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Production device and process for N-methyldiethanolamine

A technology of methyldiethanolamine and production equipment, which is applied in the direction of preparation of organic compounds, preparation of aminohydroxyl compounds, organic compound/hydride/coordination complex catalysts, etc., can solve problems such as separation and purification difficulties, and reduce side reactions , reduce material consumption, reduce separation energy consumption and the effect of equipment investment

Pending Publication Date: 2019-09-20
CHINA CONSTR IND & ENERGY ENG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the current process mostly uses basic catalysts, which causes difficulties in the separation and purification of products.

Method used

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  • Production device and process for N-methyldiethanolamine

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Embodiment

[0025] Example: A production device for N-methyldiethanolamine, including a primary mixer 1, a secondary mixer 2, a reactor 3, an amine distillation tower 4, a dehydration tower 5, an initiator tank 6, and a secondary amine tower 7 And a product refining tower 8; the primary mixer 1 is provided with a feed inlet and a discharge port, the secondary mixer 2 is provided with a feed inlet and a discharge port, and the discharge port of the primary mixer 1 is connected with the secondary mixer The feed port of 2 is connected, and the discharge port of secondary mixer 2 is connected with the feed port of reactor 3. Reactor 3 is a tubular reactor 3 with an operating temperature of 90°C~150°C and an operating pressure of 2.5MPa ~5.0MPa, the reactor 3 is equipped with a discharge port, the discharge port of the reactor 3 is connected to the feed port in the middle of the amine distillation tower 4, the amine distillation tower 4, the number of theoretical plates is 10~15, and the operat...

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Abstract

The invention discloses a production device and process for N-methyldiethanolamine. The production device comprises a primary mixer, a secondary mixer, a reactor, an ammonia still, a dehydration tower, an initiator tank, a secondary amine tower and a product refining tower. The invention develops the novel production device and the novel refining process directed at the problems of high unit consumption, complicated separation process and low product purity in current N-methyldiethanolamine production processes. According to the invention, the purity of the product N-methyldiethanolamine is increased from 95% to 99.8%; the unit consumption of ethylene oxide decreases from 0.95-1.0 to 0.75-0.8; the unit consumption of monomethylamine decreases from 0.4-0.45 to 0.26-0.30; intermediate products produced in the process, unreacted monomethylamine and a small amount of ethylene oxide are completely reused by separation, so material consumption is reduced, and the discharge of waste liquid is greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of petrochemical industry, and in particular relates to a production device and process of N-methyldiethanolamine. Background technique [0002] N-Methyldiethanolamine (MDEA) is a colorless or light yellow oily liquid, weakly alkaline, with excellent selectivity and thermal stability, and low vapor pressure. When dealing with sour gas, the gas phase loss is small, and the device is slightly corroded. It is suitable for processing natural gas, synthesis gas, refinery gas, and Claus sulfur tail gas. At the same time, it can selectively remove H2S from H2S and CO2 gases, and is especially suitable for the treatment of gases with high volume ratio of CO2 and H2S. It has widely replaced other amine solutions often used in the field of gas purification, and the market prospect is very broad. MDEA can also be used as an insecticide, emulsifier, and pharmaceutical intermediate. [0003] At present, the industrial ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C213/04C07C213/10C07C215/12B01J31/02
CPCC07C213/04C07C213/10B01J31/0237C07C215/12
Inventor 周俊超罗文聆蔡静葛昕朱益洋
Owner CHINA CONSTR IND & ENERGY ENG GRP CO LTD