CN103113584A - Three compound combination flooding adopted environment-friendly preparation method of polyaspartic acid for oil field - Google Patents
Three compound combination flooding adopted environment-friendly preparation method of polyaspartic acid for oil field Download PDFInfo
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Abstract
The invention relates to a three compound combination flooding adopted environment-friendly preparation method of polyaspartic acid for an oil field, and relates to the field of preparation of the polyaspartic acid. The PASP (Polyaspartic Acid) is synthesized through polymerization reaction by taking carboxylic acid anhydride, organic acid, an aminating agent, a hydrolytic agent, a purifying agent and a washing agent as raw materials. According to the invention, the yield of the polyaspartic acid is 90%, the purity of the polyaspartic acid is 98%, and the polyaspartic acid is prepared as a biological scale preventing and inhibiting agent by polymerizing by adopting solid material double-spiral extrusion kneading equipment; and the preparation method disclosed by the invention has the advantages of simple production process, low energy consumption, no discharge of three wastes, continuous industrialized production, high transformation ratio, and the like and is applied to the field of scale prevention and inhibition of the oil field.
Description
Technical field
The present invention relates to the preparation field of poly aspartic acid.
Background technology
Ternary composite driving is to propose by abroad taking the lead in early 1980s, and it is the tertiary oil recovery new technology that grows up on the basis of Surfactant/Polymer binary combination flooding, alkali/polymkeric substance binary combination flooding.Ternary composite driving has embodied a concentrated reflection of surfactant flooding, and alkali drives and the feature of polymer flooding, has given full play to again the synergy between the three, has fully improved various chemical agent efficient, and decrease the chemical agent consumption of tensio-active agent especially.Due to the introducing of sodium carbonate, there is serious scale formation in injected system.It is inner that the filter screen, injection pump, ground that a large amount of carbonate scales is deposited on Alkali liquid compounding tank (alkali pond), liquid caustic soda storage tank, strainer injects the facility such as pipeline.Due to the existence of fouling situation, strainer, injection pump valve group will be changed once every 1～February, and injection pump is also often shut down because of fouling, and annual pump increases because of dirty maintenance cost; Inject the pipeline internal diameter and dwindle, injection pressure increases, and has affected the circulation of liquid, Weak Base ASP Flood occurred and has injected difficult phenomenon, rate when having reduced injection.Along with environmental protection and awareness of saving energy strengthen Scale inhibitors must be towards future development multi-functional, efficient, environmental protection.Poly aspartic acid (PASP) and derivative thereof belong to the class in polyamino acid.Poly aspartic acid and derivative thereof are ammonia, carbonic acid gas and the water of environmental sound because the peptide bond on its structure main chain easily is subjected to the effects such as microorganism, the fungi final degraded product that ruptures.Therefore poly aspartic acid and derivative thereof are that biological degradability is good, environmentally friendly chemical.Poly aspartic acid and derivative thereof of many uses.It is widely used in the fields such as water filling auxiliary agent of fertilizer synergistic, Treatment of Industrial Water, metal working fluid, household chemicals, oil field secondary oil recovery.
The productive rate that existing method prepares poly aspartic acid is 30-70%, and productive rate is low, and purity is 40-88%, and purity is not high, and existing method prepares the poly aspartic acid complicated operation, and power consumption is large, and exists the three wastes to discharge, and causes the shortcomings such as environmental pollution.
Summary of the invention
The objective of the invention is in order to solve the above-mentioned problems in the prior art, and provide a kind of for the preparation method of oil field with the environmentally friendly poly aspartic acid of ternary composite driving.
Of the present invention a kind ofly carry out according to following steps for the preparation method of oil field with the environmentally friendly poly aspartic acid of ternary composite driving:
One, take by weight the carboxylic acid anhydride of 5～20 parts, the organic acid of 2～10 parts, the aminating agent of 5～15 parts, the hydrolytic reagent of 0.1～1 part, the purifying agent of 5～20 parts and the washing composition of 5～20 parts;
Two, the carboxylic acid anhydride that step 1 is taken, organic acid and aminating agent, being placed in duplex and mediating the extruding kneader device, is to mix 30～60min under 50～70 ℃ of conditions in temperature, continues to be warming up to 180～300 ℃, constant temperature keeps 30～60min, obtains polysuccinimide;
Three, hydrolytic reagent hydrolysis 30～60min that the polysuccinimide that obtains to step 2 adds step 1 to take obtains the poly aspartic acid head product;
Four, the purifying agent that adds step 1 to take in the poly aspartic acid head product that obtains to step 3, constant temperature stirs 3～6h under 40 ℃ of conditions, and decompression drying is collected solid formation, and the washing composition that takes with step 1 washs, and decompression drying namely gets poly aspartic acid.
