Bio-based active crude oil sludge recovery treatment agent and preparation method thereof

Abstract

The invention discloses a bio-based active crude oil sludge recovery treatment agent and a preparation method thereof, and relates to the technical field of oil sludge treatment.The recovery treatment agent is prepared from, by mass, 15%-25% of a biological surfactant, 5%-15% of a sulfate type double hydrocarbon chain surfactant, 1%-3% of nano silicon dioxide, 2%-4% of a flocculating agent, 8%-13% of a biological auxiliary agent and the balance water; wherein the biological surfactant is one or a mixture of more of rhamnolipid, trehalose lipid, sophorolipid and arabinoglucuronic acid xylan; the sulfate type double hydrocarbon chain surfactant is prepared from the following raw materials in parts by weight: 10 to 20 parts of diglyceride, 38 to 76 parts of 1, 2-dichloroethane, 7.2 to 14.5 parts of chlorosulfonic acid and 0.1 to 0.2 part of deionized water. The crude oil sludge recovery treatment agent has the advantages of excellent emulsifying property, good biodegradability, good environmental friendliness and high crude oil recovery rate.

Description

Technical Field

[0001] The present application relates to the field of oil sludge treatment technology, and in particular to a bio-based active crude oil sludge recovery treatment agent and a preparation method thereof. Background Art

[0002] It is estimated that there are 9 billion tons of waste oily mud and sand waste liquid contaminated by heavy oil in the world, and it is increasing every year. The sources of oily mud and sand mixtures are mainly caused by leakage from crude oil exploration and production, crude oil drilling fluids, oil pipelines, refineries, crude oil storage tank bottoms, petrochemical plants, crude oil terminals, tankers, merchant ships, etc. There are a large number of renewable energy sources with high potential value in oily sludge, such as petroleum hydrocarbons and water. In addition, with the continuous updating of ecological and environmental development models such as environmental protection and sustainability, the use of oily sludge as a renewable resource for energy recovery is an appropriate solution to effectively manage the increasing production of oily sludge.

[0003] Traditional treatment methods basically use chemical surfactants for treatment, which has the advantage of low cost. However, it is harmful to the environment, difficult to biodegrade, and has a large environmental pollution, so its use is restricted. The biosurfactant cleaning technology can not only separate most petroleum substances from oily sludge in a short time, but also has the characteristics of good biocompatibility, biodegradability, low toxicity, environmental friendliness, diverse structures, and wide application, and has been widely used. However, the use of a single biosurfactant still has the problems of low efficiency and poor effect. Therefore, it is still necessary to develop new methods for crude oil sludge recovery. Summary of the invention

[0004] In order to improve the problem of poor effect of a single biosurfactant, the present application provides a bio-based active crude oil sludge recovery treatment agent and a preparation method thereof.

[0005] The present application provides a bio-based active crude oil sludge recovery treatment agent, which adopts the following technical solution: A bio-based active crude oil sludge recovery and treatment agent, the raw materials of which include, by mass percentage, 15-25% of biosurfactant, 5-15% of sulfate type double hydrocarbon chain surfactant, 1-3% of nano silicon dioxide, 2-4% of flocculant, 8-13% of biological additive, and the balance is water.

[0006] By adopting the above technical scheme, sulfate-type dihydrocarbon chain surfactants and biosurfactants are compounded as the main raw materials of crude oil sludge recovery treatment agents. Sulfate-type dihydrocarbon chain surfactants have lower critical micelle concentrations and better emulsification properties. They also have excellent biodegradability and are environmentally friendly. Compounding them with biosurfactants can effectively enhance the recovery efficiency of crude oil sludge. Adding nano-silicon dioxide to the compounded surfactant system can produce a synergistic effect, which can significantly improve the efficiency of recovering oil from oily sludge.

[0007] Preferably, the raw materials include, by mass percentage, 20% biosurfactant, 10% sulfate-type double hydrocarbon chain surfactant, 2% nano-silica, 3% flocculant, 11% bio-additive, and the balance is water.

[0008] Preferably, the biosurfactant is a mixture of one or more of rhamnolipid, trehalolipid, sophorolipid and arabinoglucuronic acid xylan.

[0009] Preferably, the biosurfactant is a mixture of rhamnolipid or sophorolipid or trehalolipid and arabinoglucuronic acid xylan.

