CN113973819B - High-efficiency bactericide and preparation method thereof - Google Patents
High-efficiency bactericide and preparation method thereof Download PDFInfo
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- A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
- A01N43/48—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with two nitrogen atoms as the only ring hetero atoms
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Abstract
The invention belongs to the technical field of bactericides, and particularly relates to an efficient bactericide and a preparation method thereof. The efficient bactericide consists of the following raw materials: quaternary ammonium salt bactericide, didodecyldimethyldibenzyl tin ammonium chloride, dodecyl triphenyl phosphonium bromide, ditridecyltin oxide, penetrating agent and water; wherein: the quaternary ammonium salt bactericide is a mixture of MHTD and poly (chlorinated) -2-hydroxypropyl-1, 1-N-dimethylamine, and the mass ratio of the MHTD to the poly (chlorinated) -2-hydroxypropyl-1, 1-N-dimethylamine is 1.2-1.3. The high-efficiency bactericide disclosed by the invention has a good bactericidal effect on common sulfate reducing bacteria, saprophytic bacteria and iron bacteria in the reinjection water, is long in timeliness, can achieve a good bactericidal effect by adding a small amount of bactericide, is not corrosive and has a corrosion inhibition effect, cannot generate drug resistance after being used for a long time, and is good in compatibility with other agents in the reinjection water.
Description
Technical Field
The invention belongs to the technical field of bactericides, and particularly relates to an efficient bactericide and a preparation method thereof.
Background
Microbial corrosion is a phenomenon in which the entire process of life activity of microorganisms participates in causing or causing a material corrosion process. The bacteria in the microbial corrosion phenomenon include Sulfate Reducing Bacteria (SRB), saprophytic bacteria (TGB) and iron bacteria (FB). These three types of bacteria are anaerobic bacteria, but the most important anaerobic bacteria causing MIC phenomenon are SRB, which are present throughout the oilfield sewage system.
The sulfate reducing bacteria of the genus of anaerobic bacteria is a ubiquitous bacterium which can survive under high salinity, high pressure and high temperature, preferably at a growth temperature of 20-40 ℃, and reduces sulfate in sewage into sulfide and atomic oxygen during propagation. Sulfate-reducing bacteria are often present in areas of rough water flow and dead water, such as low flow lines, flushing tanks, crude oil storage tanks, and scale deposits in tanks or under organic residues. The sulfate reducing bacteria propagate on the surface of the steel, which accelerates the local corrosion of the steel and causes the perforation of underground and ground production pipelines. Black viscous residues generated by sulfate reducing bacteria can block the pore passages of the stratum, reduce the water injection amount and influence the crude oil production.
The organic matters and the sulfate reducing bacteria reproduction products in the sewage create favorable conditions for the reproduction of aerobic bacteria such as saprophytic bacteria and iron bacteria. Saprophytic bacteria are a non-single colony, and the dense mucus produced by the saprophytic bacteria is often attached to pipelines and equipment, adsorbs suspended matters and precipitates in water, causes filter blockage and equipment corrosion of a water injection system, also reduces the water injection amount, and influences the crude oil production.
At present, most oil fields in China enter a water injection development stage, and produced water is treated and then reinjected. In water flooding systems, a large number of microorganisms, particularly Sulfate Reducing Bacteria (SRB), are present, and black precipitates and hydrogen sulfide are generated in the metabolic process, so that pipeline equipment is corroded. Bactericides are often added into oilfield reinjection sewage for treatment, wherein the most commonly used bactericides are cationic quaternary ammonium salt bactericides. At the present stage, in order to improve the oil recovery rate of part of oil fields, a polymer flooding technology is implemented, and with the continuous popularization of the polymer flooding technology, the mass fraction of the polymer remaining in the produced sewage is higher and higher. The cationic bactericide commonly used in the oil field and the anionic polymer in the polymer flooding produced water form a water-insoluble complex, and simultaneously, the cationic bactericide and the partially hydrolyzed polyacrylamide have precipitation and flocculation reactions, so that the concentration of the polymer is reduced, the effective concentration of the bactericide is reduced, and the use effect of the bactericide is greatly reduced. The sterilization effect is poor, not only bacterial corrosion of pipeline equipment is caused, but also the microorganism can damage polymer molecular chains, and the viscosity of the polymer is reduced.
