Stable foam control agent having rapid dispersion ability

Abstract

Provided in the present invention is a stable foam control agent having rapid dispersion ability. The foam control agent is mainly used in the petroleum industry, and has the advantages of safety, stability and rapid dispersion ability. A fatty acid ester compound is selected and used in the present invention, and as compared with a traditionally used polyether ester, the fatty acid ester compound has a longer carbon chain and better performance in terms of long-term foam breaking. By adjusting the ratio of an ester compound to a wetting and penetrating agent, the rapid dispersion ability of the foam control agent is improved. A solvent is not contained in the present invention, making the foam control agent safer and more stable, and suitable for long-term storage.

Description

A stable foam control agent with rapid dispersion Technical Field

[0001] This invention relates to a stable foam control agent with rapid dispersion. Since foam control agents belong to the category of fine chemicals, this invention belongs to the field of fine chemical formulation technology. Background Technology

[0002] In offshore oilfield extraction, large amounts of crude oil foam can cause fluctuations in the entire production process, threatening personal and equipment safety. Defoamers must be added to eliminate this foam, and silicone-based defoamers are currently the most widely used type. Solvent-based silicone defoamers are the most commonly used type. However, these defoamers consume large amounts of organic solvents, are expensive, and are flammable and explosive. Emulsion-type silicone defoamers use water as a dispersant and have advantages such as safety, environmental friendliness, non-flammability, and high defoaming efficiency, but they often encounter numerous problems in practical applications.

[0003] Offshore platforms present challenges such as long chemical turnover cycles, significant diurnal and seasonal temperature variations, and long, narrow dosing pipelines. Therefore, the chemical agents used must not only meet technical requirements but also possess corresponding physical properties. For silicone defoamers, good flowability, stability, resistance to high and low temperatures, and resistance to mold are essential. Currently, the most common problem with emulsion-type defoamers in field applications is particle precipitation, which gradually deposits and clogs the dosing pump filter during use. This necessitates frequent filter cleaning by on-site operators, increasing workload. Simultaneously, the deposition of active ingredients affects the agent's effectiveness. Furthermore, emulsion-type defoamers frequently experience demulsification, oil spillage, and mold growth, severely impacting product application and promotion.

[0004] To ensure safe production in offshore oil fields and overcome the shortcomings of existing technologies, this invention provides a stable foam control agent with rapid dispersion. Summary of the Invention

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

[0006] This invention uses fatty acid ester compounds, which have longer carbon chains than traditionally used polyether esters, resulting in superior performance in 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. This invention is solvent-free, making it safer, more stable, and suitable for long-term storage.

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

[0008] A. Silicone emulsion

[0009] The silicone emulsion is a well-known technology in the field. The silicone emulsion is prepared according to the silicone composition described in patent CN113577835A, and its amount 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 trimer compounds, specifically selected from one or more of the following: methyl laurate, methyl stearate, methyl coconut oil, diisooctyl phthalate, tributyl phosphate, tributyl citrate, triisobutyl phosphate, trioctyl phosphate, isooctyl stearate, triphenyl phosphate, and tributyloxyethyl phosphate. They can be used alone or in combination.

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

[0013] C. Wetting and penetrating agents

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

[0015] The amount of the wetting and penetrating agent is 1-8% of the total mass of the foam control agent.

[0016] D. Diluent

[0017] Thickening water with a viscosity of 1500–3000 mPa·s is selected. Its dosage accounts for 30–80% of the total mass of the foam control agent.

[0018] The thickener used in preparing the thickening water is selected from one of xanthan gum, guar gum, polyvinyl alcohol, sodium carboxymethyl cellulose, hydroxyethyl cellulose, polyacrylic acid, polyacrylamide, and polyacrylates.

[0019] E. Bactericides

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

[0021] The bactericide in the foam control agent of this invention enables the foam control agent to have a bactericidal function while defoaming, avoiding bacterial corrosion problems caused by bacteria growing in the foam.

