CN116023948A - Washing oil composition, preparation method and application thereof, and method for repairing thickened oil polluted soil - Google Patents
Washing oil composition, preparation method and application thereof, and method for repairing thickened oil polluted soil Download PDFInfo
- Publication number
- CN116023948A CN116023948A CN202111239378.3A CN202111239378A CN116023948A CN 116023948 A CN116023948 A CN 116023948A CN 202111239378 A CN202111239378 A CN 202111239378A CN 116023948 A CN116023948 A CN 116023948A
- Authority
- CN
- China
- Prior art keywords
- cyclodextrin
- oil composition
- oil
- amount
- soil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/20—Controlling water pollution; Waste water treatment
- Y02A20/204—Keeping clear the surface of open water from oil spills
Landscapes
- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to the technical field of soil pollution restoration in petroleum and petrochemical industry, and discloses a lotion composition, a preparation method and application thereof, and a method for restoring thick oil polluted soil. The wash oil composition contains the following components which are stored independently or stored by mixing more than two of the following components: the anionic sulfonate surfactant is a branched tail-chain type anionic sulfonate surfactant with a structure shown in a formula (I). The wash oil composition provided by the invention has the characteristics of low dosage, high wash oil efficiency and easiness in biodegradation, and meanwhile, the wash oil composition provided by the invention can be applied to the repair and treatment of thick oil polluted soil, so that the high-efficiency green leaching of thick oil pollutants is realized.
Description
Technical Field
The invention relates to the technical field of soil pollution restoration in petroleum and petrochemical industry, in particular to a wash oil composition, a preparation method and application thereof, and a method for restoring thick oil polluted soil.
Background
In recent years, soil pollution problems in the petrochemical industry have attracted a great deal of attention. Due to factors such as 'leakage', pipeline and storage tank leakage, illegal arrangement, sudden environmental accidents and the like caused by enterprise relocation and equipment aging, petroleum pollution exists in the soil of each enterprise in different degrees. In addition, the restoration of aged oil contaminated soil left over from the history of the oil field and the disposal of ground sludge, polymer-containing sludge, tank bottom sludge and the like collected at the oilfield complex become a serious problem.
Under the guidance of the concept of ecological priority and green development, how to repair polluted sites and realize green development is a key problem to be solved currently.
The soil ectopic leaching technology is a mature soil restoration technology and has the advantages of quick response and simple process. However, the content of Polycyclic Aromatic Hydrocarbons (PAHs) in soil pollutants in petroleum and petrochemical industry is high, the water solubility is poor, and the adhesion force on the soil surface is strong, so that the traditional eluent can not be effectively removed.
Thus, there is a need to develop efficient green soil leaches for PAHs-rich contaminated soil.
Soil leaches are typically oil-water amphiphilic surfactant-type molecules that rely on two mechanisms to clean crude oil in the soil: (1) a crimping mechanism. The surfactant gathers in a large amount between the soil and water and between the oil and water interfaces, so that the interfacial tension of the contact surface is reduced; meanwhile, the oil-water separation agent is adsorbed on the interface to generate a wetting and overturning effect, so that water can wet the surfaces of soil and oil, and the contact angle of the soil and the oil is increased, so that the adsorption force of the soil on the oil is reduced, and petroleum pollutants are stripped from the soil surface and migrate into the water phase. (2) solubilization mechanism. The surfactant forms aggregates such as micelles, vesicles and the like in water, and hydrophobic micro-regions inside the aggregates can solubilize oily pollutants with poor water solubility through a similar principle of miscibility, so that the oily pollutants are desorbed from the surface of soil particles and dispersed into an aqueous phase.
CN112724981a discloses a petroleum contaminated soil leaching agent composition, which consists of nonionic surfactant, amphoteric surfactant, alkaline substance and water, and can greatly reduce the content of petroleum hydrocarbon in the contaminated soil, and finally achieve the purpose of soil remediation and utilization. However, both nonionic surfactants and amphoteric surfactants, which are the main agents of the rinse agent composition, are weakly positive, and the amount of adsorbed water in the soil is large, which may result in an increase in the cost of the agent and a large retention. Therefore, the application range of the leaching agent composition provided by the technology is limited.
