CN114621781A - CO2Responsive microemulsion, preparation method thereof and method for treating oil-containing drilling cuttings - Google Patents
CO2Responsive microemulsion, preparation method thereof and method for treating oil-containing drilling cuttings Download PDFInfo
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- 238000005520 cutting process Methods 0.000 title claims abstract description 72
- 239000004530 micro-emulsion Substances 0.000 title claims abstract description 67
- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000005553 drilling Methods 0.000 title claims abstract description 35
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 239000003921 oil Substances 0.000 claims abstract description 101
- 239000002199 base oil Substances 0.000 claims abstract description 26
- 230000004044 response Effects 0.000 claims abstract description 17
- 238000000926 separation method Methods 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 26
- 238000002156 mixing Methods 0.000 claims description 18
- 239000002994 raw material Substances 0.000 claims description 16
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 claims description 15
- 239000000839 emulsion Substances 0.000 claims description 10
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical group [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims description 9
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 claims description 9
- 239000003945 anionic surfactant Substances 0.000 claims description 8
- 239000004064 cosurfactant Substances 0.000 claims description 8
- 150000001412 amines Chemical class 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 7
- SVYKKECYCPFKGB-UHFFFAOYSA-N N,N-dimethylcyclohexylamine Chemical compound CN(C)C1CCCCC1 SVYKKECYCPFKGB-UHFFFAOYSA-N 0.000 claims description 6
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical group [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims description 4
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 4
- 150000007942 carboxylates Chemical class 0.000 claims description 4
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims description 4
- DJEQZVQFEPKLOY-UHFFFAOYSA-N N,N-dimethylbutylamine Chemical compound CCCCN(C)C DJEQZVQFEPKLOY-UHFFFAOYSA-N 0.000 claims description 3
- 238000005119 centrifugation Methods 0.000 claims description 3
- XXBDWLFCJWSEKW-UHFFFAOYSA-N dimethylbenzylamine Chemical compound CN(C)CC1=CC=CC=C1 XXBDWLFCJWSEKW-UHFFFAOYSA-N 0.000 claims description 3
- QMHNQZGXPNCMCO-UHFFFAOYSA-N n,n-dimethylhexan-1-amine Chemical compound CCCCCCN(C)C QMHNQZGXPNCMCO-UHFFFAOYSA-N 0.000 claims description 3
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 2
- BCKXLBQYZLBQEK-KVVVOXFISA-M Sodium oleate Chemical compound [Na+].CCCCCCCC\C=C/CCCCCCCC([O-])=O BCKXLBQYZLBQEK-KVVVOXFISA-M 0.000 claims description 2
- PQZTVWVYCLIIJY-UHFFFAOYSA-N diethyl(propyl)amine Chemical compound CCCN(CC)CC PQZTVWVYCLIIJY-UHFFFAOYSA-N 0.000 claims description 2
- UVBMZKBIZUWTLV-UHFFFAOYSA-N n-methyl-n-propylpropan-1-amine Chemical compound CCCN(C)CCC UVBMZKBIZUWTLV-UHFFFAOYSA-N 0.000 claims description 2
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 2
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 2
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 2
- 235000011152 sodium sulphate Nutrition 0.000 claims description 2
- DAJSVUQLFFJUSX-UHFFFAOYSA-M sodium;dodecane-1-sulfonate Chemical compound [Na+].CCCCCCCCCCCCS([O-])(=O)=O DAJSVUQLFFJUSX-UHFFFAOYSA-M 0.000 claims description 2
- JZVZOOVZQIIUGY-UHFFFAOYSA-M sodium;tridecanoate Chemical group [Na+].CCCCCCCCCCCCC([O-])=O JZVZOOVZQIIUGY-UHFFFAOYSA-M 0.000 claims description 2
- 238000011084 recovery Methods 0.000 abstract description 30
- 238000004140 cleaning Methods 0.000 abstract description 7
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 238000004134 energy conservation Methods 0.000 abstract 1
- 238000005265 energy consumption Methods 0.000 abstract 1
- 239000000203 mixture Substances 0.000 description 10
- 230000000694 effects Effects 0.000 description 9
- 230000008569 process Effects 0.000 description 8
- 239000003795 chemical substances by application Substances 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