[0022] The foam control agent preparation method of this invention does not involve heating, freezing, high pressure or other conditions. It only requires that the components be mixed evenly. Users can add a certain amount of water to dilute it before use.

[0023] A stable foam control agent with rapid dispersion is prepared as follows:

[0024] First, the ester compound is added to the thickening water, then the wetting and penetrating agent is added and stirred evenly. By adjusting the ratio of the wetting and penetrating agent to the ester compound, until there are no oil spots, a mixture M is obtained. The preferred mass ratio of the wetting and penetrating agent to the ester compound is 1:2 to 4:5.

[0025] Then, add the silicone emulsion to mixture M, mix, add the bactericide, and stir evenly to obtain the foam control agent of the present invention. Detailed Implementation

[0026] The method for preparing the organosilicon emulsion is as follows:

[0027] Example 1

[0028] First, add 2 parts of tributyl phosphate to 55 parts of polyvinyl alcohol aqueous solution with a viscosity of 3000 mPa·s, then add 1 part of sodium dinonyl sulfosuccinate and stir evenly. Adjust the ratio of sodium dinonyl sulfosuccinate to tributyl phosphate to 1:2. No oil spots are found, and mixture M1 is obtained.

[0029] Then add 40 parts of organosilicon emulsion A1 to mixture M1, mix, add 2 parts of dodecyl dimethyl benzyl ammonium chloride, stir evenly, and the foam control agent of the present invention is obtained.

[0030] Example 2

[0031] First, add 3 parts of isooctyl stearate to 64 parts of polyacrylic acid aqueous solution with a viscosity of 2000 mPa·s, then add 2 parts of potassium diethylhexyl sulfosuccinate and stir evenly. Adjust the ratio of potassium diethylhexyl sulfosuccinate to isooctyl stearate to 2:3. No oil spots are found, and mixture M2 is obtained.

[0032] Add 30 parts of silicone emulsion A2 to mixture M2, mix, add 1 part of polyquaternium salt, and stir evenly to obtain the foam control agent of the present invention.

[0033] Example 3

[0034] First, add 4 parts of methyl stearate to 42.5 parts of an aqueous solution of polyacrylamide with a viscosity of 2000 mPa·s, then add 3 parts of potassium dioctyl sulfosuccinate and stir until homogeneous. Adjust the ratio of potassium dioctyl sulfosuccinate to methyl stearate to 3:4. No oil spots are found, and mixture M3 is obtained.

[0035] Add 50 parts of silicone emulsion A3 to mixture M3, mix, add 0.5 parts of isothiazolinone, and stir evenly to obtain the foam control agent of the present invention.

[0036] Example 4

[0037] First, add 5 parts of diisooctyl phthalate to 80 parts of polyacrylate aqueous solution with a viscosity of 1500 mPa·s, then add 4 parts of sodium dioctyl sulfosuccinate and stir evenly. Adjust the ratio of sodium dioctyl sulfosuccinate and diisooctyl phthalate to 4:5. No oil spots are found, and mixture M4 is obtained.

[0038] Then add 10 parts of silicone emulsion A4 to mixture M4, mix, add 1 part of dodecyl dimethyl benzyl ammonium bromide, and stir evenly to obtain the foam control agent of the present invention.

[0039] Example 5

[0040] First, add 7.5 parts of triphenyl phosphate to 50 parts of sodium carboxymethyl cellulose aqueous solution with a viscosity of 1500 mPa·s, then add 5 parts of potassium dihexyl sulfosuccinate and stir evenly. Adjust the ratio of potassium dihexyl sulfosuccinate to triphenyl phosphate to 2:3. No oil spots are found, and the mixture M5 is obtained.

[0041] Then add 37 parts of silicone emulsion A4 to mixture M5, mix, add 0.5 parts of tetradecyl dimethyl benzyl ammonium chloride, and stir evenly to obtain the foam control agent of the present invention.

