Stable foam control agent with rapid dispersion

Abstract

The invention provides a stable foam control agent with rapid dispersion, which is mainly used in the petroleum industry and has the advantages of safety, stability and rapid dispersion. Compared with the traditionally used polyether ester, the selected fatty acid ester compound has longer carbon chain and better performance in the aspect of lasting foam breaking; the rapid dispersibility of the foam control agent is improved by adjusting the ratio of the ester compound to the wetting penetrant; the coating does not contain a solvent, is safer and more stable, and is suitable for long-term storage.

Description

Technical Field

[0001] The present invention relates to a stable foam control agent with rapid dispersion. Since the foam control agent belongs to fine chemicals, the present invention belongs to the technical field of fine chemical preparations. Technical Background

[0002] During the offshore oilfield exploitation process, a large amount of crude oil foam will cause fluctuations in the entire production process, threatening the safety of personnel and equipment. It is necessary to add defoamers to eliminate the foam. Silicone defoamers are the most widely used type of defoamers at this stage. Solvent-based silicone defoamers are the most commonly used defoamer variety. However, this type of defoamer consumes a large amount of organic solvents, the price of the agent is relatively high, and it is flammable and explosive. Emulsion-based silicone defoamers use water as a dispersant, which has the advantages of safety, environmental protection, non-flammability, and high defoaming efficiency, but many problems often arise during actual application.

[0003] Offshore platforms have objective factors such as long turnover cycle of chemicals, large temperature difference between winter and summer, and slender dosing pipelines. Therefore, the chemical agents used must not only meet the technical requirements, but also the physical indicators must meet the corresponding requirements. For silicone defoamer products, they must meet the requirements of good fluidity, good stability, resistance to high and low temperatures, and good resistance to mildew. At present, the most common problem of emulsion defoamers in field applications is particle precipitation, which gradually deposits and blocks the filter screen of the dosing pump during use. On-site operators need to clean the filter screen frequently, which increases the workload. At the same time, the deposition of active ingredients affects the use effect of the agent. In addition, emulsion defoamers often break emulsions, float oil, and mildew, which seriously affects the application and promotion of the product.

[0004] In order to ensure the safe production of offshore oil fields and overcome the shortcomings of the prior art, the present invention provides a stable foam control agent with rapid dispersion. Summary of the invention

[0005] The invention provides a foam control agent with a rapid dispersion function, which is mainly used in the petroleum industry and has the advantages of safety, stability and rapid dispersion.

[0006] The present invention selects fatty acid ester compounds, which have longer carbon chains than traditionally used polyether esters and have better performance in terms of sustained foam breaking; by adjusting the ratio of ester compounds to wetting and penetrating agents, the rapid dispersibility of the foam control agent is improved; the present invention does not contain solvents, making it safer and more stable and suitable for long-term storage.

[0007] A stable foam control agent with rapid dispersion, characterized in that it consists of the following substances:

[0008] A. Silicone emulsion

[0009] The organosilicon emulsion is a well-known technology in the art. The organosilicon emulsion is prepared according to the organosilicon composition described in patent CN113577835A, and its usage accounts for 10-50% of the total mass of the foam control agent.

[0010] B. Ester compounds

[0011] The ester compounds mainly include monoesters, diesters, and triesters, and are specifically selected from: methyl laurate, methyl stearate, coconut oil methyl ester, diisooctyl phthalate, tributyl phosphate, tributyl citrate, triisobutyl phosphate, trioctyl phosphate, isooctyl stearate, triphenyl phosphate, and one or more of tributyloxyethyl phosphate, which can be used alone or in combination;

[0012] The amount of the ester compound is 2-15% of the total mass of the foam control agent.

