CN106967453A - The method for removing oil product neutral and alkali and non basic nitrogen compound - Google Patents

The method for removing oil product neutral and alkali and non basic nitrogen compound Download PDF

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Publication number
CN106967453A
CN106967453A CN201710280765.9A CN201710280765A CN106967453A CN 106967453 A CN106967453 A CN 106967453A CN 201710280765 A CN201710280765 A CN 201710280765A CN 106967453 A CN106967453 A CN 106967453A
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oil product
basic nitrogen
alkali
simulation
simulation oil
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CN106967453B (en
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宋修艳
王辉
于世涛
刘福胜
刘仕伟
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Qingdao University of Science and Technology
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    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10GCRACKING 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
    • C10G17/00Refining of hydrocarbon oils in the absence of hydrogen, with acids, acid-forming compounds or acid-containing liquids, e.g. acid sludge
    • C10G17/02Refining of hydrocarbon oils in the absence of hydrogen, with acids, acid-forming compounds or acid-containing liquids, e.g. acid sludge with acids or acid-containing liquids, e.g. acid sludge
    • C10G17/04Liquid-liquid treatment forming two immiscible phases
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10GCRACKING 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
    • C10G2300/00Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
    • C10G2300/20Characteristics of the feedstock or the products
    • C10G2300/201Impurities
    • C10G2300/202Heteroatoms content, i.e. S, N, O, P

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  • 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 belongs to petrochemical industry, it is related to the method removed while the basic nitrogen compound in oil product and non basic nitrogen compound, this method uses the double-core ionic liquid of non-cationic acid functionalization for denitrifier, denitrifier is added in closed container with simulation oil product and carried out, it is sufficiently stirred at 0 40 DEG C, after static layering, separation upper strata oil product and lower floor's liquid;The simulation oil product is basic nitrogen simulation oil product, non basic nitrogen simulation oil product or mixing nitrogen simulation oil product.This method can be operated under normal pressure lower temperature, and the reaction time is short, and required equipment is simple, and reaction terminates, and through simple process, the ionic liquid of recovery is reusable.

