

[0083] This embodiment is used to illustrate a kind of method of continuous production alkanolamine of the present invention, as figure 1 as shown,

[0084] (1) Synthetic reaction: raw material ethylene oxide and raw material monomethylamine (purity is 99% by weight, wherein, the content of water is less than 0.1% by weight) are respectively pumped in the multi-point continuous reactor by metering pump and reacted, Wherein, the mol ratio of monomethylamine and oxirane total amount is 1.2: 1, and the total mole number of oxirane is a benchmark, the amount of the oxirane of each oxirane feed inlet feed is equal to It is 25 mol%, and wherein, the feed rate of monomethylamine makes its flow velocity in pipeline be 1.5m / s, and the feed rate of each feeding port ethylene oxide makes its flow velocity in pipeline be 1.5m / s s; the pressure in the reactor is 4MPa, and the temperature is 120° C. to obtain a mixture containing methyl monoethanolamine and methyldiethanolamine, which leav...

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Abstract

The invention provides a method for producing alkyl alcohol amine. The method is characterized by comprising the following steps of: under an alkylation reaction condition, repeatedly contacting alkylene oxide with alkylamine in a reactor; and repeatedly reacting alkylene oxide with alkylamine. On one hand, the side reaction of the alkylene oxide is reduced, and the yield proportion adjusting ranges of alkyl mono-alkylol amine and alkyl di-alkylol amine are expanded; meanwhile, raw materials are not required to be mixed in advance, and the safety of production is improved; moreover, alkylene oxide enters segmentally in a multipoint way, so that reaction heat is segmentally released, and a reaction is more stable; and furthermore, the content of the mono-alkyl alkylol amine can be controlled, so that the mono-alkyl alkylol amine is not required to be taken as a circulating liquid, and the yield of the reaction is increased.

Description

technical field [0001] The present invention relates to a process for the production of alkanolamines. Background technique [0002] In the prior art, the domestic and international production of alkanolamine generally adopts a batch production process, wherein the synthesis reaction is carried out continuously, while the distillation is a batch process. This limits the improvement of production capacity, frequently changes operating parameters, cannot produce continuously and stably, the unit consumption and energy consumption are high, the stability of product quality is difficult to guarantee, and the operation intensity of workers is high. [0003] In the prior art, the synthesis reaction is generally carried out in the form of alkylamine aqueous solution, which reduces the capacity of the reactor and increases a series of side reactions caused by water, and rectification must have a dehydration step, and some by-products are difficult to Separation from the desired pro...

Claims

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Application Information

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IPC IPC(8): C07C211/04C07C211/05C07C211/06C07C211/08C07C209/16
Inventor 卢中杰施建刚李勇陈界平王宏刁仕权
Owner FEIXIANG NEW MATERIAL R & D SUZHOU INST
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