CN110404952a discloses a leaching agent for restoring polluted soil, which comprises the following components: 50-70 parts by weight of nonionic biosurfactant and 5-30 parts by weight of anionic surfactant. Through the coordination of the nonionic biosurfactant and the anionic surfactant, the solubilization of the leaching agent on soil organic pollutants, especially polycyclic aromatic hydrocarbon, is enhanced, and the leaching efficiency of the leaching agent is remarkably improved. However, the system is first subjected to a foaming treatment during use to increase the efficiency of the leaching agent in the soil medium. On the one hand, the foaming process is time-consuming and labor-consuming; on the other hand, in order to sufficiently exert the foam function, it is required that the foam of the system is as much and more stable as possible. However, after the rinsing is completed, the treatment of the remaining foam is also cumbersome.
Disclosure of Invention
The invention aims to solve the problems of low leaching efficiency, environmental pollution, complex operation and the like in the prior art, and provides a lotion composition for repairing thick oil polluted soil.
In order to achieve the above object, a first aspect of the present invention provides a wash oil composition for restoring thick oil contaminated soil, the wash oil composition comprising the following components stored independently or in a mixture of two or more of the following components: anionic sulfonate surfactant, cyclodextrin and water;
the anionic sulfonate surfactant is a branched tail chain type anionic sulfonate surfactant with a structure shown in a formula (I),
in formula (I), M is Na, K, li or NH 4 。
A second aspect of the present invention provides a process for preparing a wash oil composition as described in the first aspect, the process comprising: mixing an anionic sulfonate surfactant, cyclodextrin and water;
the definition of the anionic sulphonate surfactant is the same as that described in the first aspect.
A third aspect of the present invention provides the use of a wash oil composition according to the first aspect for remediation of heavy oil contaminated soil.
In a fourth aspect, the present invention provides a method of remediating thickened contaminated soil, the method comprising:
(1) Contacting and leaching the wash oil composition in the first aspect with thick oil polluted soil to obtain a mixture I;
(2) Subjecting the mixture I to solid-liquid separation.
The washing oil composition for repairing the thick oil polluted soil provided by the invention can improve the pollutant leaching efficiency in the thick oil polluted soil through the synergistic effect of the branched tail chain type anion sulfonate and the cyclodextrin. In addition, the two main components of the lotion composition are both easy to biodegrade, and the residual quantity in the soil is low, so that secondary pollution is avoided, and the method for repairing the thickened oil polluted soil is environment-friendly.
Drawings
FIG. 1 shows a multi-branched tail-chain type anionic sodium sulfonate surfactant BC prepared according to the preparation example of the present invention 16 SO 3 ESI mass spectrum of Na.
Detailed Description
The endpoints and any values of the ranges disclosed herein are not limited to the precise range or value, and are understood to encompass values approaching those ranges or values. For numerical ranges, one or more new numerical ranges may be found between the endpoints of each range, between the endpoint of each range and the individual point value, and between the individual point value, in combination with each other, and are to be considered as specifically disclosed herein.
As described above, the first aspect of the present invention provides a wash oil composition for repairing thick oil contaminated soil, the wash oil composition comprising the following components stored independently or in a mixture of two or more of the following components: anionic sulfonate surfactant, cyclodextrin and water;
the anionic sulfonate surfactant is a branched tail chain type anionic sulfonate surfactant with a structure shown in a formula (I),
in formula (I), M is Na, K, li or NH 4 。
Preferably, in formula (I), M is Na, K or NH 4 。
More preferably, in formula (I), M is Na.
The method for preparing the branched tail-chain type anionic sulfonate surfactant is not particularly limited in the present invention, but in order to obtain a better effect, the present invention preferably provides a method for preparing the anionic sulfonate surfactant as follows.
According to a preferred embodiment, the present invention provides a process for preparing a branched tail anionic sulfonate surfactant, the process comprising:
(1) Carrying out contact reaction on the superposed olefin shown in the formula (I-1), acrylonitrile and a sulfonating agent to obtain a mixture I;
(2) Adjusting the pH value of the mixture I to be more than or equal to 7 by using an alkaline substance containing M element;
in the alkaline substance, the definition of M is the same as that in the first aspect.
More preferably, the process for preparing the anionic sulfonate surfactant is carried out at atmospheric pressure.
More preferably, the sulfonating agent is selected from at least one of chlorosulfonic acid, sulfamic acid, fuming sulfuric acid, and sulfur trioxide.
