CN105712848A - Methyl tertiary butyl ether desulfurizing agent and application method thereof - Google Patents
Methyl tertiary butyl ether desulfurizing agent and application method thereof Download PDFInfo
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- CN105712848A CN105712848A CN201610169017.9A CN201610169017A CN105712848A CN 105712848 A CN105712848 A CN 105712848A CN 201610169017 A CN201610169017 A CN 201610169017A CN 105712848 A CN105712848 A CN 105712848A
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- tertiary butyl
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C41/00—Preparation of ethers; Preparation of compounds having groups, groups or groups
- C07C41/01—Preparation of ethers
- C07C41/34—Separation; Purification; Stabilisation; Use of additives
- C07C41/40—Separation; Purification; Stabilisation; Use of additives by change of physical state, e.g. by crystallisation
- C07C41/42—Separation; Purification; Stabilisation; Use of additives by change of physical state, e.g. by crystallisation by distillation
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C41/00—Preparation of ethers; Preparation of compounds having groups, groups or groups
- C07C41/01—Preparation of ethers
- C07C41/34—Separation; Purification; Stabilisation; Use of additives
- C07C41/46—Use of additives, e.g. for stabilisation
Abstract
The invention discloses a methyl tertiary butyl ether desulfurizing agent. The desulfurizing agent comprises the active component including a styrene compound. The additive amount of the methyl tertiary butyl ether desulfurizing agent accounts for 100 mg to 10,000 mg in the mass of every 1 kg of sulfur-containing methyl tertiary butyl ether raw materials. The additive amount of the methyl tertiary butyl ether desulfurizing agent is very small, sulfur in methyl tertiary butyl ether with the sulfur content of 120 mg/kg can be effectively reduced to 10 mg/kg or below and even 2 mg/kg simply by adding 100 mg/kg to 10,000 mg/kg of the methyl tertiary butyl ether desulfurizing agent through an existing catalyst distillation device, no metal element is included, heavy metal poisoning of subsequent hydrogenation or a catalytic cracking catalyst cannot be caused, and wide industrial application prospects are achieved.
Description
Technical field
The invention belongs to methyl tertiary butyl ether(MTBE) technical field of desulfurization, be specifically related to a kind of methyl tertiary butyl ether(MTBE) desulfurizing agent and using method thereof.
Background technology
Methyl tertiary butyl ether(MTBE) (methyltert-butylether, MTBE) it is produce desirable blend component unleaded, high-octane rating, oxygenated gasoline, itself and gasoline have good intermiscibility, not only can improve efficiency of combustion and the capability of antidetonance thereof of gasoline, it is also possible to reduce the discharge of CO and other harmful substances (such as ozone, benzene, butadiene etc.).MTBE can also as paraffin, oil product, spice, alkaloid, resin, the solvent of rubber, organic synthesis reactant, it is also possible to cracking is for high-purity isobutene..Current domestic gasoline generally adds methyl tertiary butyl ether(MTBE) to improve the octane number of gasoline.But environmental protection is newly advised and is required that gasoline need to reach state IV or state V standard, and namely its sulfur content need to less than 50mg/kg or 10mg/kg.The main production of current domestic methyl tertiary butyl ether(MTBE) is to utilize mixing C4 and methanol to carry out etherificate and separation in cation exchange resin is as the catalytic distillation tower of catalyst.Owing in mixing C4, sulfur content is higher, and sulfur is relatively soluble in methyl tertiary butyl ether(MTBE), cause the sulfide usually containing 50～200mg/kg in methyl tert-butyl ether product, the methyl tertiary butyl ether(MTBE) medium sulphide content content of part manufacturer production is sometime up to 2000mg/kg, and therefore the necessary desulfurization of methyl tertiary butyl ether(MTBE) can as desirable gasoline blend component.
Sulfide in methyl tertiary butyl ether(MTBE) is mainly disulphide and a small amount of mercaptan, thioether, thiophenic sulfur, in prior art, desulfurizing agent mainly has organic solvent extracting type, molecular sieve catalytic type and the enrichment dosage form of the sulfur containing metallic element, but organic solvent addition is big, cause that desulphurization cost is high, molecular sieve catalyst cost height and again generating apparatus and complicated operation, most sulfur pregnant solutions contain metallic element, and follow-up hydrogenation and catalytic cracking catalyst can be made poisoning, therefore use and are limited to.
