CN117247163A - Oil field sewage treatment scale inhibitor and preparation method thereof - Google Patents
Oil field sewage treatment scale inhibitor and preparation method thereof Download PDFInfo
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- CN117247163A CN117247163A CN202210654354.2A CN202210654354A CN117247163A CN 117247163 A CN117247163 A CN 117247163A CN 202210654354 A CN202210654354 A CN 202210654354A CN 117247163 A CN117247163 A CN 117247163A
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- Prior art keywords
- scale inhibitor
- sewage treatment
- acid
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- oilfield sewage
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- 239000002455 scale inhibitor Substances 0.000 title claims abstract description 35
- 239000010865 sewage Substances 0.000 title claims abstract description 23
- 238000002360 preparation method Methods 0.000 title claims abstract description 20
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims abstract description 78
- 238000006243 chemical reaction Methods 0.000 claims abstract description 43
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 41
- 229910021392 nanocarbon Inorganic materials 0.000 claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 29
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000010438 heat treatment Methods 0.000 claims abstract description 26
- 238000000034 method Methods 0.000 claims abstract description 26
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 19
- 239000011574 phosphorus Substances 0.000 claims abstract description 19
- ABLZXFCXXLZCGV-UHFFFAOYSA-N Phosphorous acid Chemical compound OP(O)=O ABLZXFCXXLZCGV-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 13
- 238000001035 drying Methods 0.000 claims abstract description 12
- 239000000706 filtrate Substances 0.000 claims abstract description 12
- 238000001914 filtration Methods 0.000 claims abstract description 12
- 239000012295 chemical reaction liquid Substances 0.000 claims abstract description 5
- BAERPNBPLZWCES-UHFFFAOYSA-N (2-hydroxy-1-phosphonoethyl)phosphonic acid Chemical compound OCC(P(O)(O)=O)P(O)(O)=O BAERPNBPLZWCES-UHFFFAOYSA-N 0.000 claims description 18
- 229940120146 EDTMP Drugs 0.000 claims description 7
- LOGBRYZYTBQBTB-UHFFFAOYSA-N butane-1,2,4-tricarboxylic acid Chemical compound OC(=O)CCC(C(O)=O)CC(O)=O LOGBRYZYTBQBTB-UHFFFAOYSA-N 0.000 claims description 7
- 229940090960 diethylenetriamine pentamethylene phosphonic acid Drugs 0.000 claims description 7
- DUYCTCQXNHFCSJ-UHFFFAOYSA-N dtpmp Chemical compound OP(=O)(O)CN(CP(O)(O)=O)CCN(CP(O)(=O)O)CCN(CP(O)(O)=O)CP(O)(O)=O DUYCTCQXNHFCSJ-UHFFFAOYSA-N 0.000 claims description 7
- NFDRPXJGHKJRLJ-UHFFFAOYSA-N edtmp Chemical compound OP(O)(=O)CN(CP(O)(O)=O)CCN(CP(O)(O)=O)CP(O)(O)=O NFDRPXJGHKJRLJ-UHFFFAOYSA-N 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 7
- YDONNITUKPKTIG-UHFFFAOYSA-N [Nitrilotris(methylene)]trisphosphonic acid Chemical compound OP(O)(=O)CN(CP(O)(O)=O)CP(O)(O)=O YDONNITUKPKTIG-UHFFFAOYSA-N 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 230000035484 reaction time Effects 0.000 claims description 3
- 230000005764 inhibitory process Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 3
- 241000668842 Lepidosaphes gloverii Species 0.000 abstract 1
- 229910021645 metal ion Inorganic materials 0.000 abstract 1
- 238000001556 precipitation Methods 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 23
- 239000003795 chemical substances by application Substances 0.000 description 11
- 239000000047 product Substances 0.000 description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 8
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 8
- 229910052799 carbon Inorganic materials 0.000 description 8
- 239000008367 deionised water Substances 0.000 description 8
- 229910021641 deionized water Inorganic materials 0.000 description 8
- 239000000126 substance Substances 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 5
- 239000002253 acid Substances 0.000 description 4
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 4
