A method and system for vacuum distillation deamination of n,n-dimethyldecylamide

A technology of dimethyldecylamide and dimethylamine, which is applied in the field of N, can solve the problems of poor quality, yellowing of color, etc., and achieve the effect of low cost, good deamination effect, and reasonable and effective method

Active Publication Date: 2016-08-24
NANTONG WANNIANCHANG PHARMA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of N, the method for N-dimethyldecylamide vacuum distillation deamination, to solve existing in the prior art N, the N-dimethyldecylamide product contains dimethylamine, causes The color turns yellow and the quality deteriorates

Method used

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  • A method and system for vacuum distillation deamination of n,n-dimethyldecylamide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Deamination of N,N-dimethyldecylamide product.

[0024] The N,N-dimethyldecylamide containing dimethylamine is sucked into the distillation still by a vacuum pump; under vacuum conditions, the circulating material pump is turned on to carry out vacuum distillation of the material in the still, and the distillation is carried out through a spray tower. The distillate of the still is sprayed and circulated, the vacuum distillation temperature is controlled at 50°C, and the vacuum degree is controlled at -0.09Mpa; the components distilled from the still are connected to a dimethylamine absorption device to absorb dimethylamine; sampling and analysis are performed until the sample No dimethylamine, cooled to normal temperature, and discharged to obtain N,N-dimethyldecylamide product without dimethylamine.

Embodiment 2

[0026] Deamination of N,N-dimethyldecylamide product.

[0027] The N,N-dimethyldecylamide containing dimethylamine is sucked into the distillation still by a vacuum pump; under vacuum conditions, the circulating material pump is turned on to carry out vacuum distillation of the material in the still, and the distillation is carried out through a spray tower. The distillate of the still is sprayed and circulated, the vacuum distillation temperature is controlled at 30°C, and the vacuum degree is controlled at -0.20Mpa; the components distilled from the still are connected to a dimethylamine absorption device to absorb dimethylamine; sampling and analysis are performed until the sample No dimethylamine, cooled to normal temperature, and discharged to obtain N,N-dimethyldecylamide product without dimethylamine.

Embodiment 3

[0029] Deamination of N,N-dimethyldecylamide product.

[0030] The N,N-dimethyldecylamide containing dimethylamine is sucked into the distillation still by a vacuum pump; under vacuum conditions, the circulating material pump is turned on to carry out vacuum distillation of the material in the still, and the distillation is carried out through a spray tower. The distillate of the still is sprayed and circulated, the vacuum distillation temperature is controlled at 40°C, and the vacuum degree is controlled at -0.10Mpa; the components distilled from the still are connected to a dimethylamine absorption device to absorb dimethylamine; sampling and analysis are performed until the sample No dimethylamine, cooled to normal temperature, and discharged to obtain N,N-dimethyldecylamide product without dimethylamine.

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Abstract

The invention provides a method for vacuum distillation and deamination of N,N-dimethyldecylamide and a system thereof, comprising the following steps: sucking N,N-dimethyldecylamide containing dimethylamine into a distillation kettle through a vacuum pump Inside; under vacuum conditions, turn on the circulating material pump, carry out vacuum distillation on the material in the still, and spray and circulate the fraction of the still through the spray tower; the components distilled out of the still are connected to dimethylamine for absorption The device absorbs dimethylamine; sampling analysis, until the sample has no dimethylamine, cools to normal temperature, discharges, and obtains N,N-dimethyldecylamide product without dimethylamine. In the present invention, under vacuum conditions, the N,N-dimethyldecylamide material containing dimethylamine is subjected to vacuum distillation by using a distillation still, and a spray tower is used to spray and circulate, so as to ensure the vacuum degree of the distillation deamination device, Can effectively remove dimethylamine in N,N-dimethyldecylamide. The method of the invention is reasonable and effective, has low cost and good deamination effect.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a method for vacuum distillation deamination of N,N-dimethyldecylamide and a system used therefor. Background technique [0002] N,N-Dimethyldecylamide, colorless transparent liquid, use: surfactant; organic synthesis solvent used in medicine, veterinary medicine, pesticide, cosmetics, etc. [0003] N,N-Dimethyldecylamide is generally obtained by reacting capric acid and dimethylamine to obtain the crude N,N-dimethyldecylamide, and then obtain N,N-dimethyldecanoamide with a purity of not less than 99% after rectification under reduced pressure. Methyldecylamide product. However, because it contains a small amount of dimethylamine, it has obvious amine smell, and it is easy to turn yellow in color and deteriorate in quality after a long time. [0004] The quality standard of the finished product of N, N-dimethyldecylamide requires colorless to light yellow ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C231/24C07C233/05B01D3/10
Inventor 姜明许陈兵鲍烨华于广顾理群鲍甜甜张玲丽
Owner NANTONG WANNIANCHANG PHARMA
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