CN102701468A - Maleic anhydride (MA)-2-acrylamide-2-methyl propane sulfonic acid (AMPS) copolymer and imidazoline compounding type corrosion and scale inhibitor - Google Patents

Maleic anhydride (MA)-2-acrylamide-2-methyl propane sulfonic acid (AMPS) copolymer and imidazoline compounding type corrosion and scale inhibitor Download PDF

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CN102701468A
CN102701468A CN2012102091862A CN201210209186A CN102701468A CN 102701468 A CN102701468 A CN 102701468A CN 2012102091862 A CN2012102091862 A CN 2012102091862A CN 201210209186 A CN201210209186 A CN 201210209186A CN 102701468 A CN102701468 A CN 102701468A
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corrosion
scale
scale inhibitor
inhibition
amps
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刘晓艳
顾婷
邹君臣
魏静
苏鹏程
戴春雷
柴文波
钱昊
陈雯
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University of Shanghai for Science and Technology
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University of Shanghai for Science and Technology
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Abstract

The invention relates to a scale inhibitor maleic anhydride (MA)/2-acrylamide-2-methyl propane sulfonic acid (AMPS) copolymer and imidazoline compounding type corrosion and scale inhibitor. The corrosion and scale inhibitor belongs to a green environment-friendly corrosion and scale inhibitor capable of being used for an oil field water injection system, and the corrosion inhibition effect can reach 90.42 percent. The consumption of the product is low, the cost is low, the effect is good, the corrosion and scale inhibitor has the characteristics of no phosphorus and high biological degradability and belongs to an environment-friendly oil field water treatment agent, and double effects of corrosion inhibition and scale inhibition can be realized. The corrosion and scale inhibitor has the advantages that the six-hour scale inhibition rate can reach more than 90 percent, the corrosion inhibition rate reaches more than 90 percent, the corrosion rate is only 0.0552 mm/a, the QSY126-2005 standard requirement (lower than 0.0760 mm/a) is met, the corrosion and scale inhibitor is applicable to corrosion and scale inhibitors of an oil field water delivery pipeline system, and wide application prospects are realized.