- CYTYCFOTNPOANT-UHFFFAOYSA-N Perchloroethylene Chemical group ClC(Cl)=C(Cl)Cl CYTYCFOTNPOANT-UHFFFAOYSA-N 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000002386 leaching Methods 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 229950011008 tetrachloroethylene Drugs 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 238000004566 IR spectroscopy Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 239000003225 biodiesel Substances 0.000 description 2
- 238000003795 desorption Methods 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000000638 solvent extraction Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- RCEAADKTGXTDOA-UHFFFAOYSA-N OS(O)(=O)=O.CCCCCCCCCCCC[Na] Chemical compound OS(O)(=O)=O.CCCCCCCCCCCC[Na] RCEAADKTGXTDOA-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000005194 fractionation Methods 0.000 description 1
- 239000002920 hazardous waste Substances 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G1/00—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal
- C10G1/04—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal by extraction
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/06—Arrangements for treating drilling fluids outside the borehole
Abstract
The invention relates to the technical field of petrochemical emission treatment, in particular to CO2Responsive microemulsions and methods of making and treating oil-bearing drill cuttings. CO of the invention2The responsive microemulsion can separate oil, so that the oil can be recycled, the separation steps are simple, the efficiency is high, the energy consumption is low, the safety, the environment friendliness, the energy conservation and the high efficiency of the treatment of the oily drilling cuttings are realized, and the problems of low treatment efficiency and high cost of the oily drilling cuttings in the prior art are solved. Wherein, CO2Preparation method of response type microemulsion and treatment method of oil-containing drilling cuttings, reaction conditions are mild, reaction is carried out at normal temperature and normal pressure, and used CO2The demulsification and recovery of the oil phase meet the requirements of environmental protection and industrial operation, and can greatly reduce the cost. Meanwhile, the oil-containing drilling cuttings treated by the microemulsion has the base oil recovery rate of over 80 percent and the residual oil content of the drilling cuttings after cleaning between 0.52 and 1.15 percent, which reaches the value specified in GB 4914-The discharge standard realizes the harmless treatment of the oil-containing drilling cuttings with high efficiency and low cost and the recovery of the base oil.
Description
Technical Field
The invention relates to the technical field of petrochemical emission treatment, in particular to CO2Responsive microEmulsions, methods of making the same, and methods of treating oil-bearing drill cuttings.
Background
Oil-bearing drill cuttings are a type of pollutant produced by oil-based drilling fluids used in drilling processes, and belong to national regulated hazardous wastes. The components are complex, the oil content is as high as 10-30%, and if the oil is directly discharged without treatment, not only can the environment be seriously polluted, but also the resource can be greatly wasted.
At present, the treatment technology of the oil-containing drilling cuttings mainly comprises an in-pit landfill method, a reinjection method, a microorganism treatment method, a heat washing centrifugation method, a solvent extraction method and the like. The pit landfill method has simple treatment process and low cost, but has the risk of polluting soil and water sources; the reinjection method has large treatment capacity, but has high treatment cost and cannot be generally used; the microbial treatment method has good treatment effect and less investment, but has long time consumption and is only suitable for partial areas; the hot washing centrifugal method has simple equipment and process and mild condition, but generates much waste water and needs to treat the waste water; the oil content of the residue after the thermal desorption treatment is low, the base oil can be recovered, the investment is large, and the equipment requirement is high; the oil content of the residue after the solvent extraction method is low, and the base oil can be recovered, but the investment is large, the requirement on an extracting agent is high, and high energy input such as distillation is needed.
