CN114763338A - Crude oil desulfurizing agent and preparation method thereof - Google Patents
Crude oil desulfurizing agent and preparation method thereof Download PDFInfo
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- CN114763338A CN114763338A CN202110053792.9A CN202110053792A CN114763338A CN 114763338 A CN114763338 A CN 114763338A CN 202110053792 A CN202110053792 A CN 202110053792A CN 114763338 A CN114763338 A CN 114763338A
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- formaldehyde
- crude oil
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- aminodiglycol
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- 239000010779 crude oil Substances 0.000 title claims abstract description 32
- 239000003795 chemical substances by application Substances 0.000 title claims description 12
- 230000003009 desulfurizing effect Effects 0.000 title claims description 11
- 238000002360 preparation method Methods 0.000 title abstract description 13
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims abstract description 144
- 238000006243 chemical reaction Methods 0.000 claims abstract description 39
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 21
- 230000023556 desulfurization Effects 0.000 claims abstract description 21
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 claims abstract description 14
- 239000008098 formaldehyde solution Substances 0.000 claims abstract description 12
- 150000001875 compounds Chemical class 0.000 claims abstract description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 27
- 238000000034 method Methods 0.000 claims description 22
- 238000006116 polymerization reaction Methods 0.000 claims description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical group CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 7
- 239000003112 inhibitor Substances 0.000 claims description 7
- -1 aminodiethylene glycol monomethyl ether Chemical group 0.000 claims description 6
- 238000004821 distillation Methods 0.000 claims description 5
- YKXYFUCKWRACDY-UHFFFAOYSA-N 1-amino-2-(2-hydroxyethoxy)ethanol Chemical compound NC(O)COCCO YKXYFUCKWRACDY-UHFFFAOYSA-N 0.000 claims description 4
- 230000035484 reaction time Effects 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 6
- 239000000243 solution Substances 0.000 description 25
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 18
- 239000008367 deionised water Substances 0.000 description 16
- 229910021641 deionized water Inorganic materials 0.000 description 16
- 239000007864 aqueous solution Substances 0.000 description 15
- 239000000047 product Substances 0.000 description 14
- LCGLNKUTAGEVQW-UHFFFAOYSA-N Dimethyl ether Chemical compound COC LCGLNKUTAGEVQW-UHFFFAOYSA-N 0.000 description 12
- 239000002270 dispersing agent Substances 0.000 description 10
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 9
- 239000007789 gas Substances 0.000 description 9
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 9
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 7
- 239000002994 raw material Substances 0.000 description 7
- 238000003756 stirring Methods 0.000 description 7
- 238000005303 weighing Methods 0.000 description 7
- 238000010276 construction Methods 0.000 description 5
- 230000018109 developmental process Effects 0.000 description 4
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 3
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- JYEUMXHLPRZUAT-UHFFFAOYSA-N 1,2,3-triazine Chemical compound C1=CN=NN=C1 JYEUMXHLPRZUAT-UHFFFAOYSA-N 0.000 description 2
- VBICKXHEKHSIBG-UHFFFAOYSA-N 1-monostearoylglycerol Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCC(O)CO VBICKXHEKHSIBG-UHFFFAOYSA-N 0.000 description 2
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- YPFDHNVEDLHUCE-UHFFFAOYSA-N propane-1,3-diol Chemical compound OCCCO YPFDHNVEDLHUCE-UHFFFAOYSA-N 0.000 description 2
- DCXXMTOCNZCJGO-UHFFFAOYSA-N tristearoylglycerol Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCC(OC(=O)CCCCCCCCCCCCCCCCC)COC(=O)CCCCCCCCCCCCCCCCC DCXXMTOCNZCJGO-UHFFFAOYSA-N 0.000 description 2
- DPMZXMBOYHBELT-UHFFFAOYSA-N 1,3,5-trimethyl-1,3,5-triazinane Chemical group CN1CN(C)CN(C)C1 DPMZXMBOYHBELT-UHFFFAOYSA-N 0.000 description 1
- HUHGPYXAVBJSJV-UHFFFAOYSA-N 2-[3,5-bis(2-hydroxyethyl)-1,3,5-triazinan-1-yl]ethanol Chemical compound OCCN1CN(CCO)CN(CCO)C1 HUHGPYXAVBJSJV-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 150000001299 aldehydes Chemical class 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 150000007942 carboxylates Chemical class 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 235000003891 ferrous sulphate Nutrition 0.000 description 1