Chinese patent CN102491882 provides the production method of a kind of low sulfur methyl tertiary butyl ether, add extraction during by sulfur methyl tertiary butyl ether rectification again and the heating before rectification being vaporized and take out sulfur solvent, it extracts takes out one or more in Reformed Gasoline, catalytic hydrogenation heavy petrol, solvent naphtha, kerosene, diesel oil, aromatic hydrocarbons, heavy aromatics, butanol, capryl alcohol, furfural or sulfolane of sulfur solvent, and dosage is 1～10% percent by volume of charging methyl tertiary butyl ether(MTBE).Description only provides furfural as the embodiment taking out sulfur solvent, and all the other embodiments all do not provide specifically takes out sulfur solvent and desulfurized effect.Although the sulfur content of methyl tertiary butyl ether(MTBE) can be reduced to below 10mg/kg by this invention, but the addition of its desulfurizing agent is big, account for 1～10% percent by volume of methyl tertiary butyl ether(MTBE) raw material, it is converted into mass ratio higher, more than 10000mg/kg～100000mg/kg, increase a rectifying column separating step simultaneously, add energy consumption and equipment, running cost.
Chinese patent CN104370707 discloses a kind of addition sulfur pregnant solution in the catalytic distillation producing methyl tertiary butyl ether(MTBE) separates and/or before separated, its sulfur pregnant solution is that cycloalkyl is plumbous, cycloalkyl zinc, cycloalkyl copper, cycloalkyl nickel, cycloalkyl calcium, sulfonated phthalocyanine cobalt, poly-Cobalt Phthalocyanine, sulfonated phthalocyanine nickel, poly-Nickel Phthalocyanine, copper chloride, copper bromide, Copper diiodide, cobaltous chloride, cobalt sulfide, silver nitrate, Palladous chloride., palladium iodide, palladium sulfate, oxalic acid palladium, one or more in ferrous sulfate and zinc acetate, solvent is initial boiling point hydrocarbon liquid more than 110 DEG C, boiling point organic oxygen-containing compound more than 110 DEG C and one or more in initial boiling point oil product more than 110 DEG C.But its Advantageous Effects obtains by improving sulfur removal technology, and the sulfur pregnant solution of its use all contains heavy metal, and high boiling point high sulfur component containing desulfurizing agent is follow-up needs to carry out hydrotreatment or catalytic cracking processes, heavy metal is poisoning easily caused by follow-up hydrogenation or catalytic cracking catalyst, therefore affects the disposal ability of follow-up hydrogenation or catalytic cracking.
CN105130763A provides the sulfur method of a kind of methyl tertiary butyl ether(MTBE), and from tower lower part, methyl tertiary butyl ether(MTBE) is delivered to desulfurizing tower, and column bottom temperature is 80～110 DEG C, loads Fe-HMS molecular sieve catalyst, peroxide agent H in desulfurizing tower2O2Entering from tower top, tower top temperature is 50～70 DEG C.The MTBE total sulfur content that the method obtains is below 10ppm, has reached state 5 standard, but the method adopts Fe-HMS molecular sieve catalyst and peroxide agent H2O2As desulfurizing agent, regenerating molecular sieve equipment and complicated operation, the method carries out in desulfurizing tower simultaneously, adds equipment and running cost.
Therefore, a kind of methyl tertiary butyl ether(MTBE) desulfurizing agent of research and development, add a small amount of desulfurizing agent and just can effectively reduce methyl tertiary butyl ether(MTBE) sulfur content merely with existing catalytic distillation device to lower than 10mg/kg, and desulfurizing agent is without metallic element, follow-up hydrogenation will not be caused or catalytic cracking catalyst is poisoning just has great importance.
