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A kind of method that adamantyl ionic liquid promotes the catalytic production of alkylated gasoline

A technology for alkylating gasoline and ionic liquids, applied in chemical instruments and methods, liquid hydrocarbon mixture production, physical/chemical process catalysts, etc., can solve inconspicuous problems, improve selectivity, suppress side reactions, and recycle The effect of the number of times up

Active Publication Date: 2018-09-07
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, the development of imidazole ionic liquids containing fluorine anions as new synergistic catalysts or catalysts for alkylation reactions has made great progress in recent years (US5750455, US7285698, ZL201110038062), which improved the selectivity of the main product TMP, but not significantly
At present, there are no reports on ionic liquid additives or synergistic catalysts with multiple functions at the same time

Method used

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  • A kind of method that adamantyl ionic liquid promotes the catalytic production of alkylated gasoline
  • A kind of method that adamantyl ionic liquid promotes the catalytic production of alkylated gasoline
  • A kind of method that adamantyl ionic liquid promotes the catalytic production of alkylated gasoline

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preparation example Construction

[0028] The method for preparing alkylated oil provided by the present invention is to contact and react isoparaffins and olefins in the presence of a catalyst under alkylation conditions to produce polyalkylene oil with isooctane (especially trimethylpentane) as the main component. branched chain hydrocarbons. A small amount of adamantyl ionic liquid with the functions of increasing the transfer speed of hydride ions, improving the performance of the acid / hydrocarbon two-phase interface, and maintaining the acidity of the system is added to the main catalyst.

[0029] In the present invention, unless otherwise specified, all percentages are in weight units, and all equipment and raw materials can be purchased from the market or commonly used in this industry. The methods in the following examples, unless otherwise specified, are conventional methods in the art.

Embodiment 1

[0032] Preparation of N,N,N-Dimethylbutylammonium Bistrifluoromethanesulfonimide Ionic Liquid (ADM-IL 01)

[0033] The preparation of N,N,N-dimethylbutylammonium bistrifluoromethanesulfonimide ionic liquid is completed through the following three steps.

[0034] 1) Synthesis of N,N-dimethylamantadine: Take 0.1 mol of amantadine in a three-necked flask, add 100 mL of isopropanol, stir and heat to 35°C. Then, 0.5 mol formic acid was slowly added dropwise with a constant pressure dropping funnel (the dropwise addition was completed in 40 minutes), and the mixture was heated to 50°C. Take 0.2mol formaldehyde and add it under strong stirring with a constant pressure dropping funnel (4.5h dropwise). The mixture was heated to 80 °C and maintained at reflux for 21 h. After cooling, alkalinize with NaOH solution until pH = 13, the solution is separated, the upper layer is extracted with n-hexane, and the solvent is evaporated using a rotary evaporator with a maximum rotary evaporatio...

Embodiment 2

[0038] Preparation of N,N,N-Dimethyldodecyladamantanium Bistrifluoromethanesulfonimide Ionic Liquid (ADM-IL 02)

[0039] The operation steps are as in Example 1. First, N,N-dimethylamantadine is synthesized by reacting amantadine with formic acid and formaldehyde, and then N,N-dimethylamantadine is reacted with the same molar amount of dodecane bromide to synthesize N,N,N-Dimethyldodecyladamantanium bromide, lastly N,N,N-Dimethyloctyladamantanium bromide and LiNTf 2 The ion exchange reaction completes the preparation of N,N,N-dimethyl dodecyl adamantyl ammonium bistrifluoromethanesulfonimide ionic liquid.

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Abstract

The invention relates to a production method of alkylation gasoline. According to the method, an adamantyl ion liquid modified strong acid is used as a catalyst, and low-carbon olefin and isobutane or isopentane are catalyzed to be subjected to direct addition, so as to generate highly branched isoparaffin. Cations of adamantyl ion liquid have a structure shown as the description, wherein R1, R2, R3, R4, R5 an R6 are the same or different C1 to C30 alkyl, and n is an integer from 0 to 8; anions of the adamantyl ion liquid comprise at least one of HSO4<->, CF3SO3<->, NTf<2->, H2PO4<->, PW12O40<3->, p-CH3-(C6H4)SO3<->, PMo12O40<3->, H2PW12O40<->, PF6<->, SBF6<-> and [B(HSO4)4]<->. According to the method for alkylating with the assistant catalysis of the adamantyl ion liquid, provided by the invention, the service life of the catalyst can be remarkably prolonged, and the selectivity and yield of a target product (trimethylpentane) are improved. The method has simple conditions and is simple and easy to operate, and industrialized popularization and application are facilitated.

Description

technical field [0001] The invention relates to a method for producing alkylated gasoline, in particular to a method for catalytically producing alkylated gasoline with adamantyl ionic liquid. Background technique [0002] With the rapid development of the automobile industry and the stricter fuel regulations, the demand for high-quality gasoline and diesel has also increased sharply in recent years. Using high-quality gasoline and diesel can improve fuel efficiency and reduce SO 2 The emission of air pollutants such as , CO, and olefins is one of the important measures to achieve energy conservation and emission reduction in the fuel industry, and to control air pollution and smog. In the "Action Plan for the Prevention and Control of Air Pollution" issued by the State Council in 2013, the table for accelerating the quality upgrade of oil products nationwide was specified. Adding clean, high-quality, high-octane gasoline blending components to the fuel can improve the ove...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G50/00B01J31/02B01J31/26
CPCB01J31/0285B01J31/26C10G50/00C10G2300/305C10G2400/02
Inventor 赵国英王留阳张锁江王傲运张海涛
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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