The method is divided into an oxidation type bactericide and a non-oxidation type bactericide according to the sterilization mechanism. Wherein, the oxidizing bactericide is chlorine, chlorine dioxide and other bactericides, and based on the oxidation, the protoplasm structure of the cell is damaged to achieve the bactericidal effect, and the protoplasm structure oxidizes certain active groups of the cell structure to achieve the bactericidal effect.
The common non-oxidizing bactericides are organic aldehyde, organic tin compounds and the like, and in terms of the action principle, the non-oxidizing bactericides can damage the functions of cell membranes by permeating into the bodies of bacteria to finally kill the bacteria or kill the bacteria through electrostatic action.
The bactericide widely used at present is a quaternary ammonium salt cationic bactericide or a compound bactericide taking quaternary ammonium salt as a main component, and typical bactericides comprise 1227 (dodecyl dimethyl benzyl ammonium chloride), 1231 (dodecyl trimethyl ammonium chloride), benzalkonium bromide (dodecyl dimethyl benzyl ammonium bromide) and the like. In the oil field actual production operation, cationic surfactant class germicide can lose the drug effect with the polymer reaction of reinjection aquatic for bactericidal effect variation, in addition the reinjection aquatic contains common influences such as oil, suspended solid, has reduced its bactericidal effect in gathering the sewage more. Therefore, there is a need to develop a new high-efficiency bactericide for treating oilfield reinjection water.
Disclosure of Invention
The purpose of the invention is: provides a high-efficiency bactericide. The efficient bactericide has good bactericidal effect and long timeliness, and the invention also provides the preparation method of the efficient bactericide.
The efficient bactericide disclosed by the invention comprises the following raw materials in percentage by mass:
10 to 15 percent of quaternary ammonium salt bactericide
8-12% of didodecyldimethyldibenzyltin ammonium chloride
Dodecyl triphenyl phosphonium bromide 2-3.5%
0.5 to 1.0 percent of double tributyl tin oxide
18 to 23 percent of penetrating agent
The balance of water;
wherein: the quaternary ammonium salt bactericide is a mixture of N-metronidazole-N- (dodecyl dimethyl) -2-hydroxy-1, 3-ammonium dichloride (MHTD) and polychloro-2-hydroxypropyl-1, 1-N-dimethylamine, and the mass ratio of the MHTD to the polychloro-2-hydroxypropyl-1, 1-N-dimethylamine is 1.2-1.3.
Wherein:
preferably, the efficient bactericide disclosed by the invention consists of the following raw materials in percentage by mass:
15 percent of quaternary ammonium salt bactericide
10 percent of didodecyldimethyldibenzyltin ammonium chloride
Dodecyl triphenyl phosphonium bromide 2.5%
0.5 percent of dibutyltin oxide
22 percent of penetrating agent
The balance of water.
The N-metronidazole-N- (dodecyl dimethyl) -2-hydroxy-1, 3-ammonium dichloride (MHTD) is prepared by firstly synthesizing N- (3-chloro-2-hydroxypropyl) -N, N-dimethyl dodecyl ammonium chloride by taking dodecyl dimethyl amine, hydrogen chloride and epoxy chloropropane as raw materials; then N- (3-chloro-2-hydroxypropyl) -N, N-dimethyldodecyl ammonium chloride reacts with metronidazole to obtain the compound.
The penetrant is a mixture of trimethylolpropane polyoxypropylene polyoxyethylene ether, polyoxyethylene polyoxypropylene pentaerythritol ether and diethylene glycol mono-n-butyl ether, wherein the mass ratio of the trimethylolpropane polyoxypropylene polyoxyethylene ether to the polyoxyethylene polyoxypropylene pentaerythritol ether to the diethylene glycol mono-n-butyl ether is (1) to (0.2-0.3).
Trimethylolpropane polyoxypropylene polyoxyethylene ether has fine solubilization nature, and can biodegradable, and add a small amount of polyoxyethylene polyoxypropylene pentaerythritol ether, the effect that has the defoaming agent, diethylene glycol mono n-butyl ether adds as polar substance, the mixed solution of three can be fine improves the interfacial tension of germicide solution and reinjection water, and have fine defoaming effect to the germicide main ingredient, the bactericidal effect of germicide is improved to the edgewise, can make the germicide have better permeability, improve the breadth and the degree of depth of action scope, the activity of germicide has been increased, the quantity of germicide has been reduced to a certain extent.
