Cationic dye flocculant and its application

Abstract

The invention relates to a novel cationic dye flocculant as well as a preparation method and application thereof. The novel cationic dye flocculant is characterized by being prepared from polymer mainchain polyhydroxymethyl acrylamide, anionic polymer side chain precursor polymer terminated carboxyl-containing poly(tert-butyl methacrylate), functional polymer side chain precursor polymer terminated carboxyl-containing poly-N-vinyl amino formamide, dimethyl formamide, a catalyst, i.e., N-hydroxysuccinimide, [3-[(ethylimidocarbonyl)amino]propyl] trimethylammonium iodide, cyclohexanediamine tetraacetic acid dianhydride and potassium hydroxide; the novel cationic dye flocculant is used for treating dye waste water and artistic coating waste water which are discharged in a synthesis process ora dyeing and finishing process of dyes. The novel cationic dye flocculant is high in trapping capability and rapid in settling velocity, is capable of trapping cationic dye molecules and complex heavy metal ions within a few seconds, and can rapidly grow into large sedimentation particles, thus achieving the aim of separating the dyes; effluent is basically colorless; simple and convenient operation, low treatment cost and high adaptability are achieved.

Description

technical field [0001] The invention belongs to the field of water treatment technology and polymer functional materials, and specifically relates to a cationic dye flocculant and its preparation method and application, which is mainly used in dye wastewater and art paint wastewater discharged from dye synthesis or dyeing and finishing processes , Realize simultaneous removal of cationic dye molecules and complexed heavy metal ions in dye wastewater. Background technique [0002] In recent years, my country's annual sewage discharge has reached more than 39 billion tons, of which industrial sewage accounts for 51%, while dye wastewater accounts for 35% of the total industrial wastewater discharge, and it is increasing at a rate of 1% year by year. Dye wastewater mainly comes from dye synthesis and dye use enterprises, and is composed of dyes and auxiliaries discharged during the synthesis or dyeing and finishing process. With the rapid development of the printing and dyeing...

AI Technical Summary

Problems solved by technology

However, the chemical structure of polyacrylamide is relatively simple, and there are problems such as poor ability to capture dye molecules, slow sedimentation speed, and inability to deal with complexed heavy metal ions.