- 239000011790 ferrous sulphate Substances 0.000 description 1
- 229940075507 glyceryl monostearate Drugs 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 1
- 229910000359 iron(II) sulfate Inorganic materials 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000001788 mono and diglycerides of fatty acids Substances 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 229960004063 propylene glycol Drugs 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 231100000167 toxic agent Toxicity 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D251/00—Heterocyclic compounds containing 1,3,5-triazine rings
- C07D251/02—Heterocyclic compounds containing 1,3,5-triazine rings not condensed with other rings
- C07D251/04—Heterocyclic compounds containing 1,3,5-triazine rings not condensed with other rings having no double bonds between ring members or between ring members and non-ring members
-
- 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
- C10G29/00—Refining of hydrocarbon oils, in the absence of hydrogen, with other chemicals
- C10G29/20—Organic compounds not containing metal atoms
-
- 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
- C10G2300/00—Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
- C10G2300/20—Characteristics of the feedstock or the products
- C10G2300/201—Impurities
- C10G2300/207—Acid gases, e.g. H2S, COS, SO2, HCN
Abstract
A crude oil desulfurizer and a preparation method thereof, wherein the crude oil desulfurizer has the following structural formula:
wherein R1 is CH3Or CH2CH3(ii) a R2 is CH3Or CH2CH3(ii) a The R3 is CH3Or CH2CH3. The specific preparation method comprises the following steps: s1) adding the formaldehyde solution into aminodiglycol monoether dropwise, and reacting to obtain a reaction solution; s2) standing the reaction solution, and then distilling the reaction solution under reduced pressure to obtain the compound. The crude oil desulfurizer and the preparation method thereof have the advantages of good desulfurization effect, simple preparation and easy popularization and application.
Description
Technical Field
The invention relates to the technical field of oil and gas field development, in particular to a crude oil desulfurizing agent and a preparation method thereof.
Background
During the development of oil and gas fields, the hydrogen sulfide in associated gas can increase the cost and difficulty of crude oil exploitation. Hydrogen sulfide belongs to acid gas, and can cause corrosion of metal equipment and pipelines and aging of non-metal materials through a series of chemical reactions; the generated ferrous sulfate is deposited in pipelines and equipment, so that the mining difficulty and potential safety hazards are increased. Meanwhile, hydrogen sulfide is a toxic substance, and associated gas and secondary hydrogen sulfide can form potential safety hazards to oil well workers and surrounding residents. In addition, hydrogen sulfide gas spilled in the oil well can have environmental effects. Therefore, during oil and gas development, it is necessary to extract the hydrogen sulfide present in the oil field.
Existing crude oil desulfurization technologies can be broadly classified into three categories: physical desulfurization, chemical desulfurization and biological desulfurization.
Wherein, chemical desulfurization means that chemical agents are added at proper positions in a crude oil production system to remove hydrogen sulfide in crude oil, the key point of the chemical desulfurization technology lies in the selection and development of a desulfurizing agent, and a common crude oil desulfurizing agent mainly comprises: metal carboxylate desulfurizer, hydroxide desulfurizer, strong oxidant desulfurizer, amine desulfurizer, aldehydes, and the like. Among the amino desulfurizer, triazine desulfurizer has the advantages of low price, easy preparation, dissolution of byproducts in water, high desulfurization effect, sterilization, irreversible absorption process, pipeline corrosion reduction, and the like, and is the most common and hottest desulfurizer at present. At present, common triazine desulfurizer is 1,3, 5-trimethyl-hexahydro-s-triazine and 1,3, 5-tris (2-hydroxyethyl) -hexahydro-s-triazine.