Summary of the invention
First purpose of the present invention is in that to provide a kind of methyl tertiary butyl ether(MTBE) desulfurizing agent, to overcome technological deficiency of the prior art, there is desulfurizing agent addition few, feature without metallic element, just effectively the sulfur content in methyl tertiary butyl ether(MTBE) can be reduced to below 10mg/kg merely with existing catalytic distillation device, even be reduced to 2mg/kg.
Second purpose of the present invention is in that to provide the using method of a kind of methyl tertiary butyl ether(MTBE) desulfurizing agent.
For solving above-mentioned technical problem, the present invention adopts the following technical scheme that
A kind of methyl tertiary butyl ether(MTBE) desulfurizing agent, the active component of described desulfurizing agent includes styrene compound, and described styrene compound is one or more in styrene, methyl styrene, ethyl styrene, propylstyrene and butylstyrene.
Described methyl styrene is one or more the mixture in α-methyl styrene, o-methyl styrene, a methyl styrene and p-methylstyrene.
Described ethyl styrene is one or more the mixture in α-ethyl styrene, adjacent ethyl styrene, an ethyl styrene and p-ethyl-styrene.
Described propylstyrene is α-propylstyrene, adjacent propylstyrene, a propylstyrene and the mixture to one or more in propylstyrene.
Described butylstyrene is α-butylstyrene, adjacent butylstyrene, a butylstyrene and the mixture to one or more in butylstyrene.
According to a preferred embodiment of the invention, described active component also includes indene compounds.
Further, described indene compounds is one or more in indenes, methyl indenes, ethyl indenes, propyl group indenes and butyl indenes.
According to a preferred embodiment of the invention, described active component also includes benzofuran, dicyclopentadiene and one or more in cyclopentadiene.
According to a preferred embodiment of the invention, described desulfurizing agent also includes one or more organic solvents, and described organic solvent is one or more in boiling point fraction oil of petroleum between 100～500 DEG C, aromatic hydrocarbons, solvent naphtha, phenol, alcohol, ether, ester and nonionic surfactant.
According to the present invention, by percentage to the quality, in described desulfurizing agent, the content of active component is 2～100%, and the content of described organic solvent is 0～98%.
The using method of the methyl tertiary butyl ether(MTBE) desulfurizing agent of the present invention, comprises the technical steps that:
1) described methyl tertiary butyl ether(MTBE) desulfurizing agent is mixed with sulfur methyl tertiary butyl ether raw material at 5～150 DEG C, obtain mixed material.
2) step 1) described in mixed material isolate high boiling point high sulfur component through distillation column or desulfurization rectifying column, obtain the methyl tertiary butyl ether(MTBE) of super-low sulfur.
According to a preferred embodiment of the invention, the 100～10000mg/kg that addition is sulfur methyl tertiary butyl ether raw materials quality of described methyl tertiary butyl ether(MTBE) desulfurizing agent.
Preferably, described methyl tertiary butyl ether(MTBE) desulfurizing agent and the sulfide in sulfur methyl tertiary butyl ether raw material react, the rear section of complexation and extraction returns and recycles.
Compared with prior art, the methyl tertiary butyl ether(MTBE) desulfurizing agent of the present invention has following Advantageous feature:
1) the methyl tertiary butyl ether(MTBE) desulfurizing agent of the present invention is without metallic element, thus without the heavy metal poisoning causing hydrogenation or catalytic cracking catalyst, thus follow-up hydrogenation or catalytic cracking disposal ability can be improved.
2) the methyl tertiary butyl ether(MTBE) desulfurizing agent addition of the present invention is few, adds 100～10000mg/kg and the sulfur of the methyl tertiary butyl ether(MTBE) raw material of sulfur-bearing 120mg/kg just can be reduced to below 10mg/kg, minimum is reduced to 2mg/kg.
3) the methyl tertiary butyl ether(MTBE) desulfurizing agent of the present invention may be directly applied to existing methyl tertiary butyl ether(MTBE) catalytic distillation device, need not increase desulfurization distillation column separating step and also can effectively reduce sulfur content to below 10mg/kg after catalytic distillation tower.
Accompanying drawing explanation
The MTBE desulfurization process schematic diagram of Fig. 1 embodiment 9.
