ISO 4907-1:2023 プラスチック — イオン交換樹脂 — Part 1: アクリル系陰イオン交換樹脂の交換容量の決定 | ページ 2

Foreword

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This document was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 5, Physical-chemical properties.

A list of all parts in the ISO 4907 series can be found on the ISO website.

Introduction

Following the traditional chemical processes such as distillation and extraction, ion exchange and adsorption technology has also become a typical chemical separation technology, which plays an important role in efficient extraction, concentration and refining. Since the realization of organic synthesis, ion exchange resin has become one of the key materials for exchange and adsorption. At present, they have been widely used in water treatment, environmental protection, petrochemical industry, food and medicine, hydrometallurgy and energy industry, almost involving the core content of the United Nations Sustainable Development Goals (SDGs).

Ion exchange resin is a kind of high polymer organic copolymer, which is composed of insoluble three-dimensional space network framework, functional groups connected to the framework and exchangeable ions with opposite charges. The main features determined by the structure are exchangeable, selective, adsorbable and catalytic. However, even the same resin has different properties in different forms, such as exchange capacity and water content, so a unified method is needed to provide basis for manufacturing, quality supervision, technical exchange, factory inspection and arbitration.

Because of the special structure, acrylic anion exchange resins contain not only strong-base and weak-base groups, but also weak-acid groups, and the content of weak-acid groups directly affects the using effect. This document specifies how to determine the exchange capacity of acrylic anion exchange resins.

1 Scope

This document specifies test methods of the strong-base group capacity, the weak-base group capacity and the weak-acid group capacity of acrylic anion exchange resins.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

3 Terms and definitions

For the purposes of this document, the following terms and definitions apply.

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Bibliography