Synthesis and application of rare earth layered thermocatalytic material

A technology of thermal catalysis and rare earth hydrate, which is applied in the preparation/treatment of rare earth metal compounds, rare earth metal sulfate, catalyst activation/preparation, etc., and can solve the problems of large demand for aromatic compounds and large consumption of fossil energy

Active Publication Date: 2021-04-30
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to provide the synthesis and application of a rare earth layered thermocatalytic material to solve the problem that the demand for aromatic compounds is large in the world today, but the traditional synthesis needs to consume a large amount of non-renewable fossil energy

Method used

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  • Synthesis and application of rare earth layered thermocatalytic material
  • Synthesis and application of rare earth layered thermocatalytic material
  • Synthesis and application of rare earth layered thermocatalytic material

Examples

Experimental program
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Effect test

Embodiment 1

[0040] 1) the CeCl 3 ·7H 2 O and (NH 4 ) 2 SO 4 Dissolve equimolar amounts in deionized water (the ratio of rare earth hydrate to water is 0.08-0.17 mmol·mL -1 ), then transfer the resulting solution to a polytetrafluoroethylene liner, add triethylamine dropwise to the solution with a pipette gun to adjust the pH of the solution, and stir at room temperature to obtain a uniform mixture, control the solution pH=7-11, preferably pH=7.

[0041] 2) Put the reaction kettle with the above mixed solution in an oven, react at a constant temperature at 80 °C for 3 h, cool to room temperature naturally, and filter to obtain a solid product;

[0042] 3) Wash the above solid product with water and ethanol several times, put the obtained solid in an oven, keep it at 40 ℃ for several hours (5-9 hours), and dry the sample to obtain a white solid powder.

[0043] Product marked as RE x (OH) y (SO 4 ) z ·nH 2 O, preferably, x=1, y=1, z=1, n=0-3, ie RE(OH)SO 4 ·nH 2 O, x=1, y=1, z=...

Embodiment 2

[0053] Carry out according to the mode of embodiment 1, difference is, in step 1), will add triethylamine and add ammonia water instead.

Embodiment 3

[0055] Proceed in the same manner as in Example 1, except that the reaction temperature in step 2) is 85°C.

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Abstract

The invention relates to synthesis and application of a rare earth layered thermocatalytic material, wherein the chemical formula of the rare earth rare earth layered thermocatalytic material is REx(OH)y(SO4)z.nH2O, RE represents rare earth elements, and x, y and z can be integers or fractions. According to the invention, the rare earth layered material has excellent stability and Lewis acidity; alcohol, aldehyde and phenol aromatic compounds are synthesized in one step from ethanol; the rare earth layered thermocatalytic material provided by the invention has excellent thermocatalytic performance, wherein the conversion rate of ethanol is close to 100%, the yield of an aldol condensation product reaches 52%, and the selectivity of aromatic compounds in the aldol condensation product is about 80%; and the ethanol involved in the process can be obtained by biomass fermentation, fossil energy consumption can be avoided, the reaction conditions are mild, and the yield of the target product is relatively high.

Description

technical field [0001] The invention relates to the synthesis and application of a rare-earth layered thermocatalytic material, specifically the application in the preparation of aromatic compounds starting from ethanol, that is, one-step synthesis of a class of aromatic compounds starting from ethanol. Background technique [0002] Scandium Sc, yttrium Y and lanthanides (lanthanum La, cerium Ce, praseodymium Pr, neodymium Nd, promethium Pm, samarium Sm, europium Eu, gadolinium Gd, terbium Tb, dysprosium Dy, holmium Ho, bait Er, thulium Tm, ytterbium Yb, lutetium and Lu) constitute rare earth elements. The unique layer structure of rare-earth layered materials endows them with excellent structural stability and unique Lewis acidic sites, thus enabling them to be widely used in the field of catalysis. [0003] Phenol and substituted phenols are important platform molecules that can be used as intermediates in the synthesis of pesticides, disinfectants, antioxidants, and plas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/053B01J37/10C07C37/00C07C39/07C01F17/282C01F17/10
CPCB01J27/053B01J37/10C07C37/00C01F17/282C01F17/10C01P2002/20C07C39/07Y02E60/36
Inventor 张洪波郭金秋杜亚平
Owner NANKAI UNIV
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