High-efficiency fungicide for papermaking white water

Abstract

The invention provides papermaking white water high efficiency disinfectant. The disinfectant comprises 5-chlorine2-dihydroisothiazol-3-alkone which occupies 1.6 to 3.2 percent, 2-dihydroisothiazol-3-alkone which occupies 0.4 to 0.8 percent, dodecyl dimethyl benzyl ammonia chloride which occupies 20 to 40 percent, and magnesium nitrate or magnesium chloride which occupies 4.0 to 5.0 percent. The disinfectant has good sterilization function and high chemical stability, the addition of the invention into the papermaking white water can perform the purposes of suppressing the microorganism propagation in the papermaking white water and killing microorganism, and the killing effect of the microorganism in the papermaking white water can reach 95 to 99.9 percent, thereby ensuring that the repeated and circular utilization of the papermaking white water can not cause the generation of various paper defects (broken paper, holes and crafters) due to the microorganism problem.

Description

technical field

[0001] The invention relates to an industrial bactericide, in particular to a non-oxidative bactericide used for killing microorganisms in papermaking white water. Background technique

[0002] As early as 1933, Sanborn proposed the problem of microbial pollution and control measures in the papermaking process. In the papermaking industry, different types of paper products use different raw materials and additives. No matter what kind of product, its basic production The processes are relatively similar, that is, a large number of fibers are suspended in white water, and paper is obtained through processes such as filtration and drying. In order to make the production process go on normally or improve other physical and chemical properties of paper, different additives should be added to the papermaking process, such as sizing agent, flocculant, whitening agent, etc., and the temperature during production is generally maintained at 30°C Left and right, such ...

Examples

Embodiment 1

[0025] Take 4L of the above isothiazolinone derivatives and 12L of 1227 (quaternary ammonium salt cationic surfactant) respectively, mix well, add 672 grams of magnesium chloride, stir evenly, and seal in the container. That is to make a high-efficiency fungicide for papermaking white water. The actual compound content of the fungicide is: 2.8% of 5-chloro-2-methylisothiazolin-3-one, 2-methylisothiazolin-3-one 0.70%, 33.8% of dodecyl dimethyl benzyl ammonium chloride, 4.2% of magnesium chloride, and the balance is water.

[0026] Bactericidal application test on papermaking white water: the papermaking white water circulating water in paper mills has been tested and the total number of microorganisms is 1.0×10 8 cfu / mL. Take 7L of the above-mentioned high-efficiency bactericide for papermaking white water, add it to the above papermaking white water circulating water with a total volume of 20 tons, and take a sample after 4 hours to determine that the total number of microorg...

Embodiment 2

[0029]Take 4 L of the above isothiazolinone derivatives and 16 L of dodecyldimethylbenzyl ammonium chloride respectively, mix well, add 900 g of magnesium chloride, stir evenly, and seal them in a container. That is to make a high-efficiency fungicide for papermaking white water. The actual compound content of this kind of fungicide is: 2.24% of 5-chloro-2-methylisothiazolin-3-one, 2.24% of 2-methylisothiazolin-3-one 0.56%, 36% dodecyl dimethyl benzyl ammonium chloride, 4.5% magnesium chloride, and the balance is water.

[0030] Bactericidal application test on papermaking white water: the papermaking white water circulating water in paper mills has been tested and the total number of microorganisms is 8.9×10 7 cfu / mL. Get 2.5L of this special fungicide for white water, add it to the above papermaking white water circulating water with a total volume of 20 tons, and take a sample after 6 hours to determine that the total number of microorganisms in the papermaking white water...

Embodiment 3

[0033] Separately take 2 L of isothiazolinone derivatives and 10 L of dodecyldimethylbenzyl ammonium chloride, mix thoroughly, add 590 g of magnesium nitrate, stir evenly, and seal them in a container. That is to make a special fungicide for papermaking white water, the actual compound content of this kind of fungicide is: 1.84% of 5-chloro-2-methylisothiazolin-3-one, 1.84% of 2-methylisothiazolin-3-one 0.46%, dodecyl dimethyl benzyl ammonium chloride 37.5%, magnesium nitrate 4.92%.