- DLEPCXYNAPUMDZ-UHFFFAOYSA-N butan-2-ylphosphonic acid Chemical compound CCC(C)P(O)(O)=O DLEPCXYNAPUMDZ-UHFFFAOYSA-N 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000005303 weighing Methods 0.000 description 4
- -1 3-triethoxysilylpropyl Chemical group 0.000 description 3
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- VWCFCFOIUSKKSC-UHFFFAOYSA-N ethane-1,2-diamine;2-hydroxy-1,3,2$l^{5}-dioxaphosphepane 2-oxide Chemical compound NCCN.OP1(=O)OCCCCO1 VWCFCFOIUSKKSC-UHFFFAOYSA-N 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- 239000001273 butane Substances 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000001027 hydrothermal synthesis Methods 0.000 description 2
- 239000003446 ligand Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 description 2
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 2
- 238000000053 physical method Methods 0.000 description 2
- 230000003405 preventing effect Effects 0.000 description 2
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 2
- UBXAKNTVXQMEAG-UHFFFAOYSA-L strontium sulfate Chemical compound [Sr+2].[O-]S([O-])(=O)=O UBXAKNTVXQMEAG-UHFFFAOYSA-L 0.000 description 2
- 230000002194 synthesizing effect Effects 0.000 description 2
- 229960001082 trimethoprim Drugs 0.000 description 2
- TUSDEZXZIZRFGC-UHFFFAOYSA-N 1-O-galloyl-3,6-(R)-HHDP-beta-D-glucose Natural products OC1C(O2)COC(=O)C3=CC(O)=C(O)C(O)=C3C3=C(O)C(O)=C(O)C=C3C(=O)OC1C(O)C2OC(=O)C1=CC(O)=C(O)C(O)=C1 TUSDEZXZIZRFGC-UHFFFAOYSA-N 0.000 description 1
- HXKKHQJGJAFBHI-UHFFFAOYSA-N 1-aminopropan-2-ol Chemical compound CC(O)CN HXKKHQJGJAFBHI-UHFFFAOYSA-N 0.000 description 1
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- QZPSOSOOLFHYRR-UHFFFAOYSA-N 3-hydroxypropyl prop-2-enoate Chemical compound OCCCOC(=O)C=C QZPSOSOOLFHYRR-UHFFFAOYSA-N 0.000 description 1
- AOJJSUZBOXZQNB-VTZDEGQISA-N 4'-epidoxorubicin Chemical compound O([C@H]1C[C@@](O)(CC=2C(O)=C3C(=O)C=4C=CC=C(C=4C(=O)C3=C(O)C=21)OC)C(=O)CO)[C@H]1C[C@H](N)[C@@H](O)[C@H](C)O1 AOJJSUZBOXZQNB-VTZDEGQISA-N 0.000 description 1
- QDRCGSIKAHSALR-UHFFFAOYSA-N 4-hydroxy-3-methoxybenzene-1-sulfonic acid Chemical compound COC1=CC(S(O)(=O)=O)=CC=C1O QDRCGSIKAHSALR-UHFFFAOYSA-N 0.000 description 1
- RKWGIWYCVPQPMF-UHFFFAOYSA-N Chloropropamide Chemical compound CCCNC(=O)NS(=O)(=O)C1=CC=C(Cl)C=C1 RKWGIWYCVPQPMF-UHFFFAOYSA-N 0.000 description 1
- PHOQVHQSTUBQQK-SQOUGZDYSA-N D-glucono-1,5-lactone Chemical compound OC[C@H]1OC(=O)[C@H](O)[C@@H](O)[C@@H]1O PHOQVHQSTUBQQK-SQOUGZDYSA-N 0.000 description 1
- 241001501111 Erycibe Species 0.000 description 1
- 239000001263 FEMA 3042 Substances 0.000 description 1
- 239000004277 Ferrous carbonate Substances 0.000 description 1
- MBMLMWLHJBBADN-UHFFFAOYSA-N Ferrous sulfide Chemical compound [Fe]=S MBMLMWLHJBBADN-UHFFFAOYSA-N 0.000 description 1
- LRBQNJMCXXYXIU-PPKXGCFTSA-N Penta-digallate-beta-D-glucose Natural products OC1=C(O)C(O)=CC(C(=O)OC=2C(=C(O)C=C(C=2)C(=O)OC[C@@H]2[C@H]([C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)O2)OC(=O)C=2C=C(OC(=O)C=3C=C(O)C(O)=C(O)C=3)C(O)=C(O)C=2)O)=C1 LRBQNJMCXXYXIU-PPKXGCFTSA-N 0.000 description 1
- 229920000805 Polyaspartic acid Polymers 0.000 description 1
- ULUAUXLGCMPNKK-UHFFFAOYSA-N Sulfobutanedioic acid Chemical compound OC(=O)CC(C(O)=O)S(O)(=O)=O ULUAUXLGCMPNKK-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 229910001870 ammonium persulfate Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 238000010668 complexation reaction Methods 0.000 description 1
- 238000005094 computer simulation Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 235000019268 ferrous carbonate Nutrition 0.000 description 1
- RAQDACVRFCEPDA-UHFFFAOYSA-L ferrous carbonate Chemical compound [Fe+2].[O-]C([O-])=O RAQDACVRFCEPDA-UHFFFAOYSA-L 0.000 description 1
- 229960004652 ferrous carbonate Drugs 0.000 description 1
- LRBQNJMCXXYXIU-QWKBTXIPSA-N gallotannic acid Chemical compound OC1=C(O)C(O)=CC(C(=O)OC=2C(=C(O)C=C(C=2)C(=O)OC[C@H]2[C@@H]([C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)O2)OC(=O)C=2C=C(OC(=O)C=3C=C(O)C(O)=C(O)C=3)C(O)=C(O)C=2)O)=C1 LRBQNJMCXXYXIU-QWKBTXIPSA-N 0.000 description 1