The high-efficiency bactericide takes a double-quaternary-ammonium-salt bactericide-N-metronidazole-N- (dodecyl dimethyl) -2-hydroxy-1, 3-ammonium dichloride (MHTD) and a polyquaternary-ammonium-salt bactericide-polychloro-2-hydroxypropyl-1, 1-N-dimethylamine as main agents, wherein the polychloro-2-hydroxypropyl-1, 1-N-dimethylamine is non-foam type, the two agents are compounded and used to have synergistic effect, the MHTD selects the metronidazole for modification to improve the bactericidal effect, the double-quaternary-ammonium-salt bactericide and the polyquaternary-salt bactericide have good water solubility compared with the common quaternary-salt bactericide, and the molecular structures of the two agents have more positive charge groups, and the positive charge is concentrated and distributed due to the induction effect, so the absorption effect on bacteria such as sulfate reducing bacteria is stronger, and in addition, the double-quaternary-ammonium-salt bactericide and the polyquaternary-salt bactericide have a hydrophobic group and a hydrophilic group at the same time, so that the double-quaternary-ammonium-salt bactericide and the polyquaternary-ammonium-salt bactericide can permeate into the cells of the bacteria such as the sulfate reducing bacteria to cause protein denaturation, thereby killing the bacteria. The polyquaternium bactericide is selected to be compounded with the polyquaternium bactericide for use, the pH value range of the bactericide is further widened due to the polyquaternium bactericide, and the addition of the polyquaternium bactericide can effectively control the growth of slime, promote the peeling of the slime and prevent the growth and propagation of saprophytic bacteria and iron bacteria to a certain extent; meanwhile, due to the molecular structure characteristics of the bactericide, the bactericide has good dispersion, permeation and corrosion inhibition effects, so that the action distance and action range of the bactericide are greatly improved, and the bactericide cannot cause bacteria such as sulfate reducing bacteria to generate drug resistance due to long-term use.
Sn atoms in the didodecyldimethyldimethyl tin ammonium chloride can form complex compounds with amino and carboxyl in bacterial protein, so that the protein is denatured to cause cell death, and the bactericidal effect on saprophytic bacteria and iron bacteria is good; because the molecule contains two nitrogen atoms, the metal surface can be adsorbed to form a protective film, thereby playing a role in corrosion inhibition. The addition of the didodecyldimethyldibenzyl tin ammonium chloride further improves the slow release effect of the prepared bactericide and shortens the action time of the bactericide, and has obvious bactericidal effect on saprophytic bacteria and iron bacteria and improved action effect of the bactericide.
In addition, a small amount of the bis-tributyltin oxide is added, on one hand, the application condition of the bis-tributyltin oxide is not harsh, the method is suitable for the water quality of various reinjection water, and microorganisms can be killed by causing the metabolic disturbance of bacterial cells under both acidic and alkaline conditions; the effect on slime bacteria such as saprophytic bacteria (TGB) and the like is excellent, and the bacteria attached to the pipe wall can be killed; in addition, due to the fact that the added bis-tributyl tin oxide has certain oxidizability, the bactericidal effect of the added bis-dodecyl dimethyl dibenzyl tin ammonium chloride is enhanced.
The dodecyl triphenyl phosphonium bromide is added because of good compatibility with other medicaments added into the reinjection water and low foamability, and in addition, the dodecyl triphenyl phosphonium bromide is mainly added because of good slime stripping effect. The water-soluble anti-scaling agent has good stripping effect on anaerobic bacteria attached to the incrustation sediment of a water flow displeasure and a dead water area and a tank or under organic matter residues, thereby preventing the tank from being further corroded.
The quaternary ammonium salt bactericide, the didodecyldimethyldibenzyl tin ammonium chloride, the dodecyltriphenyl phosphonium bromide and the ditridecyltin oxide are compounded for use, so that the use amount of the bactericide is greatly reduced, the bactericide is suitable for various bacteria, can be used for a long time without generating drug resistance, and the bactericide has good bactericidal effect on common sulfate reducing bacteria, saprophytic bacteria and iron bacteria in reinjection water; and the fourth bactericide is not only a bactericide, but also has a corrosion inhibition effect, and a corrosion inhibitor is not required to be additionally added, and a penetrating agent solvent is compounded, so that the depth and the width of the action of the bactericide are widened.
