Clay stabilizer with good anti-swelling effect and preparation method thereof
By preparing a clay stabilizer containing quaternary ammonium salt cations and a benzene ring structure, the problems of easy decomposition of clay stabilizers at high temperatures and poor erosion resistance are solved, good anti-swelling effect and temperature resistance are achieved, and oil extraction efficiency is improved.
Patent Information
- Application Number
- CN202510825077.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-19
- Publication Date
- 2025-10-10
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Existing clay stabilizers are easily decomposed at high temperatures, have poor erosion resistance, and cannot effectively prevent clay expansion, thus affecting oil extraction efficiency.
The clay stabilizer is prepared by polymerization of tertiary amine compounds and dihalogenated aromatic hydrocarbons to form an adsorption film containing quaternary ammonium salt cations, which prevents the expansion of clay particles and improves the temperature resistance through the benzene ring structure.
It provides good anti-swelling effect and temperature resistance, can effectively inhibit clay hydration expansion at high temperature, reduce costs and improve oil production efficiency.
Smart Images
Figure BDA0005457827700000091 
Figure BDA0005457827700000092 
Figure BDA0005457827700000101
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of oil field development, and particularly relates to a clay stabilizer with good anti-swelling effect and a preparation method thereof. Background Art
[0002] After years of development in oil recovery technology, waterflooding has become a highly common and effective method for enhancing oil recovery. During waterflooding, a series of issues caused by clay minerals within reservoir formations have become increasingly prominent, becoming a key factor restricting oil recovery efficiency and recovery rate increases. Clay minerals in formations, such as montmorillonite, illite, and kaolinite, possess unique crystal structures and chemical properties, often exhibiting a pronounced affinity for water. When injected into the reservoir formation, these clay minerals rapidly interact with the water, absorbing large amounts of water and causing swelling. This swelling effect is highly destructive, directly altering the formation's pore structure. Previously unobstructed pore channels become narrowed or even completely blocked. This blockage of formation pores severely impacts the flow of oil through the formation, hindering its smooth flow to production wells and ultimately leading to a significant decrease in oil recovery.
[0003] Clay stabilizers are widely used in oil production to minimize the negative impact of clay swelling. Inorganic clay stabilizers are prone to cation exchange in solution, resulting in poor stability and long-term effectiveness, an inability to form multi-point adsorption, and poor erosion resistance. Inorganic clay stabilizers can also harm stratum microbial communities, causing soil compaction and significant environmental damage. As oil reservoirs continue to develop and storage temperatures rise, cationic surfactant-based clay stabilizers decompose at high temperatures, losing their ability to stabilize the clay.
[0004] Therefore, providing a clay stabilizer with good temperature resistance and good anti-swelling effect is a key issue to be solved in this field. Summary of the Invention
[0005] In order to solve the problems of poor temperature resistance of existing clay stabilizers and easy damage to the formation when added in large amounts, the present invention provides a clay stabilizer with good anti-swelling effect and a preparation method thereof.
[0006] Specifically, the technical solution of the present invention includes the following contents:
[0007] A method for preparing a clay stabilizer with good anti-swelling effect, the preparation method comprising the following steps:
[0008] After ultrasonically dispersing the tertiary amine compound in a solvent, dihalogenated aromatic hydrocarbon and an alkaline catalyst are added and stirred and mixed, and the mixture is heated to 70-80° C. in an inert gas protection environment. After stirring and polymerization, the mixture is purified by reduced pressure distillation to obtain a polymer. The polymer is washed and vacuum dried to obtain the clay stabilizer with good anti-swelling effect.
[0009] Furthermore, the preparation method of the tertiary amine compound comprises the following steps:
[0010] The aminophenol-containing compound is dispersed in a solvent through ultrasonic treatment, and after adding alkylene oxide, the mixture is stirred and reacted in an environment of 70-80° C. for 3-4 hours to obtain an intermediate product; the alcoholamine compound and the intermediate product are mixed in an ultrasonic environment for 5-10 minutes, and then a catalyst is added. In an inert gas protection environment, the temperature is raised to 110-120° C., the mixture is stirred and reacted for 4-5 hours, and then the mixture is subjected to reduced pressure distillation to obtain the tertiary amine compound.
[0011] Furthermore, the aminophenol-containing compound is levodopa.
[0012] Furthermore, the alkylene oxide is propylene oxide.
[0013] Furthermore, the weight ratio of the aminophenol-containing compound to the alkylene oxide is 1:0.6-0.8.
