CN114949940B - Defoaming agent for oil field and preparation method thereof - Google Patents
Defoaming agent for oil field and preparation method thereof Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D19/00—Degasification of liquids
- B01D19/02—Foam dispersion or prevention
- B01D19/04—Foam dispersion or prevention by addition of chemical substances
- B01D19/0404—Foam dispersion or prevention by addition of chemical substances characterised by the nature of the chemical substance
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D19/00—Degasification of liquids
- B01D19/02—Foam dispersion or prevention
- B01D19/04—Foam dispersion or prevention by addition of chemical substances
- B01D19/0404—Foam dispersion or prevention by addition of chemical substances characterised by the nature of the chemical substance
- B01D19/0409—Foam dispersion or prevention by addition of chemical substances characterised by the nature of the chemical substance compounds containing Si-atoms
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Abstract
The invention relates to the technical field of preparation of oilfield chemical agents, and particularly relates to a defoaming agent for an oilfield and a preparation method thereof. On the basis of taking polydimethylsiloxane as a main defoaming active ingredient, a proper amount of microcrystalline cellulose and a specific synergist are added, and the three are scientifically compounded to play a synergistic interaction role, so that the defoaming performance of the defoaming agent is greatly improved. Due to the addition of the microcrystalline cellulose, the larger molecular structure of the microcrystalline cellulose can improve the heat resistance of the system, so that the defoaming agent has excellent thermal stability, and the defoaming performance is reduced to a small extent after the defoaming agent is aged for 10 days at a high temperature of 80 ℃. In addition, the raw material of the defoaming agent is wide and easy to obtain, the preparation method is simple and convenient, and the requirements of oil field operation under various conditions can be met.
Description
Technical Field
The invention relates to the technical field of preparation of oilfield chemical agents, and particularly relates to a defoaming agent for an oilfield and a preparation method thereof.
Background
In the process of extracting and treating crude oil, the gas-liquid balance is destroyed by the temperature rise and the pressure reduction, so that light hydrocarbon dissolved in the crude oil is converted into gas to escape. However, because of the influence of factors such as oil phase viscosity, space and flow, the light hydrocarbon is difficult to escape from the surface of the crude oil smoothly, and bubbles are formed in the crude oil, so that the volume of the crude oil is expanded, and foams are generated. The existence of the bubbles can cause unstable production liquid conveying in the pipeline, and simultaneously can reduce the effective separation space in equipment, thereby seriously influencing the development and operation of the oil field. In order to eliminate or reduce foam, a defoaming agent is generally added in actual operation, at present, an organic silicon defoaming agent is the most applied defoaming agent, the price is low, the application range is wide, but the organic silicon dispersibility is poor, the organic silicon can not be rapidly diffused in crude oil, and the defoaming effect is poor.
CN106267910A discloses an antifoaming agent, which comprises the following components in percentage by weight: 5-10% of organic siloxane, 5-10% of fatty alcohol and/or fatty acid ester, 0.2-2% of thickening agent, 1-5% of emulsifying agent, 0.1-0.5% of bactericide, 5-10% of antifreezing agent and the balance of water. The defoaming agent is claimed to be capable of effectively eliminating bubbles generated in the preparation process of the well cementation working fluid, and the cost is low; excellent chemical compatibility; and simultaneously, other properties of the well cementation working fluid are not affected. However, the defoaming agent has not been studied with respect to the dispersing property of silicone, and it is also expected that the defoaming agent does not have an excellent defoaming effect according to the compounding of its components.
CN111389058A discloses a preparation method of a green environment-friendly type easily-dispersible crude oil defoaming agent, which is characterized by comprising the following steps: the preparation method comprises the following steps of mixing nano graphene, low-viscosity silicone oil and polyether according to a ratio of 0.5:1-2: mixing and stirring at the mass ratio of 0.5-2, putting the obtained mixture into a pressurized reaction kettle, adding a proper amount of catalyst, stirring and mixing at the temperature of 70-90 ℃, controlling the pressure of the reaction kettle to be kept at 0.10-0.25Mpa, stirring for reaction for 2-5h, adding the composite surfactant and the organic alcohol amine, stirring uniformly, and adding the solvent oil to obtain the crude oil defoamer. The defoaming agent improves the dispersibility of defoaming components by adding low-viscosity silicone oil, however, the improvement of the dispersibility is limited by simply reducing the viscosity of the silicone oil, and the defoaming agent also uses a polyether component, so that the product cost is higher, and the popularization and the use are difficult.