Description

MA-AMPS multipolymer and tetrahydroglyoxaline Compositional type corrosion inhibiting and descaling agent
Technical field
The present invention relates to a kind of oil field and use corrosion inhibiting and descaling agent, particularly a kind of MA-AMPS multipolymer and tetrahydroglyoxaline Compositional type corrosion inhibiting and descaling agent.
Background technology
The place of every use metallic substance, all therefore the etching problem of various degrees always exists the corrosive problem in the large scale mining system of oil.And along with ternary compound oil drive and the technological popularization of polymer flooding oil-extraction; The scale formation of whole oil production system also is on the rise; Cause like oil well pump through regular meeting be stuck, annular space is blocked between well casing and the sucker rod, the internal diameter of gathering line falls sharply even by problems such as serious obstructions, seriously influenced normally carrying out of field produces.In addition, if frequent workover treatment and replacing pipeline not only can influence ordinary production, and cause huge waste.
In order to solve fouling and etching problem; The most directly mode is exactly to add Scale inhibitors and inhibiter respectively; So not only increase cost and operation element amount, but also the phenomenon that antagonistic action takes place each other for Scale inhibitors and inhibiter possibly take place, influenced the solution of fouling and etching problem.
Summary of the invention
The object of the present invention is to provide a kind of MA-AMPS multipolymer and tetrahydroglyoxaline Compositional type corrosion inhibiting and descaling agent, to solve and to overcome the fouling and the etching problem of oil field flood pattern simultaneously.
A kind of inhibiter that imidazoline inhibitor is used by domestic and international most of oil fields has low toxicity, high biological degradability, to skin and eyes nonirritant and stable existence in medium.It has good corrosion inhibition for general corrosions in acidic medium such as carbon steel, steel alloy, copper Huang, copper aluminium, duraluminums; This type inhibiter does not have special irritating smell, Heat stability is good, and toxicity is low, anti-H 2S/CO 2The corrosive corrosion inhibition is good.
The MA-AMPS multipolymer, it is a kind of green scale inhibitor of without phosphorus, readily biodegradable.Be a kind of Scale inhibitorss without phosphorus, these green advantages of readily biodegradable that have.It is to CaCO 3And CaSO 4Dirt all has higher scale inhibition efficient, and has certain corrosion inhibition concurrently;
For achieving the above object, the present invention adopts following technical scheme:
A kind of MA-AMPS multipolymer and tetrahydroglyoxaline Compositional type corrosion inhibiting and descaling agent, the mass ratio that it is characterized in that this corrosion inhibiting and descaling agent tetrahydroglyoxaline and MA-AMPS is 6 ~ 10: 40 ~ 60.
Above-mentioned corrosion inhibiting and descaling agent tetrahydroglyoxaline and the mass ratio of MA-AMPS are 8:50.
Corrosion experiment material of the present invention is a Q235 carbon steel standard steel disc, and specification is 50mm * 25mm * 2mm, and each lacing film is drilled with aperture that the aperture the is about 3mm usefulness in order to lacing film.
Corrosion inhibiting and descaling agent of the present invention is a kind of environmental type corrosion inhibiting and descaling agent that can be used for oil field flood pattern, and inhibition efficiency can reach 90.42%; This product consumption is few, cost is low, effective, have characteristics without phosphorus, high biological degradability, be a kind of environmentally friendly oil-field water treatment agent, but play not only inhibition but also dual function that can scale inhibition.This product 6h scale inhibition performance can reach more than 90%, and corrosion inhibition rate reaches more than 90%, and corrosion rate is 0.0552mm/a only, < 0.0760 mm/>a of accord with Q SY126-2005 standard-required; Be applicable to inhibition, Scale inhibitors, have broad prospect of application as oil field water-transmission line system.
Patent of the present invention is to utilize maleic anhydride (MA)/2-acrylic amide-2-methyl-propyl sulfonic acid (AMPS) copolymer antisludging agent and imidazoline inhibitor to carry out composite; Develop a kind of novel corrosion-retarding-Scale inhibitors of environmental protection, can be used in the production process of oil field water-transmission line system with inhibition and scale inhibition dual function.
Description of drawings
Composite dose of Fig. 1 different ratios at different time to CaCO 3The scale inhibition efficient of dirt
Composite dose of Fig. 2 different ratios at different time to CaSO 4The scale inhibition efficient of dirt
Fig. 3 uses the corrosion inhibition of different concns MA-AMPS separately
Fig. 4 uses the corrosion mitigating effect figure of different concns tetrahydroglyoxaline separately
The corrosion mitigating effect figure of compound drug and tetrahydroglyoxaline under Fig. 5 different time.
Embodiment