The preparation method of the high-efficiency bactericide comprises the following steps:
(1) Preparation of penetrant solution: adding trimethylolpropane polyoxypropylene polyoxyethylene ether and polyoxyethylene polyoxypropylene pentaerythritol ether into a mixed solution of diethylene glycol mono-n-butyl ether and water, and uniformly stirring to prepare a penetrant solution;
(2) And respectively adding the quaternary ammonium salt bactericide, didodecyldimethyldibenzyl tin ammonium chloride, dodecyl triphenyl phosphorus bromide and ditridecyltin oxide into the penetrating agent solution for mixing to prepare the high-efficiency bactericide.
Wherein:
the mixing time in the step (2) is 30-45min, and the stirring and mixing speed is 400-500r/min.
The application of the high-efficiency bactericide of the invention is to add the high-efficiency bactericide into the oilfield reinjection water, wherein the adding concentration of the bactericide is 5-8mg/l.
Compared with the prior art, the invention has the following beneficial effects:
(1) The efficient bactericide has good bactericidal action and long timeliness on common sulfate reducing bacteria, saprophytic bacteria and iron bacteria in the reinjection water, can achieve good bactericidal effect by adding a small amount of bactericide, has no corrosivity and a corrosion inhibition effect, cannot generate drug resistance after being used for a long time, and has good compatibility with other medicaments in the reinjection water.
(2) The preparation method of the high-efficiency bactericide has the advantages of easily controlled process parameters, simple preparation method and suitability for industrialized popularization and production, and the high-efficiency bactericide prepared by the method has low toxicity, obvious sterilization and corrosion-inhibition effects on recycled water and long-term use.
Detailed Description
The present invention is further described below with reference to examples.
Example 1
The efficient bactericide described in this embodiment 1 is composed of the following raw materials in mass percent:
15 percent of quaternary ammonium salt bactericide
Didodecyl dimethyl dibenzyl tin ammonium chloride 10%
Dodecyl triphenyl phosphonium bromide 2.5%
0.5 percent of double tributyl tin oxide
22 percent of penetrating agent
The balance of water;
wherein: the quaternary ammonium salt bactericide is a mixture of N-metronidazole-N- (dodecyl dimethyl) -2-hydroxy-1, 3-ammonium dichloride (MHTD) and poly (chlorinated) -2-hydroxypropyl-1, 1-N-dimethylamine, and the mass ratio of the MHTD to the poly (chlorinated) -2-hydroxypropyl-1, 1-N-dimethylamine is 1.3.
The N-metronidazole-N- (dodecyl dimethyl) -2-hydroxy-1, 3-ammonium dichloride (MHTD) is prepared by firstly synthesizing N- (3-chloro-2-hydroxypropyl) -N, N-dimethyl dodecyl ammonium chloride by taking dodecyl dimethyl amine, hydrogen chloride and epoxy chloropropane as raw materials; then N- (3-chloro-2-hydroxypropyl) -N, N-dimethyldodecyl ammonium chloride reacts with metronidazole to obtain the compound.
The penetrant is a mixture of trimethylolpropane polyoxypropylene polyoxyethylene ether, polyoxyethylene polyoxypropylene pentaerythritol ether and diethylene glycol mono-n-butyl ether, wherein the mass ratio of the trimethylolpropane polyoxypropylene polyoxyethylene ether to the polyoxyethylene polyoxypropylene pentaerythritol ether to the diethylene glycol mono-n-butyl ether is 1.2.
The preparation method of the efficient bactericide of embodiment 1 comprises the following steps:
(1) Preparation of penetrant solution: adding trimethylolpropane polyoxypropylene polyoxyethylene ether and polyoxyethylene polyoxypropylene pentaerythritol ether into a mixed solution of diethylene glycol mono-n-butyl ether and water, and uniformly stirring to prepare a penetrant solution;
(2) And respectively adding the quaternary ammonium salt bactericide, didodecyldimethyldibenzyl tin ammonium chloride, dodecyl triphenyl phosphorus bromide and ditridecyltin oxide into the penetrating agent solution for mixing to prepare the high-efficiency bactericide.