At present, hydrogen sulfide gas existing in the crude oil exploitation process still seriously affects the construction process, construction equipment and construction safety, and although the existing desulfurizer has a certain desulfurization effect, the requirement on physical desulfurization equipment is high, and the cost is high; biological desulfurization has poor stability. With the increasing requirements on sulfur content in the use process of crude oil and the increasing emphasis on construction equipment and construction safety, the existing desulfurizing agent is increasingly difficult to meet the increasing desulfurization requirements, so that a new desulfurizing agent needs to be developed to meet the increasing desulfurization requirements.
Disclosure of Invention
In order to solve the problems of the prior art, the invention provides a crude oil desulfurizing agent and a preparation method thereof.
The technical scheme of the invention is as follows:
a crude oil desulfurizer is characterized by having the following structural formula:
wherein R1 is CH3Or CH2CH3(ii) a R2 is CH3Or CH2CH3(ii) a The R3 is CH3Or CH2CH3。
Preferably, R1, R2 and R3 are CH2CH3
The preparation method of the crude oil desulfurizing agent is characterized by comprising the following steps;
s1) adding the formaldehyde solution into aminodiglycol monoether dropwise, and reacting to obtain a reaction solution;
s2) standing the reaction solution, and then distilling the reaction solution under reduced pressure to obtain the compound.
Further, the aminodiethylene glycol monoether is aminodiethylene glycol monomethyl ether or aminodiethylene glycol monoethyl ether.
Further, the molar ratio of the formaldehyde to the aminodiglycol monoether is 1: 0.5-2.
Further, the molar ratio of the formaldehyde to the aminodiglycol monoether is 1-1.5: 1.
Further, the formaldehyde solution is a formaldehyde aqueous solution, wherein the concentration of formaldehyde is 40 wt% to 55 wt%.
Further, in the step S1), the reaction temperature is 60-120 ℃; the reaction time is 20-60 min.
Further, in the step S2), the reaction solution is allowed to stand at 20-30 ℃ for 45-80 min, and then is subjected to reduced pressure distillation after standing.
Further, a polymerization inhibitor is added into the formaldehyde solution, and the concentration of the polymerization inhibitor in the formaldehyde solution is 0.05-0.5 wt%.
Further, the polymerization inhibitor is ethanol or methanol, preferably methanol, because methanol not only can prevent formaldehyde from polymerizing, but also has weak acidity, can ionize a small amount of hydrogen ions in the reaction process, has a catalytic effect on the reaction, shortens the reaction time and improves the reaction rate.
The invention has the following technical effects:
the invention provides a novel crude oil desulfurizer and a preparation method thereof, aiming at the problems that equipment of hydrogen sulfide in associated gas is seriously corroded, the environment is greatly polluted and desulfurization is needed in the existing crude oil exploitation process, and the existing desulfurizer has high equipment requirement, high cost or poor stability. Meanwhile, methanol is added in the preparation process of the crude oil desulfurizer for preventing formaldehyde polymerization, and the catalytic reaction is carried out, so that formaldehyde and aminodiglycol monoether react more quickly, the reaction time is shortened, the reaction temperature is reduced, the preparation cost is reduced, the stability is high, and the application and popularization of the desulfurizer are facilitated.
Detailed Description
The present invention will be further described with reference to the following examples.
Example 1
A crude oil desulfurizer adopts formaldehyde and aminodiglycol monomethyl ether as raw materials and is prepared by the following method:
s11) weighing formaldehyde and aminodiglycol monomethyl ether according to the molar ratio of 2:1, and preparing formaldehyde into a 40 wt% formaldehyde aqueous solution by using deionized water;
s12) heating the aminodiglycol monomethyl ether to 60 ℃, and dropwise adding the prepared formaldehyde aqueous solution under the stirring condition; reacting for 60min to obtain a reaction solution;
s2) standing the reaction solution at 20 ℃, standing for 45min, and distilling the reaction solution under reduced pressure to obtain a product A.
In this example, R1, R2 and R3 are each methyl.