[0013] C. Wetting and penetrating agent

[0014] The wetting and penetrating agent is selected from sodium salt of alkyl sulfosuccinate and potassium salt of alkyl sulfosuccinate; specifically selected from: sodium dinonyl sulfosuccinate and sodium diisononyl sulfosuccinate, sodium dioctyl sulfosuccinate, sodium diheptyl sulfosuccinate, sodium dineopentyl sulfosuccinate, sodium diisopentyl sulfosuccinate, sodium di-n-pentyl sulfosuccinate, sodium dipentyl sulfosuccinate, sodium dibutyl sulfosuccinate, sodium diisobutyl sulfosuccinate, sodium dioctyl sulfosuccinate, sodium didecyl sulfosuccinate, sodium diundecyl sulfosuccinate, sodium dilauryl sulfosuccinate, sodium sulfosuccinate One or more of potassium diethylhexyl sulfoate, potassium dinonyl sulfosuccinate, potassium diisononyl sulfosuccinate, potassium dioctyl sulfosuccinate, potassium diheptyl sulfosuccinate, potassium dihexyl sulfosuccinate, dineopentyl sulfosuccinate, diisopentyl sulfosuccinate, di-n-pentyl sulfosuccinate, diamyl sulfosuccinate, potassium dibutyl sulfosuccinate, potassium diisobutyl sulfosuccinate, dioctyl sulfosuccinate, potassium didecyl sulfosuccinate, diundecyl sulfosuccinate, and potassium dilauryl sulfosuccinate can be used alone or in combination.

[0015] The amount of the wetting and penetrating agent used accounts for 1 to 8% of the total mass of the foam control agent.

[0016] D. diluent

[0017] The thickening water is selected from the group consisting of thickening water with a viscosity of 1500 to 3000 mPa·s, and its usage accounts for 30 to 80% of the total mass of the foam control agent.

[0018] The thickener used to prepare the thickened water is selected from one of xanthan gum, guar gum, polyvinyl alcohol, sodium carboxymethyl cellulose, hydroxyethyl cellulose, polyacrylic acid, polyacrylamide and polyacrylate.

[0019] E. Fungicide

[0020] The bactericide is selected from one of dodecyl dimethyl benzyl ammonium chloride, dodecyl dimethyl benzyl ammonium bromide, tetradecyl dimethyl benzyl ammonium chloride, polyquaternium salt, chlorine, chlorine dioxide, sodium dichloroisocyanurate (Ulujing), sodium trichloroisocyanurate, isothiazolinone, and benzisothiazolinone. Its dosage accounts for 0.5-2% of the total mass of the foam control agent.

[0021] The bactericide in the foam control agent of the present invention can make the foam control agent have a bactericidal function while defoaming, thereby avoiding the problem of bacterial corrosion caused by bacteria growing in the foam.

[0022] The preparation method of the foam control agent in the present invention does not involve conditions such as heating, freezing, and high pressure. It only needs to mix the components evenly. Users can add a certain amount of water to dilute the foam control agent during use.

[0023] A stable foam control agent with rapid dispersion, the preparation method of which is as follows:

[0024] First, an ester compound is added to thickened water, and then a wetting and penetrating agent is added and stirred evenly, and a mixture M is obtained by adjusting the ratio of the wetting and penetrating agent to the ester compound until there is no oil point, wherein the mass ratio of the wetting and penetrating agent to the ester compound is preferably 1:2-4:5;

[0025] Then, the organosilicon emulsion is added to the mixture M, and after mixing, a fungicide is added, and after stirring evenly, the foam control agent of the present invention is obtained. DETAILED DESCRIPTION

[0026] The preparation method of the organosilicon emulsion is as follows

[0027] Silicone Emulsion Silicone composition Emulsifier water Thickener Mechanical equipment A1 Example 1 Nonylphenol polyoxyethylene ether, sorbitan trioleate water Sodium Carboxymethyl Cellulose Colloid mill A2 Example 2 Sodium dodecyl polyoxyethylene ether sulfate, sodium dodecyl sulfonate water Hydroxyethyl Cellulose Homogenizer A3 Example 3 Sorbitan monostearate water Polyacrylamide Colloid mill A4 Example 4 Oleic acid polyoxyethylene ether, sodium lauryl sulfate water Polyacrylate Homogenizer