[0014] Furthermore, the ultrasonic treatment includes an ultrasonic power of 80 to 100 W and an ultrasonic time of 3 to 5 minutes.
[0015] Furthermore, the alcoholamine compound is N-methyldiethanolamine.
[0016] Furthermore, the weight ratio of the alcoholamine compound to the intermediate product is 1:7-10.
[0017] Furthermore, the amount of the catalyst used is 1% of the total weight of the alcoholamine compound and the intermediate product.
[0018] Furthermore, the catalyst is p-toluenesulfonic acid.
[0019] Furthermore, the ultrasonic environment includes an ultrasonic power of 80-100W and an ultrasonic temperature of 35-45°C.
[0020] Furthermore, the inert gas includes nitrogen or argon.
[0021] Furthermore, the solvent is prepared by mixing anhydrous ethanol and deionized water in a weight ratio of 1:1.
[0022] Furthermore, the ultrasonic dispersion includes an ultrasonic power of 60 to 90 W and an ultrasonic time of 5 to 10 minutes.
[0023] Furthermore, the dihalogenated aromatic hydrocarbon is benzyl dichloride.
[0024] Furthermore, the weight ratio of the tertiary amine compound to the dihalogenated aromatic hydrocarbon is 1:0.5-0.8.
[0025] Furthermore, the amount of the alkaline catalyst used is 0.5-1% of the total weight of the tertiary amine compound and the dihalogenated aromatic hydrocarbon compound.
[0026] Furthermore, the alkaline catalyst includes triethylamine, diethylamine or triethylenediamine.
[0027] Furthermore, the weight ratio of the tertiary amine compound to the solvent is 1:10.
[0028] Furthermore, the stirring and mixing includes a stirring speed of 300 to 500 rpm and a stirring time of 15 to 30 minutes.
[0029] Furthermore, the stirring polymerization includes a stirring speed of 500 to 700 rpm and a stirring time of 10 to 12 hours.
[0030] Furthermore, the vacuum drying includes a drying temperature of 50 to 60° C. and a drying time of 20 to 24 hours.
[0031] Compared with the prior art, the present invention has the following beneficial effects:
[0032] (1) The present invention obtains an intermediate product containing an ether bond by a ring-opening addition reaction between the amino group in the aminophenol compound and the alkylene oxide in the alkylene oxide, and then the intermediate product undergoes an esterification reaction with an alcoholamine compound to obtain a tertiary amine compound; a clay stabilizer with good anti-swelling effect is prepared by a substitution polymerization reaction using a dihalogenated aromatic hydrocarbon as a cross-linking agent and a tertiary amine compound as a raw material. The clay stabilizer provided by the present invention contains a large amount of quaternary ammonium salt cations, which can enter between clay sheets, neutralize the negative charge of the clay surface, form multi-point adsorption with clay particles, and form an adsorption film on the surface of the clay particles to prevent the clay particles from contacting with water molecules and causing the clay particles to expand and migrate; the clay stabilizer provided by the present invention contains rich side chains, has strong scour resistance, and can effectively inhibit the hydration, expansion and migration of formation clay during water injection.
[0033] (2) The clay stabilizer prepared by the present invention contains a large amount of benzene ring structures, which effectively prevents water molecules from entering between clay sheets and has good temperature resistance.
[0034] (3) The clay stabilizer provided by the present invention contains catechol groups and hydroxyl groups, which can be adsorbed on the clay surface through hydrogen bonding, preventing water molecules from continuing to enter the area between the clay sheets, bridging the clay sheets, and inhibiting clay expansion; the clay stabilizer provided by the present invention contains a large amount of quaternary ammonium cations, which has a good anti-swelling effect. At a lower concentration, a better anti-swelling effect can be achieved, which can significantly reduce costs. DETAILED DESCRIPTION
[0035] The technical solutions of the present application will be described clearly and completely below through embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.
[0036] Unless otherwise specified, the raw materials and reagents used in the present application below are commercially available or can be prepared by known methods.
[0037] Preparation Example 1:
[0038] Preparation of the solvent, comprising the following steps:
[0039] 500 parts by weight of anhydrous ethanol and 500 parts by weight of deionized water were mixed and stirred at a speed of 300 rpm for 5 min to prepare the solvent.