Wherein:
the mixing time in the step (2) is 45min, and the stirring and mixing speed is 400r/min.
In the application of the high-efficiency bactericide described in this embodiment 1, the high-efficiency bactericide is added into the oilfield reinjection water, and the addition concentration of the bactericide is 5mg/l.
Example 2
The efficient bactericide described in this embodiment 2 is composed of the following raw materials in mass percent:
10 percent of quaternary ammonium salt bactericide
Didodecyl dimethyl dibenzyl tin ammonium chloride 12%
Dodecyl triphenyl phosphonium bromide 2.0%
1.0 percent of double tributyl tin oxide
18 percent of penetrating agent
The balance of water;
wherein: the quaternary ammonium salt bactericide is a mixture of N-metronidazole-N- (dodecyl dimethyl) -2-hydroxy-1, 3-ammonium dichloride (MHTD) and polychloro-2-hydroxypropyl-1, 1-N-dimethylamine, and the mass ratio of the MHTD to the polychloro-2-hydroxypropyl-1, 1-N-dimethylamine is 1.25.
The N-metronidazole-N- (dodecyl dimethyl) -2-hydroxy-1, 3-ammonium dichloride (MHTD) is prepared by firstly taking dodecyl dimethyl amine, hydrogen chloride and epichlorohydrin as raw materials to synthesize N- (3-chloro-2-hydroxypropyl) -N, N-dimethyldodecyl ammonium chloride; then N- (3-chloro-2-hydroxypropyl) -N, N-dimethyldodecyl ammonium chloride reacts with metronidazole to obtain the compound.
The penetrant is a mixture of trimethylolpropane polyoxypropylene polyoxyethylene ether, polyoxyethylene polyoxypropylene pentaerythritol ether and diethylene glycol mono-n-butyl ether, wherein the mass ratio of the trimethylolpropane polyoxypropylene polyoxyethylene ether to the polyoxyethylene polyoxypropylene pentaerythritol ether to the diethylene glycol mono-n-butyl ether is 1.3: 30.
The preparation method of the high-efficiency bactericide described in embodiment 2 comprises the following steps:
(1) Preparation of penetrant solution: adding trimethylolpropane polyoxypropylene polyoxyethylene ether and polyoxyethylene polyoxypropylene pentaerythritol ether into a mixed solution of diethylene glycol mono-n-butyl ether and water, and uniformly stirring to prepare a penetrant solution;
(2) And respectively adding the quaternary ammonium salt bactericide, didodecyldimethyldibenzyl tin ammonium chloride, dodecyl triphenyl phosphorus bromide and ditridecyltin oxide into the penetrating agent solution for mixing to prepare the high-efficiency bactericide.
Wherein:
the mixing time in the step (2) is 30min, and the stirring and mixing speed is 500r/min.
In the application of the high-efficiency bactericide described in this embodiment 2, the high-efficiency bactericide is added into the oilfield reinjection water, and the addition concentration of the bactericide is 5mg/l.
Example 3
The efficient bactericide described in this embodiment 3 is composed of the following raw materials by mass percent:
13 percent of quaternary ammonium salt bactericide
Didodecyldimethyldibenzyltin ammonium chloride 8%
Dodecyl triphenyl phosphonium bromide 3.5%
0.8 percent of dibutyltin oxide
20 percent of penetrating agent
The balance of water;
wherein: the quaternary ammonium salt bactericide is a mixture of N-metronidazole-N- (dodecyl dimethyl) -2-hydroxy-1, 3-ammonium dichloride (MHTD) and polychloro-2-hydroxypropyl-1, 1-N-dimethylamine, and the mass ratio of the MHTD to the polychloro-2-hydroxypropyl-1, 1-N-dimethylamine is 1.2.
The N-metronidazole-N- (dodecyl dimethyl) -2-hydroxy-1, 3-ammonium dichloride (MHTD) is prepared by firstly taking dodecyl dimethyl amine, hydrogen chloride and epichlorohydrin as raw materials to synthesize N- (3-chloro-2-hydroxypropyl) -N, N-dimethyldodecyl ammonium chloride; then N- (3-chloro-2-hydroxypropyl) -N, N-dimethyldodecyl ammonium chloride reacts with metronidazole to obtain the compound.
