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A kind of synthetic technique of diethyltoluenediamine

A technology of diethyltoluenediamine and toluenediamine, applied in the chemical field, can solve the problems of low catalytic activity, strong toxicity, high price, etc., and achieve the effects of overcoming easy coking, easy control, and mild reaction conditions

Active Publication Date: 2022-03-22
ANYANG INST OF TECH
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  • Description
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  • Application Information

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Problems solved by technology

The invention overcomes the disadvantages of the traditional synthesis of DETDA aluminum-based catalysts such as low catalytic activity, easy coking, high price, and strong toxicity. 180 °C, the comprehensive benefit evaluation of the process scheme found that 3% CeO 2 doped CeO 2 -CuO / ZnO / Al 2 o 3 Highest catalytic activity

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  • A kind of synthetic technique of diethyltoluenediamine
  • A kind of synthetic technique of diethyltoluenediamine

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Embodiment Construction

[0024] 1. Control cabinet, 2. High-pressure reaction kettle, 3. Toluenediamine feeding pump, 4. Toluenediamine storage tank, 5. Transfer tank, 6. Distillation tower, 7. Bottom reflux pump, 8. Boiler, 9. Tower bottom product storage tank, 10. Tower top total condenser, 11. Tower top reflux pump, 12. Tower top storage tank, 13. Toluenediamine circulation pump, 14. Rectification feed pump

[0025] to combine Figure 1~2 , a kind of catalytic synthesis diethyltoluenediamine process of the present invention, under the condition of 80 ℃ constant temperature water bath, prepare the aqueous solution of copper nitrate, zinc nitrate, aluminum nitrate, cerium nitrate, according to molar ratio n (硝酸铜) :n (硝酸锌) :n (硝酸铝) :n (硝酸铈) =1:1:2:0.06, that is, the molar ratio of copper nitrate, zinc nitrate, aluminum nitrate, and cerium nitrate is 1:1:2:0.06, the solution is blue, fully stirred for 0.5 h, and then according to the molar ratio n (柠檬酸) :n (硝酸铜+硝酸锌+硝酸铝+硝酸铈) =1.2:1, that is, the m...

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Abstract

The present invention relates to a kind of synthetic technology of diethyltoluenediamine, adopts sol-gel method to prepare catalyst CeO 2 ‑CuO / ZnO / Al 2 o 3 , according to the metal atom molar ratio n (toluenediamine): n (ethylene): n (catalyst) = 1.1: 2.2: 0.05 feeding, feed H into the autoclave 2 To reduce and activate the catalyst, pour in toluene diamine (TDA), stir well, pass in ethylene gas, replace H 2 , the temperature was programmed to rise to 220-230°C, the reaction pressure was maintained at 3.0 MPa, and the reaction time was 3 h. Add an appropriate amount of water in the autoclave, and distill under reduced pressure to obtain diethyltoluenediamine (DETDA). The selectivity and yield of diethyltoluenediamine (DETDA) prepared by this method are 85.2%, 93.7% respectively , the purity is 99.1%, the quality has reached the national quality standard, and it is a green and environmentally friendly clean production process.

Description

technical field [0001] The present invention relates to the synthetic technique of diethyltoluenediamine, specifically refers to catalyst CeO 2 -CuO / ZnO / Al 2 o 3 The invention discloses a process for catalytically synthesizing diethyltoluenediamine, which belongs to the field of chemistry. Background technique [0002] There are two types of amine chain extenders, aliphatic amines and aromatic amines. 3,3'-dichloro-4,4'-diaminodiphenylmethane (MOCA) used to occupy the dominant position of aromatic amine chain extenders, although the obtained The product has good mechanical properties. According to the latest clinical findings, 3,3'-dichloro-4,4'-diaminodiphenylmethane (MOCA) has certain carcinogenicity and is harmful to people's physical and mental health. Some countries in Europe and the United States have Strictly restricting its use, the development of new environmentally friendly aromatic amine chain extenders has gradually become an urgent task in the modern chemical...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C209/68C07C211/51B01J23/83
CPCC07C209/68B01J23/002B01J23/83B01J2523/00C07C211/51B01J2523/17B01J2523/27B01J2523/31B01J2523/3712
Inventor 贾太轩王鑫杨立国张允宋海香侯绍纲
Owner ANYANG INST OF TECH