[0028] Example 1

[0029] First, 2 parts of tributyl phosphate were added to 55 parts of a polyvinyl alcohol aqueous solution with a viscosity of 3000 mPa·s, and then 1 part of sodium dinonyl sulfosuccinate was added and stirred evenly, and the ratio of sodium dinonyl sulfosuccinate to tributyl phosphate was adjusted to 1:2 without oil spots, to obtain a mixture M1;

[0030] Then, 40 parts of the organosilicon emulsion A1 are added to the mixture M1, and after mixing, 2 parts of dodecyl dimethyl benzyl ammonium chloride are added, and after stirring evenly, the foam control agent of the present invention is obtained.

[0031] Example 2

[0032] First, 3 parts of isooctyl stearate are added to 64 parts of a polyacrylic acid aqueous solution having a viscosity of 2000 mPa·s, and then 2 parts of potassium diethylhexyl sulfosuccinate are added and stirred evenly, and the ratio of potassium diethylhexyl sulfosuccinate to isooctyl stearate is adjusted to 2:3 without oil spots, to obtain a mixture M2;

[0033] Then, 30 parts of the organosilicon emulsion A2 are added to the mixture M2, and after mixing, 1 part of a polyquaternary ammonium salt is added, and after stirring evenly, the foam control agent of the present invention is obtained.

[0034] Example 3

[0035] First, 4 parts of methyl stearate were added to 42.5 parts of polyacrylamide aqueous solution with a viscosity of 2000 mPa·s, and then 3 parts of potassium dioctyl sulfosuccinate were added and stirred evenly, and the ratio of potassium dioctyl sulfosuccinate to methyl stearate was adjusted to 3:4 without oil spots, to obtain a mixture M3;

[0036] Then, 50 parts of the organosilicon emulsion A3 are added to the mixture M3, and after mixing, 0.5 parts of isothiazolinone is added, and after stirring evenly, the foam control agent of the present invention is obtained.

[0037] Example 4

[0038] First, 5 parts of dioctyl phthalate were added to 80 parts of a polyacrylate aqueous solution having a viscosity of 1500 mPa·s, and then 4 parts of dioctyl sodium sulfosuccinate were added and stirred evenly, and the ratio of dioctyl sodium sulfosuccinate to dioctyl phthalate was adjusted to 4:5 without oil spots, to obtain a mixture M4;

[0039] Then, 10 parts of the organosilicon emulsion A4 are added to the mixture M4, and after mixing, 1 part of dodecyl dimethyl benzyl ammonium bromide is added, and after stirring evenly, the foam control agent of the present invention is obtained.

[0040] Example 5

[0041] First, 7.5 parts of triphenyl phosphate were added to 50 parts of a sodium carboxymethyl cellulose aqueous solution having a viscosity of 1500 mPa·s, and then 5 parts of potassium dihexyl sulfosuccinate were added and stirred evenly, and the ratio of potassium dihexyl sulfosuccinate to triphenyl phosphate was adjusted to 2:3 without oil spots, to obtain a mixture M5;

[0042] Then, 37 parts of the organosilicon emulsion A4 are added to the mixture M5, and after mixing, 0.5 parts of tetradecyl dimethyl benzyl ammonium chloride are added, and after stirring evenly, the foam control agent of the present invention is obtained.

[0043] Example 6

[0044] First, 8 parts of triisobutyl phosphate were added to 60 parts of a xanthan gum aqueous solution having a viscosity of 3000 mPa·s, and then 6 parts of sodium diisoamyl sulfosuccinate were added and stirred evenly, and the ratio of sodium diisoamyl sulfosuccinate to triisobutyl phosphate was adjusted to 3:4 without oil spots, to obtain a mixture M6;

[0045] Then, 24.5 parts of the organosilicon emulsion A3 were added to the mixture M6, and after mixing, 1.5 parts of sodium dichloroisocyanurate (sodium chloramine) were added, and after stirring evenly, the foam control agent of the present invention was obtained.