The penetrating agent is a mixture of trimethylolpropane polyoxypropylene polyoxyethylene ether, polyoxyethylene polyoxypropylene pentaerythritol ether and diethylene glycol mono-n-butyl ether, wherein the mass ratio of the trimethylolpropane polyoxypropylene polyoxyethylene ether to the polyoxyethylene polyoxypropylene pentaerythritol ether to the diethylene glycol mono-n-butyl ether is 1.25.
The preparation method of the high-efficiency bactericide described in this embodiment 3 comprises the following steps:
(1) Preparation of penetrant solution: adding trimethylolpropane polyoxypropylene polyoxyethylene ether and polyoxyethylene polyoxypropylene pentaerythritol ether into a mixed solution of diethylene glycol mono-n-butyl ether and water, and uniformly stirring to prepare a penetrant solution;
(2) And respectively adding the quaternary ammonium salt bactericide, didodecyldimethyldibenzyl tin ammonium chloride, dodecyl triphenyl phosphonium bromide and ditridecyltin oxide into the penetrating agent solution for mixing to prepare the high-efficiency bactericide.
Wherein:
the mixing time in the step (2) is 40min, and the stirring and mixing speed is 450r/min.
In the application of the high-efficiency bactericide described in this embodiment 3, the high-efficiency bactericide is added into the oilfield reinjection water, and the addition concentration of the bactericide is 5mg/l.
Comparative example 1
The preparation method and the application of the bactericide in the comparative example 1 are the same as those in the example 1, and the only difference is that the raw materials of the bactericide are different, and the bactericide in the comparative example 1 consists of the following raw materials in percentage by mass:
25 percent of quaternary ammonium salt bactericide
Dodecyl triphenyl phosphonium bromide 2.5%
0.5 percent of double tributyl tin oxide
22 percent of penetrating agent
The balance of water;
the quaternary ammonium salt bactericide and penetrant are the same as in example 1.
Comparative example 2
The preparation method and the application of the bactericide in the comparative example 2 are the same as those in the example 1, and the only difference is that the raw materials of the bactericide are different, and the bactericide in the comparative example 2 comprises the following raw materials in percentage by mass:
15 percent of quaternary ammonium salt bactericide
10 percent of didodecyldimethyldibenzyltin ammonium chloride
22 percent of penetrating agent
The balance of water;
the quaternary ammonium salt bactericide and penetrant are the same as in example 1.
Comparative example 3
The application of the bactericide in the comparative example 3 is the same as that of the bactericide in the example 1, and the only difference is that the bactericide is different in raw material composition, and the bactericide in the comparative example 3 is composed of the following raw materials in percentage by mass:
15 percent of quaternary ammonium salt bactericide
Didodecyl dimethyl dibenzyl tin ammonium chloride 10%
Dodecyl triphenyl phosphonium bromide 2.5%
0.5 percent of double tributyl tin oxide
The balance of water;
the quaternary ammonium salt bactericide is the same as in example 1.
The preparation method of the bactericide of comparative example 3 comprises the following steps: and respectively adding the quaternary ammonium salt bactericide, didodecyldimethyldibenzyl tin ammonium chloride, dodecyl triphenyl phosphorus bromide and ditridecyltin oxide into water, and uniformly mixing to prepare the high-efficiency bactericide.
Comparative example 4
The raw materials, preparation method and application of the bactericide in the comparative example 4 are the same as those in the example 1, and the only difference is that the composition of the quaternary ammonium salt bactericide in the raw materials is different, and the quaternary ammonium salt bactericide in the raw materials of the bactericide in the comparative example 4 is N-metronidazole-N- (dodecyl dimethyl) -2-hydroxy-1, 3-ammonium dichloride (MHTD).
Comparative example 5
The raw materials, preparation method and application of the bactericide in the comparative example 5 are the same as those in the example 1, and the only difference is that the composition of the quaternary ammonium salt bactericide in the raw materials is different, and the quaternary ammonium salt bactericide in the raw materials of the bactericide in the comparative example 5 is polychloro-2-hydroxypropyl-1, 1-N-dimethylamine.