[0010] By adopting the above technical scheme, rhamnolipids, sophorolipids and trehalolipids have excellent emulsifying properties, arabinoglucuronic acid xylan can recover most of the straight-chain hydrocarbons, and it has high detergency and unique characteristics such as good foaming property, emulsifying activity, stability and solubility, which can significantly improve the efficiency of recovering oil from oily sludge.

[0011] Preferably, the flocculant is one of polyaluminum sulfate, polyferric sulfate, polyaluminum chloride, and polyaluminum ferric bisphosphate.

[0012] By adopting the above technical scheme and using polymer flocculants such as polyaluminium sulfate, polyferric sulfate and polyaluminium chloride, the oil-water separation can be promoted through flocculation, thereby improving the recovery rate of sludge crude oil.

[0013] Preferably, the biological additive is a mixture of one or more of cellulase, lipase and protease.

[0014] By adopting the above technical scheme and using cellulase, lipase and protease as biological additives, the crude oil recovery rate of biosurfactants can be effectively improved, oil-water separation can be promoted, and biodegradability can be enhanced.

[0015] Preferably, the sulfate-type double hydrocarbon chain surfactant is prepared from the following raw materials in parts by weight: 10-20 parts of diglyceride, 38-76 parts of 1,2-dichloroethane, 7.2-14.5 parts of chlorosulfonic acid, and 0.1-0.2 parts of deionized water.

[0016] Preferably, the diglyceride is prepared from the following raw materials in parts by weight: 15-25 parts of triglyceride, 45-75 parts of acetone, 0.06-0.1 parts of sodium hydroxide, and 1-1.7 parts of glycerol; and the triglyceride is produced from Chlorella vulgaris.

[0017] Preferably, the method for preparing diglyceride comprises the following steps: Triglyceride is added into acetone and stirred to dissolve, sodium hydroxide is added and reacted with glycerol at 45-50°C under magnetic stirring for 8-10 hours to obtain diglyceride.

[0018] Preferably, the method for preparing the sulfate type double hydrocarbon chain surfactant comprises the following steps: Dissolve diglyceride in part of 1,2-dichloroethane, mix well to obtain a diglyceride solution; dissolve chlorosulfonic acid in the remaining 1,2-dichloroethane, mix well to obtain a chlorosulfonic acid solution; drop the chlorosulfonic acid solution into the diglyceride solution, and keep warm for 1-2 hours after the addition is completed; add deionized water after the reaction is completed and keep warm for 30-60 minutes to hydrolyze unreacted chlorosulfonic acid and part of the over-sulfonated parts; finally adjust the pH value of the reaction solution to 7-8, and obtain a sulfate-type double hydrocarbon chain surfactant after vacuum drying.

[0019] The present application also provides a method for preparing a bio-based active crude oil sludge recovery treatment agent, which adopts the following technical scheme: A method for preparing a bio-based active crude oil sludge recovery treatment agent comprises the following steps:

[0020] The biosurfactant, sulfate-type double hydrocarbon chain surfactant, nano-silica, flocculant, biological additive and water are weighed according to the mass ratio of raw materials; the sulfate-type double hydrocarbon chain surfactant is added into the water, and after stirring evenly, the biosurfactant, biological additive, flocculant and nano-silica are added successively, and after stirring evenly, a bio-based active crude oil sludge recovery treatment agent is obtained.

[0021] In summary, the present application includes at least one of the following beneficial technical effects: 1. The present application uses a sulfate-type double hydrocarbon chain surfactant and a biosurfactant as the main raw material of a crude oil sludge recovery treatment agent. The sulfate-type double hydrocarbon chain surfactant has a lower critical micelle concentration and better emulsification performance. It also has excellent biodegradability and is environmentally friendly. The sulfate-type double hydrocarbon chain surfactant and the biosurfactant are combined to effectively enhance the recovery efficiency of crude oil sludge.

[0022] 2. The present application adds nano-silicon dioxide to the compounded surfactant system, which can produce a synergistic effect and significantly improve the efficiency of recovering oil from oily sludge. DETAILED DESCRIPTION

[0023] The present application is further described in detail below with reference to the embodiments.