[0046] Example 7

[0047] First, 14 parts of coconut oil methyl ester were added to 40 parts of hydroxyethyl cellulose aqueous solution with a viscosity of 2500 mPa·s, and then 7 parts of potassium dineopentyl sulfosuccinate were added and stirred evenly, and the ratio of potassium dineopentyl sulfosuccinate to coconut oil methyl ester was adjusted to 1:2 without oil spots, to obtain a mixture M7;

[0048] Then, 38 parts of the silicone emulsion A2 are added to the mixture M7, and after mixing, 1 part of dodecyl dimethyl benzyl ammonium chloride is added, and after stirring evenly, the foam control agent of the present invention is obtained.

[0049] Example 8

[0050] First, 10 parts of trioctyl phosphate were added to 65 parts of polyacrylamide aqueous solution with a viscosity of 1500 mPa·s, and then 8 parts of potassium dilauryl sulfosuccinate were added and stirred evenly, and the ratio of potassium dilauryl sulfosuccinate to trioctyl phosphate was adjusted to 4:5 without oil spots, to obtain a mixture M8;

[0051] Then, 15 parts of the organosilicon emulsion A1 are added to the mixture M8, and after mixing, 2 parts of polyquaternium salt are added, and after stirring evenly, the foam control agent of the present invention is obtained.

[0052] Example 9

[0053] First, 15 parts of triisobutyl phosphate were added to 30 parts of a polyacrylate aqueous solution having a viscosity of 2000 mPa·s, and then 7.5 parts of sodium diisobutyl sulfosuccinate were added and stirred evenly, and the ratio of sodium diisobutyl sulfosuccinate to triisobutyl phosphate was adjusted to 1:2 without oil spots, to obtain a mixture M9;

[0054] Then, 46.5 parts of the silicone emulsion A2 are added to the mixture M9, and after mixing, 1 part of dodecyl dimethyl benzyl ammonium chloride is added, and after stirring evenly, the foam control agent of the present invention is obtained.

[0055] Example 10

[0056] First, 10 parts of a mixture of tributyl citrate and triphenyl phosphate were added to 65 parts of a polyacrylamide aqueous solution having a viscosity of 1500 mPa·s, and then 8 parts of a mixture of sodium diisobutyl sulfosuccinate and sodium diisoamyl sulfosuccinate were added and stirred evenly, and the ratio of potassium dilauryl sulfosuccinate to trioctyl phosphate was adjusted to 4:5 without oil spots, to obtain a mixture M10;

[0057] Then, 15 parts of the organosilicon emulsion A1 are added to the mixture M10, and after mixing, 2 parts of polyquaternium salt are added, and after stirring evenly, the foam control agent of the present invention is obtained.

[0058] Embodiment 11

[0059] First, 15 parts of a mixture of tributoxyethyl phosphate and trioctyl phosphate were added to 30 parts of a polyacrylate aqueous solution having a viscosity of 2000 mPa·s, and then 7.5 parts of a mixture of potassium dinonyl sulfosuccinate and sodium di-n-pentyl sulfosuccinate were added and stirred evenly, and the ratio of sodium diisobutyl sulfosuccinate to triisobutyl phosphate was adjusted to 1:2 without oil spots, to obtain a mixture M11;

[0060] Then, 46.5 parts of the silicone emulsion A2 are added to the mixture M11, and after mixing, 1 part of dodecyl dimethyl benzyl ammonium chloride is added, and after stirring evenly, the foam control agent of the present invention is obtained.