The present invention comprises following beneficial effect:
The poly aspartic acid that method of the present invention prepares, productive rate is 90%, improved 10-30% than existing productive rate, preparation poly aspartic acid purity is 98%, the present invention adopts the polymerization of solid matter duplex extruding kneader device, the preparation poly aspartic acid is as the anti-scale inhibitor of biology, adopts that method of the present invention has also that production technique is simple, energy consumption is low, three-waste free discharge, the production of energy continuous industry, transformation efficiency advantages of higher.
Description of drawings
Static-state scale inhibition rate curve figure under the different medicine chaste tree of Fig. a kind, different dispensing concentration; Wherein, 1 is the static-state scale inhibition rate curve of PBTCA, and 2 is the static-state scale inhibition rate curve of HEDP, and 3 is the static-state scale inhibition rate curve of PASP, and 4 is the static-state scale inhibition rate curve of HPAM;
Fig. 2 be under different medicine chaste tree kinds, different dispensing concentration the corrosion inhibition graphic representation wherein, 1 is PBTCA and 3mg/LZn
2+The corrosion inhibition curve of compound drug, 2 is HEDP and 3mg/LZn
2+The corrosion inhibition curve of compound drug, 3 is PASP and 3mg/LZn
2+The corrosion inhibition curve of compound drug, 4 is HPAM and 3mg/LZn
2+The corrosion inhibition curve of compound drug.
Embodiment
Hereinafter with reference to accompanying drawing to specifically describing according to environmentally friendly anti-scale inhibitor of the present invention and preparation method thereof; those skilled in the art should understand; following specific descriptions are for the ease of understanding the present invention, not being used for limiting protection scope of the present invention.
Embodiment one: a kind of of present embodiment carries out according to following steps for the preparation method of oil field with the environmentally friendly poly aspartic acid of ternary composite driving:
Two, take by weight the carboxylic acid anhydride of 5～20 parts, the organic acid of 2～10 parts, the aminating agent of 5～15 parts, the hydrolytic reagent of 0.1～1 part, the purifying agent of 5～20 parts and the washing composition of 5～20 parts;
Two, the carboxylic acid anhydride that step 1 is taken, organic acid and aminating agent, being placed in duplex and mediating the extruding kneader device, is to mix 30～60min under 50～70 ℃ of conditions in temperature, continues to be warming up to 180～300 ℃, constant temperature keeps 30～60min, obtains polysuccinimide;
Three, hydrolytic reagent hydrolysis 30～60min that the polysuccinimide that obtains to step 2 adds step 1 to take obtains the poly aspartic acid head product;
Four, the purifying agent that adds step 1 to take in the poly aspartic acid head product that obtains to step 3, constant temperature stirs 3～6h under 40 ℃ of conditions, and decompression drying is collected solid formation, and the washing composition that takes with step 1 washs, and decompression drying namely gets poly aspartic acid.
The poly aspartic acid that the method for present embodiment prepares, productive rate is 90%, improved 10-30% than existing productive rate, preparation poly aspartic acid purity is 98%, present embodiment adopts the polymerization of solid matter duplex extruding kneader device, the preparation poly aspartic acid is as the anti-scale inhibitor of biology, adopt that the method for present embodiment has also that production technique is simple, energy consumption is low, three-waste free discharge, can continuous industry production, the transformation efficiency advantages of higher.
It is duplex extruding kneader that present embodiment is mediated extrusion equipment.
Embodiment two: what present embodiment was different from embodiment one is: the carboxylic acid anhydride described in step 1 is maleic anhydride, acetic anhydride, diacetyl oxide, Tetra hydro Phthalic anhydride, Succinic anhydried, succinyl oxide, terephthalic anhydride or isophthalic anhydride.Other is identical with embodiment one.
Embodiment three: what present embodiment was different from embodiment one or two is: the aminating agent described in step 1 is that the quality percentage composition is 25%～28% ammoniacal liquor, bicarbonate of ammonia, volatile salt, ammonium nitrate or ammonium chloride.Other is identical with embodiment one or two.