[0024] Preparation Example

[0025] Preparation Example 1

[0026] T1. 15 g of triglyceride produced from Chlorella was added to 45 g of acetone and stirred to dissolve, 0.06 g of sodium hydroxide and 1 g of glycerol were added and reacted under magnetic stirring at 45 ° C and 800 rpm for 8 h to obtain diglyceride; T2. Dissolve 10 g of diglyceride prepared by T1 in 26 g of 1,2-dichloroethane, mix well to obtain a diglyceride solution; dissolve 7.2 g of chlorosulfonic acid in 12 g of 1,2-dichloroethane, mix well to obtain a chlorosulfonic acid solution; drop the chlorosulfonic acid solution into the diglyceride solution, and keep the temperature at 50°C for 1 hour after the dropwise addition; after the reaction, add 0.1 g of deionized water and keep the temperature at 50°C for 30 minutes to hydrolyze the unreacted chlorosulfonic acid and some over-sulfonated sites; finally, use a 30% by mass NaOH solution to adjust the pH value of the reaction solution to 7, and obtain a sulfate-type double hydrocarbon chain surfactant after vacuum drying.

[0027] Preparation Example 2

[0028] T1. 20 g of triglyceride produced from Chlorella was added to 60 g of acetone and stirred to dissolve, 0.08 g of sodium hydroxide and 1.35 g of glycerol were added and reacted at 47 ° C and 850 rpm under magnetic stirring conditions for 9 hours to obtain diglyceride; T2. Dissolve 10 g of diglyceride prepared by T1 in 26 g of 1,2-dichloroethane, mix well to obtain a diglyceride solution; dissolve 7.2 g of chlorosulfonic acid in 12 g of 1,2-dichloroethane, mix well to obtain a chlorosulfonic acid solution; drop the chlorosulfonic acid solution into the diglyceride solution, and keep the temperature at 50°C for 1 hour after the dropwise addition; after the reaction, add 0.1 g of deionized water and keep the temperature at 50°C for 30 minutes to hydrolyze the unreacted chlorosulfonic acid and some over-sulfonated sites; finally, use a 30% by mass NaOH solution to adjust the pH value of the reaction solution to 7, and obtain a sulfate-type double hydrocarbon chain surfactant after vacuum drying.

[0029] Preparation Example 3

[0030] T1. 25 g of triglyceride produced from Chlorella was added to 75 g of acetone and stirred to dissolve, 0.1 g of sodium hydroxide and 1.7 g of glycerol were added and reacted under magnetic stirring conditions at 50 ° C and 900 rpm for 10 h to obtain diglyceride; T2. Dissolve 10 g of diglyceride prepared by T1 in 26 g of 1,2-dichloroethane, mix well to obtain a diglyceride solution; dissolve 7.2 g of chlorosulfonic acid in 12 g of 1,2-dichloroethane, mix well to obtain a chlorosulfonic acid solution; drop the chlorosulfonic acid solution into the diglyceride solution, and keep the temperature at 50°C for 1 hour after the dropwise addition; after the reaction, add 0.1 g of deionized water and keep the temperature at 50°C for 30 minutes to hydrolyze the unreacted chlorosulfonic acid and some over-sulfonated sites; finally, use a 30% by mass NaOH solution to adjust the pH value of the reaction solution to 7, and obtain a sulfate-type double hydrocarbon chain surfactant after vacuum drying.

[0031] Preparation Example 4

[0032] T1. 15 g of triglyceride produced from Chlorella was added to 45 g of acetone and stirred to dissolve, 0.06 g of sodium hydroxide and 1 g of glycerol were added and reacted under magnetic stirring at 45 ° C and 800 rpm for 8 h to obtain diglyceride; T2. Dissolve 15 g of diglyceride prepared by T1 in 38 g of 1,2-dichloroethane, mix well to obtain a diglyceride solution; dissolve 10.8 g of chlorosulfonic acid in 19 g of 1,2-dichloroethane, mix well to obtain a chlorosulfonic acid solution; drop the chlorosulfonic acid solution into the diglyceride solution, and keep the temperature at 53°C for 1.5 hours after the dropwise addition; add 0.15 g of deionized water after the reaction and keep the temperature at 53°C for 45 minutes to hydrolyze the unreacted chlorosulfonic acid and some over-sulfonated sites; finally, use a 30% by mass NaOH solution to adjust the pH value of the reaction solution to 7.5, and vacuum dry to obtain a sulfate-type double hydrocarbon chain surfactant.

