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Apparatus for non-aqueous catalytic synthesis and self-separation of 1-amino-2-propanol, and process thereof

An isopropanolamine and self-separation technology, which can be used in molecular sieve catalysts, preparation of organic compounds, preparation of amino hydroxy compounds, etc., can solve the problems of limiting the large-scale application of high-pressure supercritical methods, consuming large amounts of energy, and tedious operations. Reasonable design, reduced generation, good selectivity

Inactive Publication Date: 2019-09-03
山东河清化工科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the main method of producing MIPA is to react directly with ammonia water and propylene oxide to obtain a mixture of MIPA, DIPA, and TIPA. The mixture is then separated by vacuum distillation to obtain pure MIPA, DIPA, and TIPA. Generate DIPA and TIPA, which must be separated after use, and the operation is very cumbersome
[0005] In China, the low-concentration ammonia water method is mainly used for production, and the water in the product needs to be removed in the treatment after the product is produced, which will consume a lot of energy
Both the high-pressure method and the supercritical method are carried out under high pressure, and the pressure is above 15MPa. If the pressure is too high, the requirements for equipment are particularly strict, which limits the large-scale application of the high-pressure supercritical method in China, and there are few non-aqueous catalysts in China. Catalyzed Reaction of Propylene Oxide with Ammonia

Method used

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  • Apparatus for non-aqueous catalytic synthesis and self-separation of 1-amino-2-propanol, and process thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0035] The preparation method of described solid catalyst is as follows:

[0036] 1) Synthesis of titanium silicon molecular sieve

[0037] Tetraethyl orthosilicate was used as the silicon source, tetrabutyl titanate was used as the titanium source, tetrapropylammonium hydroxide was used as the template, and SiO 2 · aTPAOH · bTiO 2 · cH 2 O forms a gel, wherein a=0.2, b=0.02;

[0038] Under stirring conditions, mix water, ethyl orthosilicate, tetrabutyl titanate and tetrapropyl ammonium hydroxide, stir in a constant temperature water bath at 80°C for 30 hours, add deionized water during the stirring process to maintain the mixture composition;

[0039] Put the mixed solution into a stainless steel autoclave with a polytetrafluoroethylene internal scale, crystallize at 200°C for 5 days, wash the crystallized powder to neutrality and dry it, then put it into a resistance furnace and heat it up to Calcined at 560°C for 8 hours, cooled to room temperature to obtain titanium s...

Embodiment 1

[0043] Such as figure 1 As shown, the non-aqueous catalytic synthesis-isopropanolamine self-separation device includes a reactor 1, a propylene oxide inlet 2 and an ammonia inlet 3 are arranged at the top of the reactor 1, and a discharge port 4 is arranged at the bottom of the reactor 1, The inside of the reactor 1 is provided with orifice plate 5, ceramic ball 6 and solid catalyst 7 sequentially from bottom to top, the outside of the reactor 1 is provided with a jacket 8, the discharge port 4 is connected with the buffer pipe 9, and the outside of the buffer pipe 9 is provided with a cooling plate The pipe 10 and the buffer pipe 9 are provided with a valve A11 and a valve B12.

[0044] The top of the reactor 1 is also provided with a temperature measuring device and a pressure measuring device.

[0045] The technique of described non-aqueous catalytic synthesis-isopropanolamine self-separation device, concrete steps are as follows:

[0046]1) Load the solid catalyst into t...

Embodiment 2

[0051] The structure of the device is the same as in Example 1.

[0052] The technique of described non-aqueous catalytic synthesis-isopropanolamine self-separation device, concrete steps are as follows:

[0053] 1) Load the solid catalyst into the reactor, raise the temperature to 200°C, and pass nitrogen gas for 10 minutes;

[0054] 2) Continuously feed propylene oxide and ammonia gas into the reactor through the propylene oxide inlet and the ammonia gas inlet to react, the molar ratio of ammonia gas to propylene oxide is 5:1, and the flow rate of ammonia gas: 80mL / min;

[0055] 3) The temperature of the buffer tube is controlled at 60°C, and the isopropanolamine produced by the reaction is extracted from the end of the buffer tube. During the reaction, valve A is opened and valve B is closed. When the product is extracted, valve A is closed and valve B is opened. .

[0056] The purity of the extracted monoisopropanolamine product is 98.5%.

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Abstract

The invention relates to a 1-amino-2-propanol production process, particularly to an apparatus for non-aqueous catalytic synthesis and self-separation of 1-amino-2-propanol, and a process thereof. Theapparatus comprises a reactor, wherein a propylene oxide inlet and an ammonia gas inlet are arranged on the top portion of the reactor, a material outlet is arranged on the lower portion of the reactor, the interior of the reactor is sequentially provided with a hole plate, a porcelain ball and a solid catalyst from bottom to top, a jacket is arranged on the outer portion of the reactor, the material outlet is connected to a buffer pipe, the outer portion of the buffer pipe is provided with a cooling coil pipe, and the buffer pipe is provided with a valve A and a valve B. The invention further provides the process. According to the present invention, with the apparatus, the continuous reaction can be achieved, only the 1-amino-2-propanol product is extracted, only a very small amount of diisopropanolamine and triisopropanolamine are formed, and the requirements of the 1-amino-2-propanol industrial product can be met without the subsequent separation; and the process using the apparatus is scientific, reasonable, simple and easy-performing.

Description

technical field [0001] The invention relates to a production process of isopropanolamine, in particular to a non-aqueous catalytic synthesis of isopropanolamine self-separation device and its process. Background technique [0002] As a kind of alcohol amine, isopropanolamine can be used in petroleum sulfur removal additives, surfactants, emulsifiers and other industries. Compared with other alcohol amines (ethanolamine), it has better performance and will not cause secondary secondary pollution. Isopropanolamines include monoisopropanolamine (MIPA), diisopropanolamine (DIPA) and triisopropanolamine (TIPA). [0003] Monoisopropanolamine, also known as 1-amino-2-propanol, is easily soluble in water and ethanol. The toxicity of MIPA is very weak, but its structure contains amine groups, so it will damage the eyes and skin to a certain extent. MIPA has a wide range of uses: good oil solubility, foaming and foam stability. Due to this unique property, it is often used in the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J8/02C07C213/04C07C215/08B01J29/89
CPCB01J8/0242B01J29/89B01J2229/18C07C213/04C07C215/08
Inventor 于如军刘秀清陈艳艳张玉营官凤钢彭程张浩
Owner 山东河清化工科技有限公司
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