[0042] Example 6

[0043] First, add 8 parts of triisobutyl phosphate to 60 parts of xanthan gum aqueous solution with a viscosity of 3000 mPa·s, then add 6 parts of sodium diisopentyl sulfosuccinate and stir evenly. Adjust the ratio of sodium diisopentyl sulfosuccinate and triisobutyl phosphate to 3:4. No oil spots are found, and the mixture M6 is obtained.

[0044] Then add 24.5 parts of silicone emulsion A3 to mixture M6, mix, add 1.5 parts of sodium dichloroisocyanurate (dichloroisocyanurate), stir evenly, and the foam control agent of the present invention is obtained.

[0045] Example 7

[0046] 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. Then, 7 parts of potassium di-neopentyl sulfosuccinate were added and stirred evenly. The ratio of potassium di-neopentyl sulfosuccinate to coconut oil methyl ester was adjusted to 1:2. No oil spots were observed, and the mixture M7 was obtained.

[0047] Then add 38 parts of organosilicon emulsion A2 to mixture M7, mix, add 1 part of dodecyl dimethyl benzyl ammonium chloride, and stir evenly to obtain the foam control agent of the present invention.

[0048] Example 8

[0049] First, add 10 parts of trioctyl phosphate to 65 parts of polyacrylamide aqueous solution with a viscosity of 1500 mPa·s, then add 8 parts of potassium dilauryl sulfosuccinate and stir evenly. Adjust the ratio of potassium dilauryl sulfosuccinate to trioctyl phosphate to 4:5. No oil spots are found, and mixture M8 is obtained.

[0050] Add 15 parts of silicone emulsion A1 to mixture M8, mix, then add 2 parts of polyquaternium salt, and stir evenly to obtain the foam control agent of the present invention.

[0051] Example 9

[0052] First, add 15 parts of triisobutyl phosphate to 30 parts of an aqueous polyacrylate solution with a viscosity of 2000 mPa·s, then add 7.5 parts of sodium diisobutyl sulfosuccinate and stir until homogeneous. Adjust the ratio of sodium diisobutyl sulfosuccinate to triisobutyl phosphate to 1:2. No oil spots are observed, and the mixture M9 is obtained.

[0053] Then add 46.5 parts of organosilicon emulsion A2 to mixture M9, mix, add 1 part of dodecyl dimethyl benzyl ammonium chloride, and stir evenly to obtain the foam control agent of the present invention.

[0054] Example 10

[0055] First, add 10 parts of a mixture of tributyl citrate and triphenyl phosphate to 65 parts of an aqueous solution of polyacrylamide with a viscosity of 1500 mPa·s, then add 8 parts of a mixture of sodium diisobutyl sulfosuccinate and sodium diisopentyl sulfosuccinate and stir until homogeneous. Adjust the ratio of potassium dilauryl sulfosuccinate and trioctyl phosphate to 4:5. No oil spots are observed, and mixture M10 is obtained.

[0056] Add 15 parts of silicone emulsion A1 to mixture M10, mix, then add 2 parts of polyquaternium salt, and stir evenly to obtain the foam control agent of the present invention.

[0057] Example 11

[0058] First, a mixture of 15 parts of tributyloxyethyl phosphate and trioctyl phosphate was added to 30 parts of an aqueous polyacrylate solution with a viscosity of 2000 mPa·s. Then, a mixture of 7.5 parts of potassium dinonyl sulfosuccinate and sodium di-n-pentyl sulfosuccinate was added and stirred until homogeneous. The ratio of sodium diisobutyl sulfosuccinate and triisobutyl phosphate was adjusted to 1:2. No oil spots were observed, and the mixture M11 was obtained.

[0059] Then add 46.5 parts of silicone emulsion A2 to mixture M11, mix, add 1 part of dodecyl dimethyl benzyl ammonium chloride, and stir evenly to obtain the foam control agent of the present invention.

