CN111377788A - Method for oligomerization of isobutene - Google Patents
Method for oligomerization of isobutene Download PDFInfo
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- CN111377788A CN111377788A CN201811622909.5A CN201811622909A CN111377788A CN 111377788 A CN111377788 A CN 111377788A CN 201811622909 A CN201811622909 A CN 201811622909A CN 111377788 A CN111377788 A CN 111377788A
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- isobutene
- sulfone
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- oligomerization
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- VQTUBCCKSQIDNK-UHFFFAOYSA-N Isobutene Chemical compound CC(C)=C VQTUBCCKSQIDNK-UHFFFAOYSA-N 0.000 title claims abstract description 114
- 238000006384 oligomerization reaction Methods 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims description 34
- 239000003054 catalyst Substances 0.000 claims abstract description 50
- 238000006243 chemical reaction Methods 0.000 claims abstract description 38
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims abstract description 23
- 150000003457 sulfones Chemical class 0.000 claims abstract description 18
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000003153 chemical reaction reagent Substances 0.000 claims abstract description 16
- 229920005989 resin Polymers 0.000 claims abstract description 14
- 239000003729 cation exchange resin Substances 0.000 claims abstract description 13
- 239000000539 dimer Substances 0.000 claims abstract description 13
- 239000002253 acid Substances 0.000 claims abstract description 12
- 239000011347 resin Substances 0.000 claims abstract description 12
- NTIZESTWPVYFNL-UHFFFAOYSA-N Methyl isobutyl ketone Chemical compound CC(C)CC(C)=O NTIZESTWPVYFNL-UHFFFAOYSA-N 0.000 claims abstract description 8
- UIHCLUNTQKBZGK-UHFFFAOYSA-N Methyl isobutyl ketone Natural products CCC(C)C(C)=O UIHCLUNTQKBZGK-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims abstract description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 17
- 238000002791 soaking Methods 0.000 claims description 13
- HHVIBTZHLRERCL-UHFFFAOYSA-N sulfonyldimethane Chemical compound CS(C)(=O)=O HHVIBTZHLRERCL-UHFFFAOYSA-N 0.000 claims description 12
- 229910052757 nitrogen Inorganic materials 0.000 claims description 8
- 239000011261 inert gas Substances 0.000 claims description 7
- HXJUTPCZVOIRIF-UHFFFAOYSA-N sulfolane Chemical compound O=S1(=O)CCCC1 HXJUTPCZVOIRIF-UHFFFAOYSA-N 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 4
- 239000001301 oxygen Substances 0.000 claims description 4
- 229910052760 oxygen Inorganic materials 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 230000002378 acidificating effect Effects 0.000 claims description 3
- 239000012153 distilled water Substances 0.000 claims description 3
- MBDUIEKYVPVZJH-UHFFFAOYSA-N 1-ethylsulfonylethane Chemical compound CCS(=O)(=O)CC MBDUIEKYVPVZJH-UHFFFAOYSA-N 0.000 claims description 2
- YBJCDTIWNDBNTM-UHFFFAOYSA-N 1-methylsulfonylethane Chemical compound CCS(C)(=O)=O YBJCDTIWNDBNTM-UHFFFAOYSA-N 0.000 claims description 2
- JEXYCADTAFPULN-UHFFFAOYSA-N 1-propylsulfonylpropane Chemical compound CCCS(=O)(=O)CCC JEXYCADTAFPULN-UHFFFAOYSA-N 0.000 claims description 2
- PPDFQRAASCRJAH-UHFFFAOYSA-N 2-methylthiolane 1,1-dioxide Chemical compound CC1CCCS1(=O)=O PPDFQRAASCRJAH-UHFFFAOYSA-N 0.000 claims description 2
- JEIQEQBAZNCTKR-UHFFFAOYSA-N 3-butylthiolane 1,1-dioxide Chemical compound CCCCC1CCS(=O)(=O)C1 JEIQEQBAZNCTKR-UHFFFAOYSA-N 0.000 claims description 2
- XWVQGSWWPONKGD-UHFFFAOYSA-N 3-propylthiolane 1,1-dioxide Chemical compound CCCC1CCS(=O)(=O)C1 XWVQGSWWPONKGD-UHFFFAOYSA-N 0.000 claims description 2
- 238000001035 drying Methods 0.000 claims description 2
- 238000005406 washing Methods 0.000 claims description 2
- -1 carbonium ions Chemical class 0.000 abstract description 10
- 229920000642 polymer Polymers 0.000 abstract description 4
- 230000036632 reaction speed Effects 0.000 abstract description 4
- 238000001179 sorption measurement Methods 0.000 abstract description 3
- 230000003197 catalytic effect Effects 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
- BZLVMXJERCGZMT-UHFFFAOYSA-N Methyl tert-butyl ether Chemical compound COC(C)(C)C BZLVMXJERCGZMT-UHFFFAOYSA-N 0.000 description 5
- DKGAVHZHDRPRBM-UHFFFAOYSA-N Tert-Butanol Chemical compound CC(C)(C)O DKGAVHZHDRPRBM-UHFFFAOYSA-N 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 239000006004 Quartz sand Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000003377 acid catalyst Substances 0.000 description 2
- 239000003456 ion exchange resin Substances 0.000 description 2
- 229920003303 ion-exchange polymer Polymers 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000011973 solid acid Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000013638 trimer Substances 0.000 description 2