Therefore, the existing defoaming agent for oil field has the problems of poor siloxane dispersibility, poor defoaming effect or high defoaming effect but high cost, and the development of a defoaming agent with excellent defoaming effect, stability and low product cost is urgently needed.
Disclosure of Invention
The invention aims to provide a defoaming agent for oil fields, microcrystalline cellulose is added into a siloxane defoaming agent system, the dispersing performance of siloxane is obviously improved, the defoaming performance of the defoaming agent is further improved by adding a specific synergist, and the defoaming agent has the advantages of wide and easily-obtained raw material sources and simple and convenient preparation method.
In order to realize the purpose, the invention adopts the following technical scheme:
the defoaming agent for the oil field is characterized by comprising the following components in percentage by weight: 10-30 parts of polydimethylsiloxane, 8-20 parts of microcrystalline cellulose, 5-10 parts of bactericide, 0-5 parts of synergist and the balance of solvent; the microcrystalline cellulose is prepared by acidolysis of a cellulose plant raw material, the solvent comprises water and an alcohol ether solvent, and the mass ratio of the water to the alcohol ether solvent is 1-3:1; wherein, when the weight percentage of the polydimethylsiloxane is more than 10, the weight percentage of the synergist is not 0.
Further, the polydimethylsiloxane is amino modified polydimethylsiloxane, and the molecular structure of the polydimethylsiloxane has one or more than one amino groups.
Preferably, the bactericide is one or more of cason and a cationic surfactant, and the cationic surfactant is a quaternary ammonium salt.
Preferably, the synergist is span 60 or span 80.
Preferably, the alcohol ether solvent is one or more than two of diethylene glycol monobutyl ether, propylene glycol butyl ether and diethylene glycol hexyl ether.
Preferably, the defoaming agent for the oil field is characterized by comprising the following components in percentage by weight: 25 parts of polydimethylsiloxane, 16 parts of microcrystalline cellulose, 8 parts of bactericide, 3 parts of synergist, 24 parts of alcohol ether solvent and 24 parts of water.
Preferably, the defoaming agent for the oil field is characterized by comprising the following components in percentage by weight: 30 parts of polydimethylsiloxane, 20 parts of microcrystalline cellulose, 10 parts of bactericide, 5 parts of synergist, 10 parts of alcohol ether solvent and 25 parts of water.
The invention also provides a preparation method of the defoaming agent for the oil field, which is characterized by comprising the following preparation steps: weighing the raw materials according to a ratio, adding the microcrystalline cellulose into water for uniform dispersion, then sequentially adding span and polydimethylsiloxane, uniformly stirring, then adding the bactericide and the alcohol ether solvent, stirring at a rotating speed of 500-800r/min for 1-2h, standing and filtering to obtain the antifoaming agent for the oil field.
In addition, the invention also provides application of the amino modified polydimethylsiloxane and the microcrystalline cellulose in improving the defoaming performance of the defoaming agent.
The invention has the beneficial effects that:
on the basis of taking polydimethylsiloxane as a main defoaming active ingredient, a proper amount of microcrystalline cellulose is added, so that the dispersing performance of the polydimethylsiloxane can be obviously improved, the surface tension of a foam liquid film is rapidly reduced, and defoaming is rapidly realized. The advantages that the microcrystalline cellulose has small molecular size and good dispersibility in water are utilized to drive the polydimethylsiloxane to be rapidly dispersed in the system, so that the polydimethylsiloxane can easily enter a bubble film, the surface tension of the bubble film is reduced, the self-repairing function of the bubble film is lost, and an excellent defoaming effect is obtained. The span molecular structure contains hydroxyl which can form hydrogen bond with amino in the polydimethylsiloxane to help the polydimethylsiloxane to disperse and exert the effect of auxiliary dispersion, and the span is also a surfactant and can reduce the surface tension of a liquid film to a certain degree. The three components are scientifically compounded to play a role in synergy, and the defoaming performance of the defoaming agent is greatly improved. Due to the addition of the microcrystalline cellulose, the larger molecular structure of the microcrystalline cellulose can improve the heat resistance of the system, so that the defoaming agent has excellent thermal stability, and the defoaming performance is reduced to a small extent after the defoaming agent is aged for 10 days at a high temperature of 80 ℃. In addition, the raw material of the defoaming agent is wide and easy to obtain, the preparation method is simple and convenient, and the requirements of oil field operation under various conditions can be met.
