CN117448037A - Scale inhibitor for high-temperature oil refining system and preparation method and application thereof - Google Patents
Scale inhibitor for high-temperature oil refining system and preparation method and application thereof Download PDFInfo
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- CN117448037A CN117448037A CN202311429887.1A CN202311429887A CN117448037A CN 117448037 A CN117448037 A CN 117448037A CN 202311429887 A CN202311429887 A CN 202311429887A CN 117448037 A CN117448037 A CN 117448037A
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- scale inhibitor
- oil refining
- temperature oil
- refining system
- triazole
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- 239000002455 scale inhibitor Substances 0.000 title claims abstract description 32
- 238000007670 refining Methods 0.000 title claims abstract description 25
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- KDCGOANMDULRCW-UHFFFAOYSA-N 7H-purine Chemical compound N1=CNC2=NC=NC2=C1 KDCGOANMDULRCW-UHFFFAOYSA-N 0.000 claims abstract description 24
- 229920000642 polymer Polymers 0.000 claims abstract description 23
- 150000003852 triazoles Chemical class 0.000 claims abstract description 22
- 238000005260 corrosion Methods 0.000 claims abstract description 11
- 230000007797 corrosion Effects 0.000 claims abstract description 11
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims abstract description 10
- 238000006116 polymerization reaction Methods 0.000 claims abstract description 5
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 12
- 239000003960 organic solvent Substances 0.000 claims description 11
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 claims description 8
- 239000002904 solvent Substances 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 239000003112 inhibitor Substances 0.000 claims description 7
- 239000000243 solution Substances 0.000 claims description 7
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 claims description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
- 239000003963 antioxidant agent Substances 0.000 claims description 6
- 230000003078 antioxidant effect Effects 0.000 claims description 6
- 239000003054 catalyst Substances 0.000 claims description 6
- 239000003599 detergent Substances 0.000 claims description 6
- 239000002270 dispersing agent Substances 0.000 claims description 6
- 239000003208 petroleum Substances 0.000 claims description 5
- TXUICONDJPYNPY-UHFFFAOYSA-N (1,10,13-trimethyl-3-oxo-4,5,6,7,8,9,11,12,14,15,16,17-dodecahydrocyclopenta[a]phenanthren-17-yl) heptanoate Chemical compound C1CC2CC(=O)C=C(C)C2(C)C2C1C1CCC(OC(=O)CCCCCC)C1(C)CC2 TXUICONDJPYNPY-UHFFFAOYSA-N 0.000 claims description 4
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 4
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 claims description 4
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims description 4
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims description 4
- 229910021626 Tin(II) chloride Inorganic materials 0.000 claims description 4
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 claims description 4
- NKDDWNXOKDWJAK-UHFFFAOYSA-N dimethoxymethane Chemical compound COCOC NKDDWNXOKDWJAK-UHFFFAOYSA-N 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 4
- 239000012074 organic phase Substances 0.000 claims description 4
- 238000010992 reflux Methods 0.000 claims description 4
- 239000001119 stannous chloride Substances 0.000 claims description 4
- 235000011150 stannous chloride Nutrition 0.000 claims description 4
- 238000005406 washing Methods 0.000 claims description 4
- 239000008096 xylene Substances 0.000 claims description 4
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 claims description 4
- 125000001425 triazolyl group Chemical group 0.000 claims description 3
- LEEANUDEDHYDTG-UHFFFAOYSA-N 1,2-dimethoxypropane Chemical compound COCC(C)OC LEEANUDEDHYDTG-UHFFFAOYSA-N 0.000 claims description 2
- JWUJQDFVADABEY-UHFFFAOYSA-N 2-methyltetrahydrofuran Chemical compound CC1CCCO1 JWUJQDFVADABEY-UHFFFAOYSA-N 0.000 claims description 2
- 229910015900 BF3 Inorganic materials 0.000 claims description 2
- 239000005662 Paraffin oil Substances 0.000 claims description 2
- OIRDTQYFTABQOQ-UHTZMRCNSA-N Vidarabine Chemical compound C1=NC=2C(N)=NC=NC=2N1[C@@H]1O[C@H](CO)[C@@H](O)[C@@H]1O OIRDTQYFTABQOQ-UHTZMRCNSA-N 0.000 claims description 2
- OIRDTQYFTABQOQ-KQYNXXCUSA-N adenosine Chemical compound C1=NC=2C(N)=NC=NC=2N1[C@@H]1O[C@H](CO)[C@@H](O)[C@H]1O OIRDTQYFTABQOQ-KQYNXXCUSA-N 0.000 claims description 2
- OIRDTQYFTABQOQ-UHFFFAOYSA-N ara-adenosine Natural products Nc1ncnc2n(cnc12)C1OC(CO)C(O)C1O OIRDTQYFTABQOQ-UHFFFAOYSA-N 0.000 claims description 2
- WTEOIRVLGSZEPR-UHFFFAOYSA-N boron trifluoride Chemical compound FB(F)F WTEOIRVLGSZEPR-UHFFFAOYSA-N 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims description 2
- 239000002283 diesel fuel Substances 0.000 claims description 2
- 238000001035 drying Methods 0.000 claims description 2
- 239000003350 kerosene Substances 0.000 claims description 2
- 239000000178 monomer Substances 0.000 claims description 2