For example, in the prior art, patent publication No. CN105201432A discloses a method for treating oil-containing drill cuttings by using an electromagnetic thermal desorption apparatus, which can effectively separate oil phase from drill cuttings, but requires input of energy such as heating, which is relatively expensive. The invention patent with publication number CN204198669U discloses a device for continuously pyrolyzing oily drilling cuttings, which can continuously feed and discharge slag when the oily drilling cuttings are pyrolyzed, and can recycle heat energy generated in the pyrolysis process. The invention patent with publication number CN104946291A discloses a supercritical CO2Method for treating oil-containing drill cuttings by extraction with supercritical CO2The invention has simple and convenient treatment process, small occupied area, no pollution and high extraction rate, but needs to use CO for treating the oil-containing drilling cuttings2Heating to supercritical state with warmingAnd the temperature reduction process is complex in treatment and low in efficiency. The invention patent with publication number CN108273843A discloses a leaching agent for oil-containing drill cuttings and oil-containing drilling wastes and a use method thereof, wherein the leaching agent can effectively reduce the content of oily substances and enable the oily substances to reach the discharge standard after treating the oil-containing drill cuttings, but the leaching agent can be recovered by fractionation, and the process needs heating, consumes energy and has high cost. The invention patent with publication number CN108467797A discloses a microemulsion, a preparation method and application thereof, and a treatment method of oily drill cuttings, and the microemulsion is used for cleaning the oily drill cuttings with good effect. But it only cleans the oil-laden cuttings and does not recover the oil.
In summary, the present treatment of the oil-containing drilling cuttings has the problems of low efficiency and high cost, so it is necessary to find a method for treating the oil-containing drilling cuttings with high efficiency and low cost, so as to protect the environment, save resources and realize the recycling of the resources.
Disclosure of Invention
Based on the above technical problems, it is an object of the present invention to provide CO2Responsive microemulsions and methods of making and treating oil-bearing drill cuttings.
The invention protects CO2Responsive microemulsion of the CO, based on 100 parts by weight2The response type microemulsion consists of the following raw materials in parts by weight: 10-12 parts of anionic surfactant, 19.5-20 parts of cosurfactant and oil phase and the balance of water, wherein the anionic surfactant is one of carboxylate, sulfate and sulfonate; the cosurfactant and the oil phase are amines.
Optimally, the CO is calculated by 100 parts by weight2The responsive microemulsion consists of the following raw materials in parts by weight: 10 parts of anionic surfactant, 20 parts of cosurfactant and oil phase, and the balance of water.
Further, the carboxylate is sodium dodecyl carboxylate or sodium oleate; the sulfate is sodium dodecyl sulfate or fatty alcohol-polyoxyethylene ether sodium sulfate; the sulfonate is sodium dodecyl benzene sulfonate or sodium dodecyl sulfonate; the amine is one of N, N-dimethylcyclohexylamine, N, N-dimethylbutylamine, N, N-dimethylbenzylamine, triethylamine, N-methyldipropylamine, N, N-diethylpropylamine, N, N-dimethylhexylamine, N, N, N-tripropylbutylamine and N, N, N-tributylpentylamine.
Preferably, the anionic surfactant is sodium dodecyl benzene sulfonate or sodium dodecyl sulfate; the cosurfactant and the oil phase are N, N-dimethylcyclohexylamine or triethylamine.
The invention also protects the above CO2The preparation method of the responsive microemulsion specifically comprises the following steps: after the raw materials in the proportion are mixed, the mixture is stirred for 5 minutes at the rotating speed of 300-400 r/min at normal temperature, and the CO can be obtained after the mixture is uniform2A responsive microemulsion.
The invention also protects the CO2The method for treating the oil-containing drilling cuttings by the responsive microemulsion comprises the following specific treatment steps:
step 1, adding oil-containing drill cuttings to the CO2In a responsive microemulsion;
step 3, introducing CO into the emulsion obtained after the treatment in the step 22Separating oil phase and water phase;
step 4, adding a proper amount of water into the separated oil phase for mixing, and then continuously introducing CO2Removing amines, standing and separating to recover the base oil.
Further, in the step 3, CO is introduced2Keeping for 3 minutes to clearly separate the oil phase and the water phase, and stopping introducing CO2(ii) a Then standing for 5 minutes to separate oil phase and water phase.
Further, the water phase in the step 3 is a surface active water solution.
Further, in the step 1, the CO2Oil-containing drilling cuttings and CO added into responsive microemulsion2Response type microemulsion and the like.
