CN1521236A - Method for removing metal from hydrocarbon oil using copolymers or its salts containing acrylic acid and sulfonic acid - Google Patents
Method for removing metal from hydrocarbon oil using copolymers or its salts containing acrylic acid and sulfonic acid Download PDFInfo
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Abstract
The process of eliminating metal from hydrocarbon oil with the copolymer containing acrylic acid and 2-acrylamide-2-methyl propyl sulfonic acid includes mixing the copolymer containing acrylic acid and 2-acrylamide-2-methyl propyl sulfonic acid or its salt with water injecting demulsifier at 30-200 deg.c to make metal in hydrocarbon oil generate water soluble compound dissolved in water, and oil-water separation to eliminate metal from hydrocarbon oil. The process has the features of less copolymer consumption and high elimination efficiency, and may be used for hydrocarbon oil in excessive calcium content.
Description
Technical field
The present invention relates to containing the multipolymer of vinylformic acid and 2-acrylamide-2-methyl-propyl sulfonic acid or the method that its salt removes metals in hydrocarbon oil.
Technical background
Along with the development of oil recovery technique, many heavy crude are exploited out in recent years.Metal content in these crude oil, particularly some alkaline-earth metal such as Ca, Mg, Fe content increases greatly, and they are processed the influence that brings to crude oil and are subject to people's attention day by day.Studies show that Ca content increases in the stock oil, will significantly reduce catalyst molecule sieve and matrix area, directly influence activity of such catalysts.The phenomenon of catalytic cracking agent poisoning and deactivation appears in the high refinery that contains Ca crude oil of some refinings in recent years, yield of light oil is reduced significantly, but also have influence on downstream residual oil quality, causes the crude oil processing profit of refinery to reduce greatly.
Alkaline-earth metal Ca, Mg etc. in the crude oil, a part exists with forms such as water-soluble salt, slightly soluble salt such as calcium chloride, Calcium hydrogen carbonate, calcium sulfate, lime carbonate, and major part exists with oil soluble petroleum acid calcium.In the electric desalting process of general refinery, mainly remove most soluble salts, the petroleum acid calcium of various water-fast inorganic metal salts and organic bound state almost there is not removal effect.This part metal overwhelming majority remains in normal pressure or the vacuum residuum, has influenced further processing and utilization to vacuum residuum.
Relevant crude oil demetalization technology has been carried out more research work both at home and abroad.In the U.S. Pat 3,059,368 in early days, H.Bieber discloses and has a kind ofly made Ni in the oil with mineral acid treatment hydrocarbon ils such as hydrochloric acid, V, and the cohesion of porphyrin metal compounds such as Fe reaches the method that removes the metal purpose thereby separate condensation product then.Disclosed and industrial widely used metal remover can roughly be divided into three major types according to its mechanism of action in the domestic and foreign literature at present: (1) precipitation agent, mainly be phosphoric acid, sulfuric acid or its esters that can generate hydrophilic slightly soluble or indissoluble salt with calcium in the oil, adopt ammonium phosphate to make precipitation agent as CN1054261, with vitriol, hydrogen hydroxyl phenol is made solid wetting agent; CN1055552 is with H
2SO
4Or its salt makes metal remover, makes precipitating inhibitor with organic phospho acid or its salt; CN1232487 adopts CO
2Carry out decalcification.Because the lime carbonate, calcium sulfate or the calcium phosphate slightly soluble or water insoluble that generate, and easily carried secretly thereby the decalcification effect of such metal remover is affected by oil phase.(2) inorganic chelator mainly is the polyphosphoric acid or its esters that can generate water soluble chelate compound with Ca, makes sequestrant as the CN1076473 report with Sodium hexametaphosphate 99 or tripoly phosphate sodium STPP.Because the easy hydrolysis on chemical property of polyphosphoric acid or its esters generates ortho-phosphoric acid or its salt, and large usage quantity, thereby can not effectively calcium be removed.
