Composite biocide

Abstract

The invention relates to a compound biocide suitable for industrial circulation water. Counted by the 100 percent of the total weight of the components, the components comprise 50 to 80 percent of a main agent of glutaric dialdehyde, 10 to 30 percent of a secondary agent of a dication biocide as well as 5 to 30 percent of a secondary agent of a C8 to C18 alkyl (or double dodecyl) quaternary ammonium salt. The compound biocide has the characteristics of broad spectrum, high effect, speediness, long continuous drug effect, less dosage and broad application range and the like and excellent sterilizing performance when the pH value ranges from 7.0 to 9.5; the compound biocide also has excellent penetrability, and can effectively peel off the slimebiological fouling in a system and effectively prevents under-deposit corrosion and simultaneously the compound biocide suitable for industrial circulation water can effectively ease the problems of eutrophy, fast bacteria and algae propagation and device corrosion in the water quality caused by the leakage oil products in the system, thus being particularly suitable for the industrial circulation water with higher oil stain content.

Description

technical field [0001] The invention relates to a composite biocide, in particular to a biocide mainly used in the sterilization treatment of circulating water with relatively high suspended solids and oil pollution content in oil refineries. Background technique [0002] There are often oil leaks in the industrial circulating water of refineries. After the oil leaks into the water system, the bactericide and algicide commonly used in the circulating water system can easily react with the oil and reduce the bactericidal ability of the biocide. At the same time, when the circulating water is suspended When the content of organic matter is high, it is difficult for the bactericidal ability of some biocides to penetrate into the lower layer of slime, thus affecting the bactericidal and algae killing effect of the agent. When the oil pollution content in the circulating water system is high, the bactericidal ability of the agent is often reduced, the bacteria and algae in the wa...

AI Technical Summary

Problems solved by technology

They have played a certain role in controlling the bacteria and algae in circulating water. However, when glutaraldehyde single agent is used as a biocide, due to its poor penetration ability, the dosage of the agent is relatively large; common quaternary ammonium salts (including After the combination of dialkyl quaternary ammonium salt) and glutaraldehyde, the penetration ability of the agent is strengthened, but to achieve the same bactericidal effect, the dosage of the agent is still relatively large

Other patents related to glutaraldehyde such as CN03139646.1, CN98112806.8, CN97107140.3, CN98113676.1, CN98114208.7, CN97191642.X, CN97191671.3, CN98106772.7, CN01145564.0, CN00144203 .7, CN97111762.4, CN97122763.2, CN96122359.6, CN96100827.X, etc. aim to provide a liquid disinfectant with low irritating odor, low toxicity, weak irritation to skin and eyes, and good stability, The medicine should not be used in industrial circulating water systems. Among them, CN03139646.1 introduces a high-efficiency liquid disinfectant. Although there are glutaraldehyde and quaternary ammonium salts in its components, the quaternary ammonium salts it refers to are alkyl dichlorides A mixture of methyl benzyl ammonium and alkyl dimethyl ammonium chloride; a large number of patents on glutaraldehyde introduce the application of glutaraldehyde in human and animal disinfection. After they are applied to the field of industrial circulating water, the bactericidal effect is uniform. Not significant, and the price is high, so it is naturally impossible to realize the effective application of industrial circulating cooling water with high suspended solids and oil content, and a large number of experiments have also proved this

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