Preparation method of long-acting bactericide for composite reverse osmosis membrane

By using composite bactericides prepared by isothiazolinone derivatives and natural bactericidal components in the reverse osmosis membrane water treatment system, the problem of microbial contamination in the reverse osmosis membrane is solved, achieving efficient and long-term bactericidal effect and extending the membrane shelf life.

CN120113677AInactive Publication Date: 2025-06-10ZHEJIANG JINMO ENVIRONMENT TECH CO LTD
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Patent Information

Application Number
CN202510267129.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-03-07
Publication Date
2025-06-10
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

Reverse osmosis membranes are easily contaminated by microorganisms during water treatment. The existing fungicides are not effective and some microorganisms exist in the form of spores, which affects the water quality of water production.

Method used

A long-acting bactericide for composite reverse osmosis membranes is prepared by combining isothiazolinone derivatives and natural bactericidal components. The bactericide does not contain formaldehyde or heavy metals and is suitable for online addition and storage of reverse osmosis membranes.

Benefits of technology

It significantly improves the bactericidal effect and has excellent antibacterial properties. It can effectively kill bacteria, fungi and yeast, extend the shelf life of the reverse osmosis membrane, reduce the frequency of chemical cleaning, and reduce economic losses.

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Abstract

The invention discloses a preparation method of a long-acting bactericide for a composite reverse osmosis membrane, and belongs to the technical field of bactericides. The preparation method of the bactericide comprises the following steps: S1, preparing the components; s2, adding 2-n-octyl-4-isothiazolin-3-one, 1, 2-benzisothiazolin-3-one and a natural bactericidal component into a part of the organic solvent or a mixed solution of a part of the organic solvent and a part of the deionized water, adding a part of the organic acid, and uniformly mixing; and S3, at room temperature, adding the dispersing agent, the polymerization inhibitor, the surfactant, the auxiliary agent, the residual organic solvent and the residual deionized water, and uniformly mixing to obtain the bactericide. The bactericide obtained by the invention is a broad-spectrum bactericide capable of protecting reverse osmosis membrane products from corruption of bacteria, yeasts and fungi, and is not only suitable for on-line addition sterilization of reverse osmosis membranes, but also suitable for membrane preservation.
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Citation Information

Patent Citations

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