Example 2
A crude oil desulfurizer adopts formaldehyde and aminodiglycol monomethyl ether as raw materials and is prepared by the following method:
s11) weighing formaldehyde and aminodiglycol monomethyl ether according to the molar ratio of 1:2, and preparing formaldehyde into a formaldehyde aqueous solution with the concentration of 55 wt% by adopting deionized water;
s12) heating the aminodiglycol monomethyl ether to 120 ℃, and dropwise adding the prepared formaldehyde aqueous solution under the stirring condition; reacting for 20min to obtain a reaction solution;
s2) standing the reaction solution at 30 ℃, standing for 80min, and distilling the reaction solution under reduced pressure to obtain a product B.
In this example, R1, R2 and R3 are each methyl.
Example 3
A crude oil desulfurizer adopts formaldehyde and aminodiglycol monomethyl ether as raw materials and is prepared by the following method:
s11) weighing formaldehyde and aminodiglycol monomethyl ether according to the molar ratio of 1:1, and preparing formaldehyde into a formaldehyde aqueous solution with the concentration of 50 wt% by adopting deionized water;
s12) heating the aminodiglycol monomethyl ether to 80 ℃, and dropwise adding the prepared formaldehyde aqueous solution under the stirring condition; reacting for 45min to obtain a reaction solution;
s2) standing the reaction solution at 25 ℃, standing for 60min, and then carrying out reduced pressure distillation on the reaction solution to obtain a product C.
In this example, R1, R2 and R3 are each methyl.
Example 4
A crude oil desulfurizer adopts formaldehyde and aminodiglycol monoethyl ether as raw materials and is prepared by the following method:
s11) weighing formaldehyde and aminodiglycol monoethyl ether according to the molar ratio of 2:1, and preparing formaldehyde into 40 wt% formaldehyde aqueous solution by using deionized water;
s12) heating the aminodiethylene glycol monoethyl ether to 60 ℃, and dropwise adding the prepared formaldehyde aqueous solution under the stirring condition; reacting for 60min to obtain a reaction solution;
s2) standing the reaction solution at 20 ℃, standing for 45min, and then carrying out reduced pressure distillation on the reaction solution to obtain a product D.
In this example, R1, R2 and R3 are each ethyl groups.
Example 5
A crude oil desulfurizer adopts formaldehyde and aminodiglycol monoethyl ether as raw materials and is prepared by the following method:
s11) weighing formaldehyde and aminodiglycol monoethyl ether according to the molar ratio of 1:2, and preparing formaldehyde into 55 wt% formaldehyde aqueous solution by using deionized water;
s12) heating the aminodiglycol monoethyl ether to 120 ℃, and dropwise adding the prepared formaldehyde aqueous solution under the stirring condition; reacting for 20min to obtain a reaction solution;
s2) standing the reaction solution at 30 ℃, standing for 80min, and then carrying out reduced pressure distillation on the reaction solution to obtain a product E.
In this example, R1, R2 and R3 are each ethyl groups.
Example 6
A crude oil desulfurizer adopts formaldehyde and aminodiglycol monoethyl ether as raw materials and is prepared by the following method:
s11) weighing formaldehyde and aminodiglycol monoethyl ether according to the molar ratio of 1:1, and preparing formaldehyde into a 50 wt% formaldehyde aqueous solution by using deionized water;
s12) heating the aminodiglycol monoethyl ether to 80 ℃, and dropwise adding the prepared formaldehyde aqueous solution under the stirring condition; reacting for 45min to obtain a reaction solution;
s2) standing the reaction solution at 25 ℃, standing for 60min, and distilling the reaction solution under reduced pressure to obtain a product F.
In this example, R1, R2 and R3 are each ethyl groups.
Example 7
A crude oil desulfurizer adopts formaldehyde, aminodiglycol monomethyl ether and methanol as raw materials and is prepared by the following method:
s11) weighing formaldehyde and aminodiglycol monomethyl ether according to the molar ratio of 1:1, preparing the formaldehyde into a formaldehyde solution with the concentration of 50 wt% by adopting deionized water, adding 0.1 wt% of methanol into the formaldehyde solution, and mixing to obtain a formaldehyde aqueous solution;
s12) heating the aminodiglycol monomethyl ether to 70 ℃, and dropwise adding the prepared formaldehyde aqueous solution under the stirring condition; reacting for 30min to obtain a reaction solution;
s2) standing the reaction solution at 25 ℃, standing for 60min, and distilling the reaction solution under reduced pressure to obtain a product G.