Embodiment four: what present embodiment was different from one of embodiment one to three is: the organic acid described in step 1 is carboxylic acid, thionamic acid, 2-acrylic amine-2-methyl propane sulfonic acid,-sulfinic acid or thionothiolic acid.Other is identical with one of embodiment one to three.
Embodiment five: what present embodiment was different from one of embodiment one to four is: the hydrolytic reagent described in step 1 is the oxyhydroxide with basic metal or alkaline-earth metal.Other is identical with one of embodiment one to four.
Embodiment six: what present embodiment was different from one of embodiment one to five is: hydrolytic reagent sodium hydroxide or the potassium hydroxide described in step 1.Other is identical with one of embodiment one to five.
Embodiment seven: what present embodiment was different from one of embodiment one to six is: the described purifying agent described in step 1 is propyl carbinol, ethyl acetate, butanone, isopropyl ether, tertiary butyl tertbutyl ether or DMF.Other is identical with one of embodiment one to six.
Embodiment eight: what present embodiment was different from one of embodiment one to seven is: described in step 2 is to mix 30～60min under 60 ℃ of conditions in temperature.Other is identical with one of embodiment one to seven.
Embodiment nine: what present embodiment was different from one of embodiment one to eight is: the washing composition described in step 4 is methyl alcohol, dehydrated alcohol, butanols, propyl alcohol or Virahol.Other is identical with one of embodiment one to eight.
Embodiment ten: what present embodiment was different from one of embodiment one to nine is: take by weight the carboxylic acid anhydride of 8～15 parts, the organic acid of 5～7 parts, the aminating agent of 8～12 parts, the hydrolytic reagent of 0.4～0.6 part, the purifying agent of 8～15 parts and the washing composition of 8～15 parts described in step 1.Other is identical with one of embodiment one to nine.
Verify beneficial effect of the present invention by following examples:
One, producing of polysuccinimide (PSI): get 12 parts of maleic anhydrides, 6 parts of 2-acrylic amine-2-methyl propane sulfonic acids and 10 parts of bicarbonate of ammonia, grinding is placed in duplex extruding kneader device, be ground and mixed 30min under 50 ℃～70 ℃ conditions in temperature, continue to be warming up to 185 ℃, keep 30min, obtain polysuccinimide (PSI);
Two, the hydrolysis of polysuccinimide (PSI): 10 parts of polysuccinimides (PSI) that obtains to step 1 add 1 part of quality percentage composition be 14% aqueous sodium hydroxide solution at 65 ℃ of Water Under solution 30min, obtain poly aspartic acid (PASP) head product;
Three, add the N of 1 part in 1 part of the poly aspartic acid that obtains to step 2 (PASP) head product, dinethylformamide (DMF), then constant temperature stirs 1h under 40 ℃ of conditions, be the dry 30min of 2.67KPa condition in vacuum tightness, dried solid substance carries out continuous washing with dehydrated alcohol, then be dry 30min under the 1.3KPa condition in vacuum tightness, namely get poly aspartic acid (PASP) purifying solid.
The poly aspartic acid that the present embodiment prepares (PASP) productive rate is 90%, and purity is 98%.
One, producing of polysuccinimide (PSI): get 12 parts of maleic anhydrides, 10 parts of 2-acrylic amine-2-methyl propane sulfonic acids and 10 parts of bicarbonate of ammonia, grinding is placed on mediates in extrusion equipment, be ground and mixed 30min under 60 ℃ of conditions in temperature, continue to be warming up to 200 ℃, keep 30min, obtain polysuccinimide (PSI);
Two, the hydrolysis of polysuccinimide (PSI): obtaining 10 parts of polysuccinimides (PSI) to step 1, to add 0.5 part of quality percentage composition be 14% the aqueous sodium hydroxide solution 60min that is hydrolyzed under 65 ℃ of conditions, obtains poly aspartic acid (PASP) head product;
Three, 2 parts of the poly aspartic acid that obtains to step 2 (PASP) head products add 1 part of N, dinethylformamide (DMF), then constant temperature stirs 2h under 40 ℃ of conditions, be the dry 30min of 2.67KPa condition in vacuum tightness, dried solid substance carries out continuous washing with dehydrated alcohol, then be dry 30min under the 1.3KPa condition in vacuum tightness, namely get poly aspartic acid (PASP) purifying solid.
