RECOVERY METHOD OF IODINE FROM AROMATIC IODINE COMPOUND

• Main Authors: ASAKURA SATOSHI, SAITO KYOICHI, SATO TAKAHIRO, SUGO TAKANOBU, SUZUKI KOICHI, FUJIWARA KUNIO
• Format: Patent
• Language: English; Japanese
• Published: 31.01.2023
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; COMPOUNDS THEREOF; INORGANIC CHEMISTRY; METALLURGY; NON-METALLIC ELEMENTS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR RELEVANT APPARATUS; TRANSPORTING

To provide a technique capable of recovering iodine at a higher recovery rate from aromatic iodine compounds having an iodine group by a desorption and purification method.SOLUTION: An aromatic iodine compound is deiodinated in the presence of a platinum group element-supported fiber catalyst, an alkali and a reducing agent under mild conditions at ambient temperature and pressure, and then the fibrous catalyst is rapidly removed to separate and recover iodine from the deiodinated liquid. The catalyst support is an anion-exchange fiber that can be quickly taken out of a reaction system. In the separation and recovery of iodine from the deiodinated liquid, high purity iodine can be recovered at a higher recovery rate by using a technique such as an iodine vaporization and absorption method.SELECTED DRAWING: Figure 2 【課題】 ヨード基を有する芳香族ヨウ素化合物から脱離・精製法により、より高ヨウ素回収率で回収できる技術を提供すること。【解決手段】 芳香族ヨウ素化合物を白金族元素担持繊維触媒、アルカリ及び還元剤の存在下に常温常圧の穏和な条件で脱ヨウ素化した後、繊維状触媒を速やかに取出し、脱ヨウ素化済み液からヨウ素を分離回収する。触媒担体はアニオン交換繊維であり、反応系外に速やかに取出しが可能である。また、脱ヨウ素化済み液からのヨウ素の分離回収には、ヨウ素気化吸収法などの技術を利用することによって純度の高いヨウ素を高い回収率で回収できる。【選択図】図２