This example, R1, R2, and R3 are each methyl.
The crude oil desulfurizer prepared by the method is sequentially added with 5% of glycol, 5% of dispersant and 10% of deionized water to obtain a desulfurization system, and a desulfurization test is carried out on the crude oil, wherein the desulfurization effect is as follows:
| numbering | Proportioning | Water solubility | Desulfurization degree (%) |
| 1 | The product A, 5 percent of ethylene glycol, 5 percent of dispersant and 10 percent of deionized water | Is transparent | 93.5 |
| 2 | Product B, 5 percent of glycol, 5 percent of dispersant and 10 percent of deionized water | Is transparent | 94.2 |
| 3 | The product C + 5% of glycol + 5% of dispersant + 10% of deionized water | Is transparent | 93.8 |
| 4 | Product D + 5% ethylene glycol + 5% dispersant + 10% deionized water | Is transparent | 95.1 |
| 5 | Product E + 5% ethylene glycol + 5% dispersant + 10% deionized water | Is transparent | 92.3 |
| 6 | Product F + 5% ethylene glycol + 5% dispersant + 10% deionized water | Is transparent | 93.3 |
| 7 | Product G + 5% ethylene glycol + 5% dispersant + 10% deionized water | Is transparent | 96.8 |
The above desulfurization system is only an example, and the invention can be applied to the existing crude oil desulfurization system, for example, the system comprises 3 to 7 mass percent of ethylene glycol, 3 to 7 mass percent of dispersant and 8 to 12 mass percent of deionized water, wherein the dispersant can be any one or more of methanol, ethanol, glycerol, 1, 2-propylene glycol, 1, 3-propylene glycol, glyceryl tristearate, glyceryl monostearate and the like, and the above effects can be achieved.
Claims (12)
1. The crude oil desulfurizing agent is characterized by having a structural formula as follows:
wherein R1 is CH3Or CH2CH3(ii) a R2 is CH3Or CH2CH3(ii) a R3 is CH3Or CH2CH3。
2. The crude oil desulfurization agent according to claim 1, wherein R1, R2 and R3 are CH2CH3。
3. The method for producing a desulfurizing agent for crude oil according to any one of claims 1 to 2, comprising the steps of;
s1) adding the formaldehyde solution into aminodiglycol monoether dropwise, and reacting to obtain a reaction solution;
s2) standing the reaction solution, and then distilling the reaction solution under reduced pressure to obtain the compound.
4. A process according to claim 3, characterised in that the aminodiethylene glycol monoether is aminodiethylene glycol monomethyl ether or aminodiethylene glycol monoethyl ether.
5. The method according to claim 3, wherein the molar ratio of formaldehyde to aminodiethylene glycol monoether is 1: 0.5-2.
6. The method according to claim 5, wherein the molar ratio of formaldehyde to aminodiethylene glycol monoether is 1-1.5: 1.
7. The method according to claim 3, characterized in that the formaldehyde solution is an aqueous formaldehyde solution, wherein the concentration of formaldehyde is between 40% and 55% by weight.
8. The method according to claim 3, wherein in step S1), the reaction temperature is 60-120 ℃; the reaction time is 20-60 min.
9. The method according to claim 3, wherein in step S2), the reaction solution is allowed to stand at 20 to 30 ℃ for 45 to 80min, and then subjected to distillation under reduced pressure after standing.
10. The method according to claim 3, wherein a polymerization inhibitor is added to the formaldehyde solution, and the concentration of the polymerization inhibitor in the formaldehyde solution is 0.05 wt% to 0.5 wt%.
11. The method according to claim 10, characterized in that the polymerization inhibitor is ethanol or methanol.
12. The method according to claim 11, characterized in that the polymerization inhibitor is methanol.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116162068A (en) * | 2023-04-24 | 2023-05-26 | 山东海嘉石油化工有限公司 | Triazine desulfurizing agent and preparation method thereof |
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2021
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