- 125000000561 purinyl group Chemical group N1=C(N=C2N=CNC2=C1)* 0.000 claims description 2
- 239000012266 salt solution Substances 0.000 claims description 2
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims description 2
- XJDNKRIXUMDJCW-UHFFFAOYSA-J titanium tetrachloride Chemical compound Cl[Ti](Cl)(Cl)Cl XJDNKRIXUMDJCW-UHFFFAOYSA-J 0.000 claims description 2
- 235000005074 zinc chloride Nutrition 0.000 claims description 2
- 239000011592 zinc chloride Substances 0.000 claims description 2
- 150000008301 phosphite esters Chemical class 0.000 claims 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 4
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 abstract description 3
- 230000003197 catalytic effect Effects 0.000 abstract description 3
- 230000001681 protective effect Effects 0.000 abstract description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 2
- 150000001875 compounds Chemical class 0.000 abstract description 2
- 229910052802 copper Inorganic materials 0.000 abstract description 2
- 239000010949 copper Substances 0.000 abstract description 2
- 230000008021 deposition Effects 0.000 abstract description 2
- 229910052742 iron Inorganic materials 0.000 abstract description 2
- 229910021645 metal ion Inorganic materials 0.000 abstract description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract 1
- 239000002775 capsule Substances 0.000 abstract 1
- 238000009833 condensation Methods 0.000 abstract 1
- 230000005494 condensation Effects 0.000 abstract 1
- 230000002401 inhibitory effect Effects 0.000 abstract 1
- 230000003647 oxidation Effects 0.000 abstract 1
- 238000007254 oxidation reaction Methods 0.000 abstract 1
- 229910052760 oxygen Inorganic materials 0.000 abstract 1
- 239000001301 oxygen Substances 0.000 abstract 1
- 230000000379 polymerizing effect Effects 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 27
- 239000010779 crude oil Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000002002 slurry Substances 0.000 description 6
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 239000000295 fuel oil Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- -1 salt compounds Chemical class 0.000 description 3
- PZRWFKGUFWPFID-UHFFFAOYSA-N 3,9-dioctadecoxy-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane Chemical compound C1OP(OCCCCCCCCCCCCCCCCCC)OCC21COP(OCCCCCCCCCCCCCCCCCC)OC2 PZRWFKGUFWPFID-UHFFFAOYSA-N 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000000571 coke Substances 0.000 description 2
- 238000006482 condensation reaction Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000005764 inhibitory process Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000000693 micelle Substances 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- WGKLOLBTFWFKOD-UHFFFAOYSA-N tris(2-nonylphenyl) phosphite Chemical compound CCCCCCCCCC1=CC=CC=C1OP(OC=1C(=CC=CC=1)CCCCCCCCC)OC1=CC=CC=C1CCCCCCCCC WGKLOLBTFWFKOD-UHFFFAOYSA-N 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000007983 Tris buffer Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000013522 chelant Substances 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- NFHFRUOZVGFOOS-UHFFFAOYSA-N palladium;triphenylphosphane Chemical compound [Pd].C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 NFHFRUOZVGFOOS-UHFFFAOYSA-N 0.000 description 1
- AQSJGOWTSHOLKH-UHFFFAOYSA-N phosphite(3-) Chemical class [O-]P([O-])[O-] AQSJGOWTSHOLKH-UHFFFAOYSA-N 0.000 description 1
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 150000003254 radicals Chemical group 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/68—Polyesters containing atoms other than carbon, hydrogen and oxygen
- C08G63/685—Polyesters containing atoms other than carbon, hydrogen and oxygen containing nitrogen
- C08G63/6852—Polyesters containing atoms other than carbon, hydrogen and oxygen containing nitrogen derived from hydroxy carboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G75/00—Inhibiting corrosion or fouling in apparatus for treatment or conversion of hydrocarbon oils, in general
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The invention provides a scale inhibitor for a high-temperature oil refining system, and a preparation method and application thereof, wherein the scale inhibitor comprises a triazole polymer obtained by esterifying and polymerizing 1-acetic acid-4- (1-hydroxycyclopentyl) -1,2, 3-triazole and purine containing hydroxyl, wherein the triazole polymer can form a micro cross-linked network in an oil system, form capsules with oxygen-containing compounds, and is dissolved in oil to prevent oxidation and condensation, thereby inhibiting scale deposition; the hydroxyl-containing purine can form a protective film layer on the side surface of equipment, and reduce or eliminate corrosion to the equipment. When hydroxyl groups in the scale inhibitor are oxidized at high temperature, carboxyl groups can form chelates with metal ions such as iron, copper and the like, so that the chelates lose the catalytic capability on polymerization reaction, and the generation of scale is reduced.
