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Method for producing isopropanolamine and 1, 2-propane diamine by cracking 2, 5-dimethyl piperazine

A technology of dimethylpiperazine and isopropanolamine, which is applied in chemical instruments and methods, preparation of amino compounds, preparation of organic compounds, etc., can solve problems such as unusable, easy to control parameters, simple cracking process, and easy The effect of industrialization promotion

Active Publication Date: 2021-06-08
山东达民化工股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, such catalysts have been proved in the laboratory to be unusable for the cracking of 2,5-dimethylpiperazine

Method used

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  • Method for producing isopropanolamine and 1, 2-propane diamine by cracking 2, 5-dimethyl piperazine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The method for producing isopropanolamine and 1,2-propylenediamine by cracking 2,5-dimethylpiperazine described in Example 1 consists of the following steps:

[0045] (1) Pass 2,5-dimethylpiperazine into the vaporizer of the reaction system, and after heating and vaporizing the mixed gas of ammonia and water, mix with Co-Ni-Pd / Al in the reactor 2 o 3 Catalyst carries out contact cracking reaction;

[0046] (2) After condensing the reaction product obtained in step (1), enter the distillation separation system to obtain pure isopropanolamine and 1,2-propanediamine.

[0047] in:

[0048] The Co-Ni-Pd / Al 2 o 3 As for the catalyst, based on the weight of the metal oxide, CoO is 2% by weight of the catalyst, NiO is 2% by weight of the catalyst, and PdO is 4% by weight of the catalyst.

[0049] The Co-Ni-Pd / Al 2 o 3 The pore volume is 0.5ml / g, and the specific surface area is 290m 2 / g.

[0050] The temperature of the mixed gas of ammonia and water described in step (1...

Embodiment 2

[0073] The method for producing isopropanolamine and 1,2-propylenediamine by cracking 2,5-dimethylpiperazine described in Example 2 consists of the following steps:

[0074] (1) Pass 2,5-dimethylpiperazine into the vaporizer of the reaction system, and after heating and vaporizing the mixed gas of ammonia and water, mix with Co-Ni-Pd / Al in the reactor 2 o 3 Catalyst carries out contact cracking reaction;

[0075] (2) After condensing the reaction product obtained in step (1), enter the distillation separation system to obtain pure isopropanolamine and 1,2-propanediamine.

[0076] in:

[0077] The Co-Ni-Pd / Al 2 o 3 As for the catalyst, according to the weight of the metal oxide, CoO is 1% of the weight of the catalyst, NiO is 1% of the weight of the catalyst, and PdO is 3% of the weight of the catalyst.

[0078] The Co-Ni-Pd / Al 2 o 3 The pore volume is 0.6ml / g, and the specific surface area is 320m 2 / g.

[0079] The temperature of the mixed gas of ammonia and water de...

Embodiment 3

[0102] The method for producing isopropanolamine and 1,2-propylenediamine by cracking 2,5-dimethylpiperazine described in Example 3 consists of the following steps:

[0103] (1) Pass 2,5-dimethylpiperazine into the vaporizer of the reaction system, and after heating and vaporizing the mixed gas of ammonia and water, mix with Co-Ni-Pd / Al in the reactor 2 o 3 Catalyst carries out contact cracking reaction;

[0104] (2) After condensing the reaction product obtained in step (1), enter the distillation separation system to obtain pure isopropanolamine and 1,2-propanediamine.

[0105] in:

[0106] The Co-Ni-Pd / Al 2 o 3 As for the catalyst, based on the weight of the metal oxide, CoO is 3% by weight of the catalyst, NiO is 3% by weight of the catalyst, and PdO is 4% by weight of the catalyst.

[0107] The Co-Ni-Pd / Al 2 o 3 The pore volume is 0.4ml / g, and the specific surface area is 250m 2 / g.

[0108] The temperature of the mixed gas of ammonia and water described in step ...

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Abstract

The invention belongs to the technical field of organic synthesis, and particularly relates to a method for producing isopropanolamine and 1, 2-propane diamine by cracking 2, 5-dimethyl piperazine. The method comprises the following steps: carrying out a contact cracking reaction on 1, 2, 5-dimethylpiperazine under the action of a Co-Ni-Pd / Al2O3 catalyst to prepare a mixture of isopropanolamine and 1, 2-propane diamine, and carrying out distillation separation to obtain pure isopropanolamine and 1, 2-propane diamine. According to the method for producing isopropanolamine and 1, 2-propane diamine by cracking 2, 5-dimethyl piperazine, the Co-Ni-Pd / Al2O3 catalyst is adopted for cracking reaction, the catalyst has the advantages of being high in specific surface area, high in mechanical strength and good in stability, the preparation process is simple, and the catalyst has very high catalytic activity on cracking of 2, 5-dimethyl piperazine.

Description

technical field [0001] The invention belongs to the technical field of organic synthesis, and in particular relates to a method for producing isopropanolamine and 1,2-propanediamine by cracking 2,5-dimethylpiperazine. Background technique [0002] 1,2-Propylenediamine is an organic chemical intermediate and raw material with a wide range of uses. There are important applications in the field, and its derivatives can also be used as rubber, coatings, raw materials, chelating agents and mineral processing agents, as well as the production of 1,2-propylenediaminetetraacetic acid as an intermediate for anticancer drug propyleneimine. [0003] Because isopropanolamine is less harmful to the environment and the human body, it has gradually become a green chemical product highly recommended and encouraged by developed countries. Isopropanolamine is used in the synthesis of textile auxiliaries (finishing agents, antistatic agents, dyeing auxiliaries, penetrating agents), emulsifier...

Claims

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Application Information

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IPC IPC(8): C07C209/62C07C211/11C07C213/00C07C215/08B01J23/89B01J35/10
CPCC07C209/62C07C213/00B01J23/892B01J35/635B01J35/633B01J35/615C07C211/11C07C215/08
Inventor 陈国华郭文杰曹振力
Owner 山东达民化工股份有限公司
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