The poly aspartic acid that the present embodiment prepares (PASP) productive rate is 90%, and purity is 98%.
The environmentally friendly antiscale scale inhibitor poly-asparagic acid (PASP) that the present embodiment provides have the antiscale scale inhibition performance high, have corrosion inhibition, a biodegradable performance.This agent has good antiscale scale-inhibiting properties, by effects such as chelating, lattice distortion, surface adsorption, solubilisings, calcium carbonate, calcium sulfate and calcium phosphate etc. had significant scale suppression scale effect, simultaneously the particulate matter in water and metal ion had good dispersion, stabilization, and has very high calcium tolerance, applicable to high alkalinity, high rigidity and high-temperature systems.Antiscale scale inhibition to ternary compound oil drive is significant.
The Salter standard spectrogram that the poly aspartic acid (PASP) that embodiment 2 is prepared carries out infrared spectrum and poly aspartic acid compares analysis, finds that most of characteristic peaks are all similar; Be the 3568cm at standard diagram
-1Neighbouring is the absorption peak of N-H key, 2904cm
-1And 2893cm
-1There are CH2-base stretching vibration peak, 1712cm in the place
-1The place is the absorption peak of carboxyl, 1573cm
-1The place is amido (peptide bond) absorption peak, simultaneously at 1415cm
-1Near be-absorption peak of CH that in sum: this compound is Polyaspartic acid Type Scale Inhibitors.Hence one can see that, and the polymerization of the poly aspartic acid (PASP) of embodiment 2 preparation is little on the impact of its generation, itself and aspartic acid structure proximate, and performance is close.
Illustrate that by following performance test the poly aspartic acid (PASP) of embodiment 2 preparations is for the application performance of the antiscale scale inhibition of ternary compound oil drive.
Poly aspartic acid (PASP) to embodiment 2 preparations carries out following Performance Detection:
1) scale-inhibiting properties of poly aspartic acid (PASP) evaluation
In order to understand CaCO
3The scale-inhibiting properties of dirt, adopt classical static-state scale inhibition method (T=80 ℃, t=10h) scale-inhibiting properties of the poly aspartic acid (PASP) of embodiment 2 preparations is studied, the water-quality guideline of test water distribution is: the Ca
2+/ 4.00mmol; HCO
3/ 8.00mmol; Test water is distilled water; The pH of test water is the natural pH of solution, contrasts with PBTCA, HEDP and HPAM simultaneously, and the static-state scale inhibition rate the results are shown in shown in Figure 1.
As can be seen from Figure 1, under the test water quality of middle high rigidity, middle high alkalinity, the poly aspartic acid (PASP) of embodiment 2 preparations is to CaCO
3Scale-inhibiting properties slightly be inferior to PBTCA and HEDP, be much better than HPAM.Show the water quality for middle high rigidity and middle high alkalinity, the poly aspartic acid (PASP) of embodiment 2 preparations has the performance that compares favourably with PBTCA and HEDP.Detailed studies show that, when test water hardness and basicity continuation rising, the degradation of HEDP is more obvious.Make at last under comparatively abominable condition of water quality, the scale-inhibiting properties of PASP slightly is better than HEDP.
2) corrosion inhibition of poly aspartic acid (PASP)
Nitrogen-atoms in poly aspartic acid (PASP), owing to containing lone-pair electron, therefore easily with have the transition metal atoms Cheng Jian of sky d track, thereby finally be adsorbed on the purpose that the metallic surface reaches the protection metal.For the corrosion inhibition of the poly aspartic acid (PASP) of understanding embodiment 2 preparation, we with the rotary hanging plate method (T=50 ℃ t=72h) has been measured the TBCA of different concns, HEDP, PASP and HPAM and 3mg/LZn
2+Compound drug its result of corrosion inhibition as shown in Figure 2, wherein, contain Cl in test water
-, HCO
3And SO
4 2-Be respectively 100mg/L.
As can be seen from Figure 2, with Zn
2+After composite, corrosion inhibition and the HEDP of the poly aspartic acid (PASP) of embodiment 2 preparations are suitable with PBTCA.