- RGYAVZGBAJFMIZ-UHFFFAOYSA-N 2,3-dimethylhex-2-ene Chemical compound CCCC(C)=C(C)C RGYAVZGBAJFMIZ-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007337 electrophilic addition reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 125000000383 tetramethylene group Chemical group [H]C([H])([*:1])C([H])([H])C([H])([H])C([H])([H])[*:2] 0.000 description 1
- JOXIMZWYDAKGHI-UHFFFAOYSA-N toluene-4-sulfonic acid Chemical compound CC1=CC=C(S(O)(=O)=O)C=C1 JOXIMZWYDAKGHI-UHFFFAOYSA-N 0.000 description 1
- 125000003944 tolyl group Chemical group 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2/00—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms
- C07C2/02—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by addition between unsaturated hydrocarbons
- C07C2/04—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by addition between unsaturated hydrocarbons by oligomerisation of well-defined unsaturated hydrocarbons without ring formation
- C07C2/06—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by addition between unsaturated hydrocarbons by oligomerisation of well-defined unsaturated hydrocarbons without ring formation of alkenes, i.e. acyclic hydrocarbons having only one carbon-to-carbon double bond
- C07C2/08—Catalytic processes
- C07C2/26—Catalytic processes with hydrides or organic compounds
- C07C2/28—Catalytic processes with hydrides or organic compounds with ion-exchange resins
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2531/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- C07C2531/02—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides
- C07C2531/06—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides containing polymers
- C07C2531/08—Ion-exchange resins
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Catalysts (AREA)
Abstract
The oligomerization reaction of isobutene in reactor with resin catalyst is carried out by passing the mixture of isobutene and sulfone reagent through reactor to obtain dimer. The weight of the sulfone reagent in the mixture of the isobutene and the sulfone reagent is 0.05-10% of that of the isobutene. The adopted catalyst is strong acid cation exchange resin, and toluene and methyl isobutyl ketone are preferably used for modification and then catalytic oligomerization reaction is carried out. Due to the existence of sulfones, the adsorption capacity of isobutene on the surface of the catalyst is reduced, the reaction speed of isobutene forming two carbonium ions to polymerize to form a dimer under the action of an acid center of the catalyst is increased, and the reaction speed of three carbonium ions or a plurality of carbonium ions to further polymerize to form a polymer is simulated, so that the selectivity of isobutene dimer is increased, and meanwhile, the higher isobutene conversion rate can be maintained.
Description
Technical Field
The invention relates to a method for oligomerization of isobutene, in particular to a process method for effectively improving isobutene conversion rate and dimer selectivity.
Background
At present, isobutene is mostly used for synthesizing methyl tert-butyl ether (MTBE) and is used as a blending component of high-octane motor gasoline. However, this method using isobutylene has become unreasonable due to the serious pollution effect of methyl t-butyl ether on groundwater. Thus, is C4The isobutene in the fraction is more reasonably soughtThe utilization approach has very important practical significance.
The oligomerization of low-carbon olefin is one of the important chemical processes in the oil refining and organic chemical industry, wherein the oligomerization product of butylene is an important chemical intermediate, can be used for producing oligomerization gasoline and diesel oil, and can also be used as an important intermediate for producing detergents, plasticizers, additives and pesticides.
The oligomerization of isobutene is a typical acid-catalyzed reaction, and the catalyst mainly comprises a liquid acid catalyst and a solid acid catalyst. When liquid acid catalysts (sulfuric acid, methyl benzenesulfonic acid and the like) are adopted in the early stage, the reaction selectivity is poor, the purity of the product isobutene dimer is low, the catalysts are not easy to separate and corrode equipment, and the production process is difficult to realize continuously. In recent years, solid acid catalysts have gradually become hot spots for research on oligomerization of isobutene, and mainly include solid phosphoric acid catalysts, oxides and composite oxide catalysts, molecular sieve catalysts, ion exchange resin catalysts, supported sulfate catalysts, solid super acidic catalysts and the like.