- 229960003360 guaiacolsulfonate Drugs 0.000 description 1
- 150000002462 imidazolines Chemical class 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910000015 iron(II) carbonate Inorganic materials 0.000 description 1
- 229910021506 iron(II) hydroxide Inorganic materials 0.000 description 1
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 1
- NCNCGGDMXMBVIA-UHFFFAOYSA-L iron(ii) hydroxide Chemical compound [OH-].[OH-].[Fe+2] NCNCGGDMXMBVIA-UHFFFAOYSA-L 0.000 description 1
- 229940102253 isopropanolamine Drugs 0.000 description 1
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 description 1
- 108010064470 polyaspartate Proteins 0.000 description 1
- 229920001529 polyepoxysuccinic acid Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 description 1
- VLDHWMAJBNWALQ-UHFFFAOYSA-M sodium;1,3-benzothiazol-3-ide-2-thione Chemical compound [Na+].C1=CC=C2SC([S-])=NC2=C1 VLDHWMAJBNWALQ-UHFFFAOYSA-M 0.000 description 1
- 230000007928 solubilization Effects 0.000 description 1
- 238000005063 solubilization Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229940033123 tannic acid Drugs 0.000 description 1
- 235000015523 tannic acid Nutrition 0.000 description 1
- 229920002258 tannic acid Polymers 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
- C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
- C02F5/12—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing nitrogen
- C02F5/125—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing nitrogen combined with inorganic substances
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
- C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
- C02F5/14—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing phosphorus
- C02F5/145—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing phosphorus combined with inorganic substances
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/10—Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Water Treatment By Sorption (AREA)
Abstract
The invention discloses a preparation method of an oilfield sewage treatment scale inhibitor, which comprises the following steps: dissolving citric acid and organic phosphonic acid containing nitrogen element in water to prepare a reaction solution; and heating the reaction liquid for reaction, performing centrifugal filtration, concentrating and drying filtrate to obtain the phosphorus doped nano carbon quantum dots, and completing the preparation. The carbon quantum dot formed by the method has stable property, simple components and long scale inhibition time, and can prevent metal ions in water from forming precipitation for a long time, so that the scale inhibition effect is realized.
Description
Technical Field
The invention relates to the technical field of scale inhibitors, in particular to an oilfield sewage treatment scale inhibitor and a preparation method thereof.
Background
In the oil field exploitation process, the produced water and the injected water contain Ca in different degrees 2+ 、Mg 2+ 、 Ba 2+ 、Sr 2+ 、CO3 2- 、SO4 2- The alike scale ions, as the external environment (temperature, pressure, etc.) changes, cause the formation, wellbore and surface lines to scale. Calcium carbonate scale, calcium sulfate scale, strontium sulfate scale, barium sulfate scale, etc. are common in oil fields, and corrosion products such as ferrous carbonate, ferrous sulfide, ferrous hydroxide, ferric oxide, and substances (such as sodium chloride) which have high solubility and high content and are easily separated out under certain conditions are also included. The scaling in the shaft causes serious scaling of part of the pump rod body of the production well, serious eccentric wear of the righting block of the injection molding rod, abrasion of the surface of the piston, serious eccentric wear scaling of the inner wall of the oil pipe, serious scaling of the tail pipe and the like, and seriously influences the service life of oil extraction equipment of an oil field. Scaling affects the stability and proper operation of oilfield production, and how to prevent scaling has become one of the important problems in oilfield development.