3) thermostability and the stability to hydrolysis of poly aspartic acid (PASP)
Thermostability and stability to hydrolysis for the poly aspartic acid (PASP) of understanding embodiment 2 preparation, we are divided into three parts with poly aspartic acid (PASP) aqueous solution of embodiment 2 preparations: the 1st part of (A, it is 7mg/L that poly aspartic acid (PASP) aqueous solution is diluted to concentration) and the 2nd part of (B, it is 7mg/L that poly aspartic acid (PASP) aqueous solution is diluted to concentration) at room temperature preserve routinely, the 3rd part (C, it is 7mg/L that poly aspartic acid (PASP) aqueous solution is diluted to concentration); Then A, B and C are placed 100h in the water-bath of 90 ℃, (adopt test water, test condition is T=50 ℃ to then its physical properties of mensuration under the same terms in the time of T=25 ℃, and the inhibition of comparison A, B and C, t=72h, C=15mg/L, Zn
2+=3mg/L) scale inhibition effect (adopt test water, test condition is T=80 ℃, t=10h, C=3mg/L).Wherein, contain Cl in test water
-, HCO
3And SO
4 2-Be respectively 100mg/L.
The mean value of 3 measurement results is as shown in table 1, from the results shown in Table 1, in the error at measurment scope, the equal no significant difference of various performances of A, B, C medicament, so the poly aspartic acid (PASP) of embodiment 2 preparation is at corresponding temperature (T≤90 ℃) and time (t≤100h) have good thermostability and stability to hydrolysis in scope.
Table 1 poly aspartic acid (PASP) thermally-stabilised
4) biological degradability of poly aspartic acid (PASP)
Poly aspartic acid (PASP) is as green scale corrosion inhibitor, and biological degradability is one of its characteristic.For the biodegradation character of the poly aspartic acid (PASP) of investigating embodiment 2 preparation, our compound concentration is poly aspartic acid (PASP) aqueous solution of 40mg/L. record the COD of this solution with the measuring method of GB GB/T11914-89 chemical oxygen demand (COD)
Cr=2885mg/L gets respectively in this solution 100mL and some 250mL narrow-mouth bottles, is A, B, three groups of C (every group of 3～5 Duplicate Samples) with it; Adding 1mL to adopt concentration in A, the B group is the anerobe strain liquid methanobacteria (COD of anerobe strain liquid of poly aspartic acid (PASP) aqueous solution of 40mg/L
Cr=887mg/L, methanobacteria is bought from Weifang Huinong's eco-friendly power source Science and Technology Ltd.), seal in the thermostat container that is placed on 35.0 ± 0.5 ℃ cultivate fully.Adding 1mL to adopt concentration in the C group is the aerobic bacteria strain liquid subtilis (COD of aerobic bacteria strain liquid of poly aspartic acid (PASP) aqueous solution of 40mg/L
Cr=748mg/L, subtilis is bought from North Sea group woods biotechnology company limited), adopt micro porous aeration head to blast by steam-laden air with the speed of 10～15mL/min, be placed in and take out B group sample after the thermostat container of 35.0 ± 0.5 ℃ is cultivated 72h, measure the COD of B group
Cr, then add in the B group water sample 1mL aerobic bacteria strain liquid (this moment the aerobic bacteria strain liquid COD
Cr=782mg/L), then blast air saturation water vapour with micro porous aeration head with the speed of 10～15mL/min, continue to be placed in the thermostat container of 35.0 ± 0.5 ℃ and cultivate; After total incubation time reaches 120h, take out nutrient solution and be 26.7mg/L with distilled water diluting to nutrient solution concentration, measure the COD of water sample
CrResult is as shown in table 2, as can be seen from Table 2, and under traditional biochemical processing process of anaerobic hydrolysis-aerobic treatment.The COD of test water sample
CrClearance is nearly 85%, shows that poly aspartic acid (PASP) has good biodegradability really, is environment amenable green scale corrosion inhibitor.
Table 2 poly aspartic acid (PASP) degraded water sample COD
CrEfficiency data
To sum up, the production technique of embodiment 2 is easier, and resulting poly aspartic acid (PASP) has the scale inhibition ability close with HEDP with PBTCA in the test water of middle high rigidity, middle high alkalinity; In corrosion test water, sintetics and Zn
2+Have after composite and HEDP and the similar corrosion inhibition of PBTCA.Product has good thermostability and stability to hydrolysis, has good biodegradability, does not contain nutrient rich phosphorus, really a kind of environment amenable green scale corrosion inhibitor.