Fig. 2 desulfurizing agent after catalytic distillation tower feed exchanger with MTBE mixing desulfurization process schematic diagram.
Fig. 3 desulfurizing agent is introduced into catalytic reactor after mixing homogeneously with methanol and mixing C4 before catalytic reactor, subsequently into catalytic distillation tower desulfurization process schematic diagram.
The MTBE desulfurization process schematic diagram of Fig. 4 embodiment 10.
Wherein: 1-catalytic reactor, 2-catalytic distillation tower, 3-desulfurizing agent dosing pump, 4-desulfurizing agent tank, 5-catalytic distillation tower feed exchanger, 6-desulfurization distillation column, 7-desulfurizing agent part pipeloop.
Detailed description of the invention
Below by way of specific embodiment, the present invention is described in further details.Should be understood that following example are merely to illustrate the present invention not for limiting the scope of the present invention.
Methyl tertiary butyl ether(MTBE) raw material M1 (Shanghai Petrochemicals Company Ltd, sulfur content is 120mg/kg), methyl tertiary butyl ether(MTBE) raw material M2 (Anhui haydite oil Chemical Co., Ltd., sulfur content is 252mg/kg), other components are commercially available.
The mixed methyl styrene used in following example is: α-methyl styrene: o-methyl styrene: a methyl styrene and: p-methylstyrene=1:3:3:3, mixing ethyl styrene is: adjacent ethyl styrene a: ethyl styrene: p-ethyl-styrene=3:2:5.
Degree involved in following example, except indicating especially, is mass percentage content.
Methyl tertiary butyl ether(MTBE) desulfurizing agent formula:
MTBE desulfurizing agent formula is as described in Table 1:
Table 1, MTBE desulfurizing agent formula
Methyl tertiary butyl ether(MTBE) desulfurizing agent test method:
1) being mixed with certain proportion with desulfurizing agent by MTBE raw material M1 or M2, inject continuous equilibrium gasification distilling apparatus flash distillation by dosing pump, controlling bottom temperature is 90 DEG C, collects materials at bottom of tower and overhead F1；
2) overhead F1 and desulfurizing agent being mixed according to a certain percentage, again through continuous equilibrium gasification distilling apparatus flash distillation, controlling bottom temperature is 90 DEG C, collects materials at bottom of tower and overhead F2；
3) overhead F2 and desulfurizing agent are mixed according to a certain percentage, and again through continuous equilibrium gasification distilling apparatus flash distillation, controlling bottom temperature is 90 DEG C, collects materials at bottom of tower and overhead F3；
4) sulfur content of sulfur-bearing MTBE raw material and overhead F3 is analyzed by gas chromatographicanalyzer.
Embodiment 1
Add in desulfurizing agent 500mg/kg to the MTBE raw material M1 of formula 1, according to above-mentioned methyl tertiary butyl ether(MTBE) desulfurizing agent test method desulfurization, analyze the sulfur content in overhead F3.
Embodiment 2
Add in desulfurizing agent 240mg/kg to the MTBE raw material M1 of formula 2, according to above-mentioned methyl tertiary butyl ether(MTBE) desulfurizing agent test method desulfurization, analyze the sulfur content in overhead F3.
Embodiment 3
Add in desulfurizing agent 500mg/kg to the MTBE raw material M1 of formula 3, according to above-mentioned methyl tertiary butyl ether(MTBE) desulfurizing agent test method desulfurization, analyze the sulfur content in overhead F3.
Embodiment 4
Add in desulfurizing agent 650mg/kg to the MTBE raw material M1 of formula 4, according to above-mentioned methyl tertiary butyl ether(MTBE) desulfurizing agent test method desulfurization, analyze the sulfur content in overhead F3.
Embodiment 5
Add in desulfurizing agent 3000mg/kg to the MTBE raw material M1 of formula 5, according to above-mentioned methyl tertiary butyl ether(MTBE) desulfurizing agent test method desulfurization, analyze the sulfur content in overhead F3.
Embodiment 6
Add in desulfurizing agent 700mg/kg to the MTBE raw material M1 of formula 6, according to above-mentioned methyl tertiary butyl ether(MTBE) desulfurizing agent test method desulfurization, analyze the sulfur content in overhead F3.