[0034] Bactericidal application test on papermaking white water: the papermaking white water circulating water in paper mills has been tested and the total number of microorganisms is 9.4×10 7 cfu / mL. Get 4L of this special bactericide for white water, join the above papermaking white water circulating water with a total volume of 20 tons, and take a sample after 4 hours to determine that the total number of microorganisms in papermaking white water is 1.3×10 6 cfu / mL, the bactericidal rate rea...

technical field

[0001] The invention relates to an industrial bactericide, in particular to a non-oxidative bactericide used for killing microorganisms in papermaking white water. Background technique

[0002] As early as 1933, Sanborn proposed the problem of microbial pollution and control measures in the papermaking process. In the papermaking industry, different types of paper products use different raw materials and additives. No matter what kind of product, its basic production The processes are relatively similar, that is, a large number of fibers are suspended in white water, and paper is obtained through processes such as filtration and drying. In order to make the production process go on normally or improve other physical and chemical properties of paper, different additives should be added to the papermaking process, such as sizing agent, flocculant, whitening agent, etc., and the temperature during production is generally maintained at 30°C Left and right, such ...

Examples

Embodiment 1

[0025] Take 4L of the above isothiazolinone derivatives and 12L of 1227 (quaternary ammonium salt cationic surfactant) respectively, mix well, add 672 grams of magnesium chloride, stir evenly, and seal in the container. That is to make a high-efficiency fungicide for papermaking white water. The actual compound content of the fungicide is: 2.8% of 5-chloro-2-methylisothiazolin-3-one, 2-methylisothiazolin-3-one 0.70%, 33.8% of dodecyl dimethyl benzyl ammonium chloride, 4.2% of magnesium chloride, and the balance is water.

[0026] Bactericidal application test on papermaking white water: the papermaking white water circulating water in paper mills has been tested and the total number of microorganisms is 1.0×10 8 cfu / mL. Take 7L of the above-mentioned high-efficiency bactericide for papermaking white water, add it to the above papermaking white water circulating water with a total volume of 20 tons, and take a sample after 4 hours to determine that the total number of microorg...

Embodiment 2

[0029]Take 4 L of the above isothiazolinone derivatives and 16 L of dodecyldimethylbenzyl ammonium chloride respectively, mix well, add 900 g of magnesium chloride, stir evenly, and seal them in a container. That is to make a high-efficiency fungicide for papermaking white water. The actual compound content of this kind of fungicide is: 2.24% of 5-chloro-2-methylisothiazolin-3-one, 2.24% of 2-methylisothiazolin-3-one 0.56%, 36% dodecyl dimethyl benzyl ammonium chloride, 4.5% magnesium chloride, and the balance is water.

[0030] Bactericidal application test on papermaking white water: the papermaking white water circulating water in paper mills has been tested and the total number of microorganisms is 8.9×10 7 cfu / mL. Get 2.5L of this special fungicide for white water, add it to the above papermaking white water circulating water with a total volume of 20 tons, and take a sample after 6 hours to determine that the total number of microorganisms in the papermaking white water...

Embodiment 3

[0033] Separately take 2 L of isothiazolinone derivatives and 10 L of dodecyldimethylbenzyl ammonium chloride, mix thoroughly, add 590 g of magnesium nitrate, stir evenly, and seal them in a container. That is to make a special fungicide for papermaking white water, the actual compound content of this kind of fungicide is: 1.84% of 5-chloro-2-methylisothiazolin-3-one, 1.84% of 2-methylisothiazolin-3-one 0.46%, dodecyl dimethyl benzyl ammonium chloride 37.5%, magnesium nitrate 4.92%.

[0034] Bactericidal application test on papermaking white water: the papermaking white water circulating water in paper mills has been tested and the total number of microorganisms is 9.4×10 7 cfu / mL. Get 4L of this special bactericide for white water, join the above papermaking white water circulating water with a total volume of 20 tons, and take a sample after 4 hours to determine that the total number of microorganisms in papermaking white water is 1.3×10 6 cfu / mL, the bactericidal rate rea...

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