Micro-nano fiber ion exchange resin deiodinating agent and preparation method thereof

A technology of ion exchange resin and micro-nano fiber, which is applied in the field of chemical industry, can solve the problems of poor selectivity and small adsorption capacity, and achieve the effects of many adsorption sites, short mass transfer distance, and increased specific surface area and pore size.

Inactive Publication Date: 2020-12-11
陈兵
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the technical defects of small adsorption amount and poor selectivity of the adsorbent when adsorbing iodine

Method used

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  • Micro-nano fiber ion exchange resin deiodinating agent and preparation method thereof
  • Micro-nano fiber ion exchange resin deiodinating agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Step 1: Take 2.5g of polylactic acid and 0.5g of polyvinyl alcohol and mix them evenly, dissolve them in a mixture of 16.7ml of chloroform and 8.3ml of dimethyl sulfoxide, ultrasonicate for 40min, then transfer the solution to a syringe, and spin The fiber is spun horizontally under certain conditions on the device; after spinning, the sample is dried in an oven at 60°C for 6 hours.

[0022] Step 2: Soak 2.4g of the fiber prepared in Step 1 in nitric acid solution for 3 hours, then wash it with deionized water until the washing solution is neutral, then put the washed fiber into a polyethylene sealed bag and discharge the air Infuse nitrogen gas, cool and irradiate with electron beams. After irradiation, place the sample in a mixed solution of 36ml trioctyl / decyl tertiary amine and 36ml silane coupling agent KH-560, and place it in a water bath at 50°C after vacuuming After standing for 3 hours, the samples were alternately washed with methanol and deionized water for 3...

Embodiment 2

[0026] Step 1: Mix 2.7g of polylactic acid and 0.38g of polyvinyl alcohol and dissolve in a mixture of 16.8ml of chloroform and 5.6ml of dimethyl sulfoxide, sonicate for 46min, then transfer the solution to a syringe, and spin The fiber is spun horizontally under certain conditions on the device; after spinning, the sample is dried in an oven at 70°C for 8 hours.

[0027] Step 2: Soak 2.46g of the fiber prepared in Step 1 in nitric acid solution for 2 hours, then wash it with deionized water until the washing solution is neutral, then put the washed fiber into a polyethylene sealed bag and discharge the air Infuse nitrogen gas, cool and irradiate with electron beam. After irradiation, place the sample in a mixed solution of 24.6ml trioctyl / decyl tertiary amine and 36.9ml silane coupling agent KH-560. After standing in the pot for 2 hours, the sample was alternately washed with methanol and deionized water for 3 times, and then dried in a vacuum oven at 70°C for 10 hours to obt...

Embodiment 3

[0031] Step 1: Take 2.6g of polylactic acid and 0.51g of polyvinyl alcohol and mix them evenly, dissolve them in a mixture of 15.5ml of chloroform and 6.2ml of dimethyl sulfoxide, ultrasonicate for 42min, then transfer the solution to a syringe, and spin The fiber is spun horizontally under certain conditions on the device; after spinning, the sample is dried in an oven at 65°C for 7 hours.

[0032] Step 2: Soak 2.49g of the fiber prepared in Step 1 in nitric acid solution for 2 hours, then wash it with deionized water until the washing solution is neutral, then put the washed fiber into a polyethylene sealed bag and discharge the air Infuse nitrogen gas, cool and irradiate with electron beam. After irradiation, place the sample in a mixed solution of 30.1ml trioctyl / decyl tertiary amine and 42.1ml silane coupling agent KH-560, vacuumize and place in a water bath at 48°C Stand in the pot for 2 hours; then wash the sample with methanol and deionized water alternately for 3 time...

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PUM

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Abstract

The invention belongs to the technical field of chemical engineering, and particularly relates to a micro-nano fiber ion exchange resin deiodinating agent and a preparation method thereof. The preparation method comprises the following steps: carrying out electrostatic spinning on polylactic acid and polyvinyl alcohol to obtain micro-nano fibers, and carrying out graft modification on the micro-nano fibers by using a pre-radiation method; then mixing the modified micro-nano fibers with vinylbenzyl chloride and divinyl benzene to prepare resin, and then putting the resin into an ethanol solution of zirconium acetate and manganous nitrate tetrahydrate for standing to obtain the deiodinating agent. The micro-nano fiber ion exchange resin deiodinating agent provided by the invention has largeadsorption capacity and excellent selectivity.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a micronano fiber ion exchange resin deiodination agent and a preparation method thereof. Background technique [0002] Iodine has a great effect. It is not only an essential trace element for the human body to maintain the nervous system, ensure normal metabolism and intellectual development; it is also a basic industrial raw material and an important strategic material, widely used in food, medicine, chemical industry, agriculture, national defense and military fields, etc. . With the rapid development of my country's industry, the annual demand for iodine resources has grown very rapidly, but it is facing the situation of lack of iodine resources. [0003] Iodine is industrially extracted from raw materials such as seaweed, Chilean saltpeter, underground brine and phosphate rock; there are many kinds of specific extraction methods, but the principle is t...

Claims

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Application Information

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IPC IPC(8): B01J39/04
CPCB01J39/04
Inventor 陈兵
Owner 陈兵
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