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Synthetic process for yellow inhibitor HN-130

A synthesis process and technology of anti-yellowing agent, applied in the field of HN-130 anti-yellowing agent synthesis process, can solve the problems such as the inability of stable production of HN-130 anti-yellowing agent, and achieve the effects of high crystallinity, short melting range and high purity

Inactive Publication Date: 2013-04-03
XIAN HANGJIE CHEM TECH
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AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the HN-130 anti-yellowing agent cannot be stably produced in the existing technology, the present invention provides a synthesis process of the HN-130 anti-yellowing agent

Method used

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Examples

Experimental program
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Embodiment Construction

[0026] 1.1] Material dissolution:

[0027] 1.1.1 Dissolution of HDI: Accurately weigh 100g of HDI, add it into a 1L three-necked flask (namely reactor No. 1), and add 400mL of solvent (one or more of methanol, trichloroethylene, acetonitrile or formaldehyde) into the three-necked flask ), timed and stirred for 30 minutes to make it fully mixed to make HDI solution;

[0028] 1.1.2 Dissolution of unsymmetrical dimethylhydrazine: Accurately weigh 73g of unsymmetrical dimethylhydrazine (content ≥ 99%), add it into another 1L three-necked flask (namely reactor No. 2), and add 400mL solvent into the three-necked flask (one or more of methanol, trichloroethylene, acetonitrile or formaldehyde), timed and stirred for 30 minutes to make it fully mixed to make unsymmetrical dimethylhydrazine solution;

[0029] 1.2] dropwise synthesis:

[0030] 1.2.1 Add the HDI solution into a 250mL constant pressure funnel, and add it dropwise to the unsymmetrical dimethylhydrazine solution. During t...

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Abstract

The invention relates to a synthetic process for a yellow inhibitor HN-130. The synthetic process comprises the following steps: 1) preparation of reaction raw materials and dissolving of the materials, wherein the raw materials comprise HDI, unsymmetrical dimethylhydrazine and a polar solvent, a mass ratio of HDI to unsymmetrical dimethylhydrazine is 100: 70-76, mass percent of a solvent in the polar solvent is no less than 97%, and mass percent of water in the solvent is no more than 1%; 2) synthesis; 3) discharging: a step of separating reactants with a separator and collecting a solid so as to obtain a yellow inhibitor HN-130 containing a trace amount of the solvent; and 4) oven-drying: a step of drying the yellow inhibitor HN-130 containing a trace amount of the solvent obtained in step 3) with a vacuum drying device at a temperature below 60 to 110 DEG C for 4 to 8 h so as to obtain the yellow inhibitor HN-130. The synthetic process provided by the invention overcomes the problem of incapability of stable production of the yellow inhibitor HN-130 in the prior art; the polar solvent is used as a solvent in the invention to substitute toluene in the prior art, so the risks of burning and explosion caused by static electricity during centrifugal discharging are reduced.

Description

technical field [0001] The invention relates to a synthesis process of HN-130 anti-yellowing agent. Background technique [0002] HN-130 anti-yellowing agent is an upgraded product of HN-150 anti-yellowing agent, which is used to prevent the yellowing of spandex fiber. Its effective content per unit mass is 36% higher than that of HN-150 anti-yellowing agent, and the market prospect is good. However, it is impossible to stably produce qualified products with the existing technology. Contents of the invention [0003] In order to solve the problem that the HN-130 anti-yellowing agent cannot be stably produced in the prior art, the invention provides a synthesis process of the HN-130 anti-yellowing agent. [0004] Technical solution of the present invention: [0005] The present invention has advantages: [0006] The synthesis process of HN-130 anti-yellowing agent, its special feature, includes the following steps: [0007] 1] Preparation: [0008] 1.1] Reaction raw m...

Claims

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Application Information

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IPC IPC(8): C07C281/06
Inventor 何宇许峰闫小宁吉卉白海龙李军平姚忠东王卫国郭友李军锋杨玲
Owner XIAN HANGJIE CHEM TECH
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