CN111631228A - Novel broad-spectrum efficient biocidal stripping agent and preparation method thereof - Google Patents

Abstract

The invention relates to a novel broad-spectrum efficient biocidal stripping agent and a preparation method thereof, wherein the novel broad-spectrum efficient biocidal stripping agent is prepared from the following raw materials in parts by weight: 10-20 parts of dodecyl benzene sulfonic acid; 15-25 parts of sodium bromate; 5-15 parts of sodium hypochlorite; 5-10 parts of potassium hydroxide; 5-10 parts of diethylenetriamine; 0.2-1 part of catalyst; the balance being deionized water. The novel broad-spectrum efficient biocidal stripping agent and the preparation method thereof have the rapidity of the traditional chlorine-based bactericide, and have the long-acting property of the non-oxidizing biocide, so that the novel broad-spectrum efficient biocidal stripping agent is safer than the chlorine-based biocide in use, does not produce secondary pollution, and particularly does not produce negative effects on sewage recycling treatment.

Description

Novel broad-spectrum efficient biocidal stripping agent and preparation method thereof

The technical field is as follows:

the invention relates to the technical field of stripping agents, in particular to a novel broad-spectrum efficient biocidal stripping agent.

Background art:

in order to solve the problem of microorganism breeding of the system, the circulating water system needs to be impacted and added with non-oxidizing bactericide and slime remover besides daily oxidizing bactericide.

The selection of the bactericide and the stripping agent is important for the water treatment effect. However, the existing biocidal stripping agent has slow sterilization speed, the sterilization rate can only reach about 95-98%, the effective sterilization duration is short, and the sterilization effect is obviously reduced especially for a high-pH polluted water system.

The invention content is as follows:

the invention aims to provide a novel broad-spectrum efficient biocidal stripping agent which is high in sterilization speed, good in sterilization effect, long in effective sterilization time and easy to degrade, aiming at the defects in the prior art.

The invention provides a novel broad-spectrum efficient biocidal stripping agent which is prepared from the following raw materials in parts by weight:

10-20 parts of dodecyl benzene sulfonic acid;

15-25 parts of sodium bromate;

5-15 parts of sodium hypochlorite;

5-10 parts of potassium hydroxide;

5-10 parts of diethylenetriamine;

0.2-1 part of catalyst;

the balance being deionized water.

Preferably, the catalyst is a magnesium nitrate catalyst.

Preferably, the activity content of the novel broad-spectrum efficient biocidal stripping agent is more than or equal to 14.0%, the density is more than or equal to 1.20, and the pH value is more than or equal to 11.0.

The invention also provides a preparation method of the novel broad-spectrum efficient biocidal stripping agent, which comprises the following steps:

(1) adding quantitative diethylenetriamine into a sodium bromate aqueous solution, adding a quantitative catalyst, uniformly stirring and reacting for 3-5 hours at the temperature of 60-70 ℃;

(2) after the reaction is finished, adding quantitative dodecylbenzene sulfonic acid, cooling to 30-40 ℃, and uniformly stirring for 3-5 hours;

(3) then adding a certain amount of sodium hypochlorite and potassium hydroxide, and uniformly stirring for 3-5 hours under a negative pressure state to obtain a finished product.

The application method of the novel broad-spectrum efficient biocidal stripping agent comprises the following steps: the dosage is added for 3-4 times per month in a high-temperature season and 2-3 times per month in a normal-temperature season, the dosage is generally 50-100ppm, and the dosage can be added to be within 200ppm under special conditions.

The invention has the beneficial effects that:

(1) the product has the rapidity of the traditional chlorine-based bactericide, has the long-acting property of the non-oxidizing biocide, is safer than the chlorine-based biocide in use, does not produce secondary pollution, and particularly does not produce negative effects on the recycling treatment of sewage;

(2) when the additive is added for use, volatile gas is not generated, and the pollution to the surrounding air is hardly generated;

(3) the product does not belong to dangerous chemicals, and greatly reduces the pressure on transportation, storage, packaging and recovery;

(4) the product is suitable for running in a polluted water system with high concentration multiple, high PH and containing media such as ammonia nitrogen, and can play an obvious corrosion inhibition role under the action of a certain dosage of water quality under an acidic condition;

(5) the product not only has compatibility with the full organic phosphorus scale and corrosion inhibitor, but also has a certain synergistic effect with the low-phosphorus or phosphorus-free scale and corrosion inhibitor;

(6) the product has low toxicity, no accumulated toxicity, slight degreasing property to skin and basically no harm to human body in the concentration range of water treatment.

The specific implementation mode is as follows:

the following detailed description of the preferred embodiments of the present invention is provided to enable those skilled in the art to more readily understand the advantages and features of the present invention and to clearly define the scope of the invention.