Preferably, the molar ratio of the amount of said superimposed olefin, said acrylonitrile and said sulfonating agent is 1: (0.5-5): (1-10). More preferably, the molar ratio of the amount of said superimposed olefin, said acrylonitrile and said sulfonating agent used is 1: (1-2): (1-2).
Preferably, the conditions of the contact reaction at least satisfy: the temperature is 0-40 ℃ and the time is 0.5-12 h; more preferably, the conditions of the contact reaction at least satisfy: the temperature is 15-30 ℃ and the time is 4-8 h.
Preferably, the pH of the mixture I is adjusted with an alkaline substance.
Preferably, the alkaline substance is selected from at least one of lithium hydroxide, sodium hydroxide, potassium hydroxide, sodium bicarbonate, sodium carbonate, potassium bicarbonate, potassium carbonate, aqueous ammonia, and ammonium carbonate.
The process for preparing the anionic sulphonate surfactant described in the first aspect is preferably carried out with stirring, the speed of which is not particularly required and may be carried out using parameters known in the art.
Preferably, the route of the preparation method of the invention is as follows:
the laminated olefin feed of a specific carbon number can be obtained by subjecting the laminated process product to component cutting. The acrylonitrile, sulfonating agent and base used in the present invention may be commercially available chemical agents or may be prepared according to methods known in the art.
The preparation method of the anionic sulfonate surfactant is to prepare the branched tail chain type anionic sulfonate surfactant by taking industrial congruent olefins as raw materials and acrylonitrile as auxiliary materials through sulfonation and acid-base neutralization two-step one-pot method.
The preparation method provided by the invention is characterized in that at least the intermediate is prepared by one-pot reaction of the congruent olefin, the acrylonitrile and the sulfonating agent in proportion at normal temperature and normal pressure, and then the final product is prepared by acid-base neutralization reaction.
Preferably, the cyclodextrin is selected from at least one of α -cyclodextrin, β -cyclodextrin and γ -cyclodextrin.
In order to further increase the leaching efficiency of the wash oil composition on heavy oil contaminants, the stripping and dispersion of petroleum from the soil surface is enhanced, more preferably the cyclodextrin is beta-cyclodextrin and/or gamma-cyclodextrin.
Preferably, in the first aspect of the present invention, the anionic sulfonate surfactant is contained in an amount of 0.5 to 1wt%, the cyclodextrin is contained in an amount of 0.1 to 0.5wt%, and the water is contained in an amount of 98.5 to 99.4wt%, based on the total weight of the wash oil composition.
More preferably, the anionic sulfonate surfactant is present in an amount of 0.8 to 1wt%, the cyclodextrin is present in an amount of 0.3 to 0.5wt% and the water is present in an amount of 98.5 to 98.9wt%.
As previously mentioned, a second aspect of the present invention provides a process for preparing a wash oil composition as described in the first aspect, the process comprising: the anionic sulfonate surfactant, cyclodextrin and water are mixed.
The definition of the anionic sulphonate surfactant is the same as that described in the first aspect, and the present invention will not be described in detail in the second aspect, and those skilled in the art should not be construed as limiting the present invention.
In the second aspect of the present invention, preferably, the cyclodextrin is selected from at least one of α -cyclodextrin, β -cyclodextrin and γ -cyclodextrin.
More preferably, the cyclodextrin is beta-cyclodextrin and/or gamma-cyclodextrin.
Preferably, in the second aspect of the present invention, the anionic sulfonate surfactant is used in an amount of 0.5 to 1wt%, the cyclodextrin is used in an amount of 0.1 to 0.5wt%, and the water is used in an amount of 98.5 to 99.4wt%, based on the total weight of the anionic sulfonate surfactant, the cyclodextrin and the water.
More preferably, the anionic sulfonate surfactant is used in an amount of 0.8 to 1wt%, the cyclodextrin is used in an amount of 0.3 to 0.5wt%, and the water is used in an amount of 98.5 to 98.9wt%.
Preferably, the mixing conditions at least satisfy: the temperature is 15-40 ℃, the stirring speed is 300-800rpm, and the stirring time is 10-30min.
The water of the present invention may be deionized water, tap water, etc., and is not particularly limited.
As previously mentioned, a third aspect of the present invention provides the use of a wash oil composition according to the first aspect for remediation of heavy oil contaminated soil.