The COD of water sample
CrClearance is nearly 85%, shows that poly aspartic acid has good biodegradability really, is environment amenable green scale corrosion inhibitor.
Claims (10)
1. one kind is used for the preparation method that the environmentally friendly poly aspartic acid of ternary composite driving is used in the oil field, it is characterized in that said method comprising the steps of:
One, take by weight the carboxylic acid anhydride of 5～20 parts, the organic acid of 2～10 parts, the aminating agent of 5～15 parts, the hydrolytic reagent of 0.1～1 part, the purifying agent of 5～20 parts and the washing composition of 5～20 parts;
Two, the carboxylic acid anhydride that step 1 is taken, organic acid and aminating agent, being placed in duplex and mediating the extruding kneader device, is to mix 30～60min under 50～70 ℃ of conditions in temperature, continues to be warming up to 180～300 ℃, constant temperature keeps 30～60min, obtains polysuccinimide;
Three, hydrolytic reagent hydrolysis 30～60min that the polysuccinimide that obtains to step 2 adds step 1 to take obtains the poly aspartic acid head product;
Four, the purifying agent that adds step 1 to take in the poly aspartic acid head product that obtains to step 3, constant temperature stirs 3～6h under 40 ℃ of conditions, and decompression drying is collected solid formation, and the washing composition that takes with step 1 washs, and decompression drying namely gets poly aspartic acid.
2. according to claim 1 a kind of for the preparation method of oil field with the environmentally friendly poly aspartic acid of ternary composite driving, it is characterized in that the carboxylic acid anhydride described in step 1 is maleic anhydride, acetic anhydride, diacetyl oxide, Tetra hydro Phthalic anhydride, Succinic anhydried, succinyl oxide, terephthalic anhydride or isophthalic anhydride.
3. according to claim 1 a kind of for the preparation method of oil field with the environmentally friendly poly aspartic acid of ternary composite driving, it is characterized in that the aminating agent described in step 1 is that the quality percentage composition is 25%～28% ammoniacal liquor, bicarbonate of ammonia, volatile salt, ammonium nitrate or ammonium chloride.
4. according to claim 1 a kind of for the preparation method of oil field with the environmentally friendly poly aspartic acid of ternary composite driving, it is characterized in that the organic acid described in step 1 is carboxylic acid, thionamic acid, 2-acrylic amine-2-methyl propane sulfonic acid,-sulfinic acid or thionothiolic acid.
5. according to claim 1 a kind of for the preparation method of oil field with the environmentally friendly poly aspartic acid of ternary composite driving, it is characterized in that the hydrolytic reagent described in step 1 is the oxyhydroxide with basic metal or alkaline-earth metal.
6. a kind of for the preparation method of oil field with the environmentally friendly poly aspartic acid of ternary composite driving according to claim 1 or 5, it is characterized in that hydrolytic reagent sodium hydroxide or the potassium hydroxide described in step 1.
7. according to claim 1 a kind of for the preparation method of oil field with the environmentally friendly poly aspartic acid of ternary composite driving, it is characterized in that the described purifying agent described in step 1 is propyl carbinol, ethyl acetate, butanone, isopropyl ether, tertiary butyl tertbutyl ether or DMF.
8. according to claim 1 or 7 is described a kind of for the preparation methods of oil field with the environmentally friendly poly aspartic acid of ternary composite driving, it is characterized in that described in step 2 being to mix 30～60min under 60 ℃ of conditions in temperature.
9. according to claim 1 a kind of for the preparation method of oil field with the environmentally friendly poly aspartic acid of ternary composite driving, it is characterized in that the washing composition described in step 4 is methyl alcohol, dehydrated alcohol, butanols, propyl alcohol or Virahol.
10. according to claim 1 a kind of for the preparation method of oil field with the environmentally friendly poly aspartic acid of ternary composite driving, it is characterized in that taking by weight the carboxylic acid anhydride of 8～15 parts, the organic acid of 5～7 parts, the aminating agent of 8～12 parts, the hydrolytic reagent of 0.4～0.6 part, the purifying agent of 8～15 parts and the washing composition of 8～15 parts described in step 1.
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| CN113264598A (en) * | 2021-06-09 | 2021-08-17 | 西安瑞杰实业股份有限公司 | Scale inhibition agent for Yinba method blast furnace slag treatment system and preparation method and application thereof |
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