CN116376599A - Efficient and environment-friendly scale inhibitor for ethylene device gasoline stripping tower and preparation method thereof - Google Patents
Efficient and environment-friendly scale inhibitor for ethylene device gasoline stripping tower and preparation method thereof Download PDFInfo
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- CN116376599A CN116376599A CN202310577370.0A CN202310577370A CN116376599A CN 116376599 A CN116376599 A CN 116376599A CN 202310577370 A CN202310577370 A CN 202310577370A CN 116376599 A CN116376599 A CN 116376599A
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- Prior art keywords
- scale inhibitor
- hydroxylamine
- scale
- butyl
- acid
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- 239000002455 scale inhibitor Substances 0.000 title claims abstract description 60
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 title claims abstract description 24
- 239000005977 Ethylene Substances 0.000 title claims abstract description 24
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- 238000006116 polymerization reaction Methods 0.000 claims abstract description 32
- 239000003112 inhibitor Substances 0.000 claims abstract description 28
- 239000002904 solvent Substances 0.000 claims abstract description 19
- AVXURJPOCDRRFD-UHFFFAOYSA-N Hydroxylamine Chemical compound ON AVXURJPOCDRRFD-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 11
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 11
- 150000004982 aromatic amines Chemical class 0.000 claims abstract description 9
- 239000002270 dispersing agent Substances 0.000 claims abstract description 8
- 239000006078 metal deactivator Substances 0.000 claims abstract 3
- DMBHHRLKUKUOEG-UHFFFAOYSA-N diphenylamine Chemical compound C=1C=CC=CC=1NC1=CC=CC=C1 DMBHHRLKUKUOEG-UHFFFAOYSA-N 0.000 claims description 12
- 229920002125 Sokalan® Polymers 0.000 claims description 9
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 claims description 9
- 239000004584 polyacrylic acid Substances 0.000 claims description 9
- 229920001444 polymaleic acid Polymers 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 7
- JBYWTKPHBLYYFJ-UHFFFAOYSA-N 2,6-ditert-butyl-4-(2-methylpropyl)phenol Chemical compound CC(C)CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 JBYWTKPHBLYYFJ-UHFFFAOYSA-N 0.000 claims description 6
- WJQOZHYUIDYNHM-UHFFFAOYSA-N 2-tert-Butylphenol Chemical compound CC(C)(C)C1=CC=CC=C1O WJQOZHYUIDYNHM-UHFFFAOYSA-N 0.000 claims description 6
- 229920002126 Acrylic acid copolymer Polymers 0.000 claims description 6
- NLZUEZXRPGMBCV-UHFFFAOYSA-N Butylhydroxytoluene Chemical compound CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 NLZUEZXRPGMBCV-UHFFFAOYSA-N 0.000 claims description 6
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 claims description 6
- 229920001174 Diethylhydroxylamine Polymers 0.000 claims description 6
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 claims description 6
- HFACYLZERDEVSX-UHFFFAOYSA-N benzidine Chemical compound C1=CC(N)=CC=C1C1=CC=C(N)C=C1 HFACYLZERDEVSX-UHFFFAOYSA-N 0.000 claims description 6
- 229920001577 copolymer Polymers 0.000 claims description 6
- FVCOIAYSJZGECG-UHFFFAOYSA-N diethylhydroxylamine Chemical compound CCN(O)CC FVCOIAYSJZGECG-UHFFFAOYSA-N 0.000 claims description 6
- 239000003350 kerosene Substances 0.000 claims description 6
- 239000011976 maleic acid Substances 0.000 claims description 6
- OQAIUHLITJGRMM-UHFFFAOYSA-N n,n-di(propan-2-yl)hydroxylamine Chemical compound CC(C)N(O)C(C)C OQAIUHLITJGRMM-UHFFFAOYSA-N 0.000 claims description 6
- RZXMPPFPUUCRFN-UHFFFAOYSA-N p-toluidine Chemical compound CC1=CC=C(N)C=C1 RZXMPPFPUUCRFN-UHFFFAOYSA-N 0.000 claims description 6
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 claims description 6
- BVUXDWXKPROUDO-UHFFFAOYSA-N 2,6-di-tert-butyl-4-ethylphenol Chemical compound CCC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 BVUXDWXKPROUDO-UHFFFAOYSA-N 0.000 claims description 5
- 235000010354 butylated hydroxytoluene Nutrition 0.000 claims description 5
- 239000004215 Carbon black (E152) Substances 0.000 claims description 4
- 229930195733 hydrocarbon Natural products 0.000 claims description 4
- 150000002430 hydrocarbons Chemical class 0.000 claims description 4
- CBCKQZAAMUWICA-UHFFFAOYSA-N 1,4-phenylenediamine Chemical compound NC1=CC=C(N)C=C1 CBCKQZAAMUWICA-UHFFFAOYSA-N 0.000 claims description 3
- OPLCSTZDXXUYDU-UHFFFAOYSA-N 2,4-dimethyl-6-tert-butylphenol Chemical compound CC1=CC(C)=C(O)C(C(C)(C)C)=C1 OPLCSTZDXXUYDU-UHFFFAOYSA-N 0.000 claims description 3
- DKCPKDPYUFEZCP-UHFFFAOYSA-N 2,6-di-tert-butylphenol Chemical compound CC(C)(C)C1=CC=CC(C(C)(C)C)=C1O DKCPKDPYUFEZCP-UHFFFAOYSA-N 0.000 claims description 3
- FRAQIHUDFAFXHT-UHFFFAOYSA-N 2,6-dicyclopentyl-4-methylphenol Chemical compound OC=1C(C2CCCC2)=CC(C)=CC=1C1CCCC1 FRAQIHUDFAFXHT-UHFFFAOYSA-N 0.000 claims description 3
- XFOINHPEDKCHJD-UHFFFAOYSA-N 3-(hydroxyamino)propane-1,1-diol Chemical compound ONCCC(O)O XFOINHPEDKCHJD-UHFFFAOYSA-N 0.000 claims description 3
- WTWGHNZAQVTLSQ-UHFFFAOYSA-N 4-butyl-2,6-ditert-butylphenol Chemical compound CCCCC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 WTWGHNZAQVTLSQ-UHFFFAOYSA-N 0.000 claims description 3
- AFBPFSWMIHJQDM-UHFFFAOYSA-N N-methyl-N-phenylamine Natural products CNC1=CC=CC=C1 AFBPFSWMIHJQDM-UHFFFAOYSA-N 0.000 claims description 3
- 239000002283 diesel fuel Substances 0.000 claims description 3
- VDUIPQNXOQMTBF-UHFFFAOYSA-N n-ethylhydroxylamine Chemical compound CCNO VDUIPQNXOQMTBF-UHFFFAOYSA-N 0.000 claims description 3
- ODHYIQOBTIWVRZ-UHFFFAOYSA-N n-propan-2-ylhydroxylamine Chemical compound CC(C)NO ODHYIQOBTIWVRZ-UHFFFAOYSA-N 0.000 claims description 3
- 150000003863 ammonium salts Chemical class 0.000 claims 3
- WBIQQQGBSDOWNP-UHFFFAOYSA-N 2-dodecylbenzenesulfonic acid Chemical class CCCCCCCCCCCCC1=CC=CC=C1S(O)(=O)=O WBIQQQGBSDOWNP-UHFFFAOYSA-N 0.000 claims 1
- LZQMCUIWYRQLOG-UHFFFAOYSA-N 4-tert-butylbenzenesulfonic acid Chemical class CC(C)(C)C1=CC=C(S(O)(=O)=O)C=C1 LZQMCUIWYRQLOG-UHFFFAOYSA-N 0.000 claims 1
- SRSXLGNVWSONIS-UHFFFAOYSA-N benzenesulfonic acid Chemical class OS(=O)(=O)C1=CC=CC=C1 SRSXLGNVWSONIS-UHFFFAOYSA-N 0.000 claims 1
- 229940092714 benzenesulfonic acid Drugs 0.000 claims 1
- 229940060296 dodecylbenzenesulfonic acid Drugs 0.000 claims 1
- 230000005764 inhibitory process Effects 0.000 abstract description 22
- 230000000694 effects Effects 0.000 description 13
- 239000002184 metal Substances 0.000 description 7
- -1 hydroxylamine compound Chemical class 0.000 description 6
- 238000012546 transfer Methods 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- WJFKNYWRSNBZNX-UHFFFAOYSA-N 10H-phenothiazine Chemical compound C1=CC=C2NC3=CC=CC=C3SC2=C1 WJFKNYWRSNBZNX-UHFFFAOYSA-N 0.000 description 4
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 4
- WWLOCCUNZXBJFR-UHFFFAOYSA-N azanium;benzenesulfonate Chemical compound [NH4+].[O-]S(=O)(=O)C1=CC=CC=C1 WWLOCCUNZXBJFR-UHFFFAOYSA-N 0.000 description 4
- 238000013329 compounding Methods 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000002530 phenolic antioxidant Substances 0.000 description 3
- YBYIRNPNPLQARY-UHFFFAOYSA-N 1H-indene Chemical compound C1=CC=C2CC=CC2=C1 YBYIRNPNPLQARY-UHFFFAOYSA-N 0.000 description 2
- PLUHAVSIMCXBEX-UHFFFAOYSA-N azane;dodecyl benzenesulfonate Chemical compound N.CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 PLUHAVSIMCXBEX-UHFFFAOYSA-N 0.000 description 2
- 229940077388 benzenesulfonate Drugs 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- 229910019142 PO4 Inorganic materials 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 230000003064 anti-oxidating effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 150000001925 cycloalkenes Chemical class 0.000 description 1
- 150000001993 dienes Chemical class 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000005984 hydrogenation reaction Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 150000003254 radicals Chemical class 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- C10G75/04—Inhibiting corrosion or fouling in apparatus for treatment or conversion of hydrocarbon oils, in general by addition of antifouling agents
-
- 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
- C10G7/00—Distillation of hydrocarbon oils
- C10G7/02—Stabilising gasoline by removing gases by fractioning
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/52—Improvements relating to the production of bulk chemicals using catalysts, e.g. selective catalysts
Landscapes
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The invention relates to a scale inhibitor and a preparation method thereof, in particular to a high-efficiency and environment-friendly scale inhibitor for a gasoline stripping tower of an ethylene device and a preparation method thereof, comprising the following components in parts by mass: 2-15 parts of antioxidant, 2-15 parts of aromatic amine polymerization inhibitor, 4-16 parts of hydroxylamine polymerization inhibitor, 10-20 parts of metal deactivator, 10-40 parts of dispersant and 20-50 parts of solvent; the scale inhibitor can greatly improve the polymerization inhibition performance, further improve the scale inhibition performance of the scale inhibitor and ensure the good operation of a gasoline stripping tower of an ethylene device.
Description
Technical Field
The invention relates to a scale inhibitor and a preparation method thereof, in particular to a high-efficiency and environment-friendly scale inhibitor for a gasoline stripping tower of an ethylene device and a preparation method thereof.
Background
The effect of the gasoline stripping tower of the ethylene device is to strip hydrocarbon light components in pyrolysis gasoline and compressor condensate, and the operation of the gasoline stripping tower directly affects the load of the whole ethylene device. Because the feed contains more unsaturated compounds such as styrene, diene, cycloolefin, indene and the like, the scale formation of a tower plate and a tower kettle reboiler is easy to be caused under the action of high temperature, the stable operation of a gasoline stripping tower can be influenced after the scale formation of the tower plate and the reboiler, and the normal operation of a gasoline hydrogenation unit is further influenced.
Various solutions are proposed for the problems at home and abroad, and most commonly, a scale inhibitor is added, for example, patent CN101700991A discloses a high-efficiency scale inhibitor for a tail gas compressor of a styrene device, which consists of a component A, a component B and a component C, and is characterized in that: the mass ratio of the component A to the component B to the component C is 1-8:1-8:1-8; wherein: the component A is hydroxylamine compound; the component B is an alcohol amine compound; the component C is a phenolic compound. However, the existing scale inhibitors often have the problems of poor effect or instability, and poor suitability for a gasoline stripping tower system, and further, the scale inhibitors with better effects are required to be developed.
Disclosure of Invention
In order to solve the problems, the invention provides an efficient and environment-friendly scale inhibitor for an ethylene unit gasoline stripper, which comprises the following components in parts by mass:
preferably, the scale inhibitor comprises the following components in parts by mass:
wherein the antioxidant comprises one or more of 2, 6-di-tert-butyl-p-cresol, 2, 6-di-tert-butylphenol, 2-tert-butyl-4, 6-dimethylphenol, 2, 6-di-tert-butyl-4-ethylphenol, 2, 6-di-tert-butyl-4-n-butylphenol, 2, 6-di-tert-butyl-4-isobutylphenol, 2, 6-dicyclopentyl-4-methylphenol and o-tert-butylphenol; preferably one or more of 2, 6-di-tert-butyl-p-cresol, 2, 6-di-tert-butyl-4-isobutylphenol and o-tert-butylphenol.
The arylamine polymerization inhibitor is selected from one or more of p-toluidine, benzidine, p-phenylenediamine, diphenylamine and thiodiphenylamine, preferably one or more of diphenylamine, benzidine and thiodiphenylamine.
The hydroxylamine polymerization inhibitor is selected from one or more of ethylhydroxylamine, diethylhydroxylamine, isopropylhydroxylamine, diisopropylhydroxylamine, dihydroxypropylhydroxylamine and 2, 6-tetramethyl-4-hydroxypiperidine hydroxylamine, preferably one or more of diethylhydroxylamine, diisopropylhydroxylamine, 2, 6-tetramethyl-4-hydroxypiperidine hydroxylamine.
The metal passivating agent is selected from one or two of ammonium benzene sulfonate, preferably ammonium p-tert-butyl benzene sulfonate and ammonium dodecyl benzene sulfonate.
The dispersing agent is one or more selected from polyacrylic acid, acrylic acid copolymer, polymaleic acid and maleic acid copolymer; preferably one or more of polyacrylic acid with a number average molecular weight of 2000-4000, acrylic acid copolymer with a number average molecular weight of 1000-3000, polymaleic acid with a number average molecular weight of 1000-4000, and maleic acid copolymer with a number average molecular weight of 1000-4000; further preferable is one or both of polyacrylic acid having a number average molecular weight of 2500 to 3500 and polymaleic acid having a number average molecular weight of 2000 to 3000.
The solvent is selected from one or more of hydrocarbon solvents, preferably hexane, cyclohexane, kerosene, diesel oil, raffinate oil and 200# solvent oil; further preferred are one or more of cyclohexane, kerosene, and 200# solvent oil.
The invention screens out proper weight ratio of the antioxidant, the compound polymerization inhibitor and the metal passivator aiming at the ethylene device gasoline stripping tower, so that a synergistic effect is generated among the three substances, and a stronger scale inhibition effect on the ethylene device gasoline stripping tower is realized. The invention can achieve better effect by using a plurality of polymerization inhibitors for compounding through formula screening, and the arylamine polymerization inhibitor is a common molecular polymerization inhibitor, can consume trace oxygen existing in a system and has an antioxidation effect. Hydroxylamine polymerization inhibitor can inhibit polymerization reaction and can react with peroxy free radical in corresponding process. Hydroxylamine can also act as a polymerization inhibitor by generating nitroxide radicals to undergo a chain termination reaction with the chain radicals. The invention uses the combination of the two components and the phenolic antioxidant, can greatly improve the polymerization inhibition performance and further improve the scale inhibition performance of the scale inhibitor.
In addition, the ammonium benzenesulfonate is used as a metal passivating agent to replace the common phosphate passivating agent (phosphite) and avoid the pollution of phosphorus to the environment, so that the scale inhibitor of the gasoline stripping tower is more environment-friendly in actual use.
The invention also provides a preparation method of the scale inhibitor for the ethylene unit gasoline stripping tower, which comprises the following steps:
the components are uniformly mixed according to the formula.
Preferably, the antioxidant, the polymerization inhibitor, the metal passivator, the dispersing agent and the solvent are mixed, heated and dissolved.
Preferably, the dissolved scale inhibitor is cooled to room temperature and then filtered.
The invention also provides application of the scale inhibitor for the ethylene device gasoline stripping tower, which is used in the ethylene device gasoline stripping tower, improves the scale formation of the gasoline stripping tower and prolongs the operation period of equipment.
Wherein, the addition amount of the scale inhibitor is 1-500ppm, preferably 10-100ppm, more preferably 20-80ppm based on the gasoline stripper material.
In addition, the invention also provides a use method of the scale inhibitor for the ethylene unit gasoline stripping tower, which comprises the following steps:
adding the scale inhibitor into the feeding of a gasoline stripping tower.
Of course, the scale inhibitor may be dissolved in the other solvent first, or it may be pre-mixed with a small portion of the feed.
Compared with the prior art, the scale inhibitor for the ethylene unit gasoline stripping tower has the following beneficial effects:
(1) The invention can achieve better effect by repeatedly screening the formula and compounding a plurality of polymerization inhibitors, and the invention can greatly improve the polymerization inhibition performance by compounding the arylamine polymerization inhibitor and the hydroxylamine polymerization inhibitor and matching the use of the phenol antioxidant, thereby improving the scale inhibition performance of the scale inhibitor and ensuring the good operation of the gasoline stripping tower of the ethylene device.
(2) The scale inhibitor has the advantages of environmental protection on the basis of high-efficiency scale inhibition, no use of phosphide, environmental protection and no negative influence on a water system, and uses benzenesulfonic acid ammonium salt.
(3) The invention uses a simple formula to compound an antioxidant, a polymerization inhibitor, a metal passivator and the like, has a scale inhibition rate of about 98 percent, is simple to use, can obviously improve the scale of a gasoline stripping tower, prolongs the operation period of equipment and reduces the cost.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely, and it is apparent 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 invention provides a high-efficiency environment-friendly scale inhibitor for a gasoline stripper of an ethylene unit, which comprises the following components in parts by mass:
preferably, the scale inhibitor comprises the following components in parts by mass:
wherein the antioxidant comprises one or more of 2, 6-di-tert-butyl-p-cresol, 2, 6-di-tert-butylphenol, 2-tert-butyl-4, 6-dimethylphenol, 2, 6-di-tert-butyl-4-ethylphenol, 2, 6-di-tert-butyl-4-n-butylphenol, 2, 6-di-tert-butyl-4-isobutylphenol, 2, 6-dicyclopentyl-4-methylphenol and o-tert-butylphenol; preferably one or more of 2, 6-di-tert-butyl-p-cresol, 2, 6-di-tert-butyl-4-isobutylphenol and o-tert-butylphenol.
The arylamine polymerization inhibitor is selected from one or more of p-toluidine, benzidine, p-phenylenediamine, diphenylamine and thiodiphenylamine, preferably one or more of diphenylamine, benzidine and thiodiphenylamine.
The hydroxylamine polymerization inhibitor is selected from one or more of ethylhydroxylamine, diethylhydroxylamine, isopropylhydroxylamine, diisopropylhydroxylamine, dihydroxypropylhydroxylamine and 2, 6-tetramethyl-4-hydroxypiperidine hydroxylamine, preferably one or more of diethylhydroxylamine, diisopropylhydroxylamine, 2, 6-tetramethyl-4-hydroxypiperidine hydroxylamine.
The metal passivating agent is selected from one or two of ammonium benzene sulfonate, preferably ammonium p-tert-butyl benzene sulfonate and ammonium dodecyl benzene sulfonate.
The dispersing agent is one or more selected from polyacrylic acid, acrylic acid copolymer, polymaleic acid and maleic acid copolymer; preferably one or more of polyacrylic acid with a number average molecular weight of 2000-4000, acrylic acid copolymer with a number average molecular weight of 1000-3000, polymaleic acid with a number average molecular weight of 1000-4000, and maleic acid copolymer with a number average molecular weight of 1000-4000; further preferable is one or both of polyacrylic acid having a number average molecular weight of 2500 to 3500 and polymaleic acid having a number average molecular weight of 2000 to 3000.
The solvent is selected from one or more of hydrocarbon solvents, preferably hexane, cyclohexane, kerosene, diesel oil, raffinate oil and 200# solvent oil; further preferred are one or more of cyclohexane, kerosene, and 200# solvent oil.
The invention also provides a preparation method of the scale inhibitor for the ethylene unit gasoline stripping tower, which comprises the following steps:
the components are uniformly mixed according to the formula.
Preferably, the antioxidant, the polymerization inhibitor, the metal passivator, the dispersing agent and the solvent are mixed, heated and dissolved.
Preferably, the dissolved scale inhibitor is cooled to room temperature and then filtered.
The invention also provides application of the scale inhibitor for the ethylene device gasoline stripping tower, which is used in the ethylene device gasoline stripping tower, improves the scale formation of the gasoline stripping tower and prolongs the operation period of equipment.
Wherein, the addition amount of the scale inhibitor is 1-500ppm, preferably 10-100ppm, more preferably 20-80ppm based on the gasoline stripper material.
In addition, the invention also provides a use method of the scale inhibitor for the ethylene unit gasoline stripping tower, which comprises the following steps:
adding the scale inhibitor into the feeding of a gasoline stripping tower.
Of course, the scale inhibitor may be dissolved in the other solvent first, or it may be pre-mixed with a small portion of the feed.
Examples 1 to 14, comparative examples 1 to 5
The scale inhibitor for the gasoline stripper of the high-efficiency environment-friendly ethylene unit in examples 1-14 and comparative examples 1-5 is prepared by the following steps:
mixing antioxidant, polymerization inhibitor, stripping agent, dispersant and solvent, heating to dissolve solid components, cooling to room temperature, and filtering to obtain the final product.
TABLE 1
TABLE 2
TABLE 3 Table 3
Performance test:
the scale inhibition performance of the scale inhibitors prepared in example 1, 14 and comparative example 15 was tested respectively.
The scale inhibition performance evaluation method of the scale inhibitor is obtained according to the principle of heat transfer science: in the principle of heat transfer, a heat pipe is adopted, so that the feed continuously flows in the heat pipe, and at the beginning, the total heat transfer resistance is only the heat transfer resistance of the pipe wall of the heat pipe because the feed is not scaled in the heat pipe; with the extension of the running time, the scale is deposited on the surface of the heat pipe continuously, a scale layer is formed, the heat transfer is prevented, and the total heat transfer resistance is the sum of the heat resistance of the pipe wall and the heat resistance of the scale.
If the feed composition, flow rate and inlet temperature are kept constant, the feed outlet temperature will decrease as scale forms on the inner walls of the heat pipe, and the addition of the scale inhibitor will reduce the formation of scale, thereby reducing the magnitude of the decrease in outlet temperature. The scale inhibition effects of different scale inhibitors are different, so that the temperatures of the feed outlets are different, and the feed outlets with good scale inhibition effects are obviously high; otherwise, the temperature of the feeding outlet is low, so that the purpose of evaluating the performance of the scale inhibitor is achieved.
According to the principle, the scale inhibition performance of the prepared scale inhibitor is tested by a method for evaluating the scale inhibition rate of the scale inhibitor, and the specific testing method comprises the following steps: the method comprises the steps of inputting feeding into a heat pipe by using a metering pump for a laboratory, heating the heat pipe by using an electric heating wire, controlling the heating temperature, keeping the temperature of the outer wall of the heat pipe constant, testing the temperature of a feeding opening and a feeding outlet of the heat pipe by using a thermocouple, and enabling the feeding to flow out of the heat pipe without recycling, wherein the scale inhibition effect of a scale inhibitor is represented by a scale inhibition rate A:
wherein T is 0t T is the temperature of the feed outlet for T hours without addition of scale inhibitor t For T hours after the addition of the scale inhibitor, T Outer part Is the temperature of the outer wall of the heat pipe.
In the test, the addition amount of the scale inhibitor is 50ppm, the temperature of a feeding inlet is 60 ℃, the temperature of the outer wall of a heat pipe is 80 ℃, the feeding flow is 100mL/min, and the test time is 24 hours; the test results are shown in Table 4.
Table 4:
as can be seen from the above table, the scale inhibition ratios of examples 1 to 14 are better than those of comparative examples 1 to 5, indicating that the scale inhibitors of the respective formulations can exert good scale inhibition effects. As can be seen from comparative examples 1-2, the scale inhibition effect is greatly reduced without adding the arylamine polymerization inhibitor or the hydroxylamine polymerization inhibitor, which indicates that the synergistic effect of improving the scale inhibition can be realized by the cooperation of the arylamine polymerization inhibitor, the hydroxylamine polymerization inhibitor and the phenolic antioxidant.
From examples 13 to 14, better scale inhibition effect can be achieved with the proportion of the arylamine polymerization inhibitor, the hydroxylamine polymerization inhibitor and the phenolic antioxidant in the examples.
In addition, the scale inhibitor prepared according to the formula of the invention is practically used in a gasoline stripper of an ethylene industrial device, and the operation period of the gasoline stripper can be obviously prolonged.
Of course, those skilled in the art will appreciate that the above-described embodiments are merely some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art without making any inventive effort, are intended to be within the scope of the present invention based on the above embodiments.
Claims (10)
1. The efficient and environment-friendly scale inhibitor for the gasoline stripper of the ethylene device is technically characterized by comprising the following components in parts by mass:
2. the scale inhibitor according to claim 1, characterized in that the scale inhibitor comprises the following components in parts by mass:
3. the scale inhibitor according to claim 1, wherein the antioxidant comprises one or more of 2, 6-di-t-butyl-p-cresol, 2, 6-di-t-butylphenol, 2-t-butyl-4, 6-dimethylphenol, 2, 6-di-t-butyl-4-ethylphenol, 2, 6-di-t-butyl-4-n-butylphenol, 2, 6-di-t-butyl-4-isobutylphenol, 2, 6-dicyclopentyl-4-methylphenol and o-t-butylphenol; preferably one or more of 2, 6-di-tert-butyl-p-cresol, 2, 6-di-tert-butyl-4-isobutylphenol and o-tert-butylphenol.
4. The scale inhibitor according to claim 1, wherein the aromatic amine polymerization inhibitor is selected from one or more of p-toluidine, benzidine, p-phenylenediamine, diphenylamine, thiodiglyciline, preferably one or more of diphenylamine, benzidine, thiodiglyciline.
5. The scale inhibitor according to claim 1, wherein the hydroxylamine polymerization inhibitor is selected from one or more of ethyl hydroxylamine, diethyl hydroxylamine, isopropyl hydroxylamine, diisopropyl hydroxylamine, dihydroxypropyl hydroxylamine and 2, 6-tetramethyl-4-hydroxypiperidine hydroxylamine, preferably one or more of diethyl hydroxylamine, diisopropyl hydroxylamine, 2, 6-tetramethyl-4-hydroxypiperidine hydroxylamine.
6. The scale inhibitor according to claim 1, wherein the metal deactivator is selected from one or two of ammonium salts of benzenesulfonic acid, preferably ammonium salts of p-tert-butylbenzenesulfonic acid and ammonium salts of dodecylbenzenesulfonic acid.
7. The scale inhibitor according to claim 1, wherein the dispersant is one or more selected from the group consisting of polyacrylic acid, acrylic acid copolymers, polymaleic acid, and maleic acid copolymers; preferably one or more of polyacrylic acid with a number average molecular weight of 2000-4000, acrylic acid copolymer with a number average molecular weight of 1000-3000, polymaleic acid with a number average molecular weight of 1000-4000, and maleic acid copolymer with a number average molecular weight of 1000-4000; further preferable is one or both of polyacrylic acid having a number average molecular weight of 2500 to 3500 and polymaleic acid having a number average molecular weight of 2000 to 3000.
8. The scale inhibitor according to claim 1, wherein the solvent is selected from one or more of hydrocarbon solvents, preferably hexane, cyclohexane, kerosene, diesel oil, raffinate oil and 200# solvent oil; further preferred are one or more of cyclohexane, kerosene, and 200# solvent oil.
9. The method for preparing a scale inhibitor according to any one of claims 1 to 8, characterized in that the method comprises the steps of:
the components are uniformly mixed according to the formula.
10. The preparation method according to claim 9, wherein preferably, the antioxidant, the polymerization inhibitor, the metal deactivator, the dispersant and the solvent are mixed, heated and dissolved; and/or the number of the groups of groups,
the dissolved scale inhibitor was cooled to room temperature and then filtered.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101838552A (en) * | 2009-12-31 | 2010-09-22 | 上海良田化工有限公司 | Scale inhibitor of ethylene device compressor and using method thereof |
| CN105273741A (en) * | 2015-01-22 | 2016-01-27 | 上海良田化工有限公司 | Ethylene device gasoline stripping tower scale inhibitor, preparation method and usage method |
| CN106745843A (en) * | 2016-11-30 | 2017-05-31 | 江苏经纬技术创新咨询有限公司 | A kind of scale inhibitor of ethylene device compressor and preparation method thereof |
| CN115232025A (en) * | 2022-07-04 | 2022-10-25 | 浙江汉景环保化学材料科技有限公司 | Polymerization inhibitor for acrylonitrile production device |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101838552A (en) * | 2009-12-31 | 2010-09-22 | 上海良田化工有限公司 | Scale inhibitor of ethylene device compressor and using method thereof |
| CN105273741A (en) * | 2015-01-22 | 2016-01-27 | 上海良田化工有限公司 | Ethylene device gasoline stripping tower scale inhibitor, preparation method and usage method |
| CN106745843A (en) * | 2016-11-30 | 2017-05-31 | 江苏经纬技术创新咨询有限公司 | A kind of scale inhibitor of ethylene device compressor and preparation method thereof |
| CN115232025A (en) * | 2022-07-04 | 2022-10-25 | 浙江汉景环保化学材料科技有限公司 | Polymerization inhibitor for acrylonitrile production device |
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