CN102936514A - Method for oligomerizing isobutylene - Google Patents
Method for oligomerizing isobutylene Download PDFInfo
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- CN102936514A CN102936514A CN 201210422707 CN201210422707A CN102936514A CN 102936514 A CN102936514 A CN 102936514A CN 201210422707 CN201210422707 CN 201210422707 CN 201210422707 A CN201210422707 A CN 201210422707A CN 102936514 A CN102936514 A CN 102936514A
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- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The invention relates to a method for oligomerizing isobutylene, particularly a method for preparing ring-free olefin with only one C=C double bond from hydrocarbon with smaller carbon atom number. The method comprises the following steps: adding an ionic liquid into a reaction kettle, adding n-hexane, starting stirring, heating, adding 50mL of isobutylene, stirring for some time, relieving the pressure, and collecting all exhaust gas. The invention has the advantages of high catalytic activity and high selectivity; the oligomerized liquid-phase product only contains dimer, trimer, tetramer and pentamer of isobutylene, and does not contain any cracked product.
Description
Technical field
The present invention relates to a kind of method of only having the acyclic olefin of 1 carbon-to-carbon double bond from the less hydrocarbon preparation of carbon atom quantity.
Background technology
The low-carbon alkene oligomerisation is one of chemical process important in oil refining and the organic chemistry industry, wherein the oligomerization product of butylene is important industrial chemicals, can be for the production of oligomerisation gasoline and diesel oil, all right important intermediate as producing washing composition, softening agent, additive and agricultural chemicals.Therefore, butene oligomerization reaction and technological process thereof more and more are subject to people's attention.
The butene oligomerization catalyzer mainly contains the heterogeneous catalysts such as Ziegler type homogeneous catalyst, solid phosphoric acid catalyst, zeolite [molecular sieve and loaded catalyst.The problems such as the activity and selectivity of homogeneous catalyst is all higher, but has reaction product and catalyst separating difficulty, and solvent contamination environment, the process cost of using in the reaction is higher; Heterogeneous catalyst oligomerisation reaction selectivity active and product is all higher, but easy inactivation.Ionic liquid has plurality of advantages and characteristic as a kind of mutually environment amenable solvent and catalyzer, by extensively understanding and acceptance of people.Acidic ion liquid is usually synthetic by the metal halide salt with Lewis acid and organic halogenation salt, and negatively charged ion mostly is Al
2Cl
7 -, Cu
2Cl
5 -In the ion with acidity.Acidic ion liquid has the high-density reactive behavior of liquid acid and the non-volatility of solid acid simultaneously, and its structure and acid adjustable sex change have the potentiality that replace the traditional industry acid catalytic material in addition.
The catalyst system based on ionic liquid of catalyzing butene oligomerization, majority is as reaction solvent take ionic liquid, nickel composite is catalyzer, the character of catalyst precursor has material impact to reactive behavior and selectivity, the participation of ionic liquid may change reaction mechanism, has improved activity, selectivity and the stability of catalyzer.
Summary of the invention
The present invention aims to provide high catalytic activity and isobutene oligomerisation method optionally.
A kind of isobutene oligomerisation method of the present invention comprises ionic liquid is packed in the reactor, adds normal hexane, begins to stir, and heats up, and adds release behind the restir certain hour behind the 50mL iso-butylene, collects whole tail gas.
Preferably, the preparation method of described ionic liquid is: with Triethylammonium chloride, Aluminum chloride anhydrous and normal heptane mix, and are warming up to 150 ℃ and keep 6h, get final product.
More preferably, begin after the stirring temperature to be risen to 40 ℃.
More preferably, normal hexane is 200mL.
More preferably, add behind the 50mL iso-butylene restir 10-60 minute.
More preferably, ionic liquid and alkene volume ratio are 1.2-1.6:1.
More preferably, the stirring velocity behind adding normal hexane and the adding 50mL iso-butylene is 1000-13000r/min.
The present invention has higher catalytic activity and selectivity, all is dimerization, trimerization, the four poly-and five poly-products of iso-butylene in the oligomerisation liquid product, does not have split product.
Embodiment
Embodiment one.