Description

The method for removing oil product neutral and alkali and non basic nitrogen compound
Technical field
The invention belongs to petrochemical industry, removed while being related to the basic nitrogen compound in oil product and non basic nitrogen compound Method.
Background technology
The presence of nitride, can be with nitrogen oxides NO after burning except that can influence the color and stability of oil product in oil productX Form be discharged into air, cause outside serious air pollution, can also bring strong influence to the reduction of vapour, diesel oil sulfur content. In Oil Production, the basic nitrogen compound of denier can cause valuable catalysis in the technical process such as catalytic cracking, hydrofinishing Agent is poisoned, and shortens the service life of catalyst, so as to increase production cost, reduces yield.According to statistics, nitrogen content is reduced in crude oil 90%, the yield of gasoline can improve 20%.
Oil product nitride routine removal methods have hydrodenitrogeneration and Non-hydrogenation technology.Hydrodenitrogeneration is most widely used at present One of method, such a method technics comparing is ripe, and have the advantages that technique be simple and convenient to operate, oil product high income, but plus Equipment investment needed for hydrogen is than larger, and operating condition is harsh, and operating cost is higher.And deep hydrogenation can become oil quality Difference, stability declines, and either shallow hydrogenation can reduce denitrification percent again.At present, the focus of research is Non-hydrogenation technology method.Grind Study carefully and show, inorganic acid, heteropoly acid, ion exchange resin, acidic ion liquid etc. can effectively remove basic nitrogen compound (CN 101861374A).For the removing of non basic nitrogen, current research is relatively fewer, and for removing basic nitrogen and non-alkali simultaneously The method of property is then even more rare.
The Chinese patent of Application No. 201510635337.4 discloses a kind of using double imidazoles SO3H functionalization it is acid from Basic nitrogen and non basic nitrogen in sub- liquid selective removing oil product, the ionic liquid used is SO3H functionalization, it synthesizes road Line is more complicated, and acid stronger, and heavier corrosivity is produced to equipment.
The content of the invention
It is an object of the invention to propose a kind of use double-core acidic ion liquid to the alkalescence and non basic nitrogen in oil product Compound carries out the new method of selectively removing, and this method can remove quinoline and indoles in oil product simultaneously, is taken off with higher Nitrogen rate, ionic liquid consumption is smaller;The synthetic route of the ionic liquid of use is simpler, and cost is lower;Property milder one A bit, the corrosivity to equipment is smaller.
The present invention is realized using following technical scheme:
A kind of to remove oil product neutral and alkali and the method for non basic nitrogen compound, this method uses the double-core acid with following structure Property ionic liquid is used as denitrifier:
N=2 or 3 or 4
Y=HSO4Or H2PO4Or BF4Or CH3SO3Or CF3SO3Or p-CH3C6H5SO3Or CF3COO
Denitrification process:Denitrifier is added in closed container and extracted with simulation oil product, extraction is concretely comprised the following steps It is sufficiently stirred at 0-40 DEG C, after static layering, separation upper strata oil product and lower floor's liquid;The simulation oil product is basic nitrogen simulation oil Product, non basic nitrogen simulation oil product or mixing nitrogen simulation oil product.
Above-mentioned technical proposal, is 1 according to the mass ratio of denitrifier and simulation oil product further:(5-50), temperature 20- 40 DEG C, 10-40min is stirred, stands and a point liquid is carried out after 30min;The nitrogen content of the simulation oil product is 175mgL-1
Above-mentioned technical proposal, further, the mass ratio that the denitrifier simulates oil product with non-alkaline are 1:(5-10).
Above-mentioned technical proposal, further, the nitrogen removal step are carried out at ambient pressure.
Above-mentioned technical proposal, further, the basic nitrogen simulation oil product contain at least one in quinoline, pyridine and aniline Kind.
Above-mentioned technical proposal, further, the non basic nitrogen simulation oil product are that indoles simulates oil product or carbazole simulation Oil product.
Above-mentioned technical proposal, further, the mixing nitrogen simulation oil product contain quinoline and indoles, or pyridine and click Azoles.
Above-mentioned technical proposal, further, the lower floor's liquid isolated are straight without back extraction processing as denitrifier Connect and use, can be 6 times with Reusability, denitrification percent at least 95%;Through absolute ether back extraction handle after, denitrification activity can recover to More than 99%.
Compared with prior art, the method for removing oil product neutral and alkali of the invention and non basic nitrogen compound has following beneficial Effect:
(1) denitrifier is non-cationic acid functionalization double-core ionic liquid, and synthetic route is simple, and cost is low, it is easier to right The acidity of ionic liquid is regulated and controled, and compared with the ionic liquid of sulfonic group or carboxyl-functional, its acidity is weaker, and property is more Heat and significantly improve equipment corrosion and discharge of wastewater problem;
(2) anion of ionic liquid is acid, overall in acidity, there is higher removal efficiency to basic nitrogen, and cation is double The design of core, makes its structure more symmetrical again, equally has excellent effect to the removing of non basic nitrogen;
(3) reaction condition is gentle, and denitrogenation program is simple, high to the disposable removal efficiency of alkalescence and non basic nitrogen compound, 1g Ionic liquid can once remove 50g nitrogen contents 175mgL-1Simulation oil product in more than 99% alkalescence and non-alkaline nitridation Thing;
(4) oil product is carried out after denitrogenation, separated oil product with ionic liquid by point liquid, ionic liquid is without processing It may continue as denitrifier to reuse 6 times, denitrification percent is still up to 95.52%.
Embodiment
In order to be more clearly understood from the above objects, features and advantages of the present invention, with reference to embodiment to this Invention is described further.
Many details are elaborated in the following description to facilitate a thorough understanding of the present invention, still, the present invention may be used also To be implemented using other modes described here are different from, therefore, the present invention is not limited to following public specific embodiment.
Used in following examples simulation oil product compound method for:
Basic nitrogen simulates oil product:The analytically pure quinoline of 161.43mg is dissolved in 100mL normal heptane solution is made, it is molten The concentration of nitrogen in liquid is 175mgL-1