In the prior art, three scale prevention technologies used in oil fields are a physical method, a process method and a chemical method. The physical method is to use specific functions of physical instruments and equipment to inhibit scale formation, and ultrasonic waves, magnetic fields, vigilance techniques and the like are commonly used; the process is to destroy or reduce the chance of scale formation by changing or controlling certain process conditions; the chemical method is to add chemical antiscaling agent to prevent scale formation by utilizing the actions of complexation solubilization, dispersion, lattice distortion and the like of the antiscaling agent, and has the advantages of good effect, wide application range, flexible use and the like, and is widely applied to oil fields.
However, the existing scale inhibitor has the problems of unstable property and short acting time, and when in actual use, the scale inhibitor needs to be injected into an oil well every day, so that the labor cost is greatly increased. The related art is searched as follows:
patent number CN105152367A reports an environment-friendly oilfield reinjection water corrosion and scale inhibitor and a preparation method thereof, and belongs to the technical field of petroleum additives. The environment-friendly oilfield reinjection water corrosion and scale inhibitor is prepared from a caulis Erycibes extract, methyl dihydroarteannuate, citric acid, tannic acid, sodium mercaptobenzothiazole, gluconic acid-delta-lactone, guaiacolsulfonate, sulfosuccinate, N- (3-triethoxysilylpropyl) glucamide, ethyl acetate, ethanol and water as raw materials through a series of steps. The scale inhibitor has the advantages of troublesome preparation process, more required raw materials and poor stability.
Patent number CN109705831a reports an oilfield scale inhibitor comprising a first scale inhibitor, a second scale inhibitor, and a third scale inhibitor, the first scale inhibitor comprising: 8-10 parts of ethylenediamine tetramethylene phosphonic acid sodium, 5-8 parts of amino trimethylene phosphonic acid, 3-5 parts of hydroxyethylidene diphosphonic acid, 5-8 parts of 2-phosphonobutane, and 1,2, 4-tricarboxylic acid; the second scale inhibitor comprises: 15-20 parts of maleic anhydride, 5-10 parts of acrylic acid, 5-8 parts of hydroxypropyl acrylate and 0.5-1 part of ammonium persulfate; the third scale inhibitor comprises: 10 to 12 parts of polyepoxysuccinic acid, 8 to 10 parts of polyaspartic acid, 5 to 8 parts of modified imidazolines, 0.5 to 1 part of modified quaternary ammonium salt and 0.05 to 0.1 part of sodium polyacrylate. The scale inhibitor is troublesome in preparation process, more in needed raw materials and poor in stability.
The existing scale inhibitor has the problems of unstable property and short acting time, and the development of the scale inhibitor with stable property and long acting time is necessary to solve the problem of damage to oil extraction equipment caused by scale formation of a shaft.
Disclosure of Invention
The invention provides a scale inhibitor with stable property and long action time, which comprises the following specific technical scheme:
the preparation method of the scale inhibitor for oilfield sewage treatment comprises the following steps:
dissolving citric acid and organic phosphonic acid containing nitrogen element in water to prepare a reaction solution; and heating the reaction liquid for reaction, performing centrifugal filtration, concentrating and drying filtrate to obtain the phosphorus doped nano carbon quantum dots, and completing the preparation.
Preferably, the organic phosphonic acid is at least one of amino trimethylene phosphonic acid, ethylenediamine tetramethylene phosphonic acid and diethylenetriamine pentamethylene phosphonic acid.
Preferably, the mass ratio of the citric acid to the organic phosphonic acid containing nitrogen element is 1:0.5-1.
Preferably, the reaction solution is heated to 180-280 ℃.
Preferably, the reaction time of heating is 3 to 8 hours.
Preferably, the method further comprises the following steps: adding the prepared phosphorus doped nano carbon quantum dots into hydroxyethylidene diphosphonic acid or 2-phosphonate butane-1, 2, 4-tricarboxylic acid, adding water, stirring, and then heating for reaction to complete the preparation.
Preferably, the heating reaction temperature is 50 to 80 ℃.
Preferably, the heating reaction is carried out for a period of 10 to 15 minutes.
