Preparation method for silver extraction material

Abstract

The invention discloses a preparation method for a silver extraction material. The preparation method comprises the following two steps: selecting specific fibers, using an organic alcohol type compound as a solvent, adding a balanced amount of aminopyridine reagent, and generating a reaction at a certain temperature; separating the fibers after reaction, cleaning the fibers by using a balanced amount of distilled water, and drying the fibers in an extraction manner; taking the dried fibers, utilizing a chlorinated alkane type reagent as a solvent, adding a balanced amount of hydroxylamine type reagent, and enabling reaction at a certain temperature; separating the fibers after the reaction, cleaning the fibers by using the distilled water, treating the fibers by using HCl, cleaning the fibers again by using the distilled water, and then drying in the extraction manner. According to the preparation method for the silver extraction material, an acrylonitrile polymer is taken as a framework, and an alcohol type reagent is taken as a solvent, so that amino modification is performed; and then the chlorinated alkane type reagent is utilized as a solvent, thereby hydroxylamine modification is performed; therefore, high-efficiency ion exchange fiber materials are prepared. The preparation method provided by the invention is simple to operate and low in cost, and can effectively solve silver recycle and utilization problems.

Description

technical field

[0001] The invention relates to a preparation method of a silver extraction material, in particular to the preparation of an ion exchange fiber, which is suitable for extracting silver ions in waste water. Background technique

[0002] Because silver-containing wastewater is highly toxic to humans and the environment, it is easy to cause pollution problems, and silver is a precious metal. For many years, people have studied the treatment methods of this kind of wastewater, mainly including chemical precipitation and ion exchange resin.

[0003] Chemical precipitation is a conventional treatment method for most heavy metals. It forms insoluble precipitation reagents under alkaline conditions. The process has high requirements on equipment, temperature and environment, and occupies a large area. The method of using ion exchange resin to treat silver-containing wastewater can facilitate the recovery of silver in subsequent processes, and can be used after regene...