(3) organic sequestering agent mainly is the aminocarboxylic acid or its esters that can generate water soluble chelate compound with Ca, di-carboxylic acid or its esters, monocarboxylic acid or its esters, hydroxycarboxylic acid or its esters, organic phospho acid or its esters, organic sulfonic acid or its esters, organic phosphine sulfonic compound, as CN8,610,728A, CN1,036,981, US4,988,433, CN87,105,863 A, CN1,120,575, CN1,221,018, the metal remover of report such as CN1221018 promptly belongs to this type of.In U.S. Pat 4,439, in 345, Duke discloses a kind of carboxylic acid or its amine salt of using and has come to strengthen the intermediate phase emulsion of the displacement of reservoir oil product demetalization so that the method for its breakdown of emulsion from tensio-active agent, in U.S. Pat P5976358, employing crude oil such as Sartori contact the calcium metal that removes in the oil with the resin that is loaded with carboxyl, sulfonic group and the acid groups of seeing.
Summary of the invention
The present invention adopts the multipolymer contain vinylformic acid and 2-acrylamide-2-methyl-propyl sulfonic acid or its salt to remove metal in the hydrocarbon ils, and especially Ca, Fe satisfy the requirement of following process to the influence of hydrocarbon ils deep processing to alleviate alkaline-earth metal and transition metal.
The method that removes metals in hydrocarbon oil provided by the invention comprises: multipolymer or its salt and the water filling and the emulsion splitter thorough mixing that will contain vinylformic acid and 2-acrylamide-2-methyl-propyl sulfonic acid, make the metal in the hydrocarbon ils generate water miscible title complex, be dissolved in the water, by oily water separation, remove the metal in the hydrocarbon ils.
The said multipolymer that contains vinylformic acid and sulfonic acid is except being the comonomer with vinylformic acid (AA) and 2-acrylamide-2-methyl-propyl sulfonic acid (AMPS), can also contain toxilic acid (acid anhydride) (MA), styrene sulfonic acid (SS), acrylamide (AM), Propylene glycol monoacrylate (HPA) and 2-acrylamide-2-methyl-propyl phosphonic acids monomers such as (AMPP), form structure, form, the multipolymer that binary that molecular weight is different or binary are above, for example vinylformic acid-2-acrylamide-2-methyl-propyl sulfonic acid copolymer (AA/AMPS), as acrylic acid-acrylamide-2-acrylamide-2-methyl-propyl sulfonic acid copolymer (AA/AM/AMPS), vinylformic acid-2-acrylamide-2-methyl-propyl sulfonic acid-2-acrylamide-2-methyl-propyl phosphonic acid copolymer (AA/AMPS/AMPP), vinylformic acid-2-acrylamide-2-methyl-propyl sulfonic acid-styrene sulfonic acid multipolymer (AA/AMPS/SS) etc.
Studies show that the oil soluble calcium of non-porphyrin form and iron mainly exist with the naphthenate form in the crude oil.By multipolymer and the water and the crude oil thorough mixing that will contain vinylformic acid and AMPS sulfonic acid, metal ions such as the calcium that exists with the naphthenate form in this multipolymer and the crude oil on water-oil interface, magnesium, iron combine, forming water-soluble complex compound goes forward side by side into water, with oily water separation, thereby remove metal in the crude oil.
In the said multipolymer that contains vinylformic acid and sulfonic acid, acrylic acid content is 10-95%, preferred 30-70%, and the content of 2-acrylamide-2-methyl-propyl sulfonic acid is 5-80%, preferred 20-50%, the content of all the other comonomers is 0-20%.The molecular weight of said multipolymer is 500-30000, preferred 1000-20000; The consumption of multipolymer is 0.5-5 a times of the calcium total mass in the hydrocarbon ils, is preferably 1.0-3.5 doubly.
The salt of said multipolymer is water-soluble salt, as sylvite, sodium salt, ammonium salt or the like.
Said hydrocarbon ils can be crude oil, heavy hydrocarbon residual oil, solvent-deasphalted oils or from crude oil derived other hydrocarbon-type oil that goes out.