Examples
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. The following specific embodiments further describe the present invention.
Example 1
The defoaming agent for the oil field comprises the following components in percentage by weight:
10 parts of polydimethylsiloxane, 8 parts of microcrystalline cellulose, 5 parts of kaempferol, 20 parts of diethylene glycol monobutyl ether and 57 parts of water; wherein the microcrystalline cellulose is prepared by acid hydrolysis of cellulosic plant material castor stalk.
The polydimethylsiloxane is amino modified polydimethylsiloxane, is obtained from Shandong Bogang Biotechnology Ltd, and has a molecular structure shown in the following chart:
。
the preparation method of the defoaming agent for the oil field comprises the following steps: weighing the raw materials according to a ratio, adding the microcrystalline cellulose into water for uniform dispersion, then sequentially adding span and polydimethylsiloxane, uniformly stirring, then adding the kason and the diethylene glycol monobutyl ether, stirring at a rotating speed of 600r/min for 1h, standing and filtering to obtain the antifoaming agent for the oil field.
The preparation method of the microcrystalline cellulose comprises the following steps: crushing castor stems into particles with the particle size of less than 4mm, adding a hydrochloric acid solution to mix with the particles, and stirring at the constant temperature of 70 ℃ for 3 hours to obtain a mixture A; stopping heating, and filtering the mixture A to obtain a jelly; adding the jelly into distilled water with the mass of 8 times that of the solid particles to obtain a mixture B, and carrying out ultrasonic treatment on the mixture B; standing and drying to obtain the microcrystalline cellulose.
Example 2
The defoaming agent for the oil field comprises the following components in percentage by weight:
polydimethylsiloxane 15, microcrystalline cellulose 12, cason 8, span 60 1, diethylene glycol monobutyl ether 25 and water 39; wherein the microcrystalline cellulose is prepared by acidolysis of cellulosic plant material castor stalk.
The polydimethylsiloxane was the same as in example 1.
The preparation method of the defoaming agent for the oil field comprises the following steps: weighing the raw materials according to a ratio, adding the microcrystalline cellulose into water for uniform dispersion, then sequentially adding span 60 and polydimethylsiloxane, uniformly stirring, then adding the kaempferol and the diethylene glycol monobutyl ether, stirring for 1h at a rotating speed of 600r/min, standing and filtering to obtain the antifoaming agent for the oil field.
The preparation method of the microcrystalline cellulose comprises the following steps: crushing castor stems into particles with the particle size of less than 4mm, adding a hydrochloric acid solution to mix with the particles, and stirring at the constant temperature of 70 ℃ for 3 hours to obtain a mixture A; stopping heating, and filtering the mixture A to obtain jelly; adding the jelly into distilled water with the mass of 8 times that of the solid particles to obtain a mixture B, and carrying out ultrasonic treatment on the mixture B; standing and drying to obtain the microcrystalline cellulose.
Example 3
The defoaming agent for the oil field comprises the following components in percentage by weight:
25 parts of polydimethylsiloxane, 16 parts of microcrystalline cellulose, 8 parts of dodecyl dimethyl benzyl ammonium chloride, 80 parts of span, 24 parts of diethylene glycol monobutyl ether and 24 parts of water; wherein the microcrystalline cellulose is prepared by acidolysis of cellulosic plant material castor stalk.
The polydimethylsiloxane was the same as in example 1.