[0061] Comparative Example 1

[0062] First, 3 parts of tributyl phosphate were added to 55 parts of a polyvinyl alcohol aqueous solution having a viscosity of 3000 mPa·s, and then 1 part of sodium dinonyl sulfosuccinate was added and stirred evenly, and the ratio of sodium dinonyl sulfosuccinate to tributyl phosphate was adjusted to 1:3 without oil spots, to obtain a mixture M12;

[0063] Then, 39 parts of the organosilicon emulsion A1 are added to the mixture M12, and after mixing, 2 parts of dodecyl dimethyl benzyl ammonium chloride are added, and after stirring evenly, the foam control agent of the present invention is obtained.

[0064] Comparative Example 2

[0065] First, 3 parts of isooctyl stearate are added to 64 parts of a polyacrylic acid aqueous solution having a viscosity of 2000 mPa·s, and then 2 parts of potassium diethylhexyl sulfosuccinate and 30 parts of silicone emulsion A2 are added and stirred evenly, and the ratio of potassium diethylhexyl sulfosuccinate to isooctyl stearate is adjusted to 2:3, without oil spots, and then 1 part of polyquaternium salt is added and stirred evenly to obtain the foam control agent of the present invention.

[0066] Comparative Example 3

[0067] First, 4 parts of methyl stearate and 50 parts of silicone emulsion A3 were mixed, and then 3 parts of potassium dioctyl sulfosuccinate were added and stirred evenly, and the ratio of potassium dioctyl sulfosuccinate to methyl stearate was adjusted to 3:4 without oil spots, to obtain a mixture M13;

[0068] Then, 42.5 parts of a polyacrylamide aqueous solution with a viscosity of 2000 mPa·s was added to the mixture M13, and after mixing, 0.5 parts of isothiazolinone was added, and after stirring evenly, the foam control agent of the present invention was obtained.

[0069] Comparative Example 4

[0070] First, 16 parts of dioctyl phthalate were added to 65 parts of a polyacrylate aqueous solution having a viscosity of 1500 mPa·s, and then 8 parts of dioctyl sodium sulfosuccinate were added and stirred evenly, and the ratio of dioctyl sodium sulfosuccinate to dioctyl phthalate was adjusted to 1:2 without oil spots, to obtain a mixture M14;

[0071] Then, 10 parts of the organosilicon emulsion A4 are added to the mixture M14, and after mixing, 1 part of dodecyl dimethyl benzyl ammonium bromide is added, and after stirring evenly, the foam control agent of the present invention is obtained.

[0072] Comparative Example 5

[0073] First, 15 parts of triphenyl phosphate were added to 37.5 parts of sodium carboxymethyl cellulose aqueous solution with a viscosity of 1500 mPa·s, and then 10 parts of potassium dihexyl sulfosuccinate were added and stirred evenly, and the ratio of potassium dihexyl sulfosuccinate to triphenyl phosphate was adjusted to 2:3 without oil spots, to obtain a mixture M15;

[0074] Then, 37 parts of the organosilicon emulsion A4 are added to the mixture M15, and after mixing, 0.5 parts of tetradecyl dimethyl benzyl ammonium chloride are added, and after stirring evenly, the foam control agent of the present invention is obtained.

[0075] Comparative Example 6

[0076] First, 8 parts of polyether ester were added to 60 parts of xanthan gum aqueous solution with a viscosity of 3000 mPa·s, and then 6 parts of sodium diisoamyl sulfosuccinate were added and stirred evenly, and the ratio of sodium diisoamyl sulfosuccinate to polyether ester was adjusted to 3:4 without oil spots, to obtain a mixture M16;

[0077] Then, 24.5 parts of the organosilicon emulsion A3 were added to the mixture M16, and after mixing, 1.5 parts of sodium dichloroisocyanurate (sodium chloramine) were added, and after stirring evenly, the foam control agent of the present invention was obtained.

