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Light alkane isomerized ionic liquid catalyst and preparation method thereof

An ionic liquid, light alkane technology, applied in physical/chemical process catalysts, chemical instruments and methods, organic compound/hydride/coordination complex catalysts, etc., can solve the problem of low isomer selectivity, etc. The effect of improving selectivity and liquid yield, increasing octane number, and suppressing side reactions

Active Publication Date: 2017-07-21
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The present invention solves the problem that the isomer selectivity of raw material alkane in the ionic liquid catalyst used for alkane isomerization in the prior art is not high, and further provides an ionic liquid catalyst with product distribution optimization function

Method used

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  • Light alkane isomerized ionic liquid catalyst and preparation method thereof
  • Light alkane isomerized ionic liquid catalyst and preparation method thereof
  • Light alkane isomerized ionic liquid catalyst and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1-1

[0036] A kind of preparation method of light alkane isomerization ionic liquid catalyst with product distribution optimization function described in this embodiment comprises the following steps:

[0037] (1) Accurately weigh 17.10 g of triethylamine hydrochloride (Triethylamine Hydrochloride) in a 250 mL three-neck flask, add 50 mL of absolute ethanol and stir to dissolve, add 13.77 g of 1,3-propanesulfonate dropwise under a protective atmosphere Acid lactone (1,3-Propanesultone), after stirring evenly, raise the system temperature to 80 o C reflux reaction for 12 hours, remove the solvent ethanol by rotary evaporation, and then separate the unreacted raw materials and products by centrifugation to obtain the quaternary ammonium chloride ionic liquid intermediate with sulfonate [HO 3 SC 3 NET 3 ] Cl.

[0038] (2) Accurately weigh 4.50 g of the quaternary ammonium chloride ionic liquid intermediate [HO 3 SC 3 NET 3 ]Cl in a 100 mL three-neck flask, under a protective atm...

Embodiment 1-2

[0043] A kind of preparation method of light alkane isomerization ionic liquid catalyst with product distribution optimization function described in this embodiment comprises the following steps:

[0044] (1) Accurately weigh 17.10 g of triethylamine hydrochloride (Triethylamine Hydrochloride) in a 250 mL three-neck flask, add 50 mL of anhydrous methanol to fully stir to dissolve, and add 13.77 g of 1,3-propanesulfonate dropwise under a protective atmosphere Acid lactone (1,3-Propanesultone), after stirring evenly, raise the system temperature to 90 o C was refluxed for 8 hours, and the solvent methanol was removed by rotary evaporation, and then the unreacted raw material was separated from the product by centrifugation to obtain the quaternary ammonium chloride ionic liquid intermediate with sulfonate [HO 3 SC 3 NET 3 ] Cl.

[0045] (2) Accurately weigh 4.50 g of the quaternary ammonium chloride ionic liquid intermediate [HO 3 SC 3 NET 3 ]Cl in a 100 mL three-neck flas...

Embodiment 2-1

[0047] The ionic liquid catalyst described in Example 1-1 is used to catalyze the isomerization reaction of light alkanes, specifically comprising the following steps:

[0048] (1) Weigh the ionic liquid according to the mass ratio of ionic liquid catalyst A and n-hexane 1:1 (based on the mass of 10 mL n-hexane).

[0049] (2) Control the initial nitrogen pressure of the autoclave to be 1 MPa, the stirring speed is controlled at 1000 rpm, and the reaction temperature is controlled at 50 o C, reacted for 12 h.

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Abstract

The invention discloses a light alkane isomerized ionic liquid catalyst with a product distribution optimization function, and particularly relates to a preparation method of the Br-nsted-Lewis bi-acidity ionic liquid catalyst for catalyzing light alkane isomerization. Quaternary ammonium salt halide ionic liquid with kations partially containing sulfonate functional groups serves as a precursor to react with AlCl3 to form the ionic liquid catalyst with Br-nsted-Lewis bi-acidity performance. Compared with public ionic liquid catalysts for catalyzing light alkane isomerization, the catalyst prepared according to the method has the advantages of high hexane isomer selectivity, double-branch hexane isomer selectivity and liquid yield, so that the ionic liquid catalyst has better isomerization performance. In addition, the method has the advantages of simple process, simplicity and convenience in operation, low cost, good economic benefit and good industrialization potential.

Description

technical field [0001] The present invention relates to a preparation method of a light alkane isomerization ionic liquid catalyst with product distribution optimization function, in particular to a preparation method for catalyzing light alkane isomerization and having a Brönsted-Lewis double acidic ionic liquid catalyst , belonging to the field of petrochemical industry. Background technique [0002] Due to the current heightened restrictions on toxic aromatics in motor fuels, refiners have significantly increased their need for processes that can increase the octane of non-aromatic oils. Isomerization of light alkanes is an important method for refineries to increase the octane number of gasoline light fractions. The octane number represents the ability of the oil burned in the engine cylinders to resist knocking. With the prohibition of tetraethyl lead (TEL) additive in gasoline, light alkane isomerization technology has been developed rapidly. This ingredient has mos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/02C10G45/60
CPCB01J31/0285C10G45/60C10G2300/1037C10G2300/305C10G2300/70C10G2400/02
Inventor 白正帅鲍晓军马骏驰岳源源袁珮朱海波林性贻
Owner FUZHOU UNIV
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