The preparation method provided has the following technical effects:
citric acid is a carbon source for synthesizing carbon quantum dots, organic phosphonic acid containing nitrogen is mainly used for providing a nitrogen source to react as the nitrogen source, phosphonic acid is selected to be doped with phosphorus on the surface of the carbon dots, and the phosphoric acid and the carbon source react to generate the phosphorus doped nano carbon quantum dots under the conditions of high temperature and high pressure.
Preferably, the organic phosphoric acid is at least one of amino trimethylene phosphonic acid, ethylenediamine tetramethylene phosphonic acid and diethylenetriamine pentamethylene phosphonic acid, and the selection range is wide.
Preferably, the mass ratio is defined to be 1:0.5-1, so that the surface of the carbon dot is doped with P as much as possible, and the element ratio can reach 20% optimally according to element scanning analysis, so that the property of the product is stable.
Preferably, the reaction solution is heated to 180-280 ℃, the hydrothermal method is required to prepare the carbon quantum dots at 180 ℃ or above, and the excessive temperature can possibly react to generate other substances, so that the upper temperature limit of 280 ℃ is set.
Preferably, the yield of carbon points below 3h is reduced, while above 8h does not increase the yield and increases the energy consumption.
Preferably, the carbon quantum dots are combined with hydroxyethylidene diphosphonic acid or 2-phosphonic butane-1, 2, 4-tricarboxylic acid, the hydroxyethylidene diphosphonic acid or 2-phosphonic butane-1, 2, 4-tricarboxylic acid can be chelated with the carbon quantum dots, unstable ligands can be formed on the surfaces of the hydroxyethylidene diphosphonic acid or 2-phosphonic butane, slow release is realized, and meanwhile, the scale preventing effect can be further enhanced.
Detailed Description
The following detailed description of the invention refers to the accompanying drawings, which illustrate specific embodiments of the invention, and are therefore not to be taken as limiting the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention provides a preparation method of an oilfield sewage treatment scale inhibitor, which comprises the following steps:
dissolving citric acid and organic phosphonic acid containing nitrogen element in water to prepare a reaction solution; and heating the reaction liquid for reaction, performing centrifugal filtration, concentrating and drying filtrate to obtain the phosphorus doped nano carbon quantum dots, and completing the preparation.
Citric acid is a carbon source for synthesizing carbon quantum dots, organic phosphonic acid containing nitrogen is mainly used for providing a nitrogen source to react as the nitrogen source, phosphonic acid is selected to be doped with phosphorus on the surface of the carbon dots, and the phosphoric acid and the carbon source react to generate the phosphorus doped nano carbon quantum dots under the conditions of high temperature and high pressure.
Wherein the organic phosphonic acid is at least one of amino trimethylene phosphonic acid, ethylenediamine tetramethylene phosphonic acid and diethylenetriamine pentamethylene phosphonic acid.
The organic phosphoric acid is at least one of amino trimethylene phosphonic acid, ethylenediamine tetramethylene phosphonic acid and diethylenetriamine pentamethylene phosphonic acid, and has wide selection range.
Preferably, the mass ratio of the citric acid to the organic phosphonic acid containing nitrogen element is 1:0.5-1.
The mass ratio is limited to be 1:0.5-1, so that the surface of a carbon dot is doped with P as much as possible, and the element ratio can reach 20% optimally according to element scanning analysis, so that the property of a product is stable.
Preferably, the reaction solution is heated to 180-280 ℃.
The reaction solution is heated to 180-280 ℃, the preparation of the carbon quantum dots by a hydrothermal method is carried out at 180 ℃ or above, and other substances possibly generated by the reaction can be generated due to the excessive temperature, so that the upper temperature limit of 280 ℃ is set.
And heating for 3-8 hr. The yield of carbon points below 3h is reduced, while the yield is not improved by the above 8h, and the energy consumption is increased.
The method also comprises the following steps: adding the prepared phosphorus doped nano carbon quantum dots into hydroxyethylidene diphosphonic acid or 2-phosphonate butane-1, 2, 4-tricarboxylic acid, adding water, stirring, and then heating for reaction to complete the preparation.
The carbon quantum dot is combined with hydroxyethylidene diphosphonic acid or 2-phosphonic butane-1, 2, 4-tricarboxylic acid, the hydroxyethylidene diphosphonic acid or 2-phosphonic butane-1, 2, 4-tricarboxylic acid can be chelated with the carbon quantum dot, an unstable ligand can be formed on the surface of the carbon quantum dot in the hydroxyethylidene diphosphonic acid or 2-phosphonic butane, slow release is realized, and meanwhile, the scale preventing effect can be further enhanced.