At present, ion exchange resin is generally adopted as a catalyst for isobutene oligomerization, and in order to improve the selectivity of isobutene dimer, a solvent is added into a reaction system to reduce the generation of isobutene dimer.
Petrochemical 2007, volume 36, phase 3 reports that strong-acid cation exchange resin in tertiary butanol catalyzes oligomerization kinetics of isobutylene, and oligomerization kinetics of isobutylene (m) in a strong-acid cation exchange resin (catalyst) and tertiary butanol system is studied. The result shows that isobutene oligomerization has the characteristic of first-order series irreversible reaction, and the addition of tertiary butanol in a reaction system can reduce the acidity of the catalyst, but improve the adsorption capacity of isobutene on the surface of the catalyst, and obviously improve the selectivity of a dimer (trimethylpentene) of isobutene, but reduce the conversion rate.
Disclosure of Invention
Aiming at the problems of low conversion rate or low dimer selectivity in an isobutene oligomerization reaction system in the prior art, the invention provides the isobutene oligomerization reaction method, so that the selectivity of the dimer can be obviously improved on the basis of keeping higher isobutene conversion rate of the reaction, and the subsequent products are easier to separate and the energy consumption is lower.
The oligomerization reaction of isobutene in reactor with resin catalyst is carried out by passing the mixture of isobutene and sulfone reagent through reactor to obtain dimer.
In the method, the weight of the sulfone reagent in the mixture of the isobutene and the sulfone reagent is 0.05-10% of that of the isobutene, and preferably 0.5-2.0%.
In the above method, the sulfone reagent is at least one selected from the group consisting of sulfolane, 2-methylsulfolane, 3-propylsulfolane, 3-butylsulfolane, dimethylsulfone, diethylsulfone, methylethylsulfone, and dipropylsulfone, and preferably at least one selected from the group consisting of sulfolane and dimethylsulfone.
In the above method, the specific operating conditions of the isobutylene oligomerization reaction are as follows: the liquid hourly space velocity of isobutene is 1.0h-1～18.0h-1The reaction temperature is 100-200 ℃, and the reaction pressure is 1.0-5.0 MPa. Further, it is preferable that: the liquid hourly space velocity of isobutene is 2.0h-1～6.0h-1The reaction temperature is 120-160 ℃, and the reaction pressure is 2.0-3.0 MPa.
In the above process, the catalyst used is a resin catalyst which is disclosed in the prior art and can be used for oligomerization of isobutylene, specifically a strong acid cation exchange resin, more preferably a temperature-resistant strong acid cation exchange resin, and a commercially available product can be used or the catalyst can be prepared by the prior art, specifically a DNW-i type strong acid cation exchange resin catalyst manufactured by dandong pearl special resin limited.
In the method, as further optimization, the strong acid cation exchange resin catalyst is modified and then catalyzed for oligomerization by the following method, ① is soaked in toluene at 50-130 ℃ for 8-24 h, ② is soaked in methyl isobutyl ketone at 50-120 ℃ for 4-24 h, ③ is soaked in distilled water with oxygen content less than or equal to 10mg/L, inert gas or nitrogen is introduced simultaneously, the soaking is carried out in three stages, the first stage is carried out under the conditions that the pressure is 0.5-1.0 MPa, the temperature is 65-80 ℃ for 8-12 h, the inert gas is introduced, the second stage is carried out under the conditions that the pressure is 0.9-1.0 MPa, the temperature is 85-100 ℃ for 12-24 h, the third stage is carried out under the conditions that the pressure is 1.0-1.5 MPa, the temperature is 120-140 ℃ for 12-24 h, and the modified cation exchange resin catalyst is obtained by washing and drying.
In the above method, further, when the catalyst is modified, the volume ratio of the toluene or methyl isobutyl ketone to the resin catalyst in ① and ② is 5-10: 1, preferably 5-8: 1, and most preferably 5-6: 1.
In the method, further, when the catalyst is modified, the soaking temperature in ① is preferably 80-120 ℃, and the soaking time is preferably 10-16 h.
In the method, when the catalyst is modified, the soaking temperature in ② is preferably 60-80 ℃, and the soaking time is preferably 6-12 h.
