Process for continuously producing N-monomethylethanolamine

A technology of methyl monoethanolamine and process method, applied in chemical instruments and methods, preparation of organic compounds, organic chemistry and other directions, can solve problems such as low yield, low selectivity, increased energy consumption, etc., and achieve good color and product quality. The effect of stable quality and increased production capacity

Active Publication Date: 2010-09-15
MAOMING YUNLONG IND DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since most of the purchased catalyst is water, most of the water does not participate in the reaction during the reaction process, and the water must be distilled out in the subsequent distillation process, which furth

Method used

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  • Process for continuously producing N-monomethylethanolamine
  • Process for continuously producing N-monomethylethanolamine
  • Process for continuously producing N-monomethylethanolamine

Examples

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Embodiment 1

[0060] A kind of embodiment of the processing method of continuous production N-methyl monoethanolamine of the present invention is as follows figure 2 shown, including the following steps:

[0061] (1) After the raw material oxirane 13 and the raw material monomethylamine 10 are pumped into the mixer 14 by metering pumps 11 and 12 and mixed respectively, the mixed material enters the reactor 15, and in the reactor 15 The pressure is 4Mpa ~ 6Mpa, and the temperature is controlled at 90°C ~ 140°C to react to form a mixture containing N-methyl monoethanolamine.

[0062] The ratio of the raw material ethylene oxide 13 to the raw material monomethylamine 10 is 1:2-3.

[0063] (2) The mixture containing N-methyl monoethanolamine is sent to the ammonia distillation tower 16, and the crude product of monomethylamine and N-methyl monoethanolamine is separated by distillation, and the monomethylamine separated by the distillation is sent back Into the container of the raw material m...

Embodiment 2

[0090] A kind of embodiment of the processing method of continuous production N-methyl monoethanolamine of the present invention is as follows image 3 shown, including the following steps:

[0091] (1) The raw material ethylene oxide 23 and the raw material monomethylamine 20 are pumped into the first mixer 241 by metering pumps 21 and 22 respectively for preliminary mixing, and then the preliminary mixed material is sent into the second mixer 242 for further mixing Finally, the further mixed material enters the reactor 25, and reacts under the pressure in the reactor 25 of 4Mpa to 6Mpa, and the temperature is controlled at 90°C to 140°C to generate a mixture containing N-methyl monoethanolamine,

[0092] The ratio of the raw material ethylene oxide to the raw material monomethylamine is 1:2-3.

[0093] (2) The mixture containing N-methyl monoethanolamine is sent to the ammonia distillation tower 26, and the crude product of monomethylamine and N-methyl monoethanolamine is s...

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Abstract

The invention discloses a process for continuously producing N-monomethylethanolamine, which comprises the following steps of: (1) pumping an ethylene oxide raw material and a monomethylamine raw material into a mixer or a two-stage mixer through a metering pump respectively, mixing the raw materials, and then reacting the mixed materials in a reactor to generate a mixture containing the N-monomethylethanolamine, wherein the mass ratio of the ethylene oxide raw material to the monomethylamine raw material is 1: 2-3; (2) delivering the mixture containing the N-monomethylethanolamine to an amine distillation tower, separating monomethylamine and an N-monomethylethanolamine coarse product by distillation, and conveying the distilled monomethylamine to a monomethylamine raw material container; and (3) conveying the N-monomethylethanolamine coarse product to a light component distillation tower and a reduced pressure rectifying tower in which efficient pore plate ripple fillers are filled and which are connected in series, separating an N-monomethylethanolamine product by continuous distillation, and continuously discharging the N-monomethylethanolamine product from the side or the topof the reduced pressure rectifying tower. The process is characterized in that the production process is continuous, the produced product has stable quality and high yield, and meanwhile, the processcan improve the yield and reduce the energy consumption and the material consumption, and is suitable for industrialized popularization and application.

Description

technical field [0001] The invention relates to the technical field of petrochemical industry, in particular to a process for continuous production of N-methyl monoethanolamine. Background technique [0002] N-Methylaminoethanol (2-Methylaminoethanol; N-Methylmonoethanolamine; 2-(methylamino)-Ethanol; (2-hydroxyethyl)methylamine), commonly known as MMEA, 2-(methylamino)ethanol or N-methylmonoethanolamine, is An excellent solvent, pharmaceutical intermediate and high-efficiency desulfurization and decarbonization agent, which can be widely used in desulfurization and decarbonization in chemical fertilizer plants, synthetic ammonia plants, and oil refineries. Detergents, emulsifiers and activators, etc. [0003] In the prior art, the general production of N-methyl monoethanolamine at home and abroad adopts a batch production process, such as figure 1 Shown, wherein, the process of reaction and distilling amine is continuous, but rectifying process is intermittent, owing to a...

Claims

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Application Information

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IPC IPC(8): C07C215/08C07C213/00C07C213/10
Inventor 梁坤
Owner MAOMING YUNLONG IND DEV
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