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Green continuous process and device for purifying amino-dodecanoic acid product

A technology of aminododecanoic acid and products, which is applied in the field of green continuous process and equipment, to achieve the effects of high purity, color removal and energy consumption reduction

Pending Publication Date: 2020-04-14
WUXI YINDA NYLON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present invention uses water as a solvent to purify the product through processes such as pressurized heating and dissolving, adsorption + filtration combined separation, limited cooling, fractional crystallization, aging crystal growth, etc., without using organic solvents, and the produced process water is recycled , no waste water discharge, not only can produce safely, but also solve the problem of reducing environmental pollution, so as to be green and pollution-free; at the same time, recycle heat energy to reduce production costs

Method used

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  • Green continuous process and device for purifying amino-dodecanoic acid product
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  • Green continuous process and device for purifying amino-dodecanoic acid product

Examples

Experimental program
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Effect test

Embodiment 1

[0067] A green continuous process for purifying aminododecanoic acid product, comprising the following steps:

[0068] (1) Put 100kg of aminododecanoic acid crude product and water into the slurry mixer at a ratio of 1:9, and stir well;

[0069] (2) Turn on nitrogen and pressurize to 0.21MPa, press the mixed material liquid into the heating melting processor at a speed of 9kg / h for heating and dissolving, make it reach the required temperature of 120°C, and then send the dissolved material liquid to the adsorption bed;

[0070] (3) Regulating the discharge temperature of the heating-up melting processor, so that the temperature of the feed liquid in the adsorption bed is 119° C., and the filtration of the fatty acid derivative and the desorption of char and pigment are carried out;

[0071] (4) Cool down by 4°C from the adsorption bed through the first pre-crystallizer, and the feed liquid slowly forms crystal nuclei during the cooling process;

[0072] The temperature of th...

Embodiment 2

[0076] With the same process conditions as in Example 1, the aminododecanoic acid crude product was purified by batching in another slurry mixer (the difference: the centrifuged liquid in the liquid collection tank was used for batching at 1:9), centrifugal sampling analysis (2#) Relevant index detection is shown in Table 2;

Embodiment 3

[0078] Continue to repeat the operation of embodiment 2, denoted as 3#, centrifuge sampling analysis test result relevant index detection is shown in Table 2:

[0079] After the above slurry ingredients are alternately used and cycled 11 times, adjust the pH value of the regeneration treatment solution to 9, regenerate the adsorption bed, circulate at a speed of 30kg / h, and regenerate at a temperature of 90°C for 140 minutes. Rinse with a little clean water. End when the pH value is 7;

[0080] Regeneration is completed, operate according to the process conditions of the above-mentioned embodiment 1, and the ingredients are purified to the crude product, and the relevant index detection of centrifugal sampling analysis (4#, 5#) is shown in Table 2:

[0081] Under different conditions, after refining and purifying the aminododecanoic acid crude product, the analysis results of 5 times were compared, and the results are shown in Table 2:

[0082] Table 2 Aminododecanoic acid qu...

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Abstract

The invention belongs to the technical field of fine chemical products, and particularly relates to a green continuous process and device for purifying an amino-dodecanoic acid product. The device isused for purifying an amino-dodecanoic acid product, and comprises a slurry mixer, a heating melting processor, an adsorption bed, a pre-crystallizer, a crystal growing device, a centrifugal machine,a liquid collecting tank, a regeneration treatment liquid tank and a purified water tank. According to the method, the product is purified by taking water as a solvent and utilizing the procedures ofpressurizing, heating, dissolving, adsorption and filtration combined separation, limited cooling, fractional crystallization, aging and crystal growing and the like, an organic solvent is not used, the generated process water is recycled, no wastewater is discharged, safe production can be realized, the problem of environmental pollution is solved, the method is green and pollution-free; meanwhile, heat energy is recycled, and the production cost is reduced. The method is high in product purity and simple and convenient to operate, water is used as a solvent, the generated liquid is recycledas process water, no pollution is caused to the environment, most of heat energy is reutilized, and the method belongs to an economic and environment-friendly process.

Description

technical field [0001] The invention belongs to the technical field of fine chemical products, and in particular relates to a green continuous process and device for purifying aminododecanoic acid products. Background technique [0002] Nylon 12 has a wide range of uses, mainly used in marine pipes, urban natural gas pipes, automotive fuel delivery pipes, automobile brake pipes, air conditioning pipes, air compressor hoses, industrial high-pressure hydraulic pipes, pipe quick connectors, automotive Anti-lock brake system helical shaft, precision gears, sliding parts of cams and bearings, antistatic rollers for copiers, antistatic capacitors and IC chip guide rails, optical cable sheaths, transparent pipes, self-adhesive wire paint, noise reduction gears, sports shoe soles , Cable deduction, tennis racket deduction and many other aspects. [0003] Aminododecanoic acid is a monomer for synthesizing nylon 12. At present, there are limited methods for synthesizing aminododecano...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C227/40C07C227/42C07C229/08
CPCC07C227/40C07C227/42C07B2200/13C07C229/08
Inventor 陈尚标秦昌成胡瑞莉殷炼伟
Owner WUXI YINDA NYLON
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