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Rare earth contained perfluorocarboxylic Lewis acid catalyst and its preparation

A perfluorocarboxylic acid, rare earth metal technology, applied in chemical instruments and methods, physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, etc., can solve the problem of expensive ligands, reduced catalytic activity, etc. problem, to achieve the effect of easy availability of raw materials, low price, and expansion of the scope of application

Inactive Publication Date: 2007-03-07
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] One of the purposes of the present invention is to provide a rare earth metal-containing Lewis acid catalyst that is stable in the air and has a relatively cheap ligand price, so as to overcome the existing sulfonic acid rare earth catalysts that easily absorb moisture in the air—the formation of bands Rare earth salts of sulfonic acid with water of crystallization - thus reducing its catalytic activity and expensive ligands

Method used

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  • Rare earth contained perfluorocarboxylic Lewis acid catalyst and its preparation
  • Rare earth contained perfluorocarboxylic Lewis acid catalyst and its preparation
  • Rare earth contained perfluorocarboxylic Lewis acid catalyst and its preparation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Catalyst [CF 3 (CF 2 ) 6 COO] 3 Preparation of La:

[0021] Perfluorooctanoic acid (2.1g, 0.005mol) and La 2 o 3 (0.26g, 0.00083mol) was added into a 25ml single-port reaction flask, 10ml of deionized water was added with a syringe, heated and stirred, the temperature was raised to boiling, and the condenser was refluxed. Keep warm at 100°C, react for 6-8 hours, stop heating, cool to room temperature to obtain 2.3 g of white spherical solid, wash twice with water, and dry under vacuum to obtain the target product. Yield 100%. IR (KBr) 3400-3500, 1650-1700(s), 1200(s), 1150(s); ICP-ABS: La 3+ (11%);. 19 FNMR: -81((9F), -116(6F), -122.3(6F), -122.7(12F), -123.51(6F).

[0022]

Embodiment 2

[0024] Dissolve lanthanum acetate (0.468g, 0.00167mol) in 5ml of deionized water, add perfluorooctanoic acid (2.1g, 0.005mol), stir for 30min, heat up to 100°C, filter to remove water, and vacuum dry to obtain a white solid with a yield of 99%.

[0025]

Embodiment 3

[0027] Dissolve perfluorooctanoic acid (2.1g, 0.005mol) in 10ml of water first, then add anhydrous LaCl 3 (0.4g, 0.0017mol) or LaCl 3 ·6H 2 O (1.7g, 0.0017mol) was heated to 120°C, stirred vigorously for 19h, filtered to remove water, washed with deionized water several times, and then dried to obtain a white solid with a yield of about 80%.

[0028]

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Abstract

A RE metal contained perfluorocarboxylic acid-Lewis acid catalyst suitable for FBC technique and the catalyzing in organic phase is prepared through the reaction between RE metal oxide, acetate, carboxyl compound, halide sulfate or nitrate and perfluorocarboxylic acid. Its advantages are high stability in air, high catalytic activity and easy recovery.

Description

technical field [0001] The invention relates to a Lewis acid catalyst and a preparation method thereof, in particular to a rare earth metal-containing Lewis acid (Lewis acid) catalyst and a preparation method thereof. Background technique [0002] Traditional Lewis acid (Lewis acid) catalysts have low catalytic efficiency, generally pollute the environment and endanger the living environment of human beings. Therefore, the chemical industry is currently seeking environmentally friendly chemical reaction processes, which mainly include the use of environmentally friendly reagents. And solvent, use the reagent with good reactivity and the catalyst with high catalytic efficiency to ensure the high yield and high selectivity of the product. [0003] Due to the strong electron-withdrawing property of the fluorine atom, the high-fluorine hydrocarbon acid has a strong Lewis acidity. Since 1987, Forsberg reported the trifluoromethanesulfonic acid rare earth metal salt [Ln(OTf) 3 ] ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/04B01J31/26
Inventor 王利民韩建伟樊兆玉田禾盛佳
Owner EAST CHINA UNIV OF SCI & TECH
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