[0033] Preparation Example 5

[0034] T1. 15 g of triglyceride produced from Chlorella was added to 45 g of acetone and stirred to dissolve, 0.06 g of sodium hydroxide and 1 g of glycerol were added and reacted under magnetic stirring at 45 ° C and 800 rpm for 8 h to obtain diglyceride; T2. Dissolve 20 g of diglyceride prepared by T1 in 51 g of 1,2-dichloroethane, mix well to obtain a diglyceride solution; dissolve 14.5 g of chlorosulfonic acid in 25 g of 1,2-dichloroethane, mix well to obtain a chlorosulfonic acid solution; drop the chlorosulfonic acid solution into the diglyceride solution, and keep the temperature at 55°C for 2 hours after the dropwise addition; after the reaction, add 0.2 g of deionized water and keep the temperature at 55°C for 60 minutes to hydrolyze the unreacted chlorosulfonic acid and some over-sulfonated sites; finally, use a 30% by mass NaOH solution to adjust the pH value of the reaction solution to 8, and obtain a sulfate-type double hydrocarbon chain surfactant after vacuum drying.

[0035] Example

[0036] Example 1

[0037] According to the mass ratio of raw materials, 15 g of biosurfactant, 5 g of sulfate-type double hydrocarbon chain surfactant, 1 g of nano-silica, 2 g of flocculant, 8 g of biological additive, and 69 g of water were weighed; the sulfate-type double hydrocarbon chain surfactant was added to the water, and after stirring evenly at 200 rpm, the biosurfactant, biological additive, flocculant, and nano-silica were added successively, and after stirring evenly at 200 rpm, a bio-based active crude oil sludge recovery treatment agent was obtained; The biosurfactant used in this example is rhamnolipid; the sulfate-type double hydrocarbon chain surfactant used is from Preparation Example 1; the flocculant used is polyaluminium sulfate; and the bio-adjuvant used is cellulase.

[0038] Example 2

[0039] According to the mass ratio of raw materials, 20 g of biosurfactant, 10 g of sulfate-type double hydrocarbon chain surfactant, 2 g of nano-silica, 3 g of flocculant, 11 g of biological additive, and 54 g of water were weighed; the sulfate-type double hydrocarbon chain surfactant was added to the water, and the biosurfactant, biological additive, flocculant, and nano-silica were added successively, and the mixture was stirred evenly at 250 rpm to obtain a bio-based active crude oil sludge recovery treatment agent; The biosurfactant used in this example is rhamnolipid; the sulfate-type double hydrocarbon chain surfactant used is from Preparation Example 1; the flocculant used is polyaluminium sulfate; and the bio-adjuvant used is cellulase.

[0040] Example 3

[0041] According to the mass ratio of raw materials, 25 g of biosurfactant, 15 g of sulfate-type double hydrocarbon chain surfactant, 3 g of nano-silica, 4 g of flocculant, 13 g of biological additive, and 40 g of water were weighed; the sulfate-type double hydrocarbon chain surfactant was added to the water, and the biosurfactant, biological additive, flocculant, and nano-silica were added successively, and the mixture was stirred evenly at 300 rpm to obtain a bio-based active crude oil sludge recovery treatment agent; The biosurfactant used in this example is rhamnolipid; the sulfate-type double hydrocarbon chain surfactant used is from Preparation Example 1; the flocculant used is polyaluminium sulfate; and the bio-adjuvant used is cellulase.

[0042] Example 4

[0043] The difference between Example 4 and Example 1 is that the biosurfactant used in Example 4 is a mixture of rhamnolipid and arabinoglucuronic acid xylan, and the mass ratio of the two is 1:0.6.

[0044] Example 5

[0045] The difference between Example 5 and Example 1 is that the biosurfactant used in Example 5 is a mixture of sophorolipids and arabinoglucuronic acid xylan, and the mass ratio of the two is 1:0.6

[0046] Example 6

[0047] The difference between Example 6 and Example 1 is that the biosurfactant used in Example 6 is arabinoglucuronic acid xylan.

[0048] Example 7

[0049] The difference between Example 7 and Example 1 is that the flocculant used in Example 7 is polymerized aluminum ferric bis(II) acid.

[0050] Example 8

[0051] The difference between Example 8 and Example 1 is that the flocculant used in Example 8 is polyferric sulfate.

[0052] Example 9

[0053] The difference between Example 9 and Example 1 is that the biological additive used in Example 9 is a mixture of lipase and protease, and the mass ratio of the two is 1:1.