Non basic nitrogen simulates oil product:The analytically pure indoles of 146.32mg is dissolved in 100mL normal heptane solution is made, The concentration of nitrogen in solution is 175mgL-1
Mix nitrogen simulation oil product:The analytically pure quinoline of 161.43mg and the analytically pure indoles of 146.32mg are dissolved in The concentration that the nitrogen in solution, solution is made in 200mL normal heptane is 175mgL-1
Ionic liquid denitrogenation is tested:In the reaction bulb with plug and magneton, 1g ionic liquids are added, 5-50g is added Oil product is simulated, 10-40min is stirred at room temperature, 30min is stood, suction pipe draws upper strata oil product, is determined with TN-3000 apparatuss for nitrogen examination The nitrogen content of oil product before and after denitrogenation, calculates denitrification percent of the ionic liquid to oil product accordingly.
Embodiment 1
Take 50g quinoline to simulate oil product in reaction bulb, add 1g double-core ionic liquids After the stirring reaction 0.5h at 20 DEG C, sedimentation 0.5h, upper strata oil product TN-3000 apparatuss for nitrogen examination are taken to survey nitrogen content, denitrification percent is 99.86%.
Embodiment 2
Ionic liquid, is simply changed to by experiment condition and step be the same as Example 1 Denitrification percent is 99.88%.
Embodiment 3
Ionic liquid, is simply changed to by experiment condition and step be the same as Example 1 Denitrification percent is 99.28%.
Embodiment 4
Take 10g indoles to simulate oil product in reaction bulb, add 1g double-core acidic ion liquids Magnetic agitation 1h at 20 DEG C, stands and takes upper strata oil product to survey nitrogen content after 0.5h, denitrification percent is 99.20%.
Embodiment 5
30g hybrid analog-digital simulation oil products are taken in reaction bulb, 1g double-core acidic ion liquids are added Magnetic agitation 1h at 20 DEG C, stands and takes upper strata oil product to survey nitrogen content after 0.5h, denitrification percent is 99.60%.
Embodiment 6
30g hybrid analog-digital simulation oil products are taken in reaction bulb, 1g double-core acidic ion liquids are addedMagnetic agitation 1h at 20 DEG C, stands and upper strata oil is taken after 0.5h Product survey nitrogen content, and denitrification percent is 99.66%.
Embodiment 7-13
Take 50g quinoline to simulate oil product, add magnetic agitation reaction 20min at 1g triethylamine class double-core ionic liquids, 40 DEG C, Upper strata oil product is taken after sedimentation 30min.Nitrogen content is surveyed with TN-3000 apparatuss for nitrogen examination, denitrogenation the results are shown in Table 1.
The embodiment 7-13 of table 1 denitrogenation result
Embodiment 14-19
Experiment condition and step be the same as Example 7-13, are simply changed to indoles simulation oil product by oil product, indoles simulation oil product Quality is 10g, and the quality of denitrifier is 1g, and denitrogenation the results are shown in Table 2.
The embodiment 14-19 of table 2 denitrogenation result
Embodiment 20
Select ionic liquid BF4[(C2H5)3N(CH2)3N(C2H5)3]BF4, experiment condition and step be the same as Example 14-19, Experiment finishes separating oil and ionic liquid, and ionic liquid carries out the experiment of denitrogenation next time without processing, and denitrogenation the results are shown in Table 3, Ionic liquid is reused 6 times, and denitrification effect is still up to 95.52%, shows good repeat performance.
Table 3BF4[(C2H5)3N(CH2)3N(C2H5)3]BF4Repeat removing indoles simulation oil product
Comparative example 1:Experiment condition and step be the same as Example 1, are simply changed to monokaryon (C by ionic liquid2H5)3NHSO4, mould It is only 40.90% to intend oil denitrification rate.
Comparative example 2:Experiment condition and step be the same as Example 4, are simply changed to monokaryon (C by ionic liquid2H5)3NHSO4, mould It is only 21.33% to intend oil denitrification rate.
Comparative example 3:Experiment condition and step be the same as Example 5, are simply changed to monokaryon (C by ionic liquid2H5)3NHSO4, mould It is only 30.20% to intend oil denitrification rate.
The quinoline in above-described embodiment is substituted with analytically pure aniline or pyridine, the concentration for preparing nitrogen is 175mgL-1 Basic nitrogen simulation oil product, and carry out denitrogenation experiment, the ionic liquid and specific steps of use are with reference to above-described embodiment on alkali Property nitrogen simulate the nitrogen removal step of oil product, and denitrification percent is determined using identical method.As a result the ionic liquid energy of the present invention is shown Aniline, pyridine enough in removing oil product, and removal efficiency is above the removal efficiency for quinoline, shows the ionic liquid of the present invention To the removal effect of aniline in oil product and pyridine more preferably.
The imidazoles in above-described embodiment is substituted with analytically pure carbazole, the concentration for preparing nitrogen is 175mgL-1Non-alkaline Nitrogen simulates oil product, and carries out denitrogenation experiment, and ionic liquid and specific steps reference above-described embodiment of use are on non basic nitrogen The nitrogen removal step of oil product is simulated, and denitrification percent is determined using identical method.As a result showing the ionic liquid of the present invention can take off Except the carbazole in oil product, and removal efficiency is suitable with the removal efficiency of imidazoles, and nitrogen content can be down to 5mgL by a denitrogenation-1With Under, show the ionic liquid of the present invention also has good removal efficiency to the carbazole in oil product.
Above-described embodiment shows, when the mass ratio of denitrifier and simulation oil product is 1:There is extraordinary denitrogenation to imitate when 50 Really, the mass ratio that particularly denitrifier simulates oil product with non basic nitrogen is 1:When 10, the denitrogenation that oil product is simulated to non basic nitrogen is imitated Fruit is very good.In theory, denitrifier consumption is more, and the probability that nitride is contacted with denitrifier in oil product is bigger, and denitrification effect is got over It is good, it is contemplated that the bigger cost of denitrifier consumption is higher, when the quality of denitrifier and simulation oil product is more than 1:After 5, contact several The raising effect that rate is played to denitrification effect is less obvious, and denitrogenation cost straight line is improved, therefore, overall balance denitrogenation effect Fruit limits denitrifier with the mass ratio of simulation oil product as 1 with producing cost:(5-50).
Embodiment described above is only some preferred embodiments of the present invention, and not the scope of the present invention is limited Fixed, on the premise of design spirit of the present invention is not departed from, those of ordinary skill in the art make to technical scheme In various modifications and improvement, the protection domain that claims of the present invention determination all should be fallen into.

