Method for continuous production of N-methylisopropanolamine

A technology of methyl isopropanolamine and monomethylamine, which is applied in chemical instruments and methods, preparation of organic compounds, preparation of amino hydroxyl compounds, etc., and can solve problems such as the inability to meet the demand for N-methyl isopropanolamine , to achieve the effect of saving manpower, low production cost and improving manpower

Active Publication Date: 2017-10-03
MAOMING YUNLONG IND DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is no industrial process that can efficiently produce N-methylisopropanolamine in the industry, so that it cannot meet the demand for N-methylisopropanolamine in industrial manufacturing

Method used

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  • Method for continuous production of N-methylisopropanolamine
  • Method for continuous production of N-methylisopropanolamine
  • Method for continuous production of N-methylisopropanolamine

Examples

Experimental program
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Embodiment 1

[0027] A method for the continuous production of N-methylisopropanolamine in the present embodiment, such as figure 1 shown, including the following steps:

[0028] Step 1, feeding: feed propylene oxide and monomethylamine into the mixer respectively through a metering pump, wherein the molar ratio of propylene oxide to monomethylamine is 1:1.1;

[0029] Step 2, mixing: adjusting the temperature of the mixer to 10°C and the pressure to 3.5MPa, and mixing monomethylamine and propylene oxide in the mixer to obtain a uniformly mixed mixture;

[0030] Step 3, reaction: pump the mixture obtained in step 2 into the reactor, then adjust the temperature of the reactor to 110°C, and the pressure to 3.5MPa, and allow the mixture to fully react in the reactor, the reaction time is 5min, Obtain the first crude product containing N-methylisopropanolamine; Wherein, the reaction formula of propylene oxide and monomethylamine is:

[0031]

[0032] Step 4, removing monomethylamine: the fi...

Embodiment 2

[0036] A method for the continuous production of N-methylisopropanolamine in the present embodiment, such as figure 1 shown, including the following steps:

[0037] Step 1, feeding: feed propylene oxide and monomethylamine into the mixer respectively through a metering pump, wherein the molar ratio of propylene oxide to monomethylamine is 1:1.3;

[0038] Step 2, mixing: adjusting the temperature of the mixer to 30°C and the pressure to 5.0MPa, and mixing monomethylamine and propylene oxide in the mixer to obtain a uniformly mixed mixture;

[0039] Step 3, reaction: continuously enter the mixture obtained in step 2 into the reactor, then adjust the temperature of the reactor to 130°C, and the pressure to 5.0MPa, and allow the mixture to fully react in the reactor, the reaction time is 2min, Obtain the first crude product containing N-methylisopropanolamine; Wherein, the reaction formula of propylene oxide and monomethylamine is:

[0040]

[0041] Step 4, removing monomethy...

Embodiment 3

[0045] A method for the continuous production of N-methylisopropanolamine in the present embodiment, such as figure 1 shown, including the following steps:

[0046] Step 1, feeding: feed propylene oxide and monomethylamine into the mixer respectively through a metering pump, wherein the molar ratio of propylene oxide to monomethylamine is 1:1.2;

[0047] Step 2, mixing: adjusting the temperature of the mixer to 15°C and the pressure to 4.0MPa, and mixing monomethylamine and propylene oxide in the mixer to obtain a uniformly mixed mixture;

[0048] Step 3, reaction: continuously enter the mixture obtained in step 2 into the reactor, then adjust the temperature of the reactor to 120°C, the pressure to 4.0MPa, and allow the mixture to fully react in the reactor, and the reaction time is 3.5min , obtain the first crude product containing N-methylisopropanolamine; Wherein, the reaction formula of propylene oxide and monomethylamine is:

[0049]

[0050] Step 4, removing monome...

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Abstract

The invention relates to the technical field of petrochemical products and particularly relates to a method for continuous production of N-methylisopropanolamine. The method comprises respectively metering monomethylamine and propylene epoxide, feeding the monomethylamine and propylene epoxide into a mixer, carrying out uniform mixing, feeding the mixture into a reactor, carrying out a reaction process, and carrying out separation purification on the crude product containing N-methylisopropanolamine orderly through an amine distillation column, a light component column and a reduced-pressure rectification column to obtain a refined product of N-methylisopropanolamine. The method fills the gap of high efficiency production of N-methylisopropanolamine in the industry and realizes continuous and stable mass production of N-methylisopropanolamine. The product has stable quality. The method is an eco-friendly process.

Description

technical field [0001] The invention relates to the technical field of petrochemical products, in particular to a method for continuously producing N-methylisopropanolamine. Background technique [0002] N-Methylisopropanolamine, referred to as MMIPA, is a colorless transparent liquid with an ammonia smell, soluble in water, methanol, ethanol, slightly soluble in toluene, acetone, petroleum ether and other organic solvents, under normal temperature and pressure, The specific gravity of N-methylisopropanolamine is 0.896g / cm 3 , the boiling point is 146°C, the flash point is 51°C, the viscosity is 2.1CP, and the refractive index is 1.438. In actual production, N-methylisopropanolamine is widely used in the removal of hydrogen sulfide from natural gas and oil refinery dry gas, and the removal of carbon dioxide from large-scale synthetic ammonia. It is a new type of solvent with excellent performance in selective desulfurization and decarbonization. It has the advantages of hi...

Claims

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Application Information

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IPC IPC(8): C07C213/04C07C215/08
CPCC07C213/04C07C215/08
Inventor 梁坤
Owner MAOMING YUNLONG IND DEV
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