[0054] Example 10

[0055] The difference between Example 10 and Example 1 is that the sulfate-type double hydrocarbon chain surfactant used in Example 10 comes from Preparation Example 2.

[0056] Embodiment 11

[0057] The difference between Example 11 and Example 1 is that the sulfate-type double hydrocarbon chain surfactant used in Example 11 comes from Preparation Example 3.

[0058] Example 12

[0059] The difference between Example 12 and Example 1 is that the sulfate-type double hydrocarbon chain surfactant used in Example 12 comes from Preparation Example 4.

[0060] Example 13

[0061] The difference between Example 13 and Example 1 is that the sulfate-type double hydrocarbon chain surfactant used in Example 13 comes from Preparation Example 5.

[0062] Comparative Example

[0063] Comparative Example 1

[0064] The difference between Comparative Example 1 and Example 1 is that no sulfate-type double hydrocarbon chain surfactant is added to the raw materials of Comparative Example 1; 15 g of biosurfactant, 1 g of nano-silicon dioxide, 2 g of flocculant, 8 g of bio-aid, and 84 g of water are weighed according to the mass ratio of the raw materials; the biosurfactant, the bio-aid, the flocculant, and the nano-silicon dioxide are added to the water in sequence, and after stirring evenly at 200 rpm, a bio-based active crude oil sludge recovery treatment agent is obtained; The biosurfactant used in this comparative example is rhamnolipid; the flocculant used is polyaluminium sulfate; and the bio-auxiliary agent used is cellulase.

[0065] Comparative Example 2

[0066] The difference between Comparative Example 2 and Example 1 is that nano-silicon dioxide is not added to the raw materials of Comparative Example 2; 15 g of biosurfactant, 5 g of sulfate-type double hydrocarbon chain surfactant, 2 g of flocculant, 8 g of biological additive, and 70 g of water are weighed according to the mass ratio of the raw materials; the sulfate-type double hydrocarbon chain surfactant is added to the water, and after stirring evenly at 200 rpm, the biosurfactant, the biological additive, and the flocculant are added successively, and after stirring evenly at 200 rpm, a bio-based active crude oil sludge recovery treatment agent is obtained; The biological surfactant used in this comparative example is rhamnolipid; the sulfate-type double hydrocarbon chain surfactant used is from Preparation Example 1; the flocculant used is polyaluminium sulfate; and the biological additive used is cellulase.

[0067] Comparative Example 3

[0068] The difference between Comparative Example 3 and Example 1 is that no flocculant is added to the raw materials of Comparative Example 3; 15 g of biosurfactant, 5 g of sulfate-type double hydrocarbon chain surfactant, 1 g of nano-silica, 8 g of biological additive, and 71 g of water are weighed according to the mass ratio of the raw materials; the sulfate-type double hydrocarbon chain surfactant is added to the water, and after stirring evenly at 200 rpm, the biosurfactant, the biological additive, the flocculant, and the nano-silica are added successively, and after stirring evenly at 200 rpm, a bio-based active crude oil sludge recovery treatment agent is obtained; The biological surfactant used in this comparative example is rhamnolipid; the sulfate-type double hydrocarbon chain surfactant used is from Preparation Example 1; and the biological auxiliary agent used is cellulase.

[0069] Performance testing

[0070] 1. Take 16 portions of fresh oil sludge, 40 g each, add the recovery treatment agent prepared by Examples 1-13 and Comparative Examples 1-3 respectively, put into a 250 mL conical flask, shake at 35 ° C, 200 rpm for 72 hours, and then let it stand for 1 hour; at this time, it is found that the mud, oil and liquid interfaces in the shake bottle are obviously separated, and there are three clear layers of upper (oil), middle (water) and lower (mud) with a large amount of leached oil floating on the liquid surface. The crude oil floating on the liquid surface is recovered, and the lower mud is taken out and air-dried to determine the oil content therein, and the recovery rate of crude oil and the residual oil rate in the sludge are calculated. The results are shown in Table 1.