[0040] Preparation Example 2:
[0041] Preparation of the tertiary amine compound, comprising the following steps:
[0042] 10 parts by weight of levodopa was dispersed in 50 parts by weight of the solvent prepared in Preparation Example 1 by ultrasonic treatment at a power of 80 W for 3 min, 6 parts by weight of propylene oxide was added, and the reaction was stirred at a speed of 500 rpm at 70°C for 3 h to obtain an intermediate product; 1 part by weight of N-methyldiethanolamine and 7 parts by weight of the intermediate product were mixed by ultrasonic treatment at a power of 80 W and a temperature of 35°C for 10 min, then 0.08 parts by weight of p-toluenesulfonic acid was added, and the reaction was stirred at a speed of 400 rpm at 110°C under nitrogen protection for 4 h, and then distilled under reduced pressure to obtain the tertiary amine compound.
[0043] Preparation Example 3:
[0044] Preparation of the tertiary amine compound, comprising the following steps:
[0045] 10 parts by weight of levodopa was dispersed in 50 parts by weight of the solvent prepared in Preparation Example 1 by ultrasonic treatment at a power of 90 W for 4 min, 7 parts by weight of propylene oxide was added, and the reaction was stirred at a speed of 550 rpm at 73°C for 3.2 h to obtain an intermediate product; 1 part by weight of N-methyldiethanolamine and 8 parts by weight of the intermediate product were mixed by ultrasonic treatment at a power of 85 W and a temperature of 40°C for 12 min, then 0.09 parts by weight of p-toluenesulfonic acid was added, and the reaction was stirred at a speed of 450 rpm at 113°C under argon protection for 4.3 h, and then distilled under reduced pressure to obtain the tertiary amine compound.
[0046] Preparation Example 4: Preparation of the tertiary amine compound, comprising the following steps:
[0047] 10 parts by weight of levodopa was dispersed in 50 parts by weight of the solvent prepared in Preparation Example 1 by ultrasonic treatment at a power of 95 W for 3 min, 7 parts by weight of propylene oxide was added, and the reaction was stirred at 650 rpm for 3.8 h in an environment at 78°C to obtain an intermediate product; 1 part by weight of N-methyldiethanolamine and 9 parts by weight of the intermediate product were mixed by ultrasonic treatment at a power of 95 W and in an environment at 40°C for 14 min, 0.1 part by weight of p-toluenesulfonic acid was added, the reaction was stirred at 500 rpm for 4 h in an environment at 110°C under nitrogen protection, and the tertiary amine compound was prepared by distillation under reduced pressure.
[0048] Preparation Example 5:
[0049] Preparation of the tertiary amine compound, comprising the following steps:
[0050] 10 parts by weight of levodopa was dispersed in 50 parts by weight of the solvent prepared in Preparation Example 1 by ultrasonic treatment at a power of 100 W for 5 min, 8 parts by weight of propylene oxide was added, and the reaction was stirred at 700 rpm for 4 h in an environment at 80°C to obtain an intermediate product; 1 part by weight of N-methyldiethanolamine and 10 parts by weight of the intermediate product were mixed by ultrasonic treatment at a power of 100 W and in an environment at 45°C for 15 min, 0.11 part by weight of p-toluenesulfonic acid was added, the reaction was stirred at 600 rpm for 5 h in an environment at 120°C under nitrogen protection, and the tertiary amine compound was prepared by distillation under reduced pressure.
[0051] Preparation Example 6:
[0052] Preparation of the tertiary amine compound, comprising the following steps:
[0053] 10 parts by weight of levodopa was dispersed in 50 parts by weight of the solvent prepared in Preparation Example 1 by ultrasonic treatment at a power of 100 W for 5 min, 8 parts by weight of propylene oxide was added, and the reaction was stirred at 700 rpm for 4 h in an environment at 80°C to obtain an intermediate product; 1 part by weight of N-methyldiethanolamine and 10 parts by weight of the intermediate product were mixed by ultrasonic treatment at a power of 100 W and in an environment at 45°C for 15 min, 0.11 part by weight of p-toluenesulfonic acid was added, the reaction was stirred at 600 rpm for 5 h in an environment at 120°C under nitrogen protection, and the tertiary amine compound was prepared by distillation under reduced pressure.