Description
Technical Field
The invention relates to the field of scale inhibition and corrosion prevention, in particular to a scale inhibitor for a high-temperature oil refining system, a preparation method and application thereof.
Background
The petroleum processing is a continuous large-scale production process, the processed grafts are crude oil or oil products containing impurities, and almost all the oil products need to be heated or cooled according to the requirements of the processing technology, and some settings are heated to high temperature of about 500 ℃. Thus, a layer of scale, either hard or soft, is formed on the surface of the refinery and pipeline. Such scaling phenomena are very common in the oil refining industry, such as heat exchangers, coolers, reactors, reboilers, heating furnaces, etc., during which the scale reduces the internal diameter of equipment, pipes, valves, reduces the process flow and heat transfer, limits the throughput of the plant, leads to increased power consumption, decreases the yield of the final product, shortens the start-up cycle, increases the maintenance costs, even presents huge accidents, affects the safe operation of the production plant, and the losses of scale to the production are huge. It is counted that more than 90% of the heat exchangers in refineries have different degrees of fouling problems. The loss of scaling in the United states oil refining industry has been estimated from energy consumption, yield reduction, and maintenance costs, and the like, and the loss of scaling-related whole-world oil refining industry costs up to $13 billion per year.
The scale can be divided into two types, namely organic scale and inorganic scale, and the chemical reaction of the organic scale on oil refining equipment and pipelines is formed into 4 types of free radical chain reaction, asphaltene condensation reaction, thermal conversion reaction and polymerization reaction, and in the high-temperature heavy oil processing device, the organic scale is mainly generated by the asphaltene condensation reaction and the thermal conversion reaction; the main reasons for the formation of inorganic scale are precipitation of salt compounds and deposition of impurity particles, the salt compounds are mainly brought by crude oil, and then certain acidic substances exist in the crude oil or the oil, which can cause certain corrosion to equipment and pipelines in the processes of storage, transportation and processing, corrosion products are generated, and inorganic salts and corrosion products carried by the crude oil can be precipitated and adhered to the surfaces of the equipment or the pipelines under certain conditions to form the inorganic scale. Since most of the inorganic salts are concentrated into normal slag and reduced slag during petroleum processing, inorganic salt precipitation is an important cause of these heavy oil fouls.
Thus, the problem of fouling of petroleum processing equipment and pipelines has become a major obstacle affecting the safe, smooth, long-term, full-load production operation of the apparatus, and it has been an urgent task to study scale inhibitors that are effective in preventing or reducing fouling.
Disclosure of Invention
Aiming at the scale formation reason, the invention provides a scale inhibitor for a high-temperature oil refining system, a preparation method and application thereof.
A scale inhibitor for a high-temperature oil refining system comprises 20-35% of a detergent dispersant, 1-8% of a corrosion inhibitor, 0.5-2% of an antioxidant and the balance of an organic solvent; wherein the detergent dispersant is triazole polymer prepared by taking 1-acetic acid-4- (1-hydroxycyclopentyl) -1,2, 3-triazole (CAS: 1402447-07-7) with a structure shown in formula I as a polymerization monomer, and the corrosion inhibitor is purine containing hydroxyl;。
in some embodiments of the invention, the hydroxyl-containing purine is at least one of adenine nucleoside and arabinoside.
In some embodiments of the present invention, the process for preparing the triazole polymer comprises the steps of: dissolving 1-acetic acid-4- (1-hydroxycyclopentyl) -1,2, 3-triazole in an organic solvent 1 under normal pressure, adding a catalyst, carrying out reflux reaction for 3-5h at 130-160 ℃, cooling the system, adding a salt solution for washing and layering, drying the organic phase to remove the solvent, dissolving with an organic solvent 2, and filtering to obtain the solution of the triazole polymer.