Embodiment 7
Add in desulfurizing agent 800mg/kg to the MTBE raw material M2 of formula 7, according to above-mentioned methyl tertiary butyl ether(MTBE) desulfurizing agent test method desulfurization, analyze the sulfur content in overhead F3.
Embodiment 8
Add in desulfurizing agent 800mg/kg to the MTBE raw material M2 of formula 8, according to above-mentioned methyl tertiary butyl ether(MTBE) desulfurizing agent test method desulfurization, analyze the sulfur content in overhead F3.
Comparative example 1
Add 50000mg/kg mixed xylenes in MTBE raw material M1, according to above-mentioned methyl tertiary butyl ether(MTBE) desulfurizing agent test method desulfurization, analyze the sulfur content in overhead F3.
Comparative example 2
Add 50000mg/kg mixing trimethylbenzene in MTBE raw material M1, according to above-mentioned methyl tertiary butyl ether(MTBE) desulfurizing agent test method desulfurization, analyze the sulfur content in overhead F3.
Comparative example 3
Add 100000mg/kg reformation heavy aromatics in MTBE raw material M1, according to above-mentioned methyl tertiary butyl ether(MTBE) desulfurizing agent test method desulfurization, analyze the sulfur content in overhead F3.
Comparative example 4
Add 10000mg/kg furfural in MTBE raw material M1, according to above-mentioned methyl tertiary butyl ether(MTBE) desulfurizing agent test method desulfurization, analyze the sulfur content in overhead F3.
Analyzing the sulfur content in embodiment 1-8 and comparative example 1-4 overhead F3, result is as shown in table 2.
Analysis of sulfur content result in table 2, overhead F3
Be can be seen that by the result of table 2, compare comparative example 1-4, the present invention can significantly reduce sulfur content in methyl tertiary butyl ether(MTBE) raw material to below 10mg/kg, most mental retardation is reduced to 2mg/kg, meet environmental protection and newly advise state V standard requiring content of sulfur in gasoline to reach, and considerably reduce the addition of desulfurizing agent, simultaneously the desulfurizing agent of the present invention is without metallic element, does not result in the poisoning of hydrogenation or catalytic cracking catalyst in the hydrotreatment of the follow-up high boiling point high sulfur component containing desulfurizing agent or catalytic cracking process.
Embodiment 9: commercial Application
100,000 tons/year of MTBE process units of certain company, carry out MTBE desulfurization to it.Desulfurizing agent consists of: indenes 10%, methyl indenes 20%, mixed methyl styrene 15%, mixes ethyl styrene 4%, dihydronaphthalene 6%, naphthalene 5%, methyl naphthalene 5%, heavy aromatic solvent oil 35%.
Specifically comprises the processes of: adding before catalytic distillation tower feed exchanger relative to product MTBE is the desulfurizing agent of 600mg/kg, MTBE product is extracted out from the bottom side line gas phase of tower, desulfurizing agent and the sulfide in methyl tertiary butyl ether(MTBE) raw material react, the rear section of complexation and extraction returns and recycles, and technological process is as shown in Figure 1.
Analyze after testing, the MTBE product sulfur content being not added with desulfurizing agent is 120mg/kg, with the addition of the MTBE product sulfur content after desulfurizing agent is 5mg/kg, illustrate that the desulfurizing agent only adding a small amount of present invention in catalytic distillation device just can significantly decrease the sulfur content in methyl tertiary butyl ether(MTBE) to below 10mg/kg, meet state's V standard.
Embodiment 10: commercial Application
120,000 tons/year of MTBE process units of certain company, have desulfurization distillation column, it are carried out MTBE desulfurization.Desulfurizing agent consists of: methyl indenes 10%, mixed methyl styrene 40%, mixes ethyl styrene 20%, capryl alcohol 10%, solvent naphtha 15%, methyl naphthalene 5%.