[0054] Example 1:
[0055] Preparation of the clay stabilizer with good anti-swelling effect, comprising the following steps:
[0056] 10 parts by weight of the tertiary amine compound prepared in Preparation Example 2 was added to 100 parts by weight of the solvent prepared in Example 1 and ultrasonically dispersed at a power of 60 W for 5 minutes. Then, 5 parts by weight of biphenyl dichloride and 0.075 parts by weight of triethylamine were added and stirred at a speed of 300 rpm for 15 minutes to mix. The temperature was raised to 70°C in a nitrogen protection environment and stirred at a speed of 500 rpm for polymerization for 10 hours. After the polymerization reaction, the solvent was removed by distillation under reduced pressure, and the polymer was purified by recrystallization with anhydrous ethanol to obtain a polymer. The polymer was washed with acetone and then vacuum dried at 50°C for 20 hours to obtain a clay stabilizer with good anti-swelling effect.
[0057] Example 2:
[0058] The preparation of a clay stabilizer with good anti-swelling effect comprises the following steps:
[0059] 10 parts by weight of the tertiary amine compound prepared in Preparation Example 3 was added to 100 parts by weight of the solvent prepared in Example 1 and ultrasonically dispersed at a power of 70 W for 6 minutes. Then, 6 parts by weight of biphenyl dichloride and 0.128 parts by weight of diethylamine were added and stirred at a speed of 350 rpm for 20 minutes to mix. The temperature was raised to 73°C in an argon protection environment and stirred at a speed of 550 rpm for polymerization for 11 hours. After the polymerization reaction, the solvent was removed by distillation under reduced pressure, and the polymer was purified by recrystallization with anhydrous ethanol to obtain a polymer. The polymer was washed with acetone and then vacuum dried at 53°C for 21 hours to obtain a clay stabilizer with good anti-swelling effect.
[0060] Example 3:
[0061] The preparation of a clay stabilizer with good anti-swelling effect comprises the following steps:
[0062] 10 parts by weight of the tertiary amine compound prepared in Preparation Example 4 was added to 100 parts by weight of the solvent prepared in Example 1 and ultrasonically dispersed at a power of 80 W for 8 minutes. Then, 7 parts by weight of biphenyl dichloride and 0.119 parts by weight of triethylenediamine were added and stirred at a speed of 450 rpm for 25 minutes to mix. The temperature was raised to 76°C in an argon protection environment and stirred at a speed of 650 rpm for 11 hours. After the polymerization reaction, the solvent was removed by distillation under reduced pressure, and the polymer was purified by recrystallization with anhydrous ethanol to obtain a polymer. The polymer was washed with acetone and then vacuum dried at 57°C for 22 hours to obtain a clay stabilizer with good anti-swelling effect.
[0063] Example 4:
[0064] The preparation of a clay stabilizer with good anti-swelling effect comprises the following steps:
[0065] 10 parts by weight of the tertiary amine compound prepared in Preparation Example 5 was added to 100 parts by weight of the solvent prepared in Example 1 and ultrasonically dispersed at a power of 90 W for 10 minutes. Then, 8 parts by weight of biphenyl dichloride and 0.18 parts by weight of diethylamine were added and stirred at a speed of 500 rpm for 30 minutes to mix. The temperature was raised to 80°C in a nitrogen protection environment and stirred at a speed of 700 rpm for polymerization for 12 hours. After the polymerization reaction, the solvent was removed by distillation under reduced pressure, and the polymer was purified by recrystallization with anhydrous ethanol to obtain a polymer. The polymer was washed with acetone and then vacuum dried at 60°C for 24 hours to obtain a clay stabilizer with good anti-swelling effect.
[0066] Comparative Example 1:
[0067] The preparation of a clay stabilizer with good anti-swelling effect comprises the following steps:
[0068] 10 parts by weight of the tertiary amine compound prepared in Preparation Example 6 was added to 100 parts by weight of the solvent prepared in Example 1 and ultrasonically dispersed at a power of 90 W for 10 minutes. Then, 8 parts by weight of biphenyl dichloride and 0.18 parts by weight of diethylamine were added and stirred at a speed of 500 rpm for 30 minutes to mix. The temperature was raised to 80°C in a nitrogen protection environment and stirred at a speed of 700 rpm for polymerization for 12 hours. After the polymerization reaction, the solvent was removed by distillation under reduced pressure, and the polymer was purified by recrystallization with anhydrous ethanol to obtain a polymer. The polymer was washed with acetone and then vacuum dried at 60°C for 24 hours to obtain a clay stabilizer with good anti-swelling effect.
