Preparation method of isopropanolamine

A technology of isopropanolamine and propylene oxide, which is applied in the preparation of organic compounds, chemical instruments and methods, preparation of amino hydroxyl compounds, etc., can solve the problems of high energy consumption, save energy, reduce by-products, and reduce equipment Effect

Inactive Publication Date: 2015-07-08
惠州市富力新技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The purification of the product after such synthesis will seriously consume a large amo

Method used

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  • Preparation method of isopropanolamine

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0020] Example 1: If monoisopropanolamine is sold as the main product, such as figure 1 As shown,

[0021] (1) Inject 5 parts of solution A into the synthesis reactor, and then 1 part of the same mole of propylene oxide from the metering tank pressurized 0.1~0.2Mpa into the synthesis reactor to react with solution A to produce solution B. The temperature during reaction Control at 30~40℃;

[0022] (2) The solution B in the synthesis reactor is removed by the external circulation pump, cooled to the reaction temperature by the heat exchanger, and then sprayed into the synthesis reactor through the static atomizing ejector in the synthesis reactor to accelerate the reaction of the materials. After the reaction is completed in 2-8 hours, solution C is obtained, wherein the reaction temperature in the synthesis reactor is 30-40°C, and the reaction pressure is 0.2-0.4 MPa;

[0023] (3) The solution C is sent to the flash tower to remove 90-96% of the ammonia, and the pressure is reduced...

Example Embodiment

[0028] Example 2: If diisopropanolamine is sold as the main product, such as figure 1 As shown,

[0029] (1) Inject 5 parts of solution A into the synthesis reactor, and then 2 parts of the same mole of propylene oxide from the metering tank pressurized 0.1~0.2Mpa into the synthesis reactor to react with solution A to produce solution B. The temperature during reaction Control at 30~40℃;

[0030] (2) The solution B in the synthesis reactor is removed by the external circulation pump, cooled to the reaction temperature by the heat exchanger, and then sprayed into the synthesis reactor through the static atomizing ejector in the synthesis reactor to accelerate the reaction of the materials. After the reaction is completed in 2-8 hours, solution C is obtained, wherein the reaction temperature in the synthesis reactor is 30-40°C, and the reaction pressure is 0.2-0.4 MPa;

[0031] (3) The solution C is sent to the flash tower to remove 90-96% of the ammonia, and the pressure is reduced ...

Example Embodiment

[0036] Example 3: If triisopropanolamine is sold as the main product, such as figure 1 As shown,

[0037] (1) Inject 5 parts of solution A into the synthesis reactor, and then 2 parts of the same mole of propylene oxide from the metering tank pressurized 0.1~0.2Mpa into the synthesis reactor to react with solution A to produce solution B. The temperature during reaction Control at 30~40℃;

[0038] (2) The solution B in the synthesis reactor is removed by the external circulation pump, cooled to the reaction temperature by the heat exchanger, and then sprayed into the synthesis reactor through the static atomizing ejector in the synthesis reactor to accelerate the reaction of the materials. After the reaction is completed in 2-8 hours, solution C is obtained, wherein the reaction temperature in the synthesis reactor is 30-40°C, and the reaction pressure is 0.2-0.4 MPa;

[0039] (3) The solution C is sent to the flash tower to remove 90-96% of the ammonia, and the pressure is reduced...

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Abstract

The invention discloses a preparation method of isopropanolamine. According to the preparation method, liquid ammonia prepared by dissolving ammonia gas in methanol, and epoxypropane are taken as raw materials; at the same time, methanol is also taken as a catalyst; epoxypropane is delivered from a measuring tank into a synthesis reactor under pressure for reaction with liquid ammonia; temperature reduction and repeated reaction of an obtained raw material mixed solution is realized via an outer circulation; and epoxypropane is added in sections. Epoxypropane is added in sections, synthesis of needed products is realized, proportion of other products in an obtained mixed product is reduced; segmented purification is carried out; in-time rectification and purification of synthesized products are realized; needed products are obtained; and product ratio reduction caused by continuous reaction is avoided.

Description

technical field [0001] The invention belongs to the field of chemical synthesis, and in particular relates to a preparation method of isopropanolamine. Background technique [0002] The consumption of isopropanolamine series products at home and abroad shows an increasing trend year by year. It contains three kinds of products: monoisopropanolamine, diisopropanolamine and triisopropanolamine. Each product has its wide range of applications. Monoisopropanolamine can be used as surfactants, detergents, textile auxiliaries, fragrances, dye auxiliaries, pharmaceutical and pesticide intermediates, dispersants, etc.; diisopropanolamine It can be used as detergent, desulfurizer, pharmaceutical and pesticide intermediate; triisopropanolamine can be used as cement grinding aid, crosslinking agent and auxiliary agent for rubber, plastic and polyurethane processing. [0003] At present, the final product required to produce isopropanolamine products is very single, which is only one ...

Claims

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Application Information

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IPC IPC(8): C07C215/12C07C215/08C07C213/04C07C213/10
Inventor 邬桂林
Owner 惠州市富力新技术有限公司
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