... can be used as drying and strengthening agent, retention agent, filter agent inpaper making industry, for white wastewater treatment, too.3. It ... waste water in mining and coal washing industry.4. It can be used for the treatment of dyeing, leather and ... can be used as oil chemical assistants, such as anti-clay swelling agent, acidicgelatinizer. etc. Acrylamide with high ionization for coal washing