Bactericidal scale inhibitor for reverse osmosis membrane and preparation method of bactericidal scale inhibitor

By using a bactericidal and scale inhibitor containing citrate, permeate, chitosan quaternary ammonium salt and other components during seawater desalination, the problem of reverse osmosis membrane being blocked by scale and microbial membrane scale is solved, and the effect of extending the membrane service life and maintaining the filtration effect is achieved.

CN119638089APending Publication Date: 2025-03-18QINGDAO BCTA DESALINATION CO LTD +2
6 Cites 0 Cited by

Patent Information

Application Number
CN202411976456.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-31
Publication Date
2025-03-18

AI Technical Summary

Technical Problem

During seawater desalination, the reverse osmosis membrane is easily deposited by calcium ions, magnesium ions and microorganisms in seawater to form scale and microbial membrane scale, resulting in a reduced filtration effect and shortened service life.

Method used

A bactericidal and scale inhibitor for reverse osmosis membranes is provided, which contains citrate, penetrant, chitosan quaternary ammonium salt, bactericidal liquid, dispersant, chelating agent and water. Through the combination of these components, calcium ions can be prevented from forming scale, inhibit and kill microorganisms, remove the formed membrane scale, and prolong the service life of the reverse osmosis membrane.

Benefits of technology

This bactericidal scale inhibitor can effectively prevent the pores of the reverse osmosis membrane from being blocked, maintain the permeability of the membrane, extend the service life of the membrane, and ensure the filtration effect during seawater desalination.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The invention relates to the field of scale inhibitors, and particularly discloses a bactericidal scale inhibitor for a reverse osmosis membrane and a preparation method of the bactericidal scale inhibitor. The bactericidal scale inhibitor for the reverse osmosis membrane is prepared from the following raw materials in parts by weight: 5 to 10 parts of citrate, 1 to 3 parts of penetrant, 1 to 3 parts of chitosan quaternary ammonium salt, 2 to 8 parts of bactericidal liquid, 1 to 2 parts of dispersing agent, 1 to 2 parts of chelating agent and 80 to 100 parts of water, the preparation method comprises the following steps: mixing citrate and water, stirring and dissolving to obtain a primary mixture; adding a penetrating agent and chitosan quaternary ammonium salt into the primary mixture, mixing and dissolving, then adding a sterilizing solution, a dispersing agent and a chelating agent, and mixing and dissolving to obtain a finished product. And even if pores of the reverse osmosis membrane are blocked, the bactericidal scale inhibitor has the effects of removing water scales and microorganisms, so that the permeability of the reverse osmosis membrane in the seawater desalination process is ensured, and the service life of the reverse osmosis membrane is prolonged.
Need to check novelty before this filing date? Find Prior Art