Specifically comprises the processes of: adding after catalytic distillation tower relative to product MTBE is the desulfurizing agent of 500mg/kg, enters desulfurization distillation column with sulfur methyl tertiary butyl ether after mixing homogeneously, and extracts MTBE product out from the bottom side line gas phase of tower, and technological process is as shown in Figure 4.
Analyze after testing, the MTBE product sulfur content not carrying out desulfurization process is 120mg/kg, with the addition of the MTBE product sulfur content after desulfurizing agent is 2mg/kg, the desulfurizing agent illustrating to add a small amount of present invention in desulfurizing tower technique the sulfur content in methyl tertiary butyl ether(MTBE) can be reduced to 2mg/kg by force, meets state's V standard.
Above specific embodiments of the invention being described in detail, but it is only used as example, the present invention is not restricted to particular embodiments described above.The MTBE desulfurizing agent of the present invention can also enter catalytic distillation tower (as shown in Figure 2) with MTBE mixtures material after mixing after catalytic distillation tower feed exchanger, or enter catalytic reactor after mixing homogeneously with methanol and mixing C4 before catalytic reactor, subsequently into catalytic distillation tower (as shown in Figure 3).To those skilled in the art, any equivalent modifications that this practicality is carried out and replacement are also all among scope of the invention.Therefore, the equalization made without departing from the spirit and scope of the invention converts and amendment, all should contain within the scope of the invention.
Claims (10)
1. a methyl tertiary butyl ether(MTBE) desulfurizing agent, it is characterised in that the active component of described desulfurizing agent includes styrene compound.
2. methyl tertiary butyl ether(MTBE) desulfurizing agent as claimed in claim 1, it is characterised in that described styrene compound is one or more in styrene, methyl styrene, ethyl styrene, propylstyrene and butylstyrene.
3. methyl tertiary butyl ether(MTBE) desulfurizing agent as claimed in claim 1, it is characterised in that described active component also includes indene compounds.
4. methyl tertiary butyl ether(MTBE) desulfurizing agent as claimed in claim 3, it is characterised in that described indene compounds is one or more in indenes, methyl indenes, ethyl indenes, propyl group indenes and butyl indenes.
5. methyl tertiary butyl ether(MTBE) desulfurizing agent as claimed in claim 1, it is characterised in that described active component also includes benzofuran, dicyclopentadiene and one or more in cyclopentadiene.
6. the methyl tertiary butyl ether(MTBE) desulfurizing agent as according to any one of Claims 1 to 5, it is characterized in that, described desulfurizing agent also includes one or more organic solvents, and described organic solvent is one or more in boiling point fraction oil of petroleum between 100～500 DEG C, aromatic hydrocarbons, solvent naphtha, phenol, alcohol, ether, ester and nonionic surfactant.
7. methyl tertiary butyl ether(MTBE) desulfurizing agent as claimed in claim 6, it is characterised in that by percentage to the quality, in described desulfurizing agent, the content of active component is 2～100%, and the content of described organic solvent is 0～98%.
8. the using method of the methyl tertiary butyl ether(MTBE) desulfurizing agent as according to any one of claim 1～7, it is characterised in that comprise the technical steps that:
1) described methyl tertiary butyl ether(MTBE) desulfurizing agent is mixed with sulfur methyl tertiary butyl ether raw material at 5～150 DEG C, obtain mixed material.
2) step 1) described in mixed material isolate high boiling point high sulfur component through distillation column or desulfurization rectifying column, obtain the methyl tertiary butyl ether(MTBE) of super-low sulfur.
9. using method as claimed in claim 8, it is characterised in that the 100～10000mg/kg that addition is sulfur methyl tertiary butyl ether raw materials quality of described methyl tertiary butyl ether(MTBE) desulfurizing agent.
10. using method as claimed in claim 8, it is characterised in that described methyl tertiary butyl ether(MTBE) desulfurizing agent and the sulfide in sulfur methyl tertiary butyl ether raw material reacts, the rear section return recycling of complexation and extraction.
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| CN108503516A (en) * | 2017-02-28 | 2018-09-07 | 中国石油化工股份有限公司 | Remove the liquid desulfuration purification agent and its preparation method and application of sulfide in methyl tertiary butyl ether(MTBE) |
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