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Separation and purification system of organic synthesis feed liquid and separation and purification method thereof

A separation and purification, organic synthesis technology, applied in the chemical industry, can solve the problems of separation and purification operation yield and purity contribution

Inactive Publication Date: 2014-12-03
CHONGQING UNISPLENDOUR CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

China's authorized patent CN1331844C discloses a preparation process of iminodiacetonitrile, which has a final yield of more than 90% and a purity of more than 98%. According to its examples, it can be seen that the improvement of its final yield and purity mainly depends on Due to the control of the synthesis reaction conditions, the final separation and purification operation does not contribute to the yield and purity, because it uses conventional separation and purification devices and methods

Method used

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  • Separation and purification system of organic synthesis feed liquid and separation and purification method thereof
  • Separation and purification system of organic synthesis feed liquid and separation and purification method thereof
  • Separation and purification system of organic synthesis feed liquid and separation and purification method thereof

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Embodiment 1

[0103] Refer to the following Figure 8-11 Preferred embodiments of the present invention are described in detail. The organic synthesis material liquid of iminodiacetonitrile in this example is obtained according to the production method of patent CN1331844C; the sulfuric acid added below is used for the neutralization of ammonia in the reaction system. The operation of not specifying specific conditions in the embodiment is carried out according to conventional operating conditions.

[0104] The material extracted from the iminodiacetonitrile reactor (material code: FED1, wherein the iminodiacetonitrile content is 300g / L, temperature 65°C, pH=7.0) is dissolved in 10.5m 3 The speed of / h is continuously sent into the batching tank 5, and the material continuously sent simultaneously also includes: product centrifugal filter cake washing liquid and secondary thickener underflow mixed solution (material code name: FED2; wherein iminodiacetonitrile content is 50g / L, temperatu...

Embodiment 2

[0115] Refer to the following Figure 8-11 Preferred embodiments of the present invention are described in detail. The organic synthesis material liquid of iminodiacetonitrile in this example is obtained according to the production method of patent CN1331844C; the sulfuric acid added below is used for the neutralization of ammonia in the reaction system. The operation of not specifying specific conditions in the embodiment is carried out according to conventional operating conditions.

[0116] The material extracted from the iminodiacetonitrile reaction system (material code: FED1, wherein the iminodiacetonitrile content is 300g / L, the temperature is 65°C, the pH=7.0) is 10.5m 3 The rate of / h is continuously sent to the batching tank 5. At the same time, the continuously fed materials also include: the product centrifugal filter cake washing liquid mixed with the bottom flow of the secondary thickener, and the clear liquid obtained after filtration (material code: FED2; the...

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Abstract

The invention aims at the field of chemical industry and relates to a separation and purification system of organic synthesis feed liquid and a separation and purification method of the organic synthesis feed liquid. The separation and purification system comprises a crystallization system and a solid-liquid separation system which are sequentially arranged from front to back, wherein the crystallization system comprises a mixed suspension-mixed product-removal (MSMPR) crystallizer and a draft-tube-baffled (DTB) crystallizer which are connected with each other in series; the separation and purification system also comprises a liquid processing system used for processing waste liquid produced by the solid-liquid separation system; the liquid processing system comprises a desalting device and a membrane concentration device which are sequentially arranged from front to back. By virtue of the separation and purification system of the organic synthesis feed liquid and the separation and purification method thereof, the organic synthesis feed liquid is separated and purified by using a continuous crystallization technology, an electrodialysis technology and a membrane separation and concentration technology; the produced waste liquid is fully recycled and used, so that the separation and purification efficiency is improved, the purity and the yield of products are improved and the discharge of the waste liquid is reduced; the separation and purification system of the organic synthesis feed liquid and the separation and purification method thereof are strong in production industrialization and low in costs, and are especially suitable for producing iminodiacetonitrile.

Description

technical field [0001] The invention aims at the field of chemical industry, and relates to a separation and purification system and a separation and purification method for organic synthesis material liquid. Background technique [0002] Organic synthesis reaction is a main way for the chemical industry to obtain the target product, and the reaction feed liquid system after the reaction is mainly composed of the target product, residual raw materials and by-products. In industry, how to separate and purify the reaction feed liquid to obtain the target product with high efficiency and high purity, and recycle the waste liquid and waste residue to the maximum extent are closely related to the efficiency and cost of industrial production. Moreover, compared with large-scale industrial production, the latter's parameter control and uniformity control of the reaction system are also more difficult. Therefore, how to design a system that can efficiently separate and purify organ...

Claims

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Application Information

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IPC IPC(8): B01D9/02B01D36/00B04B5/10C02F9/02C02F9/06C07C253/34C07C255/24C01C1/24
CPCY02A20/124
Inventor 韦异勇徐征覃玉芳耿明刚金海琴刘桢
Owner CHONGQING UNISPLENDOUR CHEM
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