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Preparation method of dibasic acid amine salt, dibasic acid amine salt solution, dibasic acid amine salt and polymer

A technology of dibasic acid amine salt and dibasic acid salt, which is applied in the field of high-quality dibasic acid amine salt, and can solve problems such as complexity, high cost of polymerization products, and high cost

Active Publication Date: 2020-08-28
CATHAY R&D CENT CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention solves the problem that the preparation method of polymer grade dibasic acid and polymer grade amine monomer in the prior art is complicated in operation, complicated in purification operation, high in cost and low in yield, resulting in high cost of polymerized products for industrial application.

Method used

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  • Preparation method of dibasic acid amine salt, dibasic acid amine salt solution, dibasic acid amine salt and polymer
  • Preparation method of dibasic acid amine salt, dibasic acid amine salt solution, dibasic acid amine salt and polymer

Examples

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Effect test

Embodiment 1

[0081] The electrodialysis device includes: negative membranes 71 and positive membranes 72, and the negative membranes 71 and positive membranes 72 are arranged alternately to form concentrating chambers and desalination chambers, and the concentrating chambers and desalination chambers are arranged alternately. In this embodiment, there is no limitation on the number of positive and negative membranes.

[0082] Meanwhile, the concentration chambers 51 , 52 , 53 , 54 are connected to the feed ports 11 , 12 , 13 , 14 respectively, and the desalination chambers 61 , 62 , 63 are connected to the feed ports 21 , 22 , 23 respectively. The concentrating pipes 32 and 33 for discharging the concentrated liquid communicate with the concentrating chambers 52 and 53 respectively. Those skilled in the art understand that the electrodialysis device also includes two electrode chambers 41 and 42 on both sides.

[0083] Feed inlets 11, 12, 13, 14 feed water, feed inlets 21, 22, 23 respecti...

Embodiment 2

[0085] Preparation of pentamethylenediamine adipate

[0086] (1) Get 1,5-pentamethylenediamine sulfatase conversion solution for subsequent use (wherein the concentration of 1,5-pentamethylenediamine ion is 7wt%, pH value is 6.5, 1,5-pentamethylenediamine sulfatase conversion solution Color: dark brown, purchased from Kaisai (Jinxiang) Biomaterials Co., Ltd.).

[0087] React with adipic acid and ammonia in water to configure ammonium adipate solution (the mass concentration of ammonium adipate in the ammonium adipate solution is 10wt%, and the pH value is 6.8.)

[0088] (2) Ammonium adipate solution and 1,5-pentamethylenediamine sulfatase conversion solution are passed through the desalination chamber of the electrodialysis device as implementing 1, wherein, 1,5-pentamethylenediamine sulfatase conversion solution is passed into The desalination chamber 62 and the desalination chamber 61,63 that pass into the ammonium adipate solution are arranged at intervals. 5wt% sodium su...

Embodiment 3

[0092] Preparation of pentamethylenediamine sebacate

[0093] (1) Take 1,5-pentamethylenediamine sulfatase conversion solution (wherein the concentration of 1,5-pentamethylenediamine ion is 4wt%, pH value is 6.5, color: dark brown, purchased from Kaisai (Jinxiang) Biomaterials Limited);

[0094] Use sebacic acid and ammonia to react in water to prepare an ammonium sebacate solution (the concentration of ammonium sebacate in the ammonium sebacate solution is 7.9 wt%, and the pH value is 7.0).

[0095] (2) ammonium sebacate solution and 1,5-pentamethylenediamine sulfatase conversion solution are passed through the desalination chamber of the electrodialysis device as implementing 1, wherein, feed 1,5-pentamethylenediamine sulfatase conversion solution The desalination chamber 62 and the desalination chamber 61,63 that pass into the ammonium sebacate solution are arranged at intervals. 5wt% sodium sulfate aqueous solution is passed into the pole chamber 41 and the pole chamber ...

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Abstract

The invention provides a preparation method of a dibasic acid amine salt, a dibasic acid amine salt solution, a dibasic acid amine salt and a polymer obtained by polymerization. The preparation methodof the dibasic acid amine salt comprises the following steps: respectively introducing a mixture containing 1, 5-pentanediamine salt and a mixture containing dibasic acid salt into desalination chambers of the electrodialysis device, arranging the two desalination chambers at an interval, and obtaining a purified dibasic acid amine salt solution from a part of a concentration pipe communicated with a concentration chamber of the electrodialysis device. The method directly aims at the mixture which contains various impurities and is complex in system and contains the 1.5-pentanediamine salt and the mixture containing the dibasic acid salt, and can effectively reduce the impurity content and chromaticity of the dibasic acid amine salt product through electrodialysis treatment. The inorganicacid salt after electrodialysis can be applied to the next fermentation process, and the atom utilization rate is high. The method effectively solves the problems of complex preparation and purification processes, high cost and low yield of polymer-grade dibasic acid and polymer-grade amine monomers in the prior art.

Description

technical field [0001] The invention relates to a method for preparing a high-quality dibasic acid amine salt by electrodialysis. Background technique [0002] Dibasic acid amine salt (also known as polyamide salt or nylon salt) is the precursor of polyamide synthesis. Polyamides generally use amines and dibasic acids as monomer raw materials, which are mixed to form dibasic acid amine salts, and then polymerized to obtain polymers; the premise of this preparation process is: monomeric amines and dibasic acids must be Polymer grade products can ensure that the obtained polyamide has industrial application value. [0003] However, the preparation of polymer grade dibasic acid and amine is complex and costly. Taking dibasic acids as an example, most of the existing dibasic acids are produced by biological fermentation methods, and are extracted from the fermentation broth through various complex extraction and purification methods to obtain polymer grade dibasic acids. Gene...

Claims

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Application Information

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IPC IPC(8): C07C51/42C07C55/21C07C55/02C07C55/14C07C55/20C07C209/00C07C211/09C08G69/08
CPCC07C51/42C07C55/21C07C55/02C07C55/14C07C55/20C07C209/00C07C211/09C08G69/08Y02A20/124
Inventor 秦兵兵杨晨董筱雯刘修才
Owner CATHAY R&D CENT CO LTD
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