The preparation method of the defoaming agent for the oil field comprises the following steps: weighing the raw materials according to the proportion, adding the microcrystalline cellulose into water for uniform dispersion, then sequentially adding span 80 and polydimethylsiloxane, uniformly stirring, then adding dodecyl dimethyl benzyl ammonium chloride and diethylene glycol monobutyl ether, stirring for 2 hours at the rotating speed of 700r/min, standing and filtering to obtain the antifoaming agent for the oil field.
The preparation method of the microcrystalline cellulose comprises the following steps: crushing castor stems into particles with the particle size of less than 4mm, adding a hydrochloric acid solution to mix with the particles, and stirring at the constant temperature of 70 ℃ for 3 hours to obtain a mixture A; stopping heating, and filtering the mixture A to obtain a jelly; adding the jelly into distilled water with the mass of 8 times that of the solid particles to obtain a mixture B, and carrying out ultrasonic treatment on the mixture B; standing and drying to obtain the microcrystalline cellulose.
Example 4
The defoaming agent for the oil field comprises the following components in percentage by weight:
30 parts of polydimethylsiloxane, 20 parts of microcrystalline cellulose, 10 parts of dodecyl dimethyl benzyl ammonium chloride, 80 parts of span, 10 parts of diethylene glycol monobutyl ether and 25 parts of water; wherein the microcrystalline cellulose is prepared by acidolysis of cellulosic plant material castor stalk.
The polydimethylsiloxane was the same as in example 1.
The preparation method of the defoaming agent for the oil field comprises the following steps: weighing the raw materials according to the proportion, adding the microcrystalline cellulose into water for uniform dispersion, then sequentially adding span 80 and polydimethylsiloxane, uniformly stirring, then adding dodecyl dimethyl benzyl ammonium chloride and diethylene glycol monobutyl ether, stirring for 2 hours at the rotating speed of 800r/min, standing and filtering to obtain the antifoaming agent for the oil field.
The preparation method of the microcrystalline cellulose comprises the following steps: crushing castor stems into particles with the particle size of less than 4mm, adding a hydrochloric acid solution to mix with the particles, and stirring at the constant temperature of 70 ℃ for 3 hours to obtain a mixture A; stopping heating, and filtering the mixture A to obtain a jelly; adding the jelly into distilled water with the mass of 8 times that of the solid particles to obtain a mixture B, and carrying out ultrasonic treatment on the mixture B; standing and drying to obtain the microcrystalline cellulose.
Comparative example 1
An oilfield defoamer was compared to example 3 except that the microcrystalline cellulose was 2 weight percent and the water was 38 weight percent.
Comparative example 2
An oilfield defoamer was compared to example 3 except that the microcrystalline cellulose was 5 weight percent and the water was 35 weight percent.
Comparative example 3
An oilfield defoamer was compared to example 3 except that the microcrystalline cellulose was 25 weight percent and the water was 15 weight percent.
Comparative example 4
An oilfield defoaming agent was compared with example 3 except that the microcrystalline cellulose was 30 weight percent and the water was 10 weight percent.
The defoaming rate of each example and comparative example was determined by referring to the method Q/SHCG 46-2012, and the test results are shown in table 1. Wherein the concentration of the defoaming agent is 1 percent.
TABLE 1
| Defoaming rate/%) | |
| Example 1 | 91.4 |
| Example 2 | 94.6 |
| Example 3 | 95.7 |
| Example 4 | 95.9 |
| Comparative example 1 | 75.1 |
| Comparative example 2 | 77.2 |
| Comparative example 3 | 95.5 |
| Comparative example 4 | 95.8 |
The molecular size of the microcrystalline cellulose is small, so that the microcrystalline cellulose has good dispersibility in water, a plurality of hydroxyl groups in the molecular structure of the microcrystalline cellulose can form intermolecular hydrogen bonds with amino groups in polydimethylsiloxane to drive the polydimethylsiloxane to be rapidly dispersed in a system, so that the polydimethylsiloxane can easily enter a bubble film, the surface tension of the bubble film is reduced, the bubble film is pulled to diffuse all around to finally cause the foam to break, and the polydimethylsiloxane can remarkably reduce the elasticity of the bubble film to enable the bubble film to lose the self-repairing function, so that an excellent defoaming effect is obtained.