[0060] Comparative Example 1

[0061] First, add 3 parts of tributyl phosphate to 55 parts of polyvinyl alcohol aqueous solution with a viscosity of 3000 mPa·s, then add 1 part of sodium dinonyl sulfosuccinate and stir evenly. Adjust the ratio of sodium dinonyl sulfosuccinate to tributyl phosphate to 1:3. No oil spots are found, and the mixture M12 is obtained.

[0062] Then, 39 parts of organosilicon emulsion A1 are added to mixture M12, and after mixing, 2 parts of dodecyl dimethyl benzyl ammonium chloride are added and stirred evenly to obtain the foam control agent of the present invention.

[0063] Comparative Example 2

[0064] First, add 3 parts of isooctyl stearate to 64 parts of a polyacrylic acid aqueous solution with a viscosity of 2000 mPa·s, then add 2 parts of potassium diethylhexyl sulfosuccinate and 30 parts of silicone emulsion A2 and stir evenly. Adjust the ratio of potassium diethylhexyl sulfosuccinate and isooctyl stearate to 2:3, ensuring no oil spots, then add 1 part of polyquaternary ammonium salt and stir evenly to obtain the foam control agent of this invention.

[0065] Comparative Example 3

[0066] First, mix 4 parts of methyl stearate and 50 parts of silicone emulsion A3, then add 3 parts of potassium dioctyl sulfosuccinate and stir until homogeneous. Adjust the ratio of potassium dioctyl sulfosuccinate to methyl stearate to 3:4. No oil spots are found, and the mixture M13 is obtained.

[0067] Then, 42.5 parts of an aqueous solution of polyacrylamide with a viscosity of 2000 mPa·s were added to mixture M13. After mixing, 0.5 parts of isothiazolinone were added and stirred evenly to obtain the foam control agent of the present invention.

[0068] Comparative Example 4

[0069] First, 16 parts of diisooctyl phthalate were added to 65 parts of an aqueous polyacrylate solution with a viscosity of 1500 mPa·s. Then, 8 parts of sodium dioctyl sulfosuccinate were added and stirred evenly. The ratio of sodium dioctyl sulfosuccinate to diisooctyl phthalate was adjusted to 1:2. No oil spots were observed, and the mixture M14 was obtained.

[0070] Then add 10 parts of silicone emulsion A4 to mixture M14, mix, add 1 part of dodecyl dimethyl benzyl ammonium bromide, and stir evenly to obtain the foam control agent of the present invention.

[0071] Comparative Example 5

[0072] First, add 15 parts of triphenyl phosphate to 37.5 parts of sodium carboxymethyl cellulose aqueous solution with a viscosity of 1500 mPa·s, then add 10 parts of potassium dihexyl sulfosuccinate and stir evenly. Adjust the ratio of potassium dihexyl sulfosuccinate to triphenyl phosphate to 2:3. No oil spots are found, and the mixture M15 is obtained.

[0073] Then add 37 parts of silicone emulsion A4 to mixture M15, mix, add 0.5 parts of tetradecyl dimethyl benzyl ammonium chloride, and stir evenly to obtain the foam control agent of the present invention.

[0074] Comparative Example 6

[0075] First, add 8 parts of polyether ester to 60 parts of xanthan gum aqueous solution with a viscosity of 3000 mPa·s, then add 6 parts of sodium diisopentyl sulfosuccinate and stir evenly. Adjust the ratio of sodium diisopentyl sulfosuccinate to polyether ester to 3:4. No oil spots are found, and the mixture M16 is obtained.

[0076] Then add 24.5 parts of silicone emulsion A3 to mixture M16, mix, add 1.5 parts of sodium dichloroisocyanurate (dichloroisocyanurate), stir evenly, and the foam control agent of the present invention is obtained.

[0077] Comparative Example 7

[0078] 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 dehydrated sorbitan monooleate were added and stirred evenly. The ratio of dehydrated sorbitan monooleate to coconut oil methyl ester was adjusted to 1:2. No oil spots were found, and the mixture M17 was obtained.

[0079] Then add 38 parts of silicone emulsion A2 to mixture M17, mix, add 1 part of dodecyl dimethyl benzyl ammonium chloride, and stir evenly to obtain the foam control agent of the present invention.