The performance tests were carried out on the fungicides prepared in examples 1 to 3 and comparative examples 1 to 5, and the results are shown in the following table 1:
the sterilization rate is measured according to standard SY-T5757-2010 universal technical conditions for bactericide in oilfield injection water and SY-T0532-2012 bacteria analysis method-absolute dilution method for bactericide in oilfield injection water; according to SY-T5273-2000 'evaluation method of corrosion inhibitor performance for oilfield produced water' standard, a normal pressure static corrosion measuring method is adopted to research corrosion inhibition effect, and the corrosion inhibition effect is measured after standing for 10 days; results of bactericidal rate and sustained release rate are shown in table 1.
Claims (5)
1. A fungicide, characterized by: the composite material comprises the following raw materials in percentage by mass:
10 to 15 percent of quaternary ammonium salt bactericide
Didodecyldimethyldimethyl tin ammonium chloride 8-12%
Dodecyl triphenyl phosphonium bromide 2-3.5%
0.5 to 1.0 percent of double tributyl tin oxide
18 to 23 percent of penetrating agent
The balance of water is up to 100%;
wherein: the quaternary ammonium salt bactericide is a mixture of N-metronidazole-N- (dodecyl dimethyl) -2-hydroxy-1, 3-ammonium dichloride and polychloro-2-hydroxypropyl-1, 1-N-dimethylamine, wherein the mass ratio of the N-metronidazole-N- (dodecyl dimethyl) -2-hydroxy-1, 3-ammonium dichloride to the polychloro-2-hydroxypropyl-1, 1-N-dimethylamine is 1.2-1.3;
the penetrating agent is a mixture of trimethylolpropane polyoxypropylene polyoxyethylene ether, polyoxyethylene polyoxypropylene pentaerythritol ether and diethylene glycol mono-n-butyl ether; the mass ratio of the trimethylolpropane polyoxypropylene polyoxyethylene ether, the polyoxyethylene polyoxypropylene pentaerythritol ether and the diethylene glycol mono-n-butyl ether is (1).
2. The bactericide as claimed in claim 1, wherein: the composite material consists of the following raw materials in percentage by mass:
15 percent of quaternary ammonium salt bactericide
Didodecyl dimethyl dibenzyl tin ammonium chloride 10%
Dodecyl triphenyl phosphonium bromide 2.5%
0.5 percent of double tributyl tin oxide
22 percent of penetrating agent
The balance of water is up to 100%.
3. The bactericide as claimed in claim 1, wherein: the N-metronidazole-N- (dodecyl dimethyl) -2-hydroxy-1, 3-ammonium dichloride is prepared by firstly synthesizing N- (3-chloro-2-hydroxypropyl) -N, N-dimethyldodecyl ammonium chloride by taking dodecyl dimethyl amine, hydrogen chloride and epoxy chloropropane as raw materials; then N- (3-chloro-2-hydroxypropyl) -N, N-dimethyldodecyl ammonium chloride reacts with metronidazole to obtain the compound.
4. A method for producing the bactericide as claimed in claim 1, characterized in that: the method comprises the following steps:
(1) Preparing a penetrant mixed solution: adding trimethylolpropane polyoxypropylene polyoxyethylene ether and polyoxyethylene polyoxypropylene pentaerythritol ether into a mixed solution of diethylene glycol mono-n-butyl ether and water, and uniformly stirring to prepare a penetrant mixed solution;
(2) And respectively adding the quaternary ammonium salt bactericide, didodecyldimethyldibenzyl tin ammonium chloride, dodecyl triphenyl phosphonium bromide and ditridecyltin oxide into the penetrating agent mixed solution, stirring and mixing to prepare the bactericide.
5. The method for producing a bactericide as claimed in claim 4, wherein: in the step (2), the mixing time is 30-45min, and the stirring and mixing speed is 400-500r/min.
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| CN101875839A (en) * | 2009-04-30 | 2010-11-03 | 中国石油天然气股份有限公司 | Multifunctional preparation for controlling biological corrosion and blockage of oil field production system |
| CN105104421A (en) * | 2015-08-13 | 2015-12-02 | 中国海洋石油总公司 | Oilfield bactericide and preparation method therefor |
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| CN105104421A (en) * | 2015-08-13 | 2015-12-02 | 中国海洋石油总公司 | Oilfield bactericide and preparation method therefor |
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| 油田杀菌剂研究现状与展望;薛瑞等;《工业水处理》;20071020;第27卷(第10期);第1-4页 * |
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