As is clear from the results in Table 1, the antifoaming agent for oil field of the present invention has excellent antifoaming properties. Comparative examples 1-2 microcrystalline cellulose is less in amount and difficult to exert a good dispersing effect, and the defoaming rate is obviously lower than that of the examples of the invention; comparative examples 3 to 4 have improved the microcrystalline cellulose consumption, under the function of good dispersibility, the polydimethylsiloxane exerts better defoaming performance, the defoaming rate is in the same level with the example; however, because the content of the polydimethylsiloxane is not increased, the usage amount of the microcrystalline cellulose is further increased, the improvement of the defoaming performance of the defoaming agent is very limited, and the product cost is increased. Therefore, the invention obtains good balance between defoaming performance and production cost by scientifically adjusting the dosage of the components.
Comparative example 5
An oilfield defoaming agent was compared with example 3 except that the microcrystalline cellulose was 0 weight percent and the water was 40 weight percent.
Comparative example 6
Compared with example 3, the defoaming agent for oil fields is different in that span 80 is 0 weight percent and water is 27 weight percent.
Comparative example 7
An antifoaming agent for oil field use, which is different from that of example 3 in that polydimethylsiloxane is unmodified polydimethylsiloxane, i.e., amino groups are not contained in the molecular structure.
The defoaming rate of each example and comparative example was determined by referring to the method Q/SHCG 46-2012, and the test results are shown in table 2. Wherein the concentration of the defoaming agent is 1 percent.
TABLE 2
| Defoaming rate/%) | |
| Example 3 | 95.7 |
| Comparative example 5 | 68.9 |
| Comparative example 6 | 92.0 |
| Comparative example 7 | 78.6 |
According to the test results, on the basis of taking polydimethylsiloxane as a main defoaming active ingredient, a proper amount of microcrystalline cellulose is added, so that the dispersing performance of the polydimethylsiloxane can be obviously improved, the surface tension of a foam liquid film is rapidly reduced, and better defoaming performance is obtained. Comparative example 5 lacks microcrystalline cellulose on the basis of example 3, and the defoaming rate is greatly reduced, which shows that microcrystalline cellulose is really important in the defoaming agent system of the invention, and polydimethylsiloxane cannot play a good defoaming effect due to the lack of the dispersing function of the microcrystalline cellulose. The span molecular structure contains hydroxyl which can form hydrogen bond with amino in the polydimethylsiloxane to help the polydimethylsiloxane to disperse and exert the auxiliary dispersion effect, and the span is also a surfactant and can reduce the surface tension of a liquid film to a certain degree; comparative example 6 lacks the span synergist based on example 3, the defoaming rate is reduced to a certain extent compared with example 3, but the defoaming agent system still shows excellent defoaming performance because of containing a proper amount of microcrystalline cellulose. Comparative example 7 the silicone was unmodified polydimethylsiloxane, lacking amino groups capable of forming intermolecular hydrogen bonds with microcrystalline cellulose or span in the molecular structure, poor in dispersibility, and difficult to obtain a high defoaming rate.
Comparative example 8
An antifoaming agent for oil field, which is different from that of example 3 in that diethylene glycol monobutyl ether is 48 wt% and water is 0 wt%.
Comparative example 9
An antifoaming agent for oil field use, which is different from that in example 3 in that diethylene glycol monobutyl ether is 0% by weight and water is 48% by weight.
Comparative example 10
An antifoaming agent for oil field, which is different from that of example 3 in that diethylene glycol monobutyl ether is 28 wt% and water is 20 wt%.
The defoaming rate of each example and comparative example was determined by referring to the method Q/SHCG 46-2012, and the test results are shown in table 3. Wherein the concentration of the defoaming agent is 1 percent.
TABLE 3
| Defoaming rate/%) | |
| Example 3 | 95.7 |
| Comparative example 8 | 81.0 |
| Comparative example 9 | 87.5 |
| Comparative example 10 | 82.9 |
The solvent is a common component of the chemical reagent, generally has no significant influence on the product efficacy, but because the dispersing performance of the defoaming active ingredient siloxane in the siloxane defoaming system is poor, the selection of the solvent also needs to be adjusted according to the dispersing performance of the siloxane. Comparative examples 8-10 the amounts of the alcohol ether solvent and water were changed on the basis of example 3, resulting in a certain degree of change in the dispersion properties of the system. In the defoamer system, water or an alcohol ether solvent is used as a solvent alone, so that higher defoaming rate is difficult to obtain.