[0080] Performance testing (centrifugal stability, appearance (oil shedding), defoaming performance)

[0081] 1. Centrifugal stability test

[0082] Test method: Place the foam control agent into a graduated centrifuge tube and centrifuge at 3000 rpm for 15 minutes. After centrifugation, observe whether the emulsion in the centrifuge tube separates into layers.

[0083] 2. High-temperature stability test

[0084] The stability of the samples was tested using a Formulaction / Turbiscan Tower / Multiple Light Scattering Stability Analyzer at a temperature of 40℃ and a sample volume of 20g. The lower the TSI index in the test results, the better the sample stability.

[0085] 3. Dispersion test

[0086] Add 0.5g of silicone emulsion to a beaker, then add 100g of water, shake, and observe its dispersion in water. If it disperses quickly and there is no oily substance on the liquid surface, the water dispersibility is excellent; if it disperses relatively quickly and there is no oily substance on the liquid surface, the water dispersibility is good; if it disperses relatively slowly and a small amount of flocculent matter appears on the liquid surface, the water dispersibility is moderate; if it is not easy to disperse and the flocculent matter is difficult to disappear, the water dispersibility is poor.

Claims

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

2. The foam control agent with rapid dispersion as described in claim 1, characterized in that... The ester compounds mainly include monoesters, diesters, and trimerates.

3. The foam control agent with rapid dispersion as described in claim 1, characterized in that... The ester compounds are specifically selected from one or more of the following: methyl lauryl acid, methyl stearate, methyl coconut oil, diisooctyl phthalate, tributyl phosphate, tributyl citrate, triisobutyl phosphate, trioctyl phosphate, isooctyl stearate, triphenyl phosphate, and tributyloxyethyl phosphate. They can be used alone or in combination.

4. The foam control agent with rapid dispersion as described 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 described in claim 1, characterized in that... The wetting and penetrating agent is specifically selected from sodium dinonyl sulfosuccinate and sodium diisononyl sulfosuccinate, sodium dioctyl sulfosuccinate, sodium diheptyl sulfosuccinate, sodium dineopentyl sulfosuccinate, sodium diisopentyl sulfosuccinate, sodium din-pentyl sulfosuccinate, sodium dipentyl sulfosuccinate, sodium dibutyl sulfosuccinate, sodium diisobutyl sulfosuccinate, sodium dioctyl sulfosuccinate, sodium didecyl sulfosuccinate, sodium diundecyl sulfosuccinate, sodium dilauryl sulfosuccinate, potassium diethylhexyl sulfosuccinate, and sodium disulfosuccinate. Potassium dinonyl ester, potassium diisononyl sulfosuccinate, potassium dioctyl sulfosuccinate, potassium diheptyl sulfosuccinate, potassium dihexyl sulfosuccinate, potassium dineopentyl sulfosuccinate, potassium diisopentyl sulfosuccinate, potassium din-pentyl sulfosuccinate, potassium dipentyl sulfosuccinate, potassium dibutyl sulfosuccinate, potassium diisobutyl sulfosuccinate, potassium 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 described in claim 1, characterized in that... The diluent is selected from thickening water with a viscosity of 1500-3000 mPa·s.

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

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

9. A stable foam control agent with rapid dispersion as described in claim 1, characterized in that... The stable foam control agent with rapid dispersion is characterized by the following preparation method: First, add the ester compound to the thickening water, then add the wetting and penetrating agent and stir well. Adjust the ratio of the wetting and penetrating agent to the ester compound until there are no oil spots, and obtain mixture M. Then, add the silicone emulsion to mixture M, mix, add the bactericide, and stir evenly to obtain the foam control agent of the present invention.

10. A stable foam control agent with rapid dispersion as described in claim 1, characterized in that... The aforementioned stable foam control agent with rapid dispersion is prepared in a mass ratio of wetting and penetrating agent to ester compound of 1:2 to 4:5.

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