Compared with the prior art, the invention has the following beneficial effects:
CO of the invention2Preparation method of response type microemulsion and treatment method of oil-containing drilling cuttings, reaction conditions are mild, reaction is carried out at normal temperature and normal pressure, and used CO2Demulsifying and recovering the oil phase, is simple, convenient, fast and environment-friendly, meets the requirements of environmental protection and industrial operation, and can greatly reduce the cost. At the same time the CO2The recovery rate of the base oil of the oil-containing drilling cuttings treated by the response type microemulsion is over 80 percent, the residual oil content of the drilling cuttings after cleaning is between 0.52 and 1.15 percent, the oil-containing drilling cuttings reach the discharge standard specified in GB 4914-2008, and the harmless treatment of the oil-containing drilling cuttings and the recovery of the base oil with high efficiency and low cost are realized; the problems of low treatment efficiency and high cost of the oily drilling cuttings in the prior art are solved.
Drawings
FIG. 1 is a CO of the present invention2A schematic flow diagram of the responsive microemulsion for treating the oil-containing drilling cuttings;
FIG. 2 is a CO of the present invention2Comparing the front and the back of the response type microemulsion cleaning treatment of the oil-containing drilling cuttings;
FIG. 3 is a CO of the present invention2Responsive microemulsion display plots;
FIG. 4 shows the introduction of CO into the emulsion2The oil phase was then separated out as shown.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
CO2The preparation method of response type microemulsion comprises the steps of taking 10 parts by weight of sodium dodecyl benzene sulfonate, 20 parts by weight of N, N-dimethyl cyclohexylamine and the balance of water based on 100 parts by weight, mixing the raw materials, magnetically stirring the mixture for 5 minutes at the rotating speed of 300 revolutions per minute at normal temperature, and uniformly mixing the raw materials to obtain the CO2A responsive microemulsion. Wherein the CO is2The responsive microemulsion is uniform and transparent, and is a thermodynamically stable system (as shown in figure 3).
CO mentioned above2Method for treating oil-containing drilling cuttings by responsive microemulsion
(1) Simulating oil-containing drilling cutting preparation: putting the drill cuttings into a drying oven, drying for 24 hours at the temperature of 80 ℃, taking out, soaking the dried drill cuttings into mineral oil (Marcol 52), uniformly mixing, putting into an aging tank, aging for 24 hours at the high temperature of 180 ℃, taking out, drying for 24 hours at room temperature to obtain simulated oil-containing drill cuttings, and measuring the initial oil content by using an infrared oil measuring instrument (the specific operation steps are HJ1051-2019 infrared spectrophotometry for measuring soil petroleum);
(2) the microemulsion processing method comprises the following steps:
step 1, add equal mass of oil-bearing drill cuttings (as shown before washing in figure 2)) to CO2Responsive microemulsions (as shown in figure 3);
step 3, introducing CO into the emulsion obtained after the treatment in the step 22Separating oil phase (as shown in figure 4), introducing CO2Keeping for 3 minutes to clearly separate the oil phase and the water phase, and stopping introducing CO2(ii) a Then standing for 5 minutes to separate an oil phase and a water phase (surfactant aqueous solution);
step 4, adding a proper amount of water into the separated oil phase for mixing, and then continuously introducing CO2Removing amines, standing and separating to recover the base oil.
Wherein CO is continuously introduced into the microemulsion2The changes in conductivity and pH are detailed in table 1:
TABLE 1 continuous CO addition to the microemulsion2Change of conductivity and pH
(3) Determination of oil removal Rate
10g of the treated solid residue was weighed out and transferred to an Erlenmeyer flask, 20.0ml of tetrachloroethylene was added thereto, the mixture was sealed, and the mixture was put into a shaker and extracted at 200 times/min with shaking for 30 min. The extract was filtered into a 50ml colorimetric cylinder, extraction was repeated once with 20.0ml of tetrachloroethylene, and the flask and the like were washed with 10.0ml of tetrachloroethylene, and the extracts were combined. An infrared oil detector is used for measuring the oil content of the oil-containing drilling cuttings (the specific operation steps are HJ1051-2019 infrared spectrophotometry for measuring soil petroleum);
the treatment and recovery effects of the oily drill cuttings of example 1 are shown in table 2 below:
table 2 example 1 microemulsion oil drill cuttings treatment and base oil recovery effect
As can be seen from Table 2, the oil content of the oil-containing drill cuttings before treatment is 15%, which is between 10 and 30% according to the reported oil content of the oil-containing drill cuttings. With CO2The oil content of the response type microemulsion after cleaning is reduced to 0.60 percent, and the emission standard specified in GB 4914 and 2008 is reached. Simultaneously, introducing CO into the cleaned emulsion2And then, the oil phase can be recovered, the recovery rate of the base oil reaches 85 percent, and the environment-friendly harmless treatment of the oil-containing drilling cuttings and the recovery of the base oil are really realized. The detailed comparison of the oil-containing drilling cuttings before and after the cleaning treatment is shown in the attached figure 2.
