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Method for on-line producing alkymer from regenerative ionic liquid catalyst

A technology for ionic liquids and alkylated oils, applied in chemical instruments and methods, liquid hydrocarbon mixture production, physical/chemical process catalysts, etc., to achieve the effects of prolonging catalyst life, reducing corrosion, and maintaining selectivity

Inactive Publication Date: 2008-08-06
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the method of using ionic liquid catalyst for online continuous regeneration in the production of alkylate has not been reported

Method used

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  • Method for on-line producing alkymer from regenerative ionic liquid catalyst
  • Method for on-line producing alkymer from regenerative ionic liquid catalyst
  • Method for on-line producing alkymer from regenerative ionic liquid catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Preparation of ionic liquid catalyst

[0023] Slowly add aluminum trichloride to triethylamine hydrochloride at a molar ratio of 2:1, use n-heptane as a solvent, protect with dry nitrogen, stir at room temperature for 30 minutes, then heat up to 80°C, and continue stirring for 2 hours . After cooling, the reactant is divided into two phases, the upper layer is heptane, and the lower layer is composed of [Et 3 h + ][Al 2 Cl 7 - ] of ionic liquids. Add the fresh ionic liquid prepared in the ionic liquid tank, and add the modification auxiliary toluene, so that the mass concentration of toluene is 2000ppm.

[0024] Alkylation reaction on continuous plant

[0025] The alkylation reaction of isobutane / 2-butene is carried out on a continuous device, the molar ratio of isobutane / 2-butene in the raw material is 20:1, and the material leaves the reactor and enters the liquid-liquid separator through the A road . The pressure of the reaction system is controlled to be 0....

Embodiment 2

[0036] Under the conditions of Example 1, when the accumulative amount of fresh raw material treated per liter of ionic liquid reached 300 liters, the activity of the ionic liquid catalyst decreased significantly. At this time, the aluminum trichloride crystal is used as the source of aluminum supplementation, and the operating temperature of the regenerator is 30°C. Regenerates continuously for one hour. Inject reaction raw material in reaction system then, operating condition is the same as embodiment 1. The reactor outlet product was collected and analyzed for its composition. The results are shown in Table 3. It can be seen that the inactivated ionic liquid recovers the reactivity, and the selectivity of the target product remains unchanged.

[0037]Table 3. Alkylation reaction of isobutane / 2-butene catalyzed by ionic liquid regenerated by aluminum trichloride

[0038]

Embodiment 3

[0039] Embodiment 3: the continuous regeneration reaction of ionic liquid

[0040] The fresh ionic liquid prepared in Example 1 was added to the ionic liquid tank, and the alkylation reaction of isobutane / butene was carried out on a continuous device. After the material leaves the reactor, it enters the liquid-liquid separator through the B channel. The pressure of the reaction system is controlled at 1.0 MPa, the molar ratio of isobutane / 2-butene in the raw material is 50:1, the reaction temperature is 25° C., and the ratio of the circulating flow rate of the reactant to the ionic liquid is 10:1. Aluminum flakes are filled in the regenerator as the source of aluminum supplementation, and the operating temperature of the regenerator is 40°C. The reactor outlet product was collected and analyzed for its composition. The results are shown in Table 4. When the accumulative amount of fresh raw material treated per liter of ionic liquid reaches 600 liters, the ionic liquid is sti...

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Abstract

The invention relates to a method for producing alkylate finish, in particular to a method by which alkylate finish can be produced with an online continuously regenerated ionic liquid catalyst. Metal aluminum or aluminum trichloride is used as the aluminum resource for replenishing AlCl3 lost due to oil-phase entrainment or decomposition of ironic liquid when meeting water, thereby realizing continuous aluminum replenishment to prolong the service life of the catalyst, so the method is applicable to raw materials with relatively high water content. At the same time, the method can reduce the amount of HCl in the catalytic reaction system, maintaining the selectivity of the target production, isooctane, at a high level in the product and reducing corrosion of existent HCl.

Description

Technical field: [0001] The invention relates to a method for producing an alkylation oil, in particular to a method for producing an alkylation oil that can continuously regenerate an ionic liquid catalyst on-line. Background technique: [0002] With the rapid development of the automobile industry and the increasing emphasis on environmental protection, the demand for unleaded high-octane gasoline is increasing all over the world, and the content of aromatics and olefins in gasoline will also be limited. In this case, adding alkylating oil to gasoline is an effective method to maintain high octane number and low vapor pressure of gasoline. [0003] As we all know, the catalysts currently used in the alkylation of alkanes and olefins in industry are mainly liquid strong acids such as concentrated sulfuric acid or hydrofluoric acid. However, these liquid strong acids have problems such as strong corrosiveness, difficult production operations, troublesome post-processing of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C2/58C10G50/00B01J31/02
CPCY02P20/584
Inventor 陈标华张傑黄崇品乔聪震
Owner BEIJING UNIV OF CHEM TECH
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