Can earlier multipolymer be joined in the water filling during actually operating, mix with hydrocarbon ils then, or directly join in the hydrocarbon ils, but preferably mix with water filling earlier, total water injection rate is the 3-50% of hydrocarbon ils volume, preferred 4-20%.Can according to circumstances be adjusted to pH value 2-7, be preferably 4-7 with ammoniacal liquor.The profit mixing time was generally 0.5 second-60 minutes, and in general, mixing means is different with mixture strength, reaches well-mixed also asynchronism(-nization), for example, adopted the fruit juice agitator of selling on the market can mix in 1 second-2 minutes.Mixing temperature changes with the density and the viscosity of hydrocarbon ils pan feeding, and density is high more, and viscosity is approximately big, and then required mixing temperature is high more, otherwise then can carry out being low to moderate under the room temperature, is generally 30-200 ℃, preferred 60-150 ℃.
Emulsion splitter can based on crude or the kind of hydrocarbon feed select, can be used as auxiliary products and buy from the producer that sells hydrocarbon ils.Can be single emulsion splitter or composite demulsifying agent, as BP2040, FC9301 or NS9906 etc., consumption be the 1-100ppm of hydrocarbon ils weight, and the effect of emulsion splitter is to promote oily water separation.
The inventive method can be carried out in the conventional demineralising process of refinery, can realize on electric desalting apparatus in the actually operating, and decalcification is finished with desalination, dehydration.Oily water separation can be adopted any technology that comprises the counter-current extraction method.When on electric desalting apparatus, realizing,, tackle electric desalting apparatus before implementing, comprise that injecting pipeline, electrical desalter and internal electrical pole plate etc. carry out rotproofing in order to reduce or to avoid the corrosion of acid to relevant carbon steel equipment.
The inventive method has the advantages that consumption is little, removal efficiency is high, can be applicable to contain any hydrocarbon ils of super allowance calcium.
Embodiment
Embodiment 1
Get experiment with stock oil from factory of NW China petrochemical refining, for North SinKiang, Xinjiang crude oil and South Sinkiang crude oil with the vacuum residuum after 7: 3 mixed.Residual oil is diluted with kerosene in the laboratory, residual oil and kerosene ratio are 4: 1, dilution back stock oil calcium contents 85.3ppm, iron level 9.9ppm.Preparation raw material oil is preheated to 90-100 ℃.AA/AMPS multipolymer (molecular weight 1000～20000, it is about 20～50% to contain AMPS, Beijing woods China water quality stabilizer factory provides), water filling, emulsion splitter are made into the aqueous solution by certain agent/calcium mass ratio, injection rate 10%, and emulsion splitter is NS-9906, dosage 50ppm.Behind the agitator thorough mixing, pour the aqueous solution and the preheating material oil that are made into into the cone-shaped glass desalter, adopt DP-II type electric desalting breakdown of emulsion instrument to carry out oily water separation, electric-force gradient 200v/cm, 80 ℃ of temperature, take out after one hour, to taking off the back crude oil sampling, carry out calcium and iron level analysis with plasma emission spectroscopy (ICP/AES).The result is as shown in table 1 below.
Table 1
| Agent/calcium mass ratio | Take off back crude oil metal content/ppm | Metal removal rate/% | ||
| ??Ca | ????Fe | ????Ca | ????Fe | |
| ????1.76 | ??20.7 | ????5.8 | ????75.7 | ????41.1 |
| ????2.64 | ??10.7 | ????5.4 | ????87.4 | ????45.4 |
By result in the table 1 as can be known, North SinKiang and South Sinkiang crude oil with the vacuum residuum of 3: 7 commingled crudes, are not only had good decalcification effect in agent/calcium mass ratio 1.0-4.0 preferable range, simultaneously iron is also had removal effect.
Embodiment 2
Present embodiment adopts AA/AMPS multipolymer (molecular weight 1000～20000, AMPS 20～50%, Beijing woods China water quality stabilizer factory provides) to remove calcium and iron in the Jiu Qu viscous crude of Kelamayi.The experiment with crude oil be Kelamayi, Xinjiang Jiu Qu viscous crude and with the mixing oil of kerosene with 7: 3.The experiment emulsion splitter is FC9301, and experimental procedure and embodiment 1 are together.The result is as shown in table 2 below.