Example one

Adding 6 parts of diethylenetriamine into 20 parts of sodium bromate aqueous solution, adding 0.6 part of magnesium nitrate catalyst, uniformly stirring and reacting for 4 hours at the temperature of 65 ℃; after the reaction is finished, adding 15 parts of dodecylbenzene sulfonic acid, cooling to 35 ℃, and uniformly stirring for 4 hours; then adding 10 parts of sodium hypochlorite and 6 parts of potassium hydroxide, and uniformly stirring for 4 hours under the condition of negative pressure of 2kPa to obtain a finished medicament; the preparation is prepared to the concentration of 25mg/L and is added into a sample, the adding dose is 60ppm, and the sterilization effect is as follows:

time of day

Initiation of

4h

12h

24h

48h

72h

96h

Number of heterotrophic bacteria

5.2×105

2.8×102

2.2×102

3.7×102

2.5×103

5.6×103

4.8×104

Rate of sterilization

99.9％

99.9％

99.9％

99.5％

98.9％

90.7％

Example two

Adding 10 parts of diethylenetriamine into 15 parts of sodium bromate aqueous solution, adding 1 part of magnesium nitrate catalyst, uniformly stirring and reacting for 5 hours at the temperature of 70 ℃; after the reaction is finished, 20 parts of dodecylbenzene sulfonic acid is added, the temperature is reduced to 30 ℃, and the mixture is uniformly stirred for 3 hours; then adding 5 parts of sodium hypochlorite and 5 parts of potassium hydroxide, and uniformly stirring for 5 hours under the condition of negative pressure of 2kPa to obtain a finished medicament; the preparation is prepared to the concentration of 100mg/L and is added into a sample, the adding dose is 80ppm, and the sterilization effect is as follows:

time of day

Initiation of

4h

12h

24h

48h

72h

96h

Number of heterotrophic bacteria

5.2×105

3.6×102

1.8×102

2.2×102

2.5×103

3.5×103

8.6×104

Rate of sterilization

93％

99.6％

99.5％

99.5％

99.3％

98.3％

EXAMPLE III

Adding 8 parts of diethylenetriamine into 22 parts of sodium bromate aqueous solution, adding 0.3 part of magnesium nitrate catalyst, uniformly stirring and reacting for 5 hours at the temperature of 65 ℃; after the reaction is finished, adding 13 parts of dodecylbenzene sulfonic acid, cooling to 35 ℃, and uniformly stirring for 4 hours; then adding 11 parts of sodium hypochlorite and 8 parts of potassium hydroxide, and uniformly stirring for 3 hours under the condition of negative pressure of 2kPa to obtain a finished medicament; the preparation is prepared to the concentration of 25mg/L and is added into a sample, the adding dose is 100ppm, and the sterilization effect is as follows:

time of day

Initiation of

4h

12h

24h

48h

72h

96h

Number of heterotrophic bacteria

5.2×105

3.3×102

2.4×102

2.1×102

3.6×103

5.0×103

9.1×104

Rate of sterilization

94.2％

99.4％

99.3％

99.3％

98.7％

97.1％

Tests show that the novel broad-spectrum efficient biocidal stripping agent has the advantages of rapid sterilization, high heterotrophic bacteria killing rate, capability of maintaining efficient sterilization time for 72 hours, excellent killing effect on various bacteria and algae, capability of controlling biological slime at high dosage and capability of keeping a system clean.

Finally, it should be noted that: the above embodiments are only used to illustrate the present invention and do not limit the technical solutions described in the present invention; thus, while the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted; all such modifications and variations are intended to be included herein within the scope of this disclosure and the present invention and protected by the following claims.

Claims (4)

1. A novel broad-spectrum efficient biocidal stripping agent is characterized by being prepared from the following raw materials in parts by weight:

10-20 parts of dodecyl benzene sulfonic acid;

15-25 parts of sodium bromate;

5-15 parts of sodium hypochlorite;

5-10 parts of potassium hydroxide;

5-10 parts of diethylenetriamine;

0.2-1 part of catalyst;

the balance being deionized water.

2. The novel broad spectrum highly effective biocidal stripping agent according to claim 1 wherein said catalyst is a magnesium nitrate catalyst.

3. The novel broad-spectrum efficient biocidal stripping agent according to claim 1, wherein said novel broad-spectrum efficient biocidal stripping agent has a pH of 11-12 in the environment of use.

4. A method for preparing a novel broad-spectrum efficient biocidal stripping agent according to any one of claims 1 to 3, comprising the steps of:

(1) adding quantitative diethylenetriamine into a sodium bromate aqueous solution, adding a quantitative catalyst, uniformly stirring and reacting for 3-5 hours at the temperature of 60-70 ℃;

(2) after the reaction is finished, adding quantitative dodecylbenzene sulfonic acid, cooling to 30-40 ℃, and uniformly stirring for 3-5 hours;

(3) then adding a certain amount of sodium hypochlorite and potassium hydroxide, and uniformly stirring for 3-5 hours under a negative pressure state to obtain a finished product.