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A kind of preparation method of alkylated gasoline

A technology for alkylating gasoline and alkylated oil, which is applied in the petroleum industry and the production of liquid hydrocarbon mixtures, and can solve problems such as limiting the development of industrialization and irreversible deactivation of catalysts

Active Publication Date: 2021-05-25
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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  • A kind of preparation method of alkylated gasoline
  • A kind of preparation method of alkylated gasoline
  • A kind of preparation method of alkylated gasoline

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1: The synthesis of polyetheramine ionic liquid adopts a one-pot method. First, 20g of polyetheramine D-2000 is dissolved in 30mL of dichloromethane, stirred evenly, and then 2.44g of 1,3-propanesulfonic acid is added dropwise therein Lactone, after the dropwise addition is completed, the temperature rises to 50°C, and the reaction is refluxed for 2 hours. Thereafter, 3.01 g of trifluoromethanesulfonic acid was added dropwise thereto, and the reaction was continued at 50° C. for 4 h, and the reaction was stopped. The solvent dichloromethane was removed by rotary evaporation, and the obtained product was vacuum-dried to obtain the 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: Add 10 mL of polyetheramine ionic liquid and 3 mL of trifluoromethanesulfonic acid into a stainless steel mechanically stirred reaction kettle, seal the kettle, and replace the air in the kettle with 4 MPa high-purity nitrogen for 3 times. Then pump 20mL of a mixed liquid of isobutane and isobutene with an alkane / ene ratio of 10:1, and react with mechanical stirring at 25°C for 20min. quantitative analysis. The conversion rate of isobutene is 99%, the selectivity of C8 products in the alkylate reaches 87%, and the proportion of trimethylpentane accounts for 98%.

[0022] (3) Reuse of catalyst

Embodiment 3-15

[0023] Examples 3-15: using the ionic liquid phase after the first reaction in Example 2 as a catalyst, without adding trifluoromethanesulfonic acid, after separating the alkylate oil, directly seal the kettle, and replace the air in the kettle with nitrogen, Pump in fresh 20 mL of a mixed liquid of isobutane and isobutene with an alkane / ene ratio of 10:1 to carry out the catalytic reaction. The experimental conditions are the same as in Example 2. After repeated use of the ionic liquid phase catalyst in this way, after 13 repeated experiments, the conversion rate of isobutene is still above 95%, and the selectivity of C8 products in the alkylate is still above 84%.

[0024] (4) Catalyst regeneration

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PUM

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Abstract

The invention relates to a new method for catalytically preparing alkylated gasoline. It is characterized in that the double nucleic acid polyether amine ionic liquid is used as a catalyst and trifluoromethanesulfonic acid is used as an additive to catalyze the alkylation reaction of isobutane and isobutene to prepare alkylated gasoline. Polyetheramine ionic liquid can be synthesized by a simple one-step method; the catalytic reaction at normal temperature and pressure is realized, and the catalytic activity is high, and the catalytic selectivity is good; polyetheramine ionic liquid can be recycled efficiently and environmentally friendly. .

Description

technical field [0001] The invention relates to a method for preparing alkylated gasoline, in particular to a method for preparing alkylated gasoline by catalyzing polyetheramine ion liquid. Background technique [0002] Alkylated gasoline is prepared by the alkylation reaction of isobutane and C4 olefins under the catalysis of acid at a certain ratio of alkanes. Its main component is a mixture of C8 isoparaffins, mainly including trimethyl Pentane (TMP) and dimethylhexane (DMH), the more TMP content, the better the antiknock performance of alkylated gasoline. Alkylated gasoline has a series of advantages such as high octane number, low vapor pressure, low aromatic content, and almost no sulfur. This allows alkylated gasoline to be used as an ideal blending component to match gasoline, and then to obtain environmentally friendly gasoline with a high octane number. At present, the global production of alkylated gasoline is 102 million tons per year, but it can only meet abo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G50/00C08G65/00
CPCC08G65/00C10G50/00
Inventor 于凤丽解从霞高旭袁冰于世涛
Owner QINGDAO UNIV OF SCI & TECH
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