Embodiment 3
The present embodiment terpolymer demetalization that contains vinylformic acid and AMPS.
Experiment is Kelamayi, an Xinjiang Jiu Qu viscous crude with crude oil.Metal remover vinylformic acid/2-acrylamide-2-methyl propane sulfonic acid/2-acrylamide-2-methyl-propyl phosphonic acids (AA/AMPS/AMPP) multipolymer (water quality stabilizer factory of Nanjing University provides), metal remover vinylformic acid/2-acrylamido-2-methyl propane sulfonic acid/Propylene glycol monoacrylate (AA/AMPS/HPA multipolymer (the product NC-309 of U.S. Nacol company).Experimental procedure and embodiment 1 are together.The result is as shown in table 3 below.
Table 2
| The crude oil place of production and crude oil type | Agent/calcium mass ratio | Take off back crude oil metal content/ppm | Metal removal rate/% | ||
| ????Ca | ????Fe | ????Ca | ????Fe | ||
| Kelamayi, Xinjiang Jiu Qu viscous crude (calcic 266ppm, iron 24.6) | ????0 | ????254 | ????- | ????4.4 | |
| ????0.85 | ????152 | ????24.3 | ????42.0 | ????1.2 | |
| ????1.13 | ????101 | ????23.2 | ????61.5 | ????5.7 | |
| ????1.41 | ????63.8 | ????22.5 | ????75.6 | ????8.5 | |
| ????1.69 | ????28.1 | ????22.2 | ????89.4 | ????9.8 | |
| ????1.80 | ????13.3 | ????18.4 | ????95.0 | ????25.2 | |
| Kelamayi Jiu Qu viscous crude and kerosene were with 7: 3 mixing oil (calcic 190.5ppm, iron 18.1 ppm) | ????0.79 | ????65.3 | ????17.9 | ????66.0 | ????1.1 |
| ????1.18 | ????5.0 | ????17.2 | ????97.4 | ????5.3 | |
| ????1.78 | ????5.4 | ????7.0 | ????97.2 | ????61.4 | |
| ????1.97 | ????5.9 | ????3.4 | ????96.9 | ????81.5 | |
By result in the table 2 as can be known, under the situation that does not add decalcifying agent, the decalcification rate only is 4.4%.To Kelamayi, Xinjiang Jiu Qu viscous crude and with the mixing oil of kerosene, be low to moderate in agent/calcium mol ratio and can satisfy the needs that remove calcium and iron level at 2 o'clock.
Table 3
| The metal remover type | Agent/calcium mass ratio | Take off back crude oil metal content/ppm | Metal removal rate/% | ||
| ????Ca | ????Fe | ????Ca | ????Fe | ||
| ??AA/AMPS/AMPP | ????1.25 | ????38.8 | ????22.4 | ????85.4 | ????8.8 |
| ????1.75 | ????21.3 | ????19.6 | ????92.0 | ????20.2 | |
| ??AA/AMPS/HPA | ????1.75 | ????25.0 | ????20.8 | ????90.6 | ????15.5 |
By result in the table 3 as can be known, under the lower condition of agent/calcium, above-mentioned two kinds of multipolymers that contain vinylformic acid and AMPS have good metal removal effect.
Claims (10)
1. remove the method for metals in hydrocarbon oil with the multipolymer that contains vinylformic acid and 2-acrylamide-2-methyl-propyl sulfonic acid, comprise: will contain the multipolymer of vinylformic acid and 2-acrylamide-2-methyl-propyl sulfonic acid or its salt and water filling and emulsion splitter at 30-200 ℃ of thorough mixing, make the metal in the hydrocarbon ils generate water miscible title complex, be dissolved in the water, by oily water separation, remove the metal in the hydrocarbon ils.
2. in accordance with the method for claim 1, it is characterized in that, also contain in the said multipolymer and be selected from toxilic acid or maleic anhydride, styrene sulfonic acid, acrylamide, Propylene glycol monoacrylate and 2-acrylamide-2-methyl-propyl phosphonic monomer.