[0069] Comparative Example 2:
[0070] The preparation of a clay stabilizer with good anti-swelling effect comprises the following steps:
[0071] 10 parts by weight of the tertiary amine compound prepared in Preparation Example 5 was added to 100 parts by weight of the solvent prepared in Example 1 and ultrasonically dispersed at a power of 90 W for 10 minutes. Then, 8 parts by weight of 1,10-dichlorodecane and 0.18 parts by weight of diethylamine were added and stirred at a speed of 500 rpm for 30 minutes to mix. The temperature was raised to 80°C in a nitrogen protection environment and stirred at a speed of 700 rpm for polymerization for 12 hours. After the polymerization reaction, the solvent was removed by distillation under reduced pressure, and the polymer was purified by recrystallization with anhydrous ethanol to obtain a polymer. The polymer was washed with acetone and then vacuum dried at 60°C for 24 hours to obtain a clay stabilizer with good anti-swelling effect.
[0072] Comparative Example 3:
[0073] The preparation of a clay stabilizer with good anti-swelling effect comprises the following steps:
[0074] 10 parts by weight of the intermediate product obtained in Preparation Example 5 was added to 100 parts by weight of the solvent obtained in Example 1 and ultrasonically dispersed at a power of 90 W for 10 minutes. Then, 8 parts by weight of biphenyl dichloride and 0.18 parts by weight of diethylamine were added and stirred at a speed of 500 rpm for 30 minutes to mix. The temperature was raised to 80°C in a nitrogen protection environment and stirred at a speed of 700 rpm for 12 hours. After the polymerization reaction, the solvent was removed by distillation under reduced pressure, and the polymer was purified by recrystallization with anhydrous ethanol to obtain a polymer. The polymer was washed with acetone and then vacuum dried at 60°C for 24 hours to obtain a clay stabilizer with good anti-swelling effect.
[0075] Test Example 1: Anti-swelling effect test
[0076] The clay stabilizers prepared in Examples 1 to 4, the clay stabilizers prepared in Comparative Examples 1 to 3, and a commercially available clay stabilizer were colorimetrically measured, and the anti-swelling properties of the above products were evaluated using room temperature anti-swelling rate and high temperature anti-swelling rate tests. The specific test included the following steps. The test results are shown in Table 1.
[0077] The clay stabilizers prepared in Examples 1 to 4, the clay stabilizers prepared in Comparative Examples 1 to 3, and commercially available clay stabilizers were added with water to prepare clay stabilizer sample aqueous solutions with a mass concentration of 0.5%. 0.5 g of bentonite was weighed and placed in 8 10 mL centrifuge tubes. 10 mL of the above clay stabilizer sample aqueous solution was added to each tube, and the mixture was thoroughly shaken. The tubes were allowed to stand at room temperature for 2 hours, then placed in a centrifuge and centrifuged at 1500 rpm for 15 minutes to obtain the volume V1 of the expanded bentonite. 10 mL of water and kerosene were used to replace the clay stabilizer sample aqueous solution, respectively, and the expanded volumes V2 and V0 of the bentonite in water and kerosene were measured. The calculation formula is as follows:
[0078]
[0079] Where: η—anti-swelling rate, %;
[0080] V0—expansion volume of bentonite in kerosene, mL;
[0081] V1—swelling volume of bentonite in clay stabilizer sample aqueous solution, mL;
[0082] V2—expansion volume of bentonite in water, mL;
[0083] Anti-swelling rate test after aging at 300°C: Weigh 8 portions of 3.00g bentonite and place them in a high-temperature, high-pressure sealed reactor. Add 60mL of a 0.5% mass concentration of clay stabilizer sample aqueous solution and shake thoroughly to obtain a clay stabilizer mixture. Place the mixture in an oven at 300±2°C and let it stand for 24 hours. Cool it naturally to room temperature. Transfer all the clay stabilizer mixture in the high-temperature, high-pressure sealed reactor into a 100mL beaker, shake thoroughly, quickly take out 10mL and add it to a centrifuge tube. Centrifuge at a speed of 1500r / min for 15 minutes to obtain the expanded volume V1 of the bentonite. The high-temperature anti-swelling rate calculation formula is as follows:
[0084]
[0085] Where: F—high temperature anti-swelling rate, %;
[0086] V0—expansion volume of bentonite in kerosene, mL;
[0087] V1—swelling volume of bentonite in clay stabilizer sample aqueous solution, mL;
[0088] V2—expansion volume of bentonite in water, mL.
