Method for eliminating radioactive iodine and hydrophilic resin for eliminating radioactive iodine

Patent metadata

Field	Value
Publication number	US-10008300-B2
Application number	US-201414205450-A
Country	US
Kind code	B2
Filing date	Mar 12, 2014
Priority date	Oct 26, 2011
Publication date	Jun 26, 2018
Grant date	Jun 26, 2018

Abstract

The present invention is a method for eliminating radioactive iodine using a hydrophilic resin that adsorbs radioactive iodine, wherein the hydrophilic resin is at least one selected from the group consisting of a hydrophilic polyurethane resin, a hydrophilic polyurea resin, and a hydrophilic polyurethane-polyurea resin and has a hydrophilic segment and, in the principal chain and/or a side chain in the structure thereof, has a tertiary amino group or has a tertiary amino group and polysiloxane segment. By means of the present invention, a novel method for eliminating radioactive iodine is provided that is simple and low-cost, furthermore does not require an energy source such as electricity, moreover can take in and stably immobilize the eliminated radioactive iodine within a solid, and is capable of reducing the volume of radioactive waste as necessary.

First claim

The invention claimed is:

1. A method for eliminating radioactive iodine using a hydrophilic resin that adsorbs radioactive iodine in liquid and/or a solid body, comprising the steps of:
providing a hydrophilic resin selected from the group consisting of a hydrophilic polyurethane resin, a hydrophilic polyurea resin, and a hydrophilic polyurethane-polyurea resin, wherein the hydrophilic resin has a hydrophilic segment, wherein a structure of the hydrophilic resin has a principal chain and a side chain, and wherein a tertiary amino group-containing segment is located in said principal chain and/or said side chain; and
contacting the liquid and/or solid body with the hydrophilic resin to adsorb radioactive iodine from the liquid and/or solid body within the hydrophilic resin.

2. The method for eliminating radioactive iodine according to claim 1 , wherein the hydrophilic segment is a polyethylene oxide segment.

3. The method for eliminating radioactive iodine according to claim 2 , wherein the hydrophilic resin is a resin formed from, as a part of a raw material, a polyol having at least one tertiary amino group or a polyamine having at least one tertiary amino group.

4. The method for eliminating radioactive iodine according to claim 1 , wherein the hydrophilic resin is a resin formed from, as a part of a raw material, a polyol having at least one tertiary amino group or a polyamine having at least one tertiary amino group.

5. The method for eliminating radioactive iodine according to claim 1 , wherein a polysiloxane segment is located in said principal chain and/or said side chain.

6. The method for eliminating radioactive iodine according to claim 5 , wherein the hydrophilic segment is a polyethylene oxide segment.

7. The method for eliminating radioactive iodine according to claim 6 , wherein the hydrophilic resin is a resin formed from, as a part of a raw material, a polyol having at least one tertiary amino group or a polyamine having at least one tertiary amino group and a compound having at least one active hydrogen containing-group and a polysiloxane segment in the same molecule.

8. The method for eliminating radioactive iodine according to claim 5 , wherein the hydrophilic resin is a resin formed from, as a part of a raw material, a polyol having at least one tertiary amino group or a polyamine having at least one tertiary amino group and a compound having at least one active hydrogen containing-group and a polysiloxane segment in the same molecule.

9. The method for eliminating radioactive iodine according to claim 5 , wherein the hydrophilic segment, the tertiary amino group-containing segment that contains a component having at least one tertiary amino group as a constituent unit and the polysiloxane segment are randomly connected through a urethane bond, a urea bond or a urethane-urea bond.

10. The method for eliminating radioactive iodine according to claim 1 , wherein the hydrophilic segment and the tertiary amino group-containing segment that contains a component having at least one tertiary amino group as a constituent unit are randomly connected through a urethane bond, a urea bond or a urethane-urea bond.

Assignees

• Dainichiseika Color Chem
• Ukima Colour & Chem Mfg
• Dainichiseika Color Chem

Inventors

• Hanada Kazuyuki
• Uruno Manabu
• Kimura Kazuya
• Takahashi Kenichi

Classifications

• C02F1/285

  using synthetic organic sorbents · CPC title

• C02F2101/006

  Radioactive compounds · CPC title

• C02F2101/12

  Halogens or halogen-containing compounds · CPC title

• G21F9/12 Primary

  by absorption; by adsorption; by ion-exchange · CPC title

• G21F9/307

  in polymeric matrix, e.g. resins, tars · CPC title