The washing oil composition provided by the invention has good application effect on thick oil polluted soil with the hydrocarbon oil content of more than or equal to 5wt%, and the washing oil efficiency is more than 80%.
As previously mentioned, a fourth aspect of the present invention provides a method of remediating thickened contaminated soil, the method comprising:
(1) Contacting and leaching the wash oil composition in the first aspect with thick oil polluted soil to obtain a mixture I;
(2) Subjecting the mixture I to solid-liquid separation.
Preferably, in step (1), the conditions of the contact rinse at least satisfy: the temperature is 25-80 ℃ and the time is 1-6 h.
More preferably, the conditions of the contact rinse are at least: the temperature is 40-60 ℃ and the time is 2-4 h.
Preferably, the dosage weight ratio of the wash oil composition to the thick oil contaminated soil is 3:1 to 10:1.
In order to further improve the leaching efficiency of the wash oil composition, more preferably, the weight ratio of the wash oil composition to the thick oil contaminated soil is 3:1 to 6:1.
Preferably, in the fourth aspect of the present invention, the hydrocarbon oil content in the thick oil contaminated soil is 5wt% or more.
The method for repairing the thickened oil polluted soil is environment-friendly and simple in process, and the two main components of the used wash oil composition are nontoxic and are easy to biodegrade, so that secondary pollution is avoided.
The invention will be described in detail below by way of examples. In the examples below, the reagents used were all commercially available chemical reagents, as specified in Table 1.
The hydrocarbon oil content in the soil according to the present invention is calculated by a weight method, unless otherwise specified.
The main raw materials used in the preparation examples, and comparative examples are shown in table 1.
TABLE 1
| Name of product | Abbreviations (abbreviations) | Source | Purity of |
| C 16 Superimposed olefins | - | The superposition process product is obtained by cutting the components | 95％ |
| Acrylonitrile (Acrylonitrile) | - | "Bailingwei | AR |
| Chlorosulfonic acid | - | Chinese medicine | >98％ |
| Sodium hydroxide | - | Chinese medicine | >99％ |
| Alpha-cyclodextrin | - | Alatine | >99％ |
| Beta-cyclodextrin | - | Alatine | >99％ |
| Gamma-cyclodextrin | - | Alatine | >98％ |
| Alpha-alkenyl sodium sulfonate | AOS | Zhejiang Jiesha | >98％ |
Preparation example 1
Based on C 16 Branched tail-chain type anionic sulfonate surfactant BC for congruent olefins 16 SO 3 Preparation of Na:
weighing C 16 22.4 g of superposed olefin is added into a reaction bottle, 10.6 g of acrylonitrile is added, and the mixture is stirred uniformly. Then, 23.3 g of chlorosulfonic acid was weighed into a dropping funnel, and was added dropwise to the reaction flask while stirring. After chlorosulfonic acid is added, stirring is continued, and the reaction is carried out for 8 hours at 25 ℃ and normal pressure. Subsequently, 8g of sodium hydroxide is weighed and dissolved in 50 ml of water, and added into the reaction system for a plurality of times until the pH value of the system is 9, thus obtaining the product BC 16 SO 3 Na。
BC will be added 16 SO 3 After freeze drying of the Na product system, the product was characterized by ESI-MS. As shown in FIG. 1, 374.3049 ((M-Na) in the product system - ) The peak is highest, namely BC 16 SO 3 Molecular ion peak of Na proves that the product is successfully prepared.
In the following examples and comparative examples, the thick oil contaminated soil used was prepared according to the following steps:
5000g of uncontaminated soil (from Henan oilfield) was crushed, dried in an incubator at 150℃for 6 hours, and 100 mesh dried soil was obtained by a classifying screen. The sieved soil and crude oil are respectively placed in an incubator at 80 ℃ for 8 hours. 95g of dried soil is taken, 5g (density 0.922 g/mL) of dense oil of Henan oilfield is added, and the mixture is mixed at 80 ℃. The soil mixed with the crude oil is placed in a 50 ℃ incubator for aging for one week, and an oil-containing soil sample with an oil content of 5wt% is prepared.