The samples of examples 1 to 4 and comparative examples 5 and 7 were left at 80 ℃ for 10 days, and the defoaming ratio after each sample was determined with reference to the method of Q/SHCG 46-2012, and the test results are shown in Table 4. Wherein the concentration of the defoaming agent is 1 percent.
TABLE 4
| Defoaming ratio before standing/%) | Defoaming percentage/% after leaving for 10 days | |
| Example 1 | 91.4 | 90.5 |
| Example 2 | 94.6 | 94.0 |
| Example 3 | 95.7 | 94.9 |
| Example 4 | 95.9 | 95.1 |
| Comparative example 5 | 68.9 | 59.4 |
| Comparative example 7 | 78.6 | 70.7 |
As can be seen from the results in Table 4, comparative example 5 contains no microcrystalline cellulose, has a small proportion of macromolecular substances in the system, and has poor thermal stability; comparative example 7 siloxane is unmodified polydimethylsiloxane, cannot form intermolecular hydrogen bond with microcrystalline cellulose and span, is easily heated to cause further reduction of dispersion performance, and also has obviously reduced defoaming rate after high-temperature accelerated storage. Due to the addition of microcrystalline cellulose, the larger molecular structure of the defoaming agent can improve the heat resistance of the system, so that the defoaming agent has excellent thermal stability, is aged at the high temperature of 80 ℃ for 10 days, has small defoaming performance reduction range, and can meet the actual operation requirement under the high-temperature condition.
The degassing tests were carried out for each example and comparative example by adding a 200mL sample of oil with foam to a container bottle, then placing the bottle in a water bath at 60 ℃, adding the sample of defoamer to be tested, and recording the time taken for the foam to disappear completely, the shorter the time, the better the defoaming effect, the results are shown in table 5.
TABLE 5
| Addition of antifoamAmount (mg/L) | Complete defoaming time | |
| Blank group | 0 | 11 minutes 35 seconds |
| Example 1 | 60 | 2 minutes and 48 seconds |
| Example 2 | 60 | 2 minutes 23 seconds |
| Example 3 | 60 | 2 minutes and 9 seconds |
| Example 4 | 60 | 1 minute 58 seconds |
| Comparative example 1 | 60 | 6 minutes and 17 seconds |
| Comparative example 2 | 60 | 6 minutes and 51 seconds |
| Comparative example 3 | 60 | 2 minutes and 17 seconds |
| Comparative example 4 | 60 | 2 minutes and 2 seconds |
| Comparative example 5 | 60 | 6 minutes 32 seconds |
| Comparative example 6 | 60 | 3 minutes and 5 seconds |
| Comparative example 7 | 60 | 5 minutes and 54 seconds |
| Comparative example 8 | 60 | 4 minutes and 46 seconds |
| Comparative example 9 | 60 | 4 minutes and 20 seconds |
| Comparative example 10 | 60 | 4 minutes and 39 seconds |
As can be seen from the results in Table 5, the defoaming agent of the present invention has excellent degassing and defoaming effects, and can completely eliminate foam within about 2 minutes in the test, which is superior to each comparative example.
Therefore, the defoaming agent disclosed by the invention is prepared by compounding polydimethylsiloxane, microcrystalline cellulose, span and the like according to a certain proportion, the components play a synergistic interaction role, the defoaming is rapid, the defoaming rate is high, the thermal stability of the defoaming agent is good, the defoaming performance is reduced slightly after accelerated storage, and the production operation requirements of oil fields are met.
The above-described embodiments are preferred implementations of the present invention, and the present invention can be implemented in other ways without departing from the spirit of the present invention.