Example 2
CO2The preparation method of response type microemulsion comprises the steps of taking 10 parts by weight of lauryl sodium sulfate, 19.5 parts by weight of N, N-dimethylcyclohexylamine and the balance of water based on 100 parts by weight, mixing the raw materials, magnetically stirring the mixture for 5 minutes at the rotating speed of 350 revolutions per minute at normal temperature, and uniformly mixing the raw materials to obtain the CO2A responsive microemulsion.
The oil recovery before and after the oily drill cuttings treatment and the base oil recovery were determined in the manner of example 1, as shown in table 3:
table 3 example 3 microemulsion oil drill cuttings treatment and base oil recovery effect
Example 3
CO2The preparation method of response type microemulsion comprises the steps of taking 12 parts of sodium dodecyl benzene sulfonate, 20 parts of N, N-dimethylbutylamine and the balance of water by 100 parts by weight, mixing the raw materials, magnetically stirring the mixture for 5 minutes at the normal temperature at the rotating speed of 400 revolutions per minute, and uniformly mixing to obtain the CO2A responsive microemulsion.
The oil recovery before and after the oily drill cuttings treatment and the base oil recovery were determined in the manner of example 1, as shown in table 4:
table 4 example 3 microemulsion oil-containing drill cuttings treatment and base oil recovery effect
Example 4
CO2The preparation method of the response type microemulsion comprises the steps of taking 12 parts of sodium dodecyl benzene sulfonate, 20 parts of N, N-dimethylbenzylamine and the balance of water by 100 parts by weight, mixing the raw materials, magnetically stirring the mixture for 5 minutes at the normal temperature at the rotating speed of 400 revolutions per minute, and uniformly mixing to obtain the CO2A responsive microemulsion.
The oil recovery before and after the oily drill cuttings treatment and the base oil recovery were determined in the manner of example 1, as shown in table 5:
table 5 example 4 microemulsion oil-containing drill cuttings treatment and base oil recovery effect
Example 5
CO2Of responsive microemulsionsThe preparation method comprises the steps of taking 11 parts by weight of sodium dodecyl benzene sulfonate, 20 parts by weight of triethylamine and the balance of water based on 100 parts by weight, mixing the raw materials, magnetically stirring the mixture for 5 minutes at the normal temperature at the rotating speed of 300 revolutions per minute, and uniformly mixing the raw materials to obtain the CO2A responsive microemulsion.
The oil recovery before and after the oily drill cuttings treatment and the base oil recovery were determined in the manner of example 1, as shown in table 6:
table 6 example 5 microemulsion oil-containing drill cuttings treatment and base oil recovery effect
Example 6
CO2The preparation method of response type microemulsion comprises the steps of taking 11 parts by weight of sodium dodecyl benzene sulfonate, 20 parts by weight of N, N-dimethylhexylamine and the balance of water based on 100 parts by weight, mixing the raw materials, magnetically stirring the mixture for 5 minutes at the rotating speed of 330 revolutions per minute at normal temperature, and uniformly mixing the raw materials to obtain the CO2A responsive microemulsion.