The oil removal rate and residual oil content of the wash oil composition were calculated as follows:
oil removal rate of oil-containing soil = ρv/(0.5 g) 100%
Residual oil content in soil after washing= (0.5 g- ρv)/m 100%
Wherein:
ρ is the density of the crude oil, which is 0.922g/mL;
v is the volume of the crude oil read out after liquid-solid separation, and mL;
m is the mass of the oil-containing soil after liquid-solid separation and g.
Example 1
1g of branched tail-chain type anionic sodium sulfonate surfactant BC is added at 35 ℃ and 500rpm 16 SO 3 Na and 0.5g of beta-cyclodextrin are added into 98.5g of water, and the mixture is stirred for 15min until the mixture is completely dissolved, thus obtaining the wash oil composition.
The method for repairing the thick oil polluted soil comprises the following steps:
(1) 10g of oil-containing soil was weighed, 60g of wash oil composition was added to a triangular flask, and placed in a shaker heated to 60℃and shaken at a constant rate for 4 hours.
(2) Standing a mixed system of oil-containing soil and wash oil composition, settling and separating, taking out an upper solution, transferring the upper solution into a graduated centrifugal test tube, performing centrifugal separation at 6000rpm, and reading the volume V of the separated oil to be 0.49mL; the lower solid is dried and weighed.
The oil washing efficiency of example 1 was 90.4% and the residual oil content in the soil was 0.51% by the calculation formula.
Example 2
1g branched tail chain type anionic sodium sulfonate surfactant BC at 20 ℃ and 500rpm 16 SO 3 Na and 0.1g of gamma-cyclodextrin are added into 98.9g of water, and stirred for 30min until the mixture is completely dissolved, thus obtaining the wash oil composition.
The method for repairing the thick oil polluted soil comprises the following steps:
(1) 10g of oil-containing soil was weighed, 30g of wash oil composition was added to a triangular flask, and placed in a shaker heated to 60℃and shaken at a constant rate for 4 hours.
(2) Standing a mixed system of oil-containing soil and wash oil composition, settling and separating, taking out an upper solution, transferring the upper solution into a graduated centrifugal test tube, performing centrifugal separation at 6000rpm, and reading the volume V of the separated oil to be 0.47mL; and drying the lower solid and weighing.
The oil washing efficiency of example 2 was 86.7% and the residual oil content in the soil was 0.70% by calculation formula.
Example 3
0.5g branched tail anionic sodium sulfonate surfactant BC at 25 ℃ and 500rpm 16 SO 3 Na and 0.5g of beta-cyclodextrin are added into 99g of water, and the mixture is stirred for 20min until the mixture is completely dissolved, thus obtaining the wash oil composition.
The method for repairing the thick oil polluted soil comprises the following steps:
(1) 10g of oil-containing soil is weighed, 60g of efficient wash oil system is added into a triangular flask, and the triangular flask is placed in a shaking table to be heated to 40 ℃ and is kept at a constant speed to shake for 6 hours.
(2) Standing a mixed system of oil-containing soil and wash oil composition, settling and separating, taking out an upper solution, transferring the upper solution into a graduated centrifugal test tube, performing centrifugal separation at 6000rpm, and reading the volume V of the separated oil to be 0.46mL; and drying the lower solid and weighing.
The oil washing efficiency of example 3 was 84.8% and the residual oil content in the soil was 0.79% by the calculation formula.
Example 4
1g of branched tail-chain type anionic sodium sulfonate surfactant BC is added at 30 ℃ and 500rpm 16 SO 3 Na and 0.3g of beta-cyclodextrin are added into 98.7g of water, and the mixture is stirred for 20min until the mixture is completely dissolved, thus obtaining the wash oil composition.
The method for repairing the thick oil polluted soil comprises the following steps:
(1) 10g of oil-containing soil was weighed, 40g of wash oil composition was added to a triangular flask, and placed in a shaker heated to 50℃and shaken at a constant rate for 5 hours.
(2) Standing a mixed system of oil-containing soil and wash oil composition, settling and separating, taking out an upper solution, transferring the upper solution into a graduated centrifugal test tube, performing centrifugal separation at 6000rpm, and reading the volume V of the separated oil to be 0.45mL; and drying the lower solid and weighing.
The oil washing efficiency of example 4 was 82.98% and the residual oil content in the soil was 0.89% by the calculation formula.
