Temperature-sensitive type amino resin, manufacturing method and application of amino resin

A temperature-sensitive, amino resin technology, applied in chemical instruments and methods, other chemical processes, water/sludge/sewage treatment, etc., can solve the problems of long regeneration time, expensive polymer chelating resin, etc., and achieve cost Low, easy to quickly regenerate and recycle, the effect of strong adsorption capacity

Inactive Publication Date: 2017-08-11
ETERNAL CHEM (CHINA) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, studies on the adsorption of cerium ions in water by polymer chelating resins have been carried out at home and abroad. These chelating resins can chelate with cerium ions, have a large adsorption capacity, have a good effect of separating and extracting cerium ions in water, and are easy to operate. , no secondary pollution, etc., but the price of polymer chelating resin is more expensive, and the regeneration time is longer

Method used

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  • Temperature-sensitive type amino resin, manufacturing method and application of amino resin
  • Temperature-sensitive type amino resin, manufacturing method and application of amino resin
  • Temperature-sensitive type amino resin, manufacturing method and application of amino resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Step 1, the temperature-sensitive amino resin that the molar ratio of synthesizing formaldehyde and urea is 1.0.

[0057] Add 406.3g of 37% formaldehyde solution into a 1L four-neck flask, add the first batch of urea 103.9g, and stir at 25°C. After the urea is completely dissolved, adjust the pH value to 7.5 with a small amount of ammonia water, mix and stir, and heat up to After 95°C, react for one hour; adjust the pH value to 6.0 with a small amount of ammonium chloride, and continue the reaction for 1 hour; cool down to 85°C, add the second batch of urea 196.4g, adjust the pH to 4.0, and react for 50 minutes; cool down to 40°C, react end to obtain a temperature-sensitive amino resin, with such figure 1 The microstructure shown and figure 2 temperature sensitivity characteristics shown.

[0058] Step 2, using temperature-sensitive amino resin as an adsorbent to adsorb cerium ions in water.

[0059] Adsorption was carried out on a constant temperature shaker. The ...

Embodiment 2

[0061] Step 1, the temperature-sensitive amino resin that the molar ratio of synthesizing formaldehyde and urea is 1.0.

[0062] Add 406.3g of 37% formaldehyde solution into a 1L four-neck flask, add the first batch of urea 106.9g, and stir at 25°C. After the urea is completely dissolved, adjust the pH value to 8.0 with a small amount of ammonia water, mix and stir, and heat up to After 90°C, react for one hour; adjust the pH value to 6.5 with a small amount of ammonium chloride, and continue the reaction for 1 hour; cool down to 85°C, add the second batch of urea 193.4g, adjust the pH to 4.5, and react for 30 minutes; cool down to 40°C, react The end result is a temperature-sensitive amino resin.

[0063] Step 2, using temperature-sensitive amino resin as an adsorbent to adsorb cerium ions in water.

[0064] Adsorption was carried out on a constant temperature shaker. The initial concentration of cerium ions is 100mg / L, the pH value of the solution is 4.5, and the adsorptio...

Embodiment 3

[0066] Step 1, the temperature-sensitive amino resin that the molar ratio of synthesizing formaldehyde and urea is 1.0.

[0067] Add 406.3g of 37% formaldehyde solution into a 1L four-necked flask, add the first batch of urea 100.3g, and stir at 25°C. After the urea is completely dissolved, adjust the pH value to 7.5 with a small amount of ammonia water, mix and stir, and heat up to After 98°C, react for one hour; adjust the pH value to 6.0 with a small amount of ammonium chloride, and continue the reaction for 1 hour; cool down to 85°C, add the second batch of urea 200g, adjust the pH to 4.0, and react for 70 minutes; cool down to 40°C, and the reaction ends A temperature-sensitive amino resin is obtained.

[0068] Step 2, using temperature-sensitive amino resin as an adsorbent to adsorb cerium ions in water.

[0069] Adsorption was carried out on a constant temperature shaker. The initial concentration of cerium ions is 100mg / L, the pH value of the solution is 4.5, and the...

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Abstract

The invention provides temperature-sensitive type amino resin, a manufacturing method and application of the amino resin, the temperature-sensitive type amino resin is obtained by an 'alkali-acid' two-step technology and used for extracting cerium ions from water. Through absorption, the coordination effect occurs to the temperature-sensitive type amino resin and the cerium ions to form a chelate, and the purpose of extracting the cerium ions from water is realized. By the aid of reversible 'dissolution-precipitation' temperature sensitivity of the resin under the 'heating-cooling' condition, the resin and the cerium ions are separated by 'liquid-liquid' extraction, rapid regeneration and recycling of the resin are facilitated, secondary pollution caused to the environment is greatly reduced when the resin is taken as solid waste, and at the same time, the subsequent reextraction treatment process of the cerium ions is benefited. The method combines the advantages of absorption and extraction separation for extraction of the cerium, the raw materials are easy to obtain, the preparation method is simple, the cost is low, the operation is simple, and the treatment effect and the economical benefit are remarkable.

Description

technical field [0001] The invention relates to a temperature-sensitive amino resin in the field of green metallurgy and a method for extracting cerium ions in water by using the temperature-sensitive amino resin as an adsorbent. Background technique [0002] The vast majority of rare earth production and sales in the world are completed in China. The rare earth smelting industry represented by cerium has brought a certain degree of environmental pollution. However, at present, terminal treatment is mainly used. The cost of pollution treatment is relatively high, and valuable resources have not been effectively obtained. Recycling, the environmental protection level of rare earth enterprises needs to be improved. It is the future development trend of hydrometallurgy to vigorously develop rare earth efficient green metallurgy technology, reduce material consumption from the source, improve the comprehensive utilization rate of resources, realize clean production in the whole ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F1/26C02F101/20
CPCB01J20/262C02F1/26C02F1/285C02F2101/20
Inventor 林学全萧伯卓许军
Owner ETERNAL CHEM (CHINA) CO LTD
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