[0089] Table 1. Anti-swelling effect test of examples, comparative examples and commercially available samples
[0090]
[0091] The test results in Table 1 show that the clay stabilizers prepared in Examples 1 to 4 have good anti-expansion performance and high temperature resistance, and their anti-expansion rates are all over 80%. In particular, the anti-expansion rate of Example 4 can reach 98.45%, and the anti-expansion rate can still reach 96.12% after high-temperature aging at 300°C. However, the anti-expansion rates of the clay stabilizers prepared in Comparative Examples 1 to 3 are relatively low, indicating that the solutions in the comparative examples cannot meet the technical requirements of the present application.
[0092] Test Example 2: Water wash resistance test
[0093] After the high temperature aging anti-swelling rate test, pour out the supernatant in the centrifuge tube and add water to 10mL. Stir thoroughly and let it stand for 2 hours. Centrifuge it at 1500r / min for 15 minutes to obtain the final volume of bentonite V. ' 1. The test results are shown in Table 2. The calculation formula for water wash resistance is as follows:
[0094]
[0095] Where: N—water washability, %;
[0096] V0—expansion volume of bentonite in kerosene, mL;
[0097] V ' 1—expansion volume of bentonite after washing, mL;
[0098] V2—expansion volume of bentonite in water, mL.
[0099] Table 2. Water wash resistance test of examples, comparative examples and commercially available samples
[0100] % wash resistance Example 1 95.75 Example 2 96.20 Example 3 97.61 Example 4 99.72 Comparative Example 1 83.56 Comparative Example 2 81.43 Comparative Example 3 78.71 Commercial sample 83.12
[0101] It can be observed from the test results in Table 2 that the clay stabilizers prepared in Examples 1 to 3 have good water washability. The water washability of the clay stabilizers provided by the present invention after being kept at a constant temperature of 300°C for 24 hours is higher than 85%. However, the water washability of the clay stabilizers prepared in Comparative Examples 1 to 3 and the commercially available samples is inferior to that of the clay stabilizer provided by the present invention.
[0102] The embodiments described above provide a detailed description of the technical solutions and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications fall within the scope of the present invention as claimed.
Claims
1. A method for preparing a clay stabilizer with good anti-swelling effect, characterized in that: The preparation method comprises the following steps: After ultrasonically dispersing the tertiary amine compound in a solvent, dihalogenated aromatic hydrocarbon and an alkaline catalyst are added and stirred and mixed, and the mixture is heated to 70-80° C. in an inert gas protection environment. After stirring and polymerization, the mixture is purified by reduced pressure distillation to obtain a polymer. The polymer is washed and vacuum dried to obtain the clay stabilizer with good anti-swelling effect.
2. A clay stabilizer with good anti-swelling effect as claimed in claim 1, characterized in that: The preparation method of the tertiary amine compound comprises the following steps: The aminophenol-containing compound is dispersed in a solvent through ultrasonic treatment, and after adding alkylene oxide, the mixture is stirred and reacted in an environment of 70-80° C. for 3-4 hours to obtain an intermediate product; the alcoholamine compound and the intermediate product are mixed in an ultrasonic environment for 5-10 minutes, and then a catalyst is added. In an inert gas protection environment, the temperature is raised to 110-120° C., the mixture is stirred and reacted for 4-5 hours, and then the mixture is subjected to reduced pressure distillation to obtain the tertiary amine compound.
3. A clay stabilizer with good anti-swelling effect as claimed in claim 2, characterized in that: The aminophenol-containing compound is levodopa.
4. A clay stabilizer with good anti-swelling effect as claimed in claim 2, characterized in that: The alkylene oxide is propylene oxide.
5. The clay stabilizer with good anti-swelling effect according to claim 2, characterized in that: The weight ratio of the aminophenol-containing compound to the alkylene oxide is 1:0.6-0.
8.
6. A clay stabilizer with good anti-swelling effect as claimed in claim 2, characterized in that: The alcoholamine compound is N-methyldiethanolamine.
7. The method for preparing a clay stabilizer with good anti-swelling effect according to claim 2, characterized in that: The weight ratio of the alcoholamine compound to the intermediate product is 1:7-10.
8. The method for preparing a clay stabilizer with good anti-swelling effect according to claim 2, wherein: The amount of the catalyst used is 1% of the total weight of the alcoholamine compound and the intermediate product.
9. The method for preparing a clay stabilizer with good anti-swelling effect according to claim 1, characterized in that: The dihalogenated aromatic hydrocarbon is benzyl phthalate.
10. The method for preparing a clay stabilizer with good anti-swelling effect according to claim 1, characterized in that: The weight ratio of the tertiary amine compound to the dihalogenated aromatic hydrocarbon is 1:0.5-0.8.