With Triethylammonium chloride, Aluminum chloride anhydrous and normal heptane mix, and are warming up to 150 ℃ and keep 6h, make ionic liquid.The 300mL ionic liquid is packed in the reactor, add the 200mL normal hexane, stir with the rotating speed of 1000r/min, temperature is risen to 40 ℃, the rotating speed that adds behind the 50mL iso-butylene again with 1000r/min stirs release after 10 minutes, collects whole tail gas.Find that after testing isobutene conversion is 80%, C in the product
8Content be 25.34%, C
12Content be 50.43%.
Embodiment two.
With Triethylammonium chloride, Aluminum chloride anhydrous and normal heptane mix, and are warming up to 150 ℃ and keep 6h, make ionic liquid.The 400mL ionic liquid is packed in the reactor, add the 200mL normal hexane, stir with the rotating speed of 13000r/min, temperature is risen to 40 ℃, the rotating speed that adds behind the 50mL iso-butylene again with 13000r/min stirs release after 30 minutes, collects whole tail gas.Find that after testing isobutene conversion is 85%, C in the product
8Content be 22.87%, C
12Content be 51.43%.
Embodiment three.
With Triethylammonium chloride, Aluminum chloride anhydrous and normal heptane mix, and are warming up to 150 ℃ and keep 6h, make ionic liquid.The 400mL ionic liquid is packed in the reactor, add the 200mL normal hexane, stir with the rotating speed of 13000r/min, temperature is risen to 40 ℃, the rotating speed that adds behind the 50mL iso-butylene again with 13000r/min stirs release after 50 minutes, collects whole tail gas.Find that after testing isobutene conversion is 86%, C in the product
8Content be 21.67%, C
12Content be 53.76%.
Embodiment four.
With Triethylammonium chloride, Aluminum chloride anhydrous and normal heptane mix, and are warming up to 150 ℃ and keep 6h, make ionic liquid.The 400mL ionic liquid is packed in the reactor, add the 200mL normal hexane, stir with the rotating speed of 13000r/min, temperature is risen to 40 ℃, the rotating speed that adds behind the 50mL iso-butylene again with 13000r/min stirs release after 60 minutes, collects whole tail gas.Find that after testing isobutene conversion is 86%, C in the product
8Content be 21.51%, C
12Content be 53.91%.
Claims (7)
1. isobutene oligomerisation method is characterized in that comprising ionic liquid is packed in the reactor, adds normal hexane, begins to stir, and heats up, and adds release behind the restir certain hour behind the 50mL iso-butylene, collects whole tail gas.
2. such as right 1 described isobutene oligomerisation method, it is characterized in that the preparation method of described ionic liquid is: with Triethylammonium chloride, Aluminum chloride anhydrous and normal heptane mix, and are warming up to 150 ℃ and keep 6h, get final product.
3. such as right 1 or 2 described isobutene oligomerisation methods, after it is characterized in that beginning stirring temperature is risen to 40 ℃.
4. such as right 1 or 2 described isobutene oligomerisation methods, it is characterized in that normal hexane is 200mL.
5. such as right 1 or 2 described isobutene oligomerisation methods, it is characterized in that adding behind the 50mL iso-butylene restir 10-60 minute.
6. such as right 1 or 2 described isobutene oligomerisation methods, it is characterized in that ionic liquid and alkene volume ratio are 1.2-1.6:1.
7. such as right 1 or 2 described isobutene oligomerisation methods, the stirring velocity after it is characterized in that adding normal hexane and adding the 50mL iso-butylene is 1000-13000r/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210422707 CN102936514A (en) | 2012-10-30 | 2012-10-30 | Method for oligomerizing isobutylene |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210422707 CN102936514A (en) | 2012-10-30 | 2012-10-30 | Method for oligomerizing isobutylene |
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| CN102936514A true CN102936514A (en) | 2013-02-20 |
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| CN 201210422707 Pending CN102936514A (en) | 2012-10-30 | 2012-10-30 | Method for oligomerizing isobutylene |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109433263A (en) * | 2018-12-11 | 2019-03-08 | 中国科学院过程工程研究所 | A kind of method of the ionic liquid-catalyzed isobutene oligomerisation of proton acid type pyridyl group |
-
2012
- 2012-10-30 CN CN 201210422707 patent/CN102936514A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109433263A (en) * | 2018-12-11 | 2019-03-08 | 中国科学院过程工程研究所 | A kind of method of the ionic liquid-catalyzed isobutene oligomerisation of proton acid type pyridyl group |
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Application publication date: 20130220 |