[0078] Comparative Example 7

[0079] First, 14 parts of coconut oil methyl ester were added to 40 parts of hydroxyethyl cellulose aqueous solution with a viscosity of 2500 mPa·s, and then 7 parts of sorbitan monooleate were added and stirred evenly, and the ratio of sorbitan monooleate to coconut oil methyl ester was adjusted to 1:2 without oil spots, to obtain a mixture M17;

[0080] Then, 38 parts of the silicone emulsion A2 are added to the mixture M17, and after mixing, 1 part of dodecyl dimethyl benzyl ammonium chloride is added, and after stirring evenly, the foam control agent of the present invention is obtained.

[0081] Performance test (centrifugal stability, oil floating on the surface, defoaming performance)

[0082] 1. Centrifugal stability test

[0083] Test method: Place the foam control agent in a graduated centrifuge tube and centrifuge at 3000 rpm for 15 minutes. After centrifugation, observe whether the emulsion in the centrifuge tube is separated into layers.

[0084] Foam Control Agents Centrifugal stability Example 1 No stratification Example 2 No stratification Example 3 No stratification Example 4 No stratification Example 5 No stratification Example 6 No stratification Example 7 No stratification Example 8 No stratification Example 9 No stratification Example 10 No stratification Embodiment 11 No stratification Comparative Example 1 Layering, oily substance precipitated on the upper layer Comparative Example 2 Layering Comparative Example 3 Layering Comparative Example 4 Layering Comparative Example 5 Layering, oily substance precipitated on the upper layer Comparative Example 6 Layering Comparative Example 7 Layering, oily substance precipitated on the upper layer

[0085] 2. High temperature stability test

[0086] The stability of the sample was tested using a Formulaction / Turbiscan Tower / Multiple Light Scattering Stability Analyzer. The test temperature was 40°C and the sample amount was 20 g. The smaller the TSI index in the test results, the better the sample stability.

[0087] Foam Control Agents High temperature stability Example 1 0.5 Example 2 0.7 Example 3 0.5 Example 4 0.6 Example 5 0.7 Example 6 0.7 Example 7 0.6 Example 8 0.5 Example 9 0.5 Example 10 0.6 Embodiment 11 0.5 Comparative Example 1 2.1 Comparative Example 2 1.8 Comparative Example 3 1.7 Comparative Example 4 1.7 Comparative Example 5 2.0 Comparative Example 6 1.8 Comparative Example 7 2.1

[0088] 3. Dispersion test

[0089] Add 0.5g of silicone emulsion into a beaker, then add 100g of water, shake, and observe its dispersion in water. If it disperses quickly and there is no oily matter on the liquid surface, the water dispersibility is excellent; if it disperses quickly and there is no oily matter on the liquid surface, the water dispersibility is good; if it disperses slowly and a small amount of floccules appear on the liquid surface, the water dispersibility is medium; if it is not easy to disperse and the floccules are difficult to disappear, the water dispersibility is poor.

[0090] Foam Control Agents Dispersibility Example 1 excellent Example 2 excellent Example 3 excellent Example 4 excellent Example 5 excellent Example 6 excellent Example 7 excellent Example 8 excellent Example 9 excellent Example 10 excellent Embodiment 11 excellent Comparative Example 1 Difference Comparative Example 2 middle Comparative Example 3 middle Comparative Example 4 good Comparative Example 5 Difference Comparative Example 6 middle Comparative Example 7 Difference

Claims

1. A stable foam control agent with rapid dispersion, characterized in that The foam control agent consists of the following components: Component A is an organosilicon emulsion, which is prepared according to the organosilicon composition described in the well-known technical patent CN113577835A in the art, and its amount accounts for 10-50% of the total mass of the foam control agent; Component B: ester compound, the amount of which accounts for 2-15% of the total mass of the foam control agent; Component C: wetting and penetrating agent, the amount of which accounts for 1 to 8% of the total mass of the foam control agent; Component D diluent, its usage accounts for 30-80% of the total mass of the foam control agent; Component E is a fungicide, and its usage accounts for 0.5 to 2% of the total mass of the foam control agent.

2. A stable foam control agent with rapid dispersion as claimed in claim 1, characterized in that The ester compounds mainly include monoester, diester and triester compounds.