3. according to claim 1 or 2 described methods, it is characterized in that said multipolymer is selected from vinylformic acid-2-acrylamide-2-methyl-propyl sulfonic acid copolymer, acrylic acid-acrylamide-2-acrylamide-2-methyl-propyl sulfonic acid copolymer, vinylformic acid-2-acrylamide-2-methyl-propyl sulfonic acid-2-acrylamide-2-methyl-propyl phosphonic acid copolymer and vinylformic acid-2-acrylamide-2-methyl-propyl sulfonic acid-styrene sulfonic acid multipolymer.
4. in accordance with the method for claim 1, it is characterized in that in the said multipolymer, acrylic acid content is 10-95%, the content of 2-acrylamide-2-methyl-propyl sulfonic acid is 5-80%, and the content of all the other comonomers is 0-20%.
5. according to claim 1 or 4 described methods, it is characterized in that in the said multipolymer, acrylic acid content is 30-70%, the content of 2-acrylamide-2-methyl-propyl sulfonic acid is 20-50%.
6. in accordance with the method for claim 1, it is characterized in that the molecular weight of said multipolymer is 500-30000.
7. according to claim 1 or 6 described methods, it is characterized in that the molecular weight of said multipolymer is 1000-20000.
8. in accordance with the method for claim 1, it is characterized in that the consumption of said multipolymer is 0.5-5 a times of the calcium total mass in the hydrocarbon ils.
9. according to claim 1 or 8 described methods, it is characterized in that the consumption of multipolymer is 1.0-3.5 a times of the calcium total mass in the hydrocarbon ils.
10. in accordance with the method for claim 1, it is characterized in that total water injection rate is the 3-50% of hydrocarbon ils volume, mixing temperature is 60-150 ℃.
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- 2003-01-30 CN CN 03102263 patent/CN1234810C/en not_active Expired - Lifetime
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| CN102373052B (en) * | 2010-08-26 | 2013-07-03 | 中国石油化工股份有限公司 | Binary composite oil displacement agent for tertiary oil recovery and preparation method thereof |
| CN102373051B (en) * | 2010-08-26 | 2013-07-03 | 中国石油化工股份有限公司 | Binary composite oil displacement agent and preparation method thereof |
| CN103608425A (en) * | 2011-05-06 | 2014-02-26 | 强品科技有限公司 | Low dosage polymeric naphthenate inhibitors |
| CN103608425B (en) * | 2011-05-06 | 2016-10-19 | 强品科技有限公司 | Low dosage polymeric naphthenate inhibitor |
| CN104176837A (en) * | 2014-09-09 | 2014-12-03 | 武汉理工大学 | Scale inhibitor |
| CN104176837B (en) * | 2014-09-09 | 2015-09-16 | 武汉理工大学 | Scale inhibitors |
| WO2017156781A1 (en) | 2016-03-18 | 2017-09-21 | General Electric Company | Methods and compositions for prevention of fouling in caustic towers |
| CN109219650A (en) * | 2016-03-18 | 2019-01-15 | 通用电气公司 | Prevent the method and composition of the dirt of caustic tower |
| EP3430106A4 (en) * | 2016-03-18 | 2019-11-13 | General Electric Company | Methods and compositions for prevention of fouling in caustic towers |
| CN113801261A (en) * | 2016-03-18 | 2021-12-17 | 苏伊士水务技术(无锡)有限公司 | Method and composition for preventing fouling of alkaline process towers |
| CN107418585A (en) * | 2017-07-24 | 2017-12-01 | 天津市德宇生物工程技术有限公司 | A kind of saline-alkali soil conditioner |
| CN107418585B (en) * | 2017-07-24 | 2020-11-10 | 天津市德宇生物工程技术有限公司 | Saline-alkali soil conditioner |
| CN112430459A (en) * | 2021-01-28 | 2021-03-02 | 山东奥士德石油技术有限公司 | Preparation method of high-temperature-resistant thick oil viscosity reducer |
| CN115926047A (en) * | 2022-12-06 | 2023-04-07 | 无锡阿科力科技股份有限公司 | Demetalization chelating agent and preparation method and application thereof |
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