In some embodiments of the present invention, the organic solvent 1 is at least one of ethanol, dimethyl sulfoxide, dichloromethane, toluene, and xylene when preparing the triazole polymer.
In some embodiments of the present invention, the catalyst in preparing the triazole polymer is at least one of aluminum chloride, boron fluoride, stannous chloride, zinc chloride, titanium tetrachloride.
In some embodiments of the invention, the catalyst is added in an amount of 0.5 to 1% by mass of the total system of reactions in the preparation of the triazole polymer.
In some embodiments of the present invention, the organic solvent 2 is at least one of 1, 2-dimethoxypropane, dimethoxymethane, ethylene glycol dimethyl ether, tetrahydrofuran, and dimethyltetrahydrofuran in preparing the triazole polymer.
In some embodiments of the present invention, the antioxidant is at least one of phosphites, which may be, but is not limited to: tris (nonylphenyl) phosphite (TNP), tris (2, 4) -di-t-butylphenyl) phosphite (TBP), distearyl Pentaerythritol Diphosphite (DPD), tetrakis (2, 4-di-t-butylphenyl) -4,4' -biphenylenediphosphate, and the like.
In some embodiments of the invention, the solvent is a non-polar hydrocarbon solvent such as toluene, xylene, petroleum ether, paraffin oil, diesel oil, kerosene, and the like.
The mixing mass ratio of the purine to the triazole polymer in the scale inhibitor is 1-8:20-35. The purine is taken as a small molecular substance, and a protective film can be formed on the inner side of the pipe wall in an oil refining system by adding a proper amount of purine, so that the coke produced by crude oil at high temperature is prevented from being adsorbed and deposited on the pipe wall; however, if the dosage is too large, a micelle is formed with the triazole polymer, so that the adsorption and dispersion of the triazole polymer on pollutant particles are affected, and finally the scale inhibitor has a weakened protection effect on an oil refining system. The proportion can keep balance of the scale inhibitor effect, and the scale inhibitor effect of the whole device can be influenced by deviating from the proportion.
The scale inhibitor is prepared by mixing the detergent dispersant, the corrosion inhibitor, the antioxidant and the solvent according to a proper proportion, and is applied to a high-temperature oil refining system, wherein the application addition amount is 50-150ppm.
The beneficial effects are that: compared with the prior art, the scale inhibitor provided by the invention has the following advantages:
1, the hydroxyl-containing purine is alkalescent, can neutralize acidic substances in crude oil, is not strong in alkalinity and does not have corrosiveness to equipment, a protective film layer can be formed on the inner side of the device, corrosion of other substances in an oil refining system to the equipment is reduced or eliminated, and if hydroxyl groups contained in the hydroxyl-containing purine are oxidized at high temperature in the system, carboxyl groups can be finally formed to chelate metal ions such as iron, copper and the like, so that the carboxyl groups lose catalytic capability to polymerization reaction, the formation of organic high polymers is inhibited, and further the production of scale is reduced;
2, the triazole polymer molecular chain can form a micro cross-linking structure through hydrogen bonds among triazole rings, can well adsorb oil coke and other pollutants in a system, and form a 'load micelle', so that the pollutant particles are dispersed and suspended in oil, and are prevented from settling to form oil dirt;
3, in the scale inhibitor, one component can realize multiple effects, so that the production cost is reduced, the action efficiency is improved, and the heat exchange efficiency of the heat exchanger and the relative stability of pressure drop in the heat exchanger are ensured; and the triazole polymer contained in the composition is easy to biodegrade and is environment-friendly.
Detailed Description
The following description of the technical solutions in the embodiments of the present invention will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. 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 preparation of the triazole polymers used in the scale inhibitor is exemplified below:
triazole polymer-1
7.0g of 1-acetic acid-4- (1-hydroxycyclopentyl) -1,2, 3-triazole is dissolved in 50ml of dimethyl sulfoxide under normal pressure, 0.31g of stannous chloride is added, reflux reaction is carried out for 5 hours at 130 ℃, after the system is cooled, sodium chloride solution is added for washing and layering, organic phase is dried to remove solvent, and then dimethoxy methane is used for dissolving and filtering to obtain the solution of the triazole polymer.
Triazole polymer-2
10.0g of 1-acetic acid-4- (1-hydroxycyclopentyl) -1,2, 3-triazole is dissolved in 100ml of dimethyl sulfoxide under normal pressure, 0.60g of stannous chloride is added, reflux reaction is carried out for 3 hours at 150 ℃, after the system is cooled, sodium chloride solution is added for washing and layering, organic phase is dried to remove solvent, and then dimethoxy methane is used for dissolving and filtering to obtain the solution of the triazole polymer.