This multipolymer of MA-AMPS multipolymer that the present invention adopts is to be that reactant obtains polymerization single polymerization monomer with maleic anhydride MA and 2-acrylic amide-2-methyl propane sulfonic acid AMPS, the linear copolymer that forms through polyreaction again, and wherein two-part mass ratio is 9.8:10.35.Concrete preparation process is:
(1) the 9.8g maleic anhydride is dissolved in the 30ml deionized water, adds 10.35g2-acrylic amide-2-methyl propane sulfonic acid, react 3 ~ 3.5h down at 85 ℃ ~ 95 ℃;
(2) temperature is controlled at 40 ℃ ~ 55 ℃ NaOH aqueous solution that slowly add 11ml 50%; Be warmed up to 55 ~ 60 ℃; Press 1.7% of monomer total mass and add sodium wolframate, behind the reaction 0.5h, slowly drip 78% hydrogen peroxide of monomer total mass; Epoxidation reaction 1.5h is carried out in regulator solution pH to 5 ~ 7 under 70 ℃;
(3) be warming up to 80 ~ 90 ℃, add 15% ~ 20% polymerizing agent Potassium Persulphate of monomer total mass, polyreaction 1 ~ 2h promptly makes copolymer MA-AMPS bullion, then through filter purify copolymer MA-AMPS.
The scale-inhibiting properties testing method that the present invention adopts is following:
Use a certain amount of CaCl 2With a certain amount of Na 2CO 3/ Na 2SO 4Reaction forms CaCO 3/ CaSO 4Form CaCO in its reaction 3/ CaSO 4Before the deposition, in solution, add the Scale inhibitors of different amounts, constant temperature leaves standstill certain hour, with Ca in the clear liquor of EDTA titration measuring top 2+Content, the scale inhibition performance of calculating Scale inhibitors.
Resistance CaCO 3The performance test concrete steps of dirt are: get 200ml zero(ppm) water in the 250mL volumetric flask, accurately add 6.00mL 11.09g/L CaCl 2Solution accurately adds a certain amount of Scale inhibitors solution, adds 6.00mL11.10g/LNa again 2CO 3Solution, adding distil water is diluted to scale, shakes up, and above-mentioned solution is packed in the 250mL polyethylene bottle.In 50 ± 1 ℃ of air blast thermostat containers behind the constant temperature 10h; Each polyethylene bottle taking-up is left standstill to room temperature,, accurately get filtrating 25.00mL in clean triangular flask with transfer pipet then with middling speed filter paper filtering solution; Add 50mL zero(ppm) water; Transfer pH=12 ~ 13 with 10% sodium hydroxide solution, add the 0.2g calconcarboxylic acid again, with the titration of the EDTA standardized solution of 0.0050mol/L.
Resistance CaSO 4The performance test concrete steps of dirt are: get 200ml zero(ppm) water in the 250mL volumetric flask, accurately add 25.00mL 83.25g/L CaCl 2Solution accurately adds a certain amount of Scale inhibitors solution, adds 25.00mL 108.5g/LNa again 2SO 4Solution, adding distil water is diluted to scale, shakes up, and above-mentioned solution is packed in the 250mL polyethylene bottle.After in 50 ± 1 ℃ of water-baths, leaving standstill 6h, each polyethylene bottle taking-up is left standstill to room temperature, with middling speed filter paper filtering solution; Accurately get filtrating 25.00mL in clean triangular flask with transfer pipet then; When adding the 50mL distillation, the NaOH solution with 10% is transferred about pH=10, adds 5mL 50%NH 3H 2O adds the 0.2g calconcarboxylic acid again, with the titration of the EDTA standardized solution of 0.050mol/L.
The corrosive nature testing method that the present invention adopts is following:
At RCC-
Figure 702827DEST_PATH_IMAGE001
On the type rotary hanging plate corrosion test instrument, the Q235 carbon steel test specimen of standard is fixed on the test piece frame, puts into and be added with test inhibiter and corrosive water (saturated CO 2The salts solution of coexistence, wherein 3%NaCl, 0.12%MgCl 26H 2O, 0.36%NaSO 4, 0.24%CaCl 2, 0.024%NaHCO 3) test glass in, test glass places 50 ℃ water bath with thermostatic control, the test solution spontaneous evaporation stops test behind the 48h, calculate corrosion rate and corrosion inhibition rate by following formula:
Figure 525289DEST_PATH_IMAGE002
Figure 228541DEST_PATH_IMAGE003
In the formula, r CorrBe uniform corrosion speed, mm/; M is the preceding test piece quality of test, g; m tBe the test piece quality after the test, g; S tBe the total area of test piece, cm 2ρ is the density of test piece material, g/cm 3T-test period, h; η 1-corrosion inhibition rate, %; Δ m 0Be the mass loss of test piece in the blank test, g; Δ m 1Be the mass loss of test piece in the dosing test, g.
Medicament maleic anhydride, sodium hydroxide, hydrogen peroxide, Potassium Persulphate, calcium chloride, sodium-chlor, yellow soda ash, SODIUM SULPHATE ANHYDROUS 99PCT, magnesium chloride, absolute ethyl alcohol, sodium wolframate that embodiment and Comparative Examples are used all derive from Chemical Reagent Co., Ltd., Sinopharm Group; The medicament 2 – acryloyl amido – 2 – methyl propane sulfonic acids that embodiment and Comparative Examples are used derive from Henan Qingshuiyuan Technology Co., Ltd.; The medicament calcium carboxylates that embodiment and Comparative Examples are used derives from Aladdin reagent (Shanghai) Co., Ltd..
Embodiment 1 ~ 5: composite dose of different ratios at different time to Ca 2CO 3The scale inhibition effect of dirt
