A kind of extraction method of 1,5-pentanediamine

A technology of pentamethylenediamine and pentamethylenediamine salt, which is applied in the field of extracting 1,5-pentanediamine, can solve the problems of high cost, low recovery rate, complicated process, etc., and achieve improved conversion rate, increased yield, and simplified process The effect of steps

Active Publication Date: 2020-06-05
CATHAY R&D CENT CO LTD +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the defects of complex process, high cost and low recovery rate in the existing purification and extraction process of pentamethylenediamine, the object of the present invention is to provide a method for extracting 1,5-pentanediamine method

Method used

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  • A kind of extraction method of 1,5-pentanediamine

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Effect test

Embodiment 1

[0093] The 1,5-pentanediamine concentration of 1,5-pentamethylenediamine was determined to be 15.1% in the concentrated solution of 1,5-pentamethylenediamine sulfatase conversion liquid with 1000 kg of lysine decarboxylase cells. Add 110kg of calcium oxide powder (content above 95%), control the temperature at about 90°C, stir thoroughly for 180 minutes, and then gradually send the resulting mixed solution system into figure 1 The combination of pentamethylenediamine extraction devices shown in the figure has a rotating speed of 20rpm, a vacuum degree of -0.09~-0.08Mpa is controlled, a heat conduction oil temperature is 200°C, and evaporated gas condensate is collected. The final yield of 1,5-pentanediamine was 95.6%, and loose solid powder remained in the paddle vacuum drying device without agglomeration and wall formation.

Embodiment 2

[0095] The 1,5-pentanediamine concentration of 600kg of the 1,5-pentanediamine carbonatase conversion liquid concentrate with lysine decarboxylase cells was determined to be 25%. Add 102kg of calcium oxide powder (content above 95%), control the temperature at 80-90°C, fully stir for 120 minutes, then gradually send the resulting mixed solution system into a rake-type vacuum dryer (ZPG-1000) to heat, stir and evaporate at a speed of 12rpm , control the vacuum degree -0.095~-0.09Mpa, the temperature of the material in the barrel is 170°C±10°C, and collect the evaporated gas condensate. The final yield of 1,5-pentanediamine was 93.9%. Loose solid powder remains in the rake vacuum dryer without agglomeration and wall formation.

Embodiment 3

[0097] The mixed solution of 600kg 1,5-pentamethylenediamine phosphate and 1,5-pentamethylenediamine hydrochloride enzymatic conversion solution (the molar ratio of pentamethylenediamine contained in the two salts is 1:1), and the determination of 1,5 - Total concentration of pentamethylenediamine 31%. According to the effective molar concentration of 1,5-pentamethylenediamine and magnesium hydroxide 1:1.1, add magnesium hydroxide powder (content above 98%), control the temperature at 80-90°C, stir thoroughly for 120 minutes, and then gradually mix the obtained mixed solution system feed into figure 1 The combination of pentamethylenediamine extraction devices shown, the speed is 15rpm, the vacuum degree is controlled to -0.095Mpa, the temperature of the material in the barrel is 170°C±10°C, and the evaporated gas condensate is collected. The final yield of 1,5-pentanediamine was 92%, and loose solid powder remained in the rake vacuum dryer without agglomeration and wall form...

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Abstract

The invention provides a method of extracting 1,5-pentanediamine from a 1,5-pentanediamine salt solution system. An alkaline compound is added into the 1,5-pentanediamine salt solution system to form a solution system containing free-state 1,5-pentanediamine, and then the solution system containing the free-state 1,5-pentanediamine is distilled / evaporated in a paddle dryer or a rake dryer. The 1,5-pentanediamine salt at least comprises one or more of 1,5-pentanediamine sulfate, carbonate and phosphate. The alkaline compound at least comprises solid-state calcium hydrate, magnesium hydroxide, calcium oxide and magnesium oxide. The method is high in practicality, simple and convenient to operate and environmentally friendly, and obviously reduces the raw material cost and operation cost of the whole process. The 1,5-pentanediamine recovery rate of the method is high. The method is environmentally friendly and more suitable for industrial production.

Description

technical field [0001] The invention relates to the field of separation and purification of chemical products, in particular to a method for extracting 1,5-pentanediamine from a solution system containing 1,5-pentanediamine salt. Background technique [0002] Pentamethylenediamine (ie, 1,5-pentanediamine, 1,5-diaminopentane, cadaverine) is an important polymer monomer. Starting from 1,5-pentamethylenediamine, a series of polyamides can be synthesized, such as polyamide 56, polyamide 510, etc., or polyester amide products, which are widely used in textiles, electronic appliances, mechanical equipment, automobiles and other fields. [0003] The production and purification patents of 1,5-pentanediamine include the following reports: [0004] In the patent CN101981202A, 1,5-pentanediamine is produced by direct fermentation. The fermentation broth was refluxed at 103°C for 5 hours to crack the by-products in the fermentation broth, and then extracted with butanol several times,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C209/86C07C211/09
CPCC07C209/86C07C211/09
Inventor 戴端芳秦兵兵杨晨刘修才
Owner CATHAY R&D CENT CO LTD
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