Example 5
0.8g branched tail anionic sodium sulfonate surfactant BC at 20 ℃ and 500rpm 16 SO 3 Na and 0.3g of alpha-cyclodextrin are added into 98.9g of water, and stirred for 25min until the mixture is completely dissolved, thus obtaining the wash oil composition.
The method for repairing the thick oil polluted soil comprises the following steps:
(1) 10g of oil-containing soil is weighed, 80g of efficient wash oil system is added into a triangular flask, and the triangular flask is placed in a shaking table to be heated to 65 ℃ and kept at a constant speed for shaking for 3 hours.
(2) Standing a mixed system of oil-containing soil and wash oil composition, settling and separating, taking out an upper solution, transferring the upper solution into a graduated centrifugal test tube, performing centrifugal separation at 6000rpm, and reading the volume V of the separated oil to be 0.44mL; and drying the lower solid and weighing.
The washing oil efficiency of example 5 was 81.14% and the residual oil content in the soil was 0.99% by calculation of the formula.
Comparative example 1
1g of linear anionic sodium sulfonate surfactant AOS and 0.5g of beta-cyclodextrin are added into 98.5g of water at 35 ℃ and 500rpm, and stirred for 15min until the mixture is completely dissolved, thus obtaining the wash oil composition.
The method for repairing the thick oil polluted soil comprises the following steps:
(1) 10g of oil-containing soil was weighed, 60g of wash oil composition was added to a triangular flask, and placed in a shaker heated to 60℃and shaken at a constant rate for 4 hours.
(2) Standing a mixed system of oil-containing soil and wash oil composition, settling and separating, taking out an upper solution, transferring the upper solution into a graduated centrifugal test tube, performing centrifugal separation at 6000rpm, and reading the volume V of the separated oil to be 0.32mL; and drying the lower solid and weighing.
The oil washing efficiency of comparative example 1 was 59.0% and the residual oil content in the soil was 2.13% by the calculation formula.
Comparative example 2
1.5g of beta-cyclodextrin is added into 98.5g of water at 35 ℃ and 500rpm, and the mixture is stirred for 15min until the beta-cyclodextrin is completely dissolved, thus obtaining the wash oil composition.
The method for repairing the thick oil polluted soil comprises the following steps:
(1) 10g of oil-containing soil was weighed, 60g of wash oil composition was added to a triangular flask, and placed in a shaker heated to 60℃and shaken at a constant rate for 4 hours.
(2) Standing a mixed system of oil-containing soil and wash oil composition, settling and separating, taking out an upper solution, transferring the upper solution into a graduated centrifugal test tube, performing centrifugal separation at 6000rpm, and reading the volume V of the separated oil to be 0.24mL; and drying the lower solid and weighing.
The oil washing efficiency of comparative example 2 was 44.3% and the residual oil content in the soil was 2.88% by the calculation formula.
Comparative example 3
1.5g of branched tail-chain type anionic sodium sulfonate surfactant BC is added at 35 ℃ and 500rpm 16 SO 3 Na is added into 98.5g of water and stirred for 15min until the Na is completely dissolved, thus obtaining the wash oil composition.
The method for repairing the thick oil polluted soil comprises the following steps:
(1) 10g of oil-containing soil was weighed, 60g of wash oil composition was added to a triangular flask, and placed in a shaker heated to 60℃and shaken at a constant rate for 4 hours.
(2) Standing a mixed system of oil-containing soil and wash oil composition, settling and separating, taking out an upper solution, transferring the upper solution into a graduated centrifugal test tube, performing centrifugal separation at 6000rpm, and reading the volume V of the separated oil to be 0.31mL; and drying the lower solid and weighing.
The oil washing efficiency of comparative example 3 was 57.2% and the residual oil content in the soil was 2.21% by the calculation formula.
According to the five embodiments, the oil washing efficiency of the oil washing composition formed by compounding the branched tail chain type anionic sodium sulfonate surfactant and the cyclodextrin is over 80%, the content of residual oil in soil can be reduced to 0.51% at the minimum, and the leaching effect on thick oil pollutants is good.
Example 1 in comparison to comparative example 1, a lotion composition was prepared by replacing the branched tail anionic sulfonate surfactant with the linear anionic sulfonate surfactant AOS, and mixing with cyclodextrin, water. Experimental results show that the branched tail chain type anionic sodium sulfonate surfactant has better oil washing effect compared with the traditional linear chain type anionic sulfonate surfactant, and the reason is that the branched tail chain structure enables the anionic sodium sulfonate surfactant to have stronger wetting reversal capability.