Claims (6)
1. The defoaming agent for the oil field is characterized by comprising the following components in percentage by weight: 10-30% of polydimethylsiloxane, 8-20% of microcrystalline cellulose, 5-10% of bactericide, 0-5% of synergist and the balance of solvent; the microcrystalline cellulose is prepared by acidolysis of a cellulose plant raw material, the solvent comprises water and an alcohol ether solvent, and the mass ratio of the water to the alcohol ether solvent is 1-3:1; when the weight percentage of the polydimethylsiloxane is more than 10%, the weight percentage of the synergist is not 0%, and the synergist is span 60 or span 80; the polydimethylsiloxane is amino-modified polydimethylsiloxane, and the molecular structure of the polydimethylsiloxane is provided with one or more than one amino; the preparation method of the microcrystalline cellulose comprises the following steps: crushing castor stems into particles with the particle size of less than 4mm, adding a hydrochloric acid solution to mix with the particles, and stirring at the constant temperature of 70 ℃ for 3 hours to obtain a mixture A; stopping heating, and filtering the mixture A to obtain a jelly; adding the jelly into distilled water with the mass of 8 times that of the particles to obtain a mixture B, and carrying out ultrasonic treatment on the mixture B; standing and drying to obtain the microcrystalline cellulose.
2. The oilfield antifoaming agent of claim 1, wherein the biocide is one or more of cason and a cationic surfactant, and the cationic surfactant is a quaternary ammonium salt.
3. The antifoaming agent for oil field according to claim 1, wherein the alcohol ether solvent is one or more selected from the group consisting of diethylene glycol monobutyl ether, propylene glycol butyl ether, and diethylene glycol hexyl ether.
4. The antifoaming agent for oil fields according to claim 1, characterized by comprising the following components in percentage by weight: 25% of polydimethylsiloxane, 16% of microcrystalline cellulose, 8% of bactericide, 3% of synergist, 24% of alcohol ether solvent and 24% of water.
5. The antifoaming agent for oil fields according to claim 1, characterized by comprising the following components in percentage by weight: 30% of polydimethylsiloxane, 20% of microcrystalline cellulose, 10% of bactericide, 5% of synergist, 10% of alcohol ether solvent and 25% of water.
6. The preparation method of the antifoaming agent for oil fields according to any one of claims 1 to 5, characterized by comprising the following preparation steps: weighing the raw materials according to a ratio, adding the microcrystalline cellulose into water for uniform dispersion, then sequentially adding the synergist and the polydimethylsiloxane, stirring uniformly, then adding the bactericide and the alcohol ether solvent, stirring at a rotating speed of 500-800r/min for 1-2h, standing and filtering to obtain the antifoaming agent for the oil field.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101298503A (en) * | 2008-06-24 | 2008-11-05 | 四川石油管理局地质勘探开发研究院 | Instant dissolution method of sodium carboxymethylcellulose in organosilicon foam killer preparation process |
| CN108144327A (en) * | 2018-01-02 | 2018-06-12 | 山东禹王生态食业有限公司 | A kind of high-carbon alcohols non-silicon defoaming agent and preparation method thereof |
| CN114350335A (en) * | 2022-03-21 | 2022-04-15 | 胜利油田新海兴达实业集团有限责任公司 | Foaming agent for oil field and preparation method thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6610752B1 (en) * | 1999-10-09 | 2003-08-26 | Cognis Deutschland Gmbh | Defoamer granules and processes for producing the same |
| CN102048690A (en) * | 2011-01-14 | 2011-05-11 | 四川健能制药有限公司 | Dimeticone emulsion and preparation method thereof |
| JP5804565B2 (en) * | 2012-06-29 | 2015-11-04 | 信越化学工業株式会社 | Antifoam composition |
-
2022
- 2022-08-01 CN CN202210913496.6A patent/CN114949940B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101298503A (en) * | 2008-06-24 | 2008-11-05 | 四川石油管理局地质勘探开发研究院 | Instant dissolution method of sodium carboxymethylcellulose in organosilicon foam killer preparation process |
| CN108144327A (en) * | 2018-01-02 | 2018-06-12 | 山东禹王生态食业有限公司 | A kind of high-carbon alcohols non-silicon defoaming agent and preparation method thereof |
| CN114350335A (en) * | 2022-03-21 | 2022-04-15 | 胜利油田新海兴达实业集团有限责任公司 | Foaming agent for oil field and preparation method thereof |
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