Specific examples of several embodiments are as follows:
example 1
An antiscaling agent for oilfield sewage treatment is prepared by the following method:
dissolving citric acid and amino trimethophosphoric acid with the mass ratio of 1:1 into deionized water to prepare a reaction solution with the mass concentration of 10% of citric acid; and heating the reaction solution to 180 ℃ for reaction for 8 hours, and then performing centrifugal filtration, concentrating and drying the filtrate to obtain the phosphorus doped nano carbon quantum dot serving as a product A.
Example 2
An antiscaling agent for oilfield sewage treatment is prepared by the following method:
dissolving citric acid and amino trimethoprim acid with the mass ratio of 1:0.5 into deionized water to prepare a reaction solution with the mass concentration of 10% of citric acid; and heating the reaction solution to 280 ℃ for reaction for 3 hours, and then performing centrifugal filtration, concentrating and drying the filtrate to obtain the phosphorus doped nano carbon quantum dot as a product B.
Example 3
An antiscaling agent for oilfield sewage treatment is prepared by the following method:
dissolving citric acid and amino trimethophosphoric acid with the mass ratio of 1:0.8 into deionized water to prepare a reaction solution with the mass concentration of 10% of citric acid; and heating the reaction solution to 220 ℃ for reaction for 5 hours, and then performing centrifugal filtration, concentrating and drying the filtrate to obtain the phosphorus doped nano carbon quantum dot as a product C.
Example 4
An antiscaling agent for oilfield sewage treatment is prepared by the following method:
dissolving citric acid and ethylenediamine tetramethylene phosphonic acid with a mass ratio of 1:1 into deionized water to prepare a reaction solution with a mass concentration of 10% of citric acid; and heating the reaction solution to 250 ℃ for reaction for 6 hours, and then performing centrifugal filtration, concentrating and drying the filtrate to obtain the phosphorus doped nano carbon quantum dot as a product D.
Example 5
An antiscaling agent for oilfield sewage treatment is prepared by the following method:
s11) dissolving citric acid and amino trimethoprim acid with the mass ratio of 1:0.8 into deionized water to prepare a reaction solution with the mass concentration of 10% of citric acid;
and S12) heating the reaction liquid to 220 ℃ for reaction for 5 hours, and performing centrifugal filtration, concentrating and drying the filtrate to obtain the phosphorus doped nano carbon quantum dot.
S2) weighing the phosphorus-doped nano carbon quantum dots and the 2-phosphonobutane according to the mass ratio of the phosphorus-doped nano carbon quantum dots to the 2-phosphonobutane of 1:0.3, adding the weighed phosphorus-doped nano carbon quantum dots into the 2-phosphonobutane, adding water, stirring, heating to 50 ℃, and reacting for 15min to obtain a product E.
Example 6
An antiscaling agent for oilfield sewage treatment is prepared by the following method:
s11) dissolving citric acid and ethylenediamine tetramethylene phosphate with the mass ratio of 1:0.8 into deionized water to prepare a reaction solution with the mass concentration of the citric acid of 10%;
s12) heating the reaction solution to 220 ℃ for reaction for 5 hours, and performing centrifugal filtration, concentrating and drying filtrate to obtain the phosphorus doped nano carbon quantum dot;
s2) weighing the phosphorus-doped nano carbon quantum dots and the hydroxyethylidene diphosphonic acid according to the mass ratio of the phosphorus-doped nano carbon quantum dots to the hydroxyethylidene diphosphonic acid of 1:0.15, adding the weighed phosphorus-doped nano carbon quantum dots into isopropanolamine, adding water, stirring, heating to 80 ℃ and reacting for 10min to obtain a product F.
Example 7
An antiscaling agent for oilfield sewage treatment is prepared by the following method:
s11) dissolving citric acid and ethylenediamine tetramethylene phosphate with the mass ratio of 1:0.8 into deionized water to prepare a reaction solution with the mass concentration of the citric acid of 10%;
s12) heating the reaction solution to 220 ℃ for reaction for 5 hours, and performing centrifugal filtration, concentrating and drying filtrate to obtain the phosphorus doped nano carbon quantum dot;
s2) weighing the phosphorus-doped nano carbon quantum dots and the hydroxyethylidene diphosphonic acid according to the mass ratio of the phosphorus-doped nano carbon quantum dots to the hydroxyethylidene diphosphonic acid of 1:0.2, adding the weighed phosphorus-doped nano carbon quantum dots into the hydroxyethylidene diphosphonic acid, adding water, stirring, heating to 60 ℃ and reacting for 12min to obtain a product G.
