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Iodine adsorbent, water treatment tank and iodine adsorbing system

An iodine adsorption and functional group technology, which is applied in the fields of adsorption water/sewage treatment, water/sewage treatment, water treatment parameter control, etc. It can solve problems such as dissolving into rainwater or river water, increasing silver loading, and silver dissolution.

Inactive Publication Date: 2016-02-03
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, there is a problem that it will be released into the atmosphere in the event of a nuclear disaster, and will be dissolved in rainwater or river water in the environment.
However, although the silver-supported material has iodide ion selectivity, its adsorption capacity is not high.
Furthermore, silver-added activated carbon is produced by immersing activated carbon in a solution containing silver ions, but since silver ions are easily eluted in water, it is not possible to increase the loading amount of silver
In addition, since silver-supported zeolite is produced by cation exchange, ion exchange may occur again in the presence of other cations, and silver may be eluted

Method used

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  • Iodine adsorbent, water treatment tank and iodine adsorbing system
  • Iodine adsorbent, water treatment tank and iodine adsorbing system
  • Iodine adsorbent, water treatment tank and iodine adsorbing system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0083]

[0084] Put 3-(2-aminoethyl)aminopropyltrimethoxysilane (9.4mL, 44mmol), toluene ( 10 mL) was stirred to obtain a homogeneous solution. Silica gel (particle diameter: 300 μm-500 μm, 6.7 g) containing 30% water was put in, and heated and stirred under reflux (oil bath: temperature: 110° C.) for 5 hours. Next, after cooling to room temperature, the supernatant was removed by decantation, and methanol was added thereto for washing, and then the supernatant was decanted (methanol washing and decantation were repeated twice). Next, the silica gel was transferred to a Kiriyama funnel, and washed with methanol. In this state, continue to attract and dry it. Thereafter, it was further dried under reduced pressure to obtain amine-modified silica gel as white particles (yield: 6.42 g).

[0085]Amine-modified silica gel (0.93 g) was placed in a vial (30 mL), and a 3 wt % silver nitrate aqueous solution (18.6 mL) was added thereto. After closing the lid, it covered with alum...

Embodiment 2

[0087] Put 3-mercaptopropyltrimethoxysilane (1.6mL, 10mmol), 3-(2-aminoethyl)aminopropyl Trimethoxysilane (2.3 mL, 11 mmol) and toluene (5 mL) were stirred to obtain a homogeneous solution. Silica gel (particle diameter: 300 μm-500 μm, 3.3 g) containing 30% water was put in, and heated and stirred under reflux (oil bath: temperature: 110° C.) for 5 hours. Next, after cooling to room temperature, the liquid phase was removed by decantation. Next, methanol (5 mL) was added to the flask, stirred, and the liquid phase was removed by decantation for washing (methanol washing and decantation were repeated five times). The remaining silica gel was transferred to a Kiriyama funnel, and washed with methanol. Suction was continued in this state, it was made to dry, and it dried under reduced pressure after that, and obtained the amine-mercapto modified silica gel as white particle (yield: 3.2 g).

[0088] Amine-mercapto-modified silica gel (0.50 g) was placed in a vial (20 mL), and a...

Embodiment 3

[0090] Change the amount of reagent used in Example 2 to 3-mercaptopropyltrimethoxysilane (2.5mL, 16mmol), 3-(2-aminoethyl)aminopropyltrimethoxysilane (2.0mL, 9.1mmol) , others were carried out as in Example 2, thereby obtaining the iodine adsorbent of Example 3.

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Abstract

An embodiment provides an iodine adsorbent with large adsorption amount. An iodine adsorbent of an embodiment has a support, a first organic group bonded to the support and has a functional group containing nitrogen at least at a terminal, and silver bonded to the nitrogen-containing functional group.

Description

[0001] References to related applications [0002] This application is based on Japanese patent application 2014-151074 (filing date: July 24, 2014), and enjoys priority benefits from this application. This application incorporates the entire contents of this application by referring to this application. technical field [0003] Embodiments relate to an iodine adsorbent, a tank for water treatment, and an iodine adsorption system. Background technique [0004] Iodine is used as pharmaceuticals such as X-ray contrast agents and bactericides, intermediate raw materials or catalysts for chemical synthesis, herbicides, and feed additives. In recent years, iodine is also used in polarizers for LCDs, and its demand has increased. On the other hand, since there are few naturally concentrated resources and environmental regulations have been strengthened in recent years, it is necessary to collect and recycle waste water. In addition, there is a problem that it is also released in...

Claims

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Application Information

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IPC IPC(8): B01J20/22C02F1/28C02F1/58
CPCC02F1/281C02F1/288C02F2209/001C02F2209/003C02F2209/40B01J20/3204B01J20/321B01J20/3248B01J20/3257B01J20/3265B01J20/3285C02F1/285C02F2101/12C07F7/1804B01J20/223B01J20/289
Inventor 井手智仁关口裕实子今田敏弘
Owner KK TOSHIBA
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