In the above method, further, when the catalyst is modified, the flow rate of the inert gas or nitrogen gas introduced during the first stage of the soaking in ③ is 20m3/h～50m3H, the flow rate of the inert gas or the nitrogen introduced in the soaking process of the second stage is 10m3/h～25m3The flow rate of the inert gas or the nitrogen introduced in the soaking process of the third stage is 5m3/h～10m3/h。
In the above method, further, when the catalyst is modified, the oxygen content of the distilled water in ③ is preferably 5mg/L or less, and most preferably 3mg/L or less, as a preferable embodiment, in terms of the conditions of 25 ℃ and 100 kPa.
The mechanism of oligomerization of isobutene over acidic catalysts is as follows: isobutene is firstly adsorbed on the surface of a catalyst, then carbonium ions are formed under the action of an acid center of the catalyst, two carbonium ions are polymerized to generate dimers, or three carbonium ions are polymerized to generate trimers, a plurality of carbonium ions are polymerized to generate polymers, and the reaction of oligomerization of isobutene to generate dimers, trimers and polymers belongs to electrophilic addition reaction. The sulfone reagent is added into the reaction system, under the condition of isobutene oligomerization reaction, due to the existence of sulfones, the adsorption capacity of isobutene on the surface of the catalyst is reduced, the reaction speed of isobutene forming two carbonium ions to polymerize into a dimer under the action of an acid center of the catalyst is increased, and the reaction speed of three carbonium ions or a plurality of carbonium ions to further polymerize into a polymer is simulated, so that the selectivity of isobutene dimer is increased, and the high isobutene conversion rate can be maintained.
Detailed Description
The invention is further described below by means of specific examples. The conversion of isobutylene and the selectivity for dimer alcohol in examples and comparative examples were calculated by the following formulas.
In examples 1 to 10, a DNW-I type temperature-resistant strong acid cation exchange resin catalyst (manufacturer: Special resin of Dandeng Mingzhu Co., Ltd.) was used to catalyze the oligomerization of isobutylene:
examples 1 to 5
The oligomerization reaction adopts a fixed bed reactor, the size of the fixed bed reactor is phi 20mm × 1000mm, the material is a stainless steel single tube, the reactor is filled in three sections, the bottom of the reactor is filled with a certain amount of quartz sand, the middle section of the reactor is filled with 30mL of DNW-I type temperature-resistant strong acid cation exchange resin catalyst (manufacturer: Dandonggu special resin Co., Ltd.), the properties of the catalyst are shown in Table 1, the top of the reactor is filled with quartz sand until the reactor is filled, nitrogen is used for replacing air in the fixed bed reactor, after the airtightness is qualified, isobutene and sulfolane are fed into a preheater by using a metering pump according to the required proportion, the reaction materials are preheated, the preheated reaction materials enter the fixed bed reactor for reaction, the reaction temperature is kept at 120 ℃, the reaction pressure is 3.0MPa, unreacted materials are recycled, the mixing proportion of isobutene and sulfolane during the reaction, the volume airspeed of isobutene and other reaction conditions are shown in Table 2, and the reaction results of isobutene conversion.
Examples 6 to 10
The experimental setup was as above, changing sulfolane to dimethylsulfone, the reaction conditions such as the mixing ratio of isobutylene and dimethylsulfone, the volumetric space velocity of isobutylene and the like during the reaction are shown in Table 3, and the reaction results of isobutylene conversion and dimer selectivity are also shown in Table 3.
In examples 11 to 20, the oligomerization of isobutylene was catalyzed by DNW-I type temperature resistant strong acid cation exchange resin catalyst (manufacturer: Special resin of Dandeng Bright bead, Ltd.) modified with toluene and methyl isobutyl ketone:
examples 11 to 20
The DNW-I type temperature-resistant strong acid cation exchange resin catalyst (the manufacturer: Special resin Co., Ltd., Deng Dong Mingzhu) is soaked in toluene at 80 ℃ for 16h, then soaked in methyl isobutyl ketone at 60 ℃ for 12h after being filtered, washed and dried, and the volume ratio of the toluene or the methyl isobutyl ketone to the resin catalyst is 10: 1. placing the catalyst in deoxygenated water with oxygen content of 3mg/L at 20 m/hr3Flowing nitrogen, and soaking at 65 deg.C under 0.6MPa for 16 h; the nitrogen flow rate was then adjusted to 15m3Soaking for 18 hours at 90 ℃ under the pressure of 1.0 MPa; the nitrogen flow rate was adjusted to 5m3And/h, soaking for 24h under the conditions that the pressure is increased to 1.5MPa and the temperature is increased to 140 ℃, and obtaining the modified resin catalyst after the treatment is finished.