Claims (8)

1. a kind of remove oil product neutral and alkali and the method for non basic nitrogen compound, it is characterised in that this method, which is used, has following knot The double-core acidic ion liquid of structure is used as denitrifier:
Or (C2H5)3N-
N=2 or 3 or 4
Y=HSO4Or H2PO4Or BF4Or CH3SO3Or CF3SO3Or p-CH3C6H5SO3Or CF3COO
Denitrification process:Denitrifier is added in closed container with simulation oil product and carried out, is sufficiently stirred at 0-40 DEG C, static layering Afterwards, separation upper strata oil product and lower floor's liquid;The simulation oil product is basic nitrogen simulation oil product, non basic nitrogen simulation oil product or mixed Close nitrogen simulation oil product.
2. removing oil product neutral and alkali according to claim 1 and the method for non basic nitrogen compound, it is characterised in that according to de- The mass ratio of nitrogen agent and simulation oil product is 1:(5-50), 20-40 DEG C of temperature stirs 10-40min, is divided after standing 30min Liquid;The nitrogen content of the simulation oil product is 175mgL-1
3. removing oil product neutral and alkali according to claim 2 and the method for non basic nitrogen compound, it is characterised in that described de- The mass ratio that nitrogen agent simulates oil product with non-alkaline is 1:(5-10).
4. removing oil product neutral and alkali according to claim 3 and the method for non basic nitrogen compound, it is characterised in that described de- Nitrogen step is carried out at ambient pressure.
5. removing oil product neutral and alkali and the method for non basic nitrogen compound according to claim any one of 1-4, its feature exist In the basic nitrogen simulation oil product contains at least one of quinoline, pyridine and aniline.
6. removing oil product neutral and alkali and the method for non basic nitrogen compound according to claim any one of 1-4, its feature exist In the non basic nitrogen simulation oil product is that indoles simulates oil product or carbazole simulation oil product.
7. removing oil product neutral and alkali and the method for non basic nitrogen compound according to claim any one of 1-4, its feature exist In the mixing nitrogen simulation oil product contains quinoline and indoles, or pyridine and carbazole.
8. removing oil product neutral and alkali and the method for non basic nitrogen compound according to claim any one of 1-4, its feature exist In the lower floor's liquid isolated is handled without back extraction as denitrifier and directly used, can be 6 times with Reusability, denitrogenation Rate at least 95%;After being handled through absolute ether back extraction, denitrification activity can recover to more than 99%.
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