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Iodine adsorbent, tank for water treatment, iodine adsorption system, and method for producing iodine adsorbent

A technology of iodine adsorption and adsorbent, applied in the field of iodine adsorbent, which can solve the problems of less silver loading, lower system performance, and smaller volume

Active Publication Date: 2017-09-05
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for these materials, silver is only precipitated as a salt on activated carbon or silica gel in terms of their production methods, so the amount of silver supported is small, and when used in water, there is a concern about performance degradation due to silver elution.
[0005] In addition, when using silica gel as the substrate, the silica gel will dissolve in water or water-soluble organic solvents, so when it is used in an aqueous medium for a long time, the volume of the adsorbent will decrease, and the shrinking adsorbent will pass through the filter to the use environment. Concerns about system performance degradation caused by changes in space velocity due to outflow

Method used

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  • Iodine adsorbent, tank for water treatment, iodine adsorption system, and method for producing iodine adsorbent
  • Iodine adsorbent, tank for water treatment, iodine adsorption system, and method for producing iodine adsorbent
  • Iodine adsorbent, tank for water treatment, iodine adsorption system, and method for producing iodine adsorbent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] Silica gel (QRiACT-Q6 manufactured by FUJI SILYSIA) was classified into a particle size of 300-500 μm by a sieving method, and the water content was adjusted to 30% by mass. 3-Mercaptopropyltrimethoxysilane (833.34 g) and toluene (1680.05 g) were charged into a separable flask (5 L) and stirred well. The silica gel (500g) prepared by the method mentioned above was injected|thrown-in there, and the stirring blade was installed. Set the flask in a mantle heater and begin heating with stirring. While maintaining the reflux state of the solvent, it was heated and stirred from reflux for 9 hours. The flask was cooled to room temperature, and the silica gel and solution were separated by suction filtration. The obtained silica gel was washed with the same amount of toluene as the solvent, and air-dried until the solid content reached 90 wt % or more, thereby obtaining silica gel particles having organic groups.

[0068] Silica gel particles (580.00 g) having an organic gro...

Embodiment 2

[0071] The adsorbent of Example 2 was obtained in the same manner except that the drying conditions after the silane coupling reaction were not air drying but 130° C. heat drying in the above-mentioned Example 1.

Embodiment 3

[0073] The adsorbent of Example 3 was obtained in the same manner as in Example 1 above except that the moisture content of the silica gel was 20% by mass.

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Abstract

Embodiments relate to an iodine adsorbent, a water treatment tank, an iodine adsorption system, and a method for manufacturing the iodine adsorbent. The embodiment provides an iodine adsorbent with little silver elution. The iodine adsorbent of the embodiment is an adsorbent having a carrier as a silicon-containing compound, an organic group bonded to the carrier, and silver. The organic group has a functional group represented by S- or SR at the end, and the silver and S- or SR Sulfur bonding, R is a hydrogen atom or a substituent containing hydrocarbon, so that the element ratio of sulfur in the adsorbent relative to silicon in the adsorbent is MS / MSi, divided by the specific surface area A (m2 / g) of the carrier, we get The value MS / (MSi·A) is 2.4×10-4g / m2≤MS / (MSi·A)≤2.7×10-4g / m2.

Description

technical field [0001] Embodiments relate to an iodine adsorbent, a tank for water treatment, an iodine adsorption system, and a method for producing the iodine adsorbent. Background technique [0002] With the development of industry and the increase of population, efficient use of water resources is required. Therefore, the reuse of wastewater is very important. To achieve these goals, water purification, ie separation of other substances from water, is required. Various methods are known as a method for separating other substances from a liquid, and examples thereof include membrane separation, centrifugation, activated carbon adsorption, ozone treatment, and removal of floating substances by coagulation. By this method, chemical substances such as iodine and nitrogen contained in water that have a large impact on the environment can be removed, and oils and clays dispersed in water can be removed. [0003] Iodine plays an important role in various fields such as pharm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/22B01J20/30C02F1/28
CPCY02W10/37B01J20/3204B01J20/3219B01J20/3236B01J20/3251C02F1/288C02F1/281C02F1/285C02F2101/12C02F2103/343C02F2103/003
Inventor 关口裕实子井手智仁山田有纱今田敏弘
Owner KK TOSHIBA