The detergent dispersant, the corrosion inhibitor, the antioxidant and the solvent are uniformly mixed to form the scale inhibitor, and the specific selection and the use proportion of the components in each example and comparative example are shown in Table 1:
the scale inhibitor obtained by mixing the raw materials in proportion according to the selection of the raw materials in Table 1 is applied to a heavy oil catalytic device of a petrochemical company in an addition amount of 100ppm, and the specific cases are as follows:
as can be seen from the data in table 2, the scale inhibitor provided by the invention can effectively reduce the viscosity of the slurry oil and the slurry oil quantity thrown outward, and can improve the yield of light oil and the circulation quantity of the slurry oil; in the same cycle period, the pressure drop at the inlet and outlet of the slurry oil heat exchanger is not increased along with the increase of the operation period, and is reduced by at least 0.052MPa, which indicates that the light of the outlet of the slurry oil pump and the light beam inner wall smoothness and the flow area of the heat exchanger system are improved; in the heat exchanger structure. Under the condition that the fluid performance and the operation parameters are not changed greatly, the total heat transfer coefficient of the heat exchanger is improved, which indicates that the dirt on the inner wall of the heat exchanger is effectively inhibited or/and removed, and the data of comparative examples 1-2 show that the use ratio of the triazole polymer and the purine has a certain negative influence on the use effect of the dirt inhibitor: the excessive use of purine can not only help to reduce the pressure drop and heat transfer coefficient of the inlet and outlet of the heat exchanger, but also can cause obstruction. From the results of comparative example 3, it is understood that a general low molecular weight polyamide compound cannot be used as an oil slurry scale inhibitor instead of the triazole polymer and a similar treatment effect is obtained.
In conclusion, the scale inhibitor provided by the invention can realize ideal scale inhibition effect in a high-temperature oil refining system, improves the crude oil processing efficiency, and has good economic benefit in the high-temperature oil refining field.
Claims (10)
1. High-grade steelThe scale inhibitor for the warm oil refining system is characterized by comprising 20-35% of detergent dispersant, 1-8% of corrosion inhibitor, 0.5-2% of antioxidant and the balance of organic solvent according to mass percent; the detergent dispersant is triazole polymer prepared by taking 1-acetic acid-4- (1-hydroxycyclopentyl) -1,2, 3-triazole with a structure shown in formula I as a polymerization monomer, and the corrosion inhibitor is purine containing hydroxyl;。
2. the scale inhibitor for high temperature oil refining system according to claim 1, wherein the hydroxyl group-containing purine is at least one of adenine nucleoside and arabinoside.
3. The scale inhibitor for high temperature oil refining system according to claim 1, wherein the preparation process of the triazole polymer comprises the following steps: dissolving 1-acetic acid-4- (1-hydroxycyclopentyl) -1,2, 3-triazole in an organic solvent 1 under normal pressure, adding a catalyst, carrying out reflux reaction for 3-5h at 130-160 ℃, cooling the system, adding a salt solution for washing and layering, drying the organic phase to remove the solvent, dissolving with an organic solvent 2, and filtering to obtain the solution of the triazole polymer.
4. The scale inhibitor for high temperature oil refining system according to claim 3, wherein the organic solvent 1 is at least one of ethanol, dimethyl sulfoxide, methylene chloride, toluene, and xylene.
5. A scale inhibitor for a high temperature oil refining system according to claim 3, wherein the catalyst is at least one of aluminum chloride, boron fluoride, stannous chloride, zinc chloride, titanium tetrachloride.
6. The scale inhibitor for high temperature oil refining system according to claim 5, wherein the catalyst is added in an amount of 0.5-1% by mass of the total system.
7. A scale inhibitor for a high temperature oil refinery system according to claim 3, wherein said organic solvent 2 is at least one of 1, 2-dimethoxypropane, dimethoxymethane, ethylene glycol dimethyl ether, tetrahydrofuran and dimethyl tetrahydrofuran.
8. The scale inhibitor for high-temperature oil refining system according to claim 1, wherein the antioxidant is at least one of phosphite esters.
9. The scale inhibitor for high temperature oil refining system according to claim 1, wherein the organic solvent is at least one of toluene, xylene, petroleum ether, paraffin oil, diesel oil, and kerosene.
10. The scale inhibitor for high temperature oil refining system according to any one of claims 1 to 9, wherein the addition amount is 50 to 150ppm.
Priority Applications (1)
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| WO2020143040A1 (en) * | 2019-01-11 | 2020-07-16 | 黄华成 | Tryptophan derivative and use thereof |
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