Example 1 was compared to comparative example 2 and comparative example 3 and found that the use of cyclodextrin alone or branched tail anionic sodium sulfonate surfactant to prepare a lotion composition, while enabling the washing of heavy oil contaminants, was not efficient in washing oil. Therefore, branched tail anionic sodium sulfonate surfactants and cyclodextrins are indispensable in the lotion compositions provided herein.
Meanwhile, the branched tail chain type anionic sodium sulfonate surfactant and cyclodextrin are nontoxic and are easy to biodegrade, and secondary pollution is avoided, so that the method for repairing the heavy oil polluted soil is environment-friendly.
In conclusion, the lotion composition provided by the invention has a good effect of cleaning an oil film on the surface of soil by effectively cooperating the curling and peeling action of the branched tail-chain type anionic sodium sulfonate surfactant and the dissolution action of cyclodextrin, the oil washing efficiency of the lotion composition is more than 80%, the content of residual oil in the soil can be reduced to 0.51%, and the lotion composition has the characteristics of low consumption, high oil washing efficiency and easiness in biodegradation. Meanwhile, the wash oil composition provided by the invention can be applied to restoration treatment of thick oil polluted soil in petroleum and petrochemical industry, and realizes efficient green leaching of thick oil pollutants.
The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, a number of simple variants of the technical solution of the invention are possible, including combinations of the individual technical features in any other suitable way, which simple variants and combinations should likewise be regarded as being disclosed by the invention, all falling within the scope of protection of the invention.
Claims (14)
1. The wash oil composition for repairing the thick oil polluted soil is characterized by comprising the following components which are stored independently or stored in a mixed manner by more than two of the following components: anionic sulfonate surfactant, cyclodextrin and water;
the anionic sulfonate surfactant is a branched tail chain type anionic sulfonate surfactant with a structure shown in a formula (I),
in formula (I), M is Na, K, li or NH 4 。
2. The wash oil composition of claim 1, wherein in formula (I), M is Na, K or NH 4 ；
Preferably, in formula (I), M is Na.
3. The wash oil composition according to claim 1 or 2, wherein the cyclodextrin is selected from at least one of α -cyclodextrin, β -cyclodextrin and γ -cyclodextrin;
preferably, the cyclodextrin is β -cyclodextrin and/or γ -cyclodextrin.
4. A wash oil composition according to any one of claims 1 to 3, wherein the anionic sulphonate surfactant is present in an amount of 0.5 to 1wt%, the cyclodextrin is present in an amount of 0.1 to 0.5wt% and the water is present in an amount of 98.5 to 99.4wt%, based on the total weight of the wash oil composition.
5. A wash oil composition according to any one of claims 1 to 3, wherein the anionic sulphonate surfactant is present in an amount of 0.8 to 1wt%, the cyclodextrin is present in an amount of 0.3 to 0.5wt% and the water is present in an amount of 98.5 to 98.9wt%, based on the total weight of the wash oil composition.
6. A process for preparing a wash oil composition as defined in any one of claims 1-5, comprising: mixing an anionic sulfonate surfactant, cyclodextrin and water;
the definition of the anionic sulfonate surfactant is the same as that in claim 1 or 2.
7. The method of claim 6, wherein the cyclodextrin is selected from at least one of α -cyclodextrin, β -cyclodextrin, and γ -cyclodextrin;
preferably, the cyclodextrin is β -cyclodextrin and/or γ -cyclodextrin.
8. The method of claim 6 or 7, wherein the amount of anionic sulfonate surfactant is 0.5 to 1wt%, the amount of cyclodextrin is 0.1 to 0.5wt%, and the amount of water is 98.5 to 99.4wt%, based on the total weight of the anionic sulfonate surfactant, the cyclodextrin, and the water;
preferably, the amount of the anionic sulfonate surfactant is 0.8 to 1wt%, the amount of the cyclodextrin is 0.3 to 0.5wt%, and the amount of the water is 98.5 to 98.9wt%, based on the total weight of the anionic sulfonate surfactant, the cyclodextrin and the water.
9. The method according to any of claims 6-8, wherein the mixing conditions at least satisfy: the temperature is 15-40 ℃, the stirring speed is 300-800rpm, and the stirring time is 10-30min.