The oil recovery before and after the oily drill cuttings treatment and the base oil recovery were determined in the manner of example 1, as shown in table 7:
table 7 example 6 microemulsion oil drill cuttings treatment and base oil recovery effects
Example 7
The process was as described in example 1, except that:
with CO2The response type microemulsion treats the oil-containing drilling cuttings after gas-to-oil pretreatment. The oil recovery before and after the oily drill cuttings treatment and the base oil recovery were determined in the manner described in example 1 and shown in table 8:
TABLE 8 treatment of oily drill cuttings and base oil recovery from gas-to-oil pretreatment with microemulsion
Example 8
The process was as described in example 1, except that:
with CO2The response type microemulsion treats the oil-containing drilling cuttings after the pretreatment of the biodiesel. The oil recovery before and after the oily drill cuttings treatment and the base oil recovery were determined in the manner described in example 1 and shown in table 9:
TABLE 9 treatment of oily drill cuttings and base oil recovery after biodiesel pretreatment with microemulsion
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1.CO2Responsive microemulsion characterized in that the CO is present in 100 parts by weight2The response type microemulsion consists of the following raw materials in parts by weight: 10-12 parts of anionic surfactant, 19.5-20 parts of cosurfactant and oil phase and the balance of water, wherein the anionic surfactant is one of carboxylate, sulfate and sulfonate; the cosurfactant and the oil phase are amines.
2. CO according to claim 12Responsive microemulsion characterized in that said CO is present in 100 parts by weight2The response type microemulsion consists of the following raw materials in parts by weight: 10 parts of anionic surfactant, 20 parts of cosurfactant and oil phase, and the balance of water.
3. According to the rightCO according to claim 1 or 22The response type microemulsion is characterized in that the carboxylate is sodium dodecyl carboxylate or sodium oleate; the sulfate is sodium dodecyl sulfate or fatty alcohol-polyoxyethylene ether sodium sulfate; the sulfonate is sodium dodecyl benzene sulfonate or sodium dodecyl sulfonate; the amine is one of N, N-dimethylcyclohexylamine, N, N-dimethylbutylamine, N, N-dimethylbenzylamine, triethylamine, N-methyldipropylamine, N, N-diethylpropylamine, N, N-dimethylhexylamine, N, N, N-tripropylbutylamine and N, N, N-tributylpentylamine.
4. CO according to claim 32The response type microemulsion is characterized in that the anionic surfactant is sodium dodecyl benzene sulfonate or sodium dodecyl sulfate; the cosurfactant and the oil phase are N, N-dimethyl cyclohexylamine or triethylamine.
5.CO2The preparation method of the responsive microemulsion is characterized by comprising the following steps: mixing the raw materials in the proportion of claim 1 or 2, stirring at the rotation speed of 300-400 rpm for 5 minutes at normal temperature, and uniformly mixing to obtain the CO2A responsive microemulsion.
6.CO2The method for treating the oil-containing drill cuttings by the responsive microemulsion is characterized by comprising the following specific treatment steps of:
step 1, adding oil-containing drill cuttings to CO prepared according to claim 52In a responsive microemulsion;
step 2, oscillating for 30 minutes at constant temperature, and removing residues after centrifugal separation to obtain emulsion; wherein the centrifugation is repeated 3 times;
step 3, introducing CO into the emulsion obtained after the treatment in the step 22Separating oil phase and water phase;
step 4, adding a proper amount of water into the separated oil phase for mixing, and then continuously introducing CO2Removing amines, standing and separating to recover the base oil.
7. CO according to claim 62The method for treating the oil-containing drill cuttings by using the responsive microemulsion is characterized in that in the step 3, CO is introduced2Keeping for 3 minutes to clearly separate the oil phase and the water phase, and stopping introducing CO2(ii) a Then standing for 5 minutes to separate oil phase and water phase.
8. CO according to claim 72The method for treating the oil-containing drill cuttings by the responsive microemulsion is characterized in that the water phase in the step 3 is a surface active water solution.
9. CO according to claim 62A method for treating oil-containing drill cuttings with a responsive microemulsion, characterized in that in step 1, the CO is2Oil-containing drilling cuttings and CO added into responsive microemulsion2Response type microemulsion and the like.
Priority Applications (1)
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| CN115746817A (en) * | 2022-11-08 | 2023-03-07 | 中国地质大学（武汉） | CO (carbon monoxide) 2 Responsive tackifying system and preparation method and application thereof |
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