The operation method of the modified catalyst used for the oligomerization of isobutylene is the same as that of example 1, and the types of sulfone reagents used and other specific reaction conditions and results are shown in Table 4.
Comparative examples 1 to 2
The procedure of example 1 was followed, with only isobutene being fed in, and the other specific reaction conditions are shown in Table 5. The results are shown in Table 5.
Comparative examples 3 to 4
Isobutylene and t-butanol, an organic solvent, were added to the feed in accordance with the procedure of example 1, and other specific reaction conditions are shown in Table 5. The results are shown in Table 5.
TABLE 1
TABLE 2
TABLE 3
TABLE 4
TABLE 5
Claims (10)
1. The oligomerization reaction method of isobutene is characterized by that the mixture formed from isobutene and sulfone reagent is passed through a reactor containing resin catalyst, and the oligomerization reaction of isobutene can be implemented to obtain dimer.
2. The method according to claim 1, wherein the weight of the sulfone reagent in the mixture of isobutylene and the sulfone reagent is 0.05-10% of the weight of isobutylene.
3. The method according to claim 2, wherein the weight of the sulfone reagent in the mixture of isobutylene and the sulfone reagent is 0.5-2.0% of the weight of isobutylene.
4. The method of claim 1, wherein the sulfone reagent is selected from at least one of sulfolane, 2-methyl sulfolane, 3-propyl sulfolane, 3-butyl sulfolane, dimethyl sulfone, diethyl sulfone, methyl ethyl sulfone, and dipropyl sulfone.
5. The method according to claim 4, wherein the sulfone reagent is selected from at least one of sulfolane and dimethylsulfone.
6. The method according to claim 1, wherein the specific operating conditions for the oligomerization of isobutene are as follows: the liquid hourly space velocity of isobutene is 1.0h-1～18.0h-1The reaction temperature is 100-200 ℃, and the reaction pressure is 1.0-5.0 MPa.
7. The process as claimed in claim 6, wherein the liquid hourly space velocity of the isobutene is 2.0h-1～6.0h-1The reaction temperature is 120-160 ℃, and the reaction pressure is 2.0-3.0 MPa.
8. The method of claim 1, wherein the resin catalyst is a strong acid cation exchange resin.
9. The method of claim 8, wherein the strongly acidic cation exchange resin catalyst is modified and then catalyzed for oligomerization by a method comprising the steps of firstly soaking ① in toluene at 50-130 ℃ for 8-24 hours, ② in methyl isobutyl ketone at 50-120 ℃ for 4-24 hours, ③ in distilled water with an oxygen content of 10mg/L or less, and simultaneously introducing an inert gas or nitrogen, wherein the soaking is performed in three stages, namely, the first stage is performed under a pressure of 0.5-1.0 MPa, the temperature of 65-80 ℃ for 8-12 hours, and the inert gas is introduced, the second stage is performed under a pressure of 0.9-1.0 MPa, the temperature of 85-100 ℃ for 12-24 hours, the third stage is performed under a pressure of 1.0-1.5 MPa, the temperature of 120-140 ℃ for 12-24 hours, and the modified cation exchange resin catalyst is obtained by washing and drying.
10. The method of claim 9, wherein the volume ratio of the toluene or methyl isobutyl ketone to the resin catalyst in ① and ② is 5-10: 1.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113527025A (en) * | 2021-06-24 | 2021-10-22 | 丹东明珠特种树脂有限公司 | Process for synthesizing pure isobutene by polymerization and catalyst used for polymerization |
| CN114436853A (en) * | 2020-10-31 | 2022-05-06 | 中国石油化工股份有限公司 | Method for preparing tert-butylamine by amination of isobutene |
| CN114436855A (en) * | 2020-10-31 | 2022-05-06 | 中国石油化工股份有限公司 | Method for preparing tert-butylamine from isobutene |
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| US4100220A (en) * | 1977-06-27 | 1978-07-11 | Petro-Tex Chemical Corporation | Dimerization of isobutene |
| CN1835902A (en) * | 2003-08-21 | 2006-09-20 | 三菱丽阳株式会社 | Method for producing tertiary butyl alcohol |
| CN107537568A (en) * | 2016-06-23 | 2018-01-05 | 中国石油化工股份有限公司 | A kind of method of modifying of cationic ion-exchange resin and the method for preparing tert amyl methyl ether(TAME) |
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| CN113527025A (en) * | 2021-06-24 | 2021-10-22 | 丹东明珠特种树脂有限公司 | Process for synthesizing pure isobutene by polymerization and catalyst used for polymerization |
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