[0071] The specific test results are as follows:

[0072] Table 1 Performance test results Recovery rate / % Residual oil rate / % Example 1 91.6 3.2 Example 2 95.2 1.1 Example 3 92.4 3.6 Example 4 94.3 1.9 Example 5 93.8 2.2 Example 6 90.7 3.8 Example 7 92.1 3.1 Example 8 91.4 3.5 Example 9 92.3 2.8 Example 10 92.7 2.7 Embodiment 11 91.4 3.3 Example 12 93.1 2.4 Embodiment 13 92.2 3.0 Comparative Example 1 56.7 39.2 Comparative Example 2 67.8 28.3 Comparative Example 3 71.3 24.5

[0073] It can be seen from the test results in Table 1 that the bio-based active crude oil sludge recovery treatment agent provided in the present application can achieve a crude oil recovery rate of more than 90%, indicating that the bio-based active crude oil sludge recovery treatment agent provided in the present application has a high crude oil recovery efficiency, and the product is easily biodegradable and highly environmentally friendly.

[0074] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. A bio-based active crude oil sludge recovery treatment agent, characterized in that: The raw materials include 15-25% of biological surfactant, 5-15% of sulfate type double hydrocarbon chain surfactant, 1-3% of nano silicon dioxide, 2-4% of flocculant, 8-13% of biological additive, and the balance is water.

2. The bio-based active crude oil sludge recovery treatment agent according to claim 1, characterized in that: The raw materials include, by mass percentage, 20% of biological surfactant, 10% of sulfate type double hydrocarbon chain surfactant, 2% of nano silicon dioxide, 3% of flocculant, 11% of biological additive, and the balance is water.

3. The bio-based active crude oil sludge recovery treatment agent according to claim 1 or 2, characterized in that: The biosurfactant is a mixture of one or more of rhamnolipid, trehalolipid, sophorolipid and arabinoglucuronic acid xylan.

4. The bio-based active crude oil sludge recovery agent according to claim 1 or 2, characterized in that: The flocculant is one of polyaluminium sulfate, polyferric sulfate, polyaluminium chloride and polyaluminium ferric bis(acid).

5. The bio-based active crude oil sludge recovery agent according to claim 1 or 2, characterized in that: The biological additive is a mixture of one or more of cellulase, lipase and protease.

6. The bio-based active crude oil sludge recovery agent according to claim 1 or 2, characterized in that: The sulfate type double hydrocarbon chain surfactant is prepared from the following raw materials in parts by weight: 10-20 parts of diglyceride, 38-76 parts of 1,2-dichloroethane, 7.2-14.5 parts of chlorosulfonic acid, and 0.1-0.2 parts of deionized water.

7. The bio-based active crude oil sludge recovery treatment agent according to claim 6, characterized in that: The diglyceride is prepared from the following raw materials in parts by weight: 15-25 parts of triglyceride, 45-75 parts of acetone, 0.06-0.1 parts of sodium hydroxide, and 1-1.7 parts of glycerol; the triglyceride is produced from Chlorella vulgaris.

8. The bio-based active crude oil sludge recovery agent according to claim 7, characterized in that: The method for preparing the diglyceride comprises the following steps: Add triglyceride into acetone and stir to dissolve, add sodium hydroxide and glycerol and react for 8-10 hours at 45-50°C under magnetic stirring to obtain diglyceride.

9. The bio-based active crude oil sludge recovery treatment agent according to claim 6, characterized in that: The preparation method of the sulfate type double hydrocarbon chain surfactant comprises the following steps: Dissolve diglyceride in part of 1,2-dichloroethane, mix well to obtain a diglyceride solution; dissolve chlorosulfonic acid in the remaining 1,2-dichloroethane, mix well to obtain a chlorosulfonic acid solution; drop the chlorosulfonic acid solution into the diglyceride solution, and keep warm for 1-2 hours after the addition is completed; add deionized water after the reaction is completed and keep warm for 30-60 minutes to hydrolyze unreacted chlorosulfonic acid and part of the over-sulfonated parts; finally adjust the pH value of the reaction solution to 7-8, and obtain a sulfate-type double hydrocarbon chain surfactant after vacuum drying.

10. A method for preparing a bio-based active crude oil sludge recovery treatment agent, used for preparing the bio-based active crude oil sludge recovery treatment agent according to any one of claims 1 to 9, characterized in that: The following steps are involved: The biosurfactant, sulfate-type double hydrocarbon chain surfactant, nano-silica, flocculant, biological additive and water are weighed according to the mass ratio of raw materials; the sulfate-type double hydrocarbon chain surfactant is added into the water, and after stirring evenly, the biosurfactant, biological additive, flocculant and nano-silica are added successively, and after stirring evenly, a bio-based active crude oil sludge recovery treatment agent is obtained.