10. Use of the wash oil composition of any one of claims 1-5 for remediation of heavy oil contaminated soil.
11. A method for remediating thickened contaminated soil, the method comprising:
(1) Contacting the wash oil composition of any one of claims 1-5 with thickened oil contaminated soil to obtain a mixture I;
(2) Subjecting the mixture I to solid-liquid separation.
12. The method of claim 11, wherein in step (1), the conditions of the contact rinse at least satisfy: the temperature is 25-80 ℃ and the time is 1-6 h;
preferably, the conditions of the contact rinse are at least: the temperature is 40-60 ℃ and the time is 2-4 h.
13. The method of claim 11 or 12, wherein the wash oil composition is used in an amount weight ratio to the thick oil contaminated soil of 3:1 to 10:1;
preferably, the dosage weight ratio of the wash oil composition to the thick oil contaminated soil is 3:1 to 6:1.
14. The method of any one of claims 11-13, wherein the hydrocarbon oil content in the thickened oil contaminated soil is greater than or equal to 5wt%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111239378.3A CN116023948A (en) | 2021-10-25 | 2021-10-25 | Washing oil composition, preparation method and application thereof, and method for repairing thickened oil polluted soil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111239378.3A CN116023948A (en) | 2021-10-25 | 2021-10-25 | Washing oil composition, preparation method and application thereof, and method for repairing thickened oil polluted soil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116023948A true CN116023948A (en) | 2023-04-28 |
Family
ID=86079995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111239378.3A Pending CN116023948A (en) | 2021-10-25 | 2021-10-25 | Washing oil composition, preparation method and application thereof, and method for repairing thickened oil polluted soil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116023948A (en) |
-
2021
- 2021-10-25 CN CN202111239378.3A patent/CN116023948A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Wang et al. | Efficient remediation of crude oil-contaminated soil using a solvent/surfactant system | |
| CA1070631A (en) | Solids recovery from coal liquefaction slurry | |
| Bao et al. | Study on the treatment of oily sludge in oil fields with lipopeptide/sophorolipid complex bio-surfactant | |
| CN104876405A (en) | Method for cleaning aged oil sludge | |
| US6093689A (en) | Asphalt and heavy oil degreaser | |
| KR20010032131A (en) | Heavy Oil Remover | |
| CN102826728A (en) | Cleaning agent applied to treatment of oily sludge by hot washing method and preparation method thereof | |
| JPH02277593A (en) | Process for separating water and oil from sludge | |
| KR20010071592A (en) | Heavy Oil Remover | |
| CN116023948A (en) | Washing oil composition, preparation method and application thereof, and method for repairing thickened oil polluted soil | |
| US6197734B1 (en) | High wax content heavy oil remover | |
| CN110272174B (en) | Alkaline separating agent and application thereof in treatment of oil sludge | |
| CN113305140B (en) | Step cleaning method for clay soil polluted by high-dispersion petroleum hydrocarbon | |
| CN115739957A (en) | Method and device for repairing polycyclic aromatic hydrocarbon polluted soil through cyclic synergism of surfactant | |
| CN109181890B (en) | Wiping-free car washing liquid and preparation method thereof | |
| CN115707755A (en) | Leacheate as well as preparation method and application thereof | |
| ITMI942384A1 (en) | RECLAMATION OF POLLUTING WET SOILS | |
| CN111826162A (en) | Graphene amphiphilic nano material and method for repairing polluted soil | |
| CN105802322A (en) | Environment-friendly water-based plastic paint remover and preparation method thereof | |
| CN114535272B (en) | Microemulsion for soil remediation, preparation method thereof and petroleum-polluted soil remediation method | |
| JP2005162780A (en) | Detergent composition and detergent for liquid crystal cell | |
| CN114573213B (en) | Treating agent and treating method for oily sludge treatment | |
| WO2015179928A1 (en) | Modified terpene formulation for removing petroleum oils from contaminated soils, modified terpene-based concentrated oil-in-water emulsion and use of a modified terpene-based formulation for cleaning contaminated soils | |
| BR102012012717A2 (en) | NATURAL FORMULATION FOR REMOVAL OF OIL DERIVATIVE OILS FROM VARIOUS SURFACES | |
| CN111978977B (en) | Efficient water-soluble compound aging oil demulsifier and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |