CN105038841A - Method for catalyzing fuel oil oxidation desulphurization by polyether type oxovanadium heteropolyacid ionic liquid - Google Patents

Method for catalyzing fuel oil oxidation desulphurization by polyether type oxovanadium heteropolyacid ionic liquid Download PDF

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CN105038841A
CN105038841A CN201510389950.2A CN201510389950A CN105038841A CN 105038841 A CN105038841 A CN 105038841A CN 201510389950 A CN201510389950 A CN 201510389950A CN 105038841 A CN105038841 A CN 105038841A
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fuel oil
catalyzer
catalyst
temperature
toluene
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解从霞
于凤丽
袁冰
于世涛
侯付国
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Qingdao University of Science and Technology
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Qingdao University of Science and Technology
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Abstract

The invention relates to a method for catalyzing fuel oil O2 oxidation desulphurization The method adopting a polyether type oxovanadium heteropolyacid ionic liquid as a catalyst comprises the following steps: adding the catalyst, sulfur-containing fuel oil and a temperature control solvent toluene to an autoclave according to a molar ratio of the catalyst to the sulfide of 1:1.6-4.8 and a volume ratio of toluene to the fuel oil of 1:1.5-2.0, introducing oxygen to make pressure be 0.6-1.2MPa, and reacting at a temperature of 80-120DEG C for 0.5-2.5h. Compared with traditional methods, the method provided by the invention has the following advantages: 1, the catalyst simultaneously has two high-valence metals, so the oxidation catalysis ability is strong; 2, the catalyst has a temperature control chain, so a catalysis system has the characteristics of high-temperature homogeneous reaction and low-temperature separation of two phases, and also has the advantages of high homogeneous reaction catalytic activity, and easy separation of the catalyst and a product in a heterogeneous reaction; 3, the catalyst has stable performances, and the cycle use efficiency of the catalyst is high; and 4, the method is an environmentally friendly process route.

Description

The method of the ionic liquid-catalyzed fuel oil oxidation sweetening of a kind of polyether-type vanadyl heteropolyacid
Technical field
The present invention relates to environmental friendly catalysis field, specifically utilize a kind of method that polyether-type vanadyl heteropolyacid ionic liquid is catalyst fuel oil oxidation sweetening.
Background technology
The SOx that oil inflame gives off is one of important factor causing topsoil, and countries in the world have promulgated strict fuel oil sulfur-bearing standard in succession.At present, developed country performs Europe V standard just in succession, and namely sulphur content is lower than 10 μ g/g.Although China has also issued the state V standard identical with Europe V, at present still at execution state IV standards, namely sulphur content has been 50 μ g/g.Although current commercially available petrol and diesel oil is stripped of mercaptan, thioether sulfides wherein through Catalytic Hydrogenation Techniques, still containing thiophene, thionaphthene and dibenzothiophene class sulfide that micro-difficulty removes in oil product.Therefore, realize the target that China's petrol and diesel oil sulphur content reaches Europe V standard, key is to remove above-mentioned thiophene-type sulfide how efficiently.
In current existing non-hydrodesulfurization, the most potential desulfurization technology is catalytic oxidation desulfurization.Catalytic oxidation desulfurization technology is under the catalysis of catalyzer, utilize oxygenant by polarity for the sulfide-oxidation in oil product large sulfone, sulfoxide, recycling fuel oil and sulfone, feature that sulfoxide polarity gap is large, by extracting or adsorbing, isolate sulfone, sulfoxide, thus reach the object of desulfurization.Therefore, oxidation sweetening more easily removes in hydrogenating desulfurization, be difficult to removal thionaphthene and dibenzothiophene class sulfide.
In current existing catalytic oxidation desulfurization technology, with hydrogen peroxide (H 2o 2) technology the most ripe (Ind.Eng.Chem.Res., 2010,49,11760 of making oxygenant; Ind.Eng.Chem.Res., 2010,49,8998; Chem.Eur.J., 2012,18,4775; EnergyFuels, 2014,28,2754; CN104689850A; CN104312621A; CN103666536A; CN103333711A).Due to O 2or air is that oxygenant can overcome H 2o 2be heated and the intrinsic shortcoming such as easily decompose, be considered to a kind of rising eco-friendly fuel desulfuration technology.But, with O 2or air is oxygenant, its oxidation activity comparatively H 2o 2relatively low, need to carry out under the catalysis of catalyzer, sometimes also need the existence of co-oxidation sacrifice agent aldehyde.The O of catalysis 2oxidation sweetening has document and patent report (Fuelprocessingtechnology, 2009,90,317; EnergyFuels, 2004,18,116; CatalToday, 2007,123,276; CN103834432A).Heteropllyacids compound containing high-valence state transition metal is used as oxide catalyst, and arouse widespread concern, it is for catalytic oxidation desulfurization, shows good catalytic effect (GreenChem., 2010,12,1954; Chem.Commun., 2012,48,11647; Chem.Commun.2007,2,150; Catalysis journal, 2014,35,1433).But current Problems existing: one is that the catalytic activity of catalyzer need further raising, to realize the oxidizable object removed completely of thiophene-type sulfide in fuel oil; Two be catalyzer recycle weak effect.The reason that catalyst activity is low: one is because the catalyzed oxidation ability of catalyzer itself is low; Two is because current oxidation sweetening system still belongs to solid-liquid or liquid-liquid two-phase system, catalyzer with reaction substrate contact area is little, mass transfer diffusional resistance greatly, cause speed of reaction slow.
Ionic liquid has that structure can design, character controllable, advantages of environment protection, utilizes its structure designability, catalytic active center can be assembled in ionic liquid structure, make it while having catalytic activity, guarantee reusing of ionic liquid.But constructed reaction system majority is biphasic catalysis, speed of response is obviously not as homogeneous catalysis.Therefore, the ideal response system that ionic liquid participates in should be, during pyroreaction, ionic liquid and reactant coexist a phase, reaction terminates rear ionic liquid and product office two-phase again, reach the object of " high temperature homogeneous reaction; low temperature two-phase laminated flow ", the recovery of realization response-isolation integral and ionic liquid and reusing.
Summary of the invention
In order to solve, the catalyst activity existed in existing desulfurization technology is low, the dysoxidizable problem of thiophene-type sulfide, the present invention proposes a kind of method that polyether-type vanadium oxa-polyacid ionic liquid is catalyst fuel oil oxidation sweetening.The method technique is simple, and catalyst activity is high, it is effective to recycle, for deep desulfurization of fuel oil provides an eco-friendly operational path.
The present invention utilizes the designability of ionic liquid structure, structure of controlling temperature unit (polyether chain) is incorporated in the cationic structural of ionic liquid, in the positively charged ion that high-valence state vanadium atom is incorporated into ionic liquid or anion structure, and the heteropolyacid root be made up of high-valence state tungsten is designed to the negatively charged ion of ionic liquid, formulate out new class and there is catalyzed oxidation and the bifunctional ionic-liquid catalyst of temperature control, for the O of catalysis fuel oil 2oxidation sweetening.The feature of this catalyzer is: (1) has vanadium and tungsten two kinds of catalytic oxidation activity centers simultaneously, gives the catalytic activity that catalyzer is higher; (2) there is unique temperature-control performance, give the feature that catalytic desulfurization system has " high temperature homogeneous reaction; low temperature two-phase laminated flow ", during high temperature, catalyzer can carry out with the oxidation desulfur reaction of sulphur-containing burning oil in a phase, and reaction terminates automatically to be separated into two-phase again to catalyzer during room temperature and fuel oil.Therefore, new desulfurization system can solve low, the dysoxidizable problem of thiophene-type sulfide of catalytic activity that current oxidation sweetening catalyst system exists effectively, reaches the object of deep desulfurization of fuel oil.
Technical scheme of the present invention is:
In autoclave, add a certain amount of catalyzer, sulphur-containing burning oil and temperature control solvent toluene, with the air several in replacement of oxygen still, be then filled with the oxygen of certain pressure, heat and open magnetic agitation, reacting certain hour at a certain temperature.After reaction terminates, be cooled to room temperature, release, drive still.Catalyzer phase and the layering of oil product phase, the oil product on upper strata, with after isopyknic DMF (DMF) extraction, measures desulfurization degree; The catalyzer of lower floor without the need to process, direct reuse.
Described catalyzer is the stearylamine base vanadyl heteropolyacid ionic liquid containing polyether chain, is [AC 18] 4(VO) (PW 12o 40) 2, [AC 18] 4(VO 3) (PW 12o 40), [AC 18] 6(VO 3) 3(PW 12o 40) one wherein, wherein AC 18structural formula as follows:
The mol ratio of catalyzer of the present invention and oil product sulphur content is generally 1:1.6 ~ 4.8, the volume ratio of toluene and oil product is generally 1:1.5 ~ 2.0, oxygen pressure is generally 0.6 ~ 1.2MPa, and temperature of reaction is generally 80 ~ 120 DEG C, and the reaction times is generally 0.5 ~ 2.5h.
The present invention compares existing fuel catalytic oxidative desulfurization techniques, and tool has the following advantages:
1, catalyzer has vanadium and tungsten two kinds of high-valence state metals simultaneously, and catalyzed oxidation ability is strong.
2, catalyzer has temperature control chain, gives catalyst system and has the feature of " high temperature homogeneous reaction, low temperature two-phase laminated flow ", maintains that homogeneous reaction catalytic activity is high, heterogeneous reaction catalyzer and the segregative advantage of product simultaneously.
3, catalyst performance stabilised, recycles efficiency high.After recycling 22 times, desulfurization degree is still more than 90%.
4, take ionic liquid as catalyzer, O 2for oxygenant, belong to environmentally friendly technology route.
Specific implementation method
Below in conjunction with embodiment, method of the present invention is described further, but is not limitation of the invention.
In following examples, fuel oil used is the analog gasoline a certain amount of thionaphthene being dissolved in octane and being made into, and recording its sulphur content with WK-2D type Microcoulomb instrument is 667.972mgL -1.
Embodiment 1: with [AC 18] 4(VO 3) PW 12o 40for catalyzer, the ratio of n (catalyzer): n (sulfide)=1:1.6, volume ratio V (toluene): V (fuel oil)=1:2.0 in molar ratio, take catalyzer, fuel oil and toluene, add in reactor simultaneously.With the air several in replacement of oxygen still, be then filled with the oxygen of 1.0MPa, heat and open magnetic agitation, at temperature 100 DEG C, react 1.5 hours.After reaction terminates, be cooled to room temperature, catalyzer phase and the layering of fuel oil phase.Reclaim upper strata fuel oil phase, after isopyknic DMF extraction, measuring desulfurization degree is 96.0%.
Embodiment 2: with [AC 18] 6(VO 3) 3pW 12o 40for catalyzer, the ratio of n (catalyzer): n (sulfide)=1:1.6, volume ratio V (toluene): V (fuel oil)=1:2.0 in molar ratio, take catalyzer, fuel oil and toluene, add in reactor simultaneously.With the air several in replacement of oxygen still, be then filled with the oxygen of 1.0MPa, heat and open magnetic agitation, at temperature 100 DEG C, react 1.5 hours.After reaction terminates, be cooled to room temperature, catalyzer phase and the layering of fuel oil phase.Reclaim upper strata fuel oil phase, after isopyknic DMF extraction, measuring desulfurization degree is 96.2%.
Embodiment 3: with [AC 18] 4(VO) (PW 12o 40) 2for catalyzer, the ratio of n (catalyzer): n (sulfide)=1:3.2, volume ratio V (toluene): V (fuel oil)=1:2.0 in molar ratio, take catalyzer, fuel oil and toluene, add in reactor simultaneously.With the air several in replacement of oxygen still, be then filled with the oxygen of 0.6MPa, heat and open magnetic agitation, at temperature 80 DEG C, react 1 hour.After reaction terminates, be cooled to room temperature, catalyzer phase and the layering of fuel oil phase.Reclaim upper strata fuel oil phase, after isopyknic DMF extraction, measuring desulfurization degree is 94.0%.
Embodiment 4: with [AC 18] 4(VO) (PW 12o 40) 2for catalyzer, the ratio of n (catalyzer): n (sulfide)=1:4.8, volume ratio V (toluene): V (fuel oil)=1:2.0 in molar ratio, take catalyzer, fuel oil and toluene, add in reactor simultaneously.With the air several in replacement of oxygen still, be then filled with the oxygen of 1.0MPa, heat and open magnetic agitation, at temperature 80 DEG C, react 2 hours.After reaction terminates, be cooled to room temperature, catalyzer phase and the layering of fuel oil phase.Reclaim upper strata fuel oil phase, after isopyknic DMF extraction, measuring desulfurization degree is 95.0%.
Embodiment 5: with [AC 18] 4(VO) (PW 12o 40) 2for catalyzer, the ratio of n (catalyzer): n (sulfide)=1:4.8, volume ratio V (toluene): V (fuel oil)=1:2.0 in molar ratio, take catalyzer, fuel oil and toluene, add in reactor simultaneously.With the air several in replacement of oxygen still, be then filled with the oxygen of 0.6MPa, heat and open magnetic agitation, at temperature 100 DEG C, react 1.5 hours.After reaction terminates, be cooled to room temperature, catalyzer phase and the layering of fuel oil phase.Reclaim upper strata fuel oil phase, after isopyknic DMF extraction, measuring desulfurization degree is 97.2%.
Embodiment 6: with [AC 18] 4(VO) (PW 12o 40) 2for catalyzer, the ratio of n (catalyzer): n (sulfide)=1:2.4, volume ratio V (toluene): V (fuel oil)=1:2.0 in molar ratio, take catalyzer, fuel oil and toluene, add in reactor simultaneously.With the air several in replacement of oxygen still, be then filled with the oxygen of 1.0MPa, heat and open magnetic agitation, at temperature 100 DEG C, react 2.5 hours.After reaction terminates, be cooled to room temperature, catalyzer phase and the layering of fuel oil phase.Reclaim upper strata fuel oil phase, after isopyknic DMF extraction, measuring desulfurization degree is 98.8%.
Embodiment 7: with [AC 18] 4(VO) (PW 12o 40) 2for catalyzer, the ratio of n (catalyzer): n (sulfide)=1:3.2, volume ratio V (toluene): V (fuel oil)=1:2.0 in molar ratio, take catalyzer, fuel oil and toluene, add in reactor simultaneously.With the air several in replacement of oxygen still, be then filled with the oxygen of 1.2MPa, heat and open magnetic agitation, at temperature 100 DEG C, react 0.5 hour.After reaction terminates, be cooled to room temperature, catalyzer phase and the layering of fuel oil phase.Reclaim upper strata fuel oil phase, after isopyknic DMF extraction, measuring desulfurization degree is 97.0%.
Embodiment 8: with [AC 18] 4(VO) (PW 12o 40) 2for catalyzer, the ratio of n (catalyzer): n (sulfide)=1:2.4, volume ratio V (toluene): V (fuel oil)=1:2.0 in molar ratio, take catalyzer, fuel oil and toluene, add in reactor simultaneously.With the air several in replacement of oxygen still, be then filled with the oxygen of 0.6MPa, heat and open magnetic agitation, at temperature 120 DEG C, react 2 hours.After reaction terminates, be cooled to room temperature, catalyzer phase and the layering of fuel oil phase.Reclaim upper strata fuel oil phase, after isopyknic DMF extraction, measuring desulfurization degree is 96.1%.
Embodiment 9: with [AC 18] 4(VO) (PW 12o 40) 2for catalyzer, the ratio of n (catalyzer): n (sulfide)=1:3.2, volume ratio V (toluene): V (fuel oil)=1:2.0 in molar ratio, take catalyzer, fuel oil and toluene, add in reactor simultaneously.With the air several in replacement of oxygen still, be then filled with the oxygen of 0.8MPa, heat and open magnetic agitation, at temperature 120 DEG C, react 2.5 hours.After reaction terminates, be cooled to room temperature, catalyzer phase and the layering of fuel oil phase.Reclaim upper strata fuel oil phase, after isopyknic DMF extraction, measuring desulfurization degree is 97.9%.
Embodiment 10: with [AC 18] 4(VO) (PW 12o 40) 2for catalyzer, the ratio of n (catalyzer): n (sulfide)=1:4.8, volume ratio V (toluene): V (fuel oil)=1:2.0 in molar ratio, take catalyzer, fuel oil and toluene, add in reactor simultaneously.With the air several in replacement of oxygen still, be then filled with the oxygen of 1.2MPa, heat and open magnetic agitation, at temperature 120 DEG C, react 1 hour.After reaction terminates, be cooled to room temperature, catalyzer phase and the layering of fuel oil phase.Reclaim upper strata fuel oil phase, after isopyknic DMF extraction, measuring desulfurization degree is 96.6%.
Embodiment 11: with [AC 18] 4(VO) (PW 12o 40) 2for catalyzer, the ratio of n (catalyzer): n (sulfide)=1:1.6, volume ratio V (toluene): V (fuel oil)=1:1.5 in molar ratio, take catalyzer, fuel oil and toluene, add in reactor simultaneously.With the air several in replacement of oxygen still, be then filled with the oxygen of 1.0MPa, heat and open magnetic agitation, at temperature 100 DEG C, react 1.5 hours.After reaction terminates, be cooled to room temperature, catalyzer phase and the layering of fuel oil phase.Reclaim upper strata fuel oil phase, after isopyknic DMF extraction, measuring desulfurization degree is 95.1%.
Embodiment 12-33:
Catalyzer, with embodiment 6, is just changed into the catalyzer reclaimed in embodiment 6 by experiment condition and step, carries out repeating reuse experiment for 22 times, and finally measuring desulfurization degree is 90.3%.

Claims (2)

1. a catalysis fuel oil O 2the method of oxidation sweetening, it is characterized in that with polyether-type vanadyl heteropolyacid ionic liquid for catalyzer, n (catalyzer): n (sulfide)=1:1.6 ~ 4.8 in molar ratio, the ratio of volume ratio V (toluene): V (fuel oil)=1:1.5 ~ 2.0, catalyzer is added in autoclave, sulphur-containing burning oil and toluene, then the oxygen of 0.6 ~ 1.2MPa is filled with, at temperature 80 ~ 120 DEG C, react 0.5 ~ 2.5 hour, after reaction terminates, be cooled to room temperature, catalyzer phase and fuel oil phase AUTOMATIC ZONING, the fuel oil on upper strata is with after isopyknic DMF extraction, measure desulfurization degree, the catalyzer of lower floor is without the need to process, direct reuse.
2. in accordance with the method for claim 1, catalyzer is [AC 18] 4(VO) (PW 12o 40) 2, [AC 18] 4(VO 3) (PW 12o 40), [AC 18] 6(VO 3) 3(PW 12o 40) one wherein, wherein AC 18structural formula as follows:
m=a+b(125~158)
R=n-C 4H 9,n-C 8H 15,n-C 16H 31
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107866281A (en) * 2016-09-28 2018-04-03 中国科学院宁波材料技术与工程研究所 Hydroxy functionalized heteropolyacid catalyst, its preparation method and application
CN110354908A (en) * 2019-07-16 2019-10-22 闽江学院 Polyether-based is functionalized vanadium doping heteropoly acid poly ion liquid, synthetic method and its is preparing the application on hexamethylene lactone
CN113754875A (en) * 2021-10-08 2021-12-07 山东科技大学 Polyether type heteropoly acid temperature control ionic liquid for removing basic nitrides of gasoline and diesel oil and preparation method thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107866281A (en) * 2016-09-28 2018-04-03 中国科学院宁波材料技术与工程研究所 Hydroxy functionalized heteropolyacid catalyst, its preparation method and application
CN110354908A (en) * 2019-07-16 2019-10-22 闽江学院 Polyether-based is functionalized vanadium doping heteropoly acid poly ion liquid, synthetic method and its is preparing the application on hexamethylene lactone
CN110354908B (en) * 2019-07-16 2022-06-07 闽江学院 Polyether-based functionalized vanadium-doped heteropoly acid polyion liquid, synthesis method and application thereof in preparation of cyclohexadene
CN113754875A (en) * 2021-10-08 2021-12-07 山东科技大学 Polyether type heteropoly acid temperature control ionic liquid for removing basic nitrides of gasoline and diesel oil and preparation method thereof

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