Plant tannin grafting composite magnetic flocculant, and preparation method and application thereof

By preparing a plant tannin-grafted composite magnetic flocculant, a three-dimensional network of organic polymer chains is formed using components such as polymeric aluminum iron silicate and gallnut tannic acid. Combined with magnetic media materials, this solves the problems of complex preparation, low recovery rate, and secondary pollution of existing magnetic flocculants in water treatment, achieving efficient and low-cost wastewater treatment.

CN122254622APending Publication Date: 2026-06-23QINGTIAN FUCHUN ZIGUANG SEWAGE TREATMENT CO LTD
View PDF 1 Cites 0 Cited by

Patent Information

Application Number
CN202511770698.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-11-28
Publication Date
2026-06-23

AI Technical Summary

Technical Problem

Existing magnetic flocculants have problems in water treatment, such as complex preparation processes, low raw material recovery rates, limited flocculation, and potential secondary pollution, making it difficult to meet the demand for efficient and low-cost wastewater treatment.

Method used

Plant tannin grafted composite magnetic flocculant is used, which utilizes components such as polyaluminum iron silicate, gallnut tannic acid, grafting modifier and polyethyleneimine to form a three-dimensional network of organic polymer chains through grafting modification. Combined with magnetic media materials, it forms a highly efficient flocculation and sedimentation, and uses an external magnetic field to accelerate the sedimentation of flocs.

Benefits of technology

It achieves efficient, rapid, and low-cost removal of pollutants such as phosphorus from wastewater, reduces the input of reagents and energy consumption, lowers operating costs, and has significant economic benefits and environmental friendliness.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure FFZSZD4ZTBQNOUR8TVC4AEMIAWZVOKB5NOHEN16Q
    Figure FFZSZD4ZTBQNOUR8TVC4AEMIAWZVOKB5NOHEN16Q
  • Figure ZOTYUTNX7ZECTJ9KOWJOMZEYZPEQFV02W6SDTSQL
    Figure ZOTYUTNX7ZECTJ9KOWJOMZEYZPEQFV02W6SDTSQL
Patent Text Reader

Abstract

The application belongs to the field of water treatment, and discloses a plant tannin grafted composite magnetic flocculant and a preparation method and application thereof. The composite magnetic flocculant comprises polymeric aluminum ferric silicate, Chinese gallnut tannic acid, a grafting modifier, polyethyleneimine and sodium acetate buffer. After the natural green substance Chinese gallnut tannic acid is subjected to Michael addition by the grafting modifier, graft copolymerization is realized, a large number of positive charge points are provided, a stable complex is formed through winding and electrostatic interaction, more flocculation bodies can be bridged, more compact and tough alum flowers are formed, and magnetic medium material is put into the flocculation bodies when the flocculation bodies are formed, so that fine magnetic powder particles are used as precipitation nucleuses, a micro magnetic field is formed to promote the growth of the flocculation bodies, the efficient removal of TP is accelerated, the input of reagents and energy consumption is reduced, low-cost, high-efficiency and green TP removal of a sewage treatment plant is realized, the operation cost is reduced, and remarkable economic benefits are achieved.
Need to check novelty before this filing date? Find Prior Art

Citation Information

Patent Citations

  • A magnetic flocculant, its preparation method and application

    CN107381749B