Example 8
An antiscaling agent for oilfield sewage treatment is prepared by the following method:
s11) dissolving citric acid and ethylenediamine tetramethylene phosphate with the mass ratio of 1:1 into deionized water to prepare a reaction solution with the mass concentration of 10% of citric acid;
s12) heating the reaction solution to 250 ℃ for reaction for 6 hours, and performing centrifugal filtration, concentrating and drying filtrate to obtain the phosphorus doped nano carbon quantum dot;
s2) weighing the phosphorus-doped nano carbon quantum dots and the hydroxyethylidene diphosphonic acid according to the mass ratio of the phosphorus-doped nano carbon quantum dots to the hydroxyethylidene diphosphonic acid of 1:0.2, adding the weighed phosphorus-doped nano carbon quantum dots into the hydroxyethylidene diphosphonic acid, adding water, stirring, heating to 60 ℃ and reacting for 12min to obtain a product H.
Diluting the water quality stabilizer prepared by the method into a solution of 10mg/L by using water, then adding the solution into flowing oilfield reinjection water, and performing a dynamic simulation experiment and a scale inhibition experiment, wherein the test results are as follows:
one month after the anti-scaling agent is adopted, the pipeline of oilfield reinjection water is inspected, and the scaling condition is observed, wherein the scaling condition is as follows:
the scale inhibition rate can reach more than 90%, the maintenance time is long, the stability of the scale inhibitor can be proved, and further the defect of high cost caused by the fact that more scale inhibitor needs to be added in the prior art can be avoided.
In other embodiments, the organic phosphonic acid is replaced by diethylenetriamine penta-methylene phosphonic acid, or a mixture of amino-trimethyl-ethylene-diamine-tetramethyl-ethylene-methylene-phosphonic acid and diethylenetriamine-penta-methylene-phosphonic acid, and the scale inhibition rate can reach more than 90% and the maintenance time is longer.
The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention, the scope of which is defined by the claims. Various modifications and equivalent substitutions of the invention will occur to those skilled in the art, which are within the spirit and scope of the invention.
Claims (9)
1. The preparation method of the scale inhibitor for oilfield sewage treatment is characterized by comprising the following steps:
dissolving citric acid and organic phosphonic acid containing nitrogen element in water to prepare a reaction solution; and heating the reaction liquid for reaction, performing centrifugal filtration, concentrating and drying filtrate to obtain the phosphorus doped nano carbon quantum dots, and completing the preparation.
2. The method for preparing an oilfield sewage treatment scale inhibitor according to claim 1, wherein the organic phosphonic acid is at least one of aminotrimethylene phosphonic acid, ethylenediamine tetramethylene phosphonic acid, and diethylenetriamine pentamethylene phosphonic acid.
3. The method for preparing an oilfield sewage treatment scale inhibitor according to claim 1, wherein the mass ratio of the citric acid to the organic phosphonic acid containing nitrogen element is 1:0.5-1.
4. The method for producing an oilfield sewage treatment scale inhibitor according to claim 1, wherein the reaction solution is heated to 180-280 ℃.
5. The method for preparing an oilfield sewage treatment scale inhibitor according to claim 1, wherein the heating reaction time is 3-8 hours.
6. The method for preparing an oilfield sewage treatment scale inhibitor according to claim 1, further comprising the steps of: adding the prepared phosphorus doped nano carbon quantum dots into hydroxyethylidene diphosphonic acid or 2-phosphonate butane-1, 2, 4-tricarboxylic acid, adding water, stirring, and then heating for reaction to complete the preparation.
7. The method for preparing an oilfield sewage treatment scale inhibitor according to claim 6, wherein the heating reaction temperature is 50-80 ℃.
8. The method for preparing an oilfield sewage treatment scale inhibitor according to claim 6, wherein the heating reaction time is 10-15min.
9. An oilfield sewage treatment scale inhibitor, characterized in that the scale inhibitor is prepared by the preparation method of claims 1-8.
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