Embodiment 1 is not for adding composite agent solution, the blank solution 1 that obtains; Comparative Examples 2 is not for adding Na 2CO 3Solution and composite agent solution, the blank solution 2 that obtains; Embodiment 3 ~ 5 is for adding the scale inhibition effect that compound drug strength of solution ratio is respectively 50:6,50:8,50:10.The experimental result of gained is seen Fig. 1, and adding for the MA-AMPS multipolymer of tetrahydroglyoxaline hinders Ca 2CO 3The scale-inhibiting properties of dirt is not influence almost, and the influence in time of its scale inhibition performance constantly descends, during 6 h to Ca 2CO 3After can being higher than 92%, 22 h, the scale inhibition efficient of dirt still can reach 75%.
Embodiment 6 ~ 10: composite dose of different ratios at different time to CaSO 4The scale inhibition effect of dirt
Embodiment 6 is not for adding composite agent solution, the blank solution 1 ' that obtains; Embodiment 7 is not for adding Na 2SO 4Solution and composite agent solution, the blank solution 2 ' that obtains; Embodiment 8 ~ 10 is respectively the scale inhibition effect of 50:6,50:8,50:10 for the compound drug concentration ratio that adds.The experimental result of gained is seen Fig. 2, and adding for the MA-AMPS multipolymer of tetrahydroglyoxaline hinders CaSO 4The scale-inhibiting properties of dirt has certain influence, and the tetrahydroglyoxaline proportion is high more, the resistance CaSO of compound drug 4The dirt performance is good more, along with change of time, and compound drug resistance CaSO 4The performance of dirt constantly reduces, but still can reach more than 86% behind 22 h.
Embodiment 11 ~ 16: the corrosion mitigating effect that uses the MA-AMPS multipolymer separately
Embodiment 11 is not for adding the autogamy corrosive water solution of inhibiter MA-AMPS, the blank that obtains; Embodiment 12 ~ 16 for the inhibiter MA-AMPS concentration that in autogamy corrosive water solution, adds is respectively 10,20,30,40, during 50mg/L to the corrosion mitigating effect of Q235 steel disc.The gained experimental result is seen Fig. 1, uses the inhibition efficiency of MA-AMPS not high separately, can not satisfy the demand that central inhibition of practical application and scale-inhibiting properties have both.
Embodiment 17 ~ 22: the corrosion mitigating effect that uses tetrahydroglyoxaline separately
Embodiment 17 is not for adding the autogamy corrosive water solution of inhibiter MA-AMPS, the blank that obtains; Embodiment 18 ~ 22 is respectively 2,4,6,8 in autogamy corrosive water solution, adding inhibiter tetrahydroglyoxaline concentration, the corrosion mitigating effect of 10mg/L.The gained experimental result is seen Fig. 2, and tetrahydroglyoxaline adds when dosage is merely 2mg/L just can obtain higher corrosion inhibition rate, and when dosage was 8mg/L, corrosion inhibition rate can reach more than 86%, and corrosion rate is merely 0.0696 mm/a.
Embodiment 23 ~ 26: the corrosion mitigating effect of the composite MA-AMPS multipolymer of tetrahydroglyoxaline of the present invention
Embodiment 23 is not for adding any reagent, the blank etchant solution that obtains; Embodiment 24 ~ 26 in etchant solution fixedly the concentration that adds of tetrahydroglyoxaline be 8mg/L, the MA-AMPS multipolymer add that concentration is respectively 40,50, the corrosion mitigating effect during 60mg/L to the Q235 steel disc.Research obtains
The compound proportion of tetrahydroglyoxaline and MA-AMPS is that corrosion inhibition rate reaches 90.42% under the condition of 8:50, and corrosion rate has only 0.0552 mm/a, test piece outward appearance justifying light, and effect is fine.
Embodiment 27 ~ 28: the corrosion mitigating effect of compound drug under the different time
Embodiment 27 is not for adding any reagent, the blank etchant solution that obtains; Embodiment 28 is at the corrosion mitigating effect of 12,24,48,72,96,120 h to the Q235 steel disc when in etchant solution, adding composite dose.
Comparative Examples 29: the corrosion mitigating effect of tetrahydroglyoxaline under the different time
Comparative Examples 29 is at the corrosion mitigating effect of 12,24,48,72,96,120 h to the Q235 steel disc when in etchant solution, adding tetrahydroglyoxaline.The gained experimental result is seen Fig. 5.
This shows; Be enhanced before the corrosion inhibition of the composite MA-AMPS inhibiter of tetrahydroglyoxaline of the present invention under the same conditions is more composite; Exist inhibition-scale inhibition synergy between two kinds of medicaments; Its inhibition efficiency was 90.42% when the concentration of adding MA-AMPS reached 50mg/L in the etchant solution that contains the 8mg/L tetrahydroglyoxaline, and corrosion rate is merely 0.0552mm/a, < the 0.0760 mm/>a standard value that conformance with standard QSY126-2005 requires.Therefore the compound prescription of the present invention's development has good inhibition and scale inhibition effect.That the present invention has is without phosphorus, the characteristics of high biological degradability; It is a kind of environmentally friendly oil-field water treatment agent; Be applicable to oil field water-transmission line system, but can play good not only inhibition but also dual function that can scale inhibition, have wide oil field industrial market application prospect.

