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Method for preparing alkylation gasoline

A technology for alkylating gasoline and alkylating oil, which is applied in the petroleum industry and the production of liquid hydrocarbon mixtures. It can solve the problems of irreversible deactivation of catalysts and limit the development of industrialization, achieve good solubilization, realize industrial production, and catalyze The effect of superior performance

Active Publication Date: 2019-08-02
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The metal chloride type Lewis acidic ionic liquid catalyst has been studied more. Although this type of catalyst is used in the alkylation reaction to obtain a good catalytic effect, it is sensitive to water and easily causes the irreversible deactivation of the catalyst, so it is limited. its industrial development

Method used

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  • Method for preparing alkylation gasoline
  • Method for preparing alkylation gasoline

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1: Synthesis of polyetheramine ionic liquid A one-pot method was used. First, 20 g of polyetheramine D-2000 was dissolved in 30 mL of dichloromethane, stirred evenly, and then 2.44 g of 1,3-propanesulfonic acid was added dropwise to it. The lactone was added dropwise, the temperature was raised to 50°C, and the reaction was condensed and refluxed for 2h. After that, 3.01 g of trifluoromethanesulfonic acid was added dropwise thereto, and the reaction was continued at 50° C. for 4 h to stop the reaction. The solvent dichloromethane is removed by rotary evaporation, and the obtained product is vacuum-dried to obtain a polyetheramine ionic liquid catalyst. The synthetic route of polyetheramine ionic liquid is as follows:

[0019]

[0020] (2) Preparation of alkylated gasoline

Embodiment 2

[0021] Example 2: In a stainless steel mechanically stirred reaction kettle, 10 mL of polyetheramine ionic liquid and 3 mL of trifluoromethanesulfonic acid were added, the kettle was sealed, and the air in the kettle was replaced with 4 MPa high-purity nitrogen for 3 times. Then pump 20 mL of a mixed liquid of isobutane and isobutene with an alkane / ene ratio of 10:1, and mechanically stir the reaction at 25 ° C for 20 min. After the reaction is completed, open the kettle to collect the upper alkylated oil phase, and carry out a gas chromatography. Quantitative analysis. The conversion rate of isobutene is 99%, and the selectivity of C8 products in the alkylate oil reaches 87%, of which the proportion of trimethylpentane accounts for 98%.

[0022] (3) Reuse of catalyst

Embodiment 3-15

[0023] Example 3-15: The ionic liquid phase after catalyzing the primary reaction in Example 2 was used as a catalyst, without adding trifluoromethanesulfonic acid. A fresh 20 mL mixture of isobutane and isobutene with an alkane / ene ratio of 10:1 was pumped to carry out the catalytic reaction, and the experimental conditions were the same as those in Example 2. After 13 repeated experiments using the ionic liquid catalyst, the conversion of isobutene is still above 95%, and the selectivity of C8 products in the alkylate is still above 84%.

[0024] (4) Regeneration of catalyst

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PUM

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Abstract

The invention relates to a novel method for catalytic preparation of alkylation gasoline. The method is characterized in that a dicaryon acid polyether amine ionic liquid is adopted as a catalyst, trifluoromethanesulfonic acid is adopted as an additive, and an alkylation reaction of iso-butane and isobutene is catalyzed to prepare the alkylation gasoline. The polyether amine ionic liquid can be synthesized by using a simple one-step method, a catalysis reaction at a normal temperature and normal pressure is achieved, in addition, the catalysis activity is high, and the catalysis selectivity isgood; and the polyether amine ionic liquid can be efficiently circulated, is environmental-friendly and can be regenerated and recycled.

Description

technical field [0001] The invention relates to a method for preparing alkylated gasoline, in particular to a method for preparing alkylated gasoline catalyzed by a polyetheramine ionic liquid. Background technique [0002] Alkylated gasoline is prepared by the alkylation reaction of isobutane and C4 olefins at a certain alkene ratio under the catalysis of acid. Its main component is a mixture of C8 isoparaffins, mainly including trimethyl Pentane (TMP) and dimethyl hexane (DMH), the higher the content of TMP, the better the antiknock performance of alkylated gasoline. Alkylated gasoline has a series of advantages such as high octane number, low vapor pressure, low aromatics content, and almost no sulfur. This makes alkylated gasoline an ideal blending component with gasoline, resulting in environmentally friendly gasoline with a high octane rating. At present, the global production of alkylated gasoline is 102 million tons per year, but it can only meet about 10% of the g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G50/00C08G65/00
CPCC10G50/00C08G65/00
Inventor 于凤丽解从霞高旭袁冰于世涛
Owner QINGDAO UNIV OF SCI & TECH
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