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

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...

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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 synthesis of alkylated oil are isobutane and butene. Since the isobutane is often excessive during the reaction process, and the excess isobutane needs to be recovered by cryogenics (below minus 25°C), Therefore, the energy consumption is large, and my country's C 4 The production of hydrocarbons also presents a situation of insufficient supply, so the process cost also increases accordingly, which is of great significance for the research of new alkylate synthesis process

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