Claims (2)

1. MA-AMPS multipolymer and tetrahydroglyoxaline Compositional type corrosion inhibiting and descaling agent, the mass ratio that it is characterized in that this corrosion inhibiting and descaling agent tetrahydroglyoxaline and MA-AMPS is 6 ~ 10: 40 ~ 60.
2. according to described MA-AMPS multipolymer of claim and tetrahydroglyoxaline Compositional type corrosion inhibiting and descaling agent, the mass ratio that it is characterized in that this corrosion inhibiting and descaling agent tetrahydroglyoxaline and MA-AMPS is 8:50.
CN2012102091862A 2012-06-25 2012-06-25 Maleic anhydride (MA)-2-acrylamide-2-methyl propane sulfonic acid (AMPS) copolymer and imidazoline compounding type corrosion and scale inhibitor Pending CN102701468A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103864233A (en) * 2014-02-19 2014-06-18 安徽大学 Environment-friendly water treatment agent and preparation method thereof
CN111533287A (en) * 2020-04-28 2020-08-14 爱环吴世（苏州）环保股份有限公司 Non-phosphorus scale and corrosion inhibitor and preparation method thereof

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003018708A2 (en) * 2001-08-10 2003-03-06 Cabot Specialty Fluids, Inc. Alkali metal tungstate compositions and uses thereof
CN101671552A (en) * 2009-09-28 2010-03-17 大庆油田有限责任公司 Silicate scale clearing agent for ternary combination flooding extraction well
CN102250604A (en) * 2011-05-27 2011-11-23 门正国 Controlled releasing microcapsule for scale prevention, wax prevention or viscosity reduction of oil well

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003018708A2 (en) * 2001-08-10 2003-03-06 Cabot Specialty Fluids, Inc. Alkali metal tungstate compositions and uses thereof
CN101671552A (en) * 2009-09-28 2010-03-17 大庆油田有限责任公司 Silicate scale clearing agent for ternary combination flooding extraction well
CN102250604A (en) * 2011-05-27 2011-11-23 门正国 Controlled releasing microcapsule for scale prevention, wax prevention or viscosity reduction of oil well

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
荆国华 等: "MA-AMPS共聚物的制备及其性能研究", 《水处理技术》 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103864233A (en) * 2014-02-19 2014-06-18 安徽大学 Environment-friendly water treatment agent and preparation method thereof
CN103864233B (en) * 2014-02-19 2016-04-06 安徽大学 A kind of Environment-friendlywater water treatment agent and preparation method thereof
CN111533287A (en) * 2020-04-28 2020-08-14 爱环吴世（苏州）环保股份有限公司 Non-phosphorus scale and corrosion inhibitor and preparation method thereof

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