Method for synthesizing alkylated oil form isopentane-propylene under catalysis of dual acidic ionic liquid

A technology of ionic liquid and alkylated oil, which is applied in the field of catalysis, can solve the problems of small number of acid active sites, uneven distribution of acid strength, and increased process cost, so as to increase protonation capacity, reduce energy consumption, and save processing cost effect

Inactive Publication Date: 2019-08-23
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, solid acid catalysts mainly include molecular sieves, solid superacids (such as heteropolyacids), etc., but these catalysts often have problems such as uneven distribution of acid strength and small number of acid active sites, resulting in poor reaction performance, and such The catalyst is easily deactivated by carbon deposition in the reaction due to the limitation of the pore structure
[0005] The reaction raw materials used in the traditional synthes

Method used

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  • Method for synthesizing alkylated oil form isopentane-propylene under catalysis of dual acidic ionic liquid
  • Method for synthesizing alkylated oil form isopentane-propylene under catalysis of dual acidic ionic liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Add 40g of isopentane and 6g of 1-sulfopropyl-3-methylimidazolium chloroaluminate bis-acidic ionic liquid catalyst in a 200ml autoclave coated with polytetrafluoroethylene lining, quickly tighten the lid of the kettle, and use N 2 Exhaust the air in the kettle, start the temperature control device, and when the temperature in the kettle is 5°C, use N 2 Punch into the kettle, turn on the stirring device, first stir for 30 minutes to fully mix the catalyst and isopentane, then inject 2g of propylene into the kettle with a micro metering pump, when the reaction pressure is 2MPa, the stirring speed is 1200rpm, and the reaction time is 20min , the mass yield of alkylate (liquid recovery of feed propylene) was 91.5%, and the selectivity of TMPs was 18.4%. After the catalyst was reused 4 times, the mass yield of alkylate was 90.4%, and the selectivity of TMPs was 17.7%.

Embodiment 2

[0023] Add 30g of isopentane and 10g of 1-sulfobutyl-3-methylimidazolium chloride zincate bis-acidic ionic liquid catalyst in a 200ml autoclave with polytetrafluoro-lined lining, quickly tighten the lid of the kettle, and use N 2 Exhaust the air in the kettle, start the temperature control device, and when the temperature in the kettle is 0°C, use N 2 Punch into the kettle, turn on the stirring device, first stir for 30 minutes to fully mix the catalyst and isopentane, then inject 2g of propylene into the kettle with a micro metering pump, when the reaction pressure is 3MPa, the stirring speed is 1000rpm, and the reaction time is 5min , the mass yield of alkylate (liquid recovery of feed propylene) was 86.3%, and the selectivity of TMPs was 18.0%. After the catalyst was reused 6 times, the mass yield of alkylate was 84.7%, and the selectivity of TMPs was 17.2%.

Embodiment 3

[0025] Add 20g isopentane and 4g 1-sulfopropyl group-3-methylimidazolium chlorstannate biacidic ionic liquid catalyst in the autoclave that 200ml is coated with polytetrafluoroethylene liner, tighten still lid rapidly, use N 2 Exhaust the air in the kettle, start the temperature control device, and when the temperature in the kettle is 15°C, use N 2 Punch into the kettle, turn on the stirring device, first stir for 30 minutes to fully mix the catalyst and isopentane, then inject 2g of propylene into the kettle with a micro metering pump, when the reaction pressure is 3MPa, the stirring speed is 600rpm, and the reaction time is 40min , the mass yield of alkylate (liquid recovery of feed propylene) was 80.1%, and the selectivity of TMPs was 15.8%. After the catalyst was reused 5 times, the mass yield of alkylate was 78.8%, and the selectivity of TMPs was 15.3%.

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Abstract

The invention discloses a method for synthesizing alkylated oil form isopentane-propylene under catalysis of a dual acidic ionic liquid. The method is characterized in that isopentane and propylene are used as reaction raw materials, the dual acidic ionic liquid is used as a catalyst, and a high-pressure alkylation method is adopted to synthesize the alkylated oil, wherein the structure general formula of the dual acidic ionic liquid catalyst is as shown in the specification. Compared with the prior art, the catalyst used in the method has Bronsted-Lewis acidity, two types of acid active siteswork synergistically, and thus the catalytic activity is high. The catalyst is immiscible with the reaction raw materials and reaction products, separation is simple, and the catalyst can be reused;and the reaction raw materials used in the method are cheap and easy to obtain, and recovery is simple and convenient, so that the method has important practical application value.

Description

technical field [0001] The invention belongs to the technical field of catalysis, and in particular relates to a method for synthesizing alkylated oil from isopentane-propylene with a double acidic ionic liquid. Background technique [0002] Alkylate oil is a mixture of isoparaffins and low-carbon olefins under the action of an acid catalyst. Its components are mainly saturated hydrocarbons, so the combustion products are clean and have high combustion calorific value. At the same time, alkylate oil has With a series of advantages such as low vapor pressure, low volatility and high octane number, Reid is an ideal gasoline blending component. Trimethylpentanes (TMPs) are an alkane component in alkylate oils with a research octane number (RON) of up to 100. In the production of alkylated gasoline, the selectivity of TMPs is always desired The bigger the better. With the rapid increase of household car ownership, the demand for high-quality gasoline is also increasing. Theref...

Claims

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Application Information

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IPC IPC(8): C10G50/00
CPCC10G50/00C10G2300/1081C10G2300/1092
Inventor 管国锋张国云陈冲冯能杰朱中健万辉
Owner NANJING UNIV OF TECH
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