3. A stable foam control agent with rapid dispersion as claimed in claim 1, characterized in that The ester compound is specifically selected from: one or more of methyl laurate, methyl stearate, coconut oil methyl ester, diisooctyl phthalate, tributyl phosphate, tributyl citrate, triisobutyl phosphate, trioctyl phosphate, isooctyl stearate, triphenyl phosphate, and tributoxyethyl phosphate, and can be used alone or in combination.

4. A stable foam control agent with rapid dispersion as claimed in claim 1, characterized in that The wetting and penetrating agent is selected from sodium salt of alkyl sulfosuccinate and potassium salt of alkyl sulfosuccinate.

5. A stable foam control agent with rapid dispersion as claimed in claim 1, characterized in that The wetting and penetrating agent is specifically selected from dinonyl sodium sulfosuccinate and diisononyl sodium sulfosuccinate, dioctyl sodium sulfosuccinate, diheptyl sodium sulfosuccinate, dineopentyl sodium sulfosuccinate, diisopentyl sodium sulfosuccinate, di-n-pentyl sodium sulfosuccinate, dipentyl sodium sulfosuccinate, dibutyl sodium sulfosuccinate, diisobutyl sodium sulfosuccinate, dioctyl sodium sulfosuccinate, didecyl sodium sulfosuccinate, diundecyl sodium sulfosuccinate, dilauryl sodium sulfosuccinate, diethylhexyl potassium sulfosuccinate, sulfosuccinate One or more of potassium dinonyl sulfosuccinate, potassium diisononyl sulfosuccinate, potassium dioctyl sulfosuccinate, potassium diheptyl sulfosuccinate, potassium dihexyl sulfosuccinate, potassium dineopentyl sulfosuccinate, potassium diisopentyl sulfosuccinate, potassium di-n-pentyl sulfosuccinate, potassium diamyl sulfosuccinate, potassium dibutyl sulfosuccinate, potassium diisobutyl sulfosuccinate, dioctyl sulfosuccinate, potassium didecyl sulfosuccinate, potassium diundecyl sulfosuccinate, and potassium dilauryl sulfosuccinate can be used alone or in combination.

6. A stable foam control agent with rapid dispersion as claimed in claim 1, characterized in that The diluent is selected from thickened water with a viscosity of 1500 to 3000 mPa·s.

7. A stable foam control agent with rapid dispersion as claimed in claim 1, characterized in that The thickener used to prepare the diluent is selected from one of xanthan gum, guar gum, polyvinyl alcohol, sodium carboxymethyl cellulose, hydroxyethyl cellulose, polyacrylic acid, polyacrylamide and polyacrylate.

8. A stable foam control agent with rapid dispersion as claimed in claim 1, characterized in that The bactericide is selected from one of dodecyl dimethyl benzyl ammonium chloride, dodecyl dimethyl benzyl ammonium bromide, tetradecyl dimethyl benzyl ammonium chloride, polyquaternium salt, chlorine, chlorine dioxide, sodium dichloroisocyanurate (Urochlor), sodium trichloroisocyanurate, isothiazolinone, and benzisothiazolinone.

9. A stable foam control agent with rapid dispersion as claimed in claim 1, characterized in that The stable foam control agent with rapid dispersion is characterized in that its preparation method is as follows: First, the ester compound is added to the thickened water, and then the wetting and penetrating agent is added and stirred evenly, and the ratio of the wetting and penetrating agent to the ester compound is adjusted until there is no oil point to obtain a mixture M; Then, the organosilicon emulsion is added to the mixture M, and after mixing, a fungicide is added, and after stirring evenly, the foam control agent of the present invention is obtained.

10. A stable foam control agent with rapid dispersion as claimed in claim 1, characterized in that The stable foam control agent with rapid dispersion has a mass ratio of the wetting and penetrating agent to the ester compound of 1:2 to 4:5 during its preparation.