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Al-P-O series catalyst as well as preparation method and application thereof

A catalyst, al-p-o technology, used in chemical instruments and methods, physical/chemical process catalysts, dehydration of hydroxyl-containing compounds to prepare ethers, etc., can solve the problems of low selectivity of o-hydroxyphenethyl ether, etc. High product selectivity and the effect of avoiding aggregation

Pending Publication Date: 2021-12-28
宁夏沪惠科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Al-P-O catalysts are considered to be high-efficiency catalytic systems used in processes, for example, "Application of Al-P-O catalysts in the synthesis of guaiacol" (Zhu Xiaomei et al., October 2002, pages 410-411, Chinese Chemical meeting) discloses the use of aluminum nitrate and phosphoric acid to prepare direct co-precipitation to prepare Al-P-O-based catalysts, but the Al-P-O-based catalysts have the disadvantage of low selectivity for o-hydroxyphenethyl ether

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  • Al-P-O series catalyst as well as preparation method and application thereof
  • Al-P-O series catalyst as well as preparation method and application thereof
  • Al-P-O series catalyst as well as preparation method and application thereof

Examples

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preparation example Construction

[0027] The invention provides a kind of preparation method of Al-P-O series catalyst, comprises the following steps:

[0028] mixing a water-soluble aluminum salt, a water-soluble phosphorus-containing compound, silica microspheres, an organic complexing agent, a pH regulator and water to obtain a mixed solution, aging the mixed solution, drying the solid product obtained by the aging, To obtain a catalyst precursor, the molar ratio of the phosphorus element in the water-soluble phosphorus-containing compound to the aluminum element of the water-soluble aluminum salt is ≤2:1; the pH value of the mixed solution is 5.5-6, and the silicon dioxide micro The ball is amorphous;

[0029] The catalyst precursor is calcined to remove the organic complexing agent to obtain the Al-P-O catalyst.

[0030] In the present invention, unless otherwise specified, the raw materials used are commercially available products well known to those skilled in the art.

[0031] In the present inventio...

Embodiment 1

[0069] Get 42.72g of anhydrous aluminum chloride to prepare 2mol / L aluminum chloride aqueous solution, add 12g of amorphous silicon dioxide microspheres (particle diameter is 5mm) and 8.16g of glucose and continue to stir;

[0070] Dissolve ammonium dihydrogen phosphate in 125mL ammonia water (10wt.%) and keep stirring, wherein the molar ratio of phosphate ion to aluminum ion is 1:1;

[0071] The solutions obtained in the above steps were mixed and continuously stirred, and stood at 80°C for 24 hours to obtain the aged material;

[0072] Heat the aged material at 80°C until the water evaporates to dryness and dry it in a drying oven at 100°C to obtain a solid material;

[0073] The solid material was calcined at 500°C for 6h to obtain an Al-P-O catalyst.

[0074] figure 1 Be the XRD spectrogram of the product obtained in this embodiment, by figure 1 It can be seen that the XRD pattern of the product prepared in this example has no obvious diffraction peak of aluminum-phosph...

Embodiment 2

[0077] Get 42.72g of anhydrous aluminum chloride to prepare 2mol / L aluminum chloride aqueous solution, add 24g of amorphous silicon dioxide microspheres (particle diameter is 5mm) and 8.16g of glucose and continue to stir;

[0078] Dissolve ammonium dihydrogen phosphate in 125mL ammonia water (10wt.%) and keep stirring, wherein the molar ratio of phosphate ion to aluminum ion is 1:1;

[0079] The solutions obtained in the above steps were mixed and continuously stirred, and stood at 80°C for 24 hours to obtain the aged material;

[0080] Heat the aged material at 80°C until the water evaporates to dryness and dry it in a drying oven at 100°C to obtain a solid material;

[0081] The solid material was calcined at 500°C for 6h to obtain an Al-P-O catalyst.

[0082] figure 1 Be the XRD spectrogram of the product obtained in this embodiment, by figure 1 It can be seen that the XRD pattern of the product prepared in this example has no obvious diffraction peak of aluminum-phosph...

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Abstract

The invention relates to the technical field of catalysts, in particular to an Al-P-O series catalyst as well as a preparation method and application thereof. The preparation method provided by the invention comprises the following steps: mixing a water-soluble aluminum salt, a water-soluble phosphorus-containing compound, silicon dioxide microspheres, an organic complexing agent, a pH regulator and water to obtain a mixed solution, aging the mixed solution, and drying a solid product obtained by aging to obtain a catalyst precursor, wherein the molar ratio of phosphorus element to aluminum element in the mixed solution is less than or equal to 2: 1, the pH value of the mixed solution is 5.5-6, and the silicon dioxide microspheres are in an amorphous state; and roasting the solid precursor to remove the organic complexing agent so as to obtain the Al-P-O series catalyst. The Al-P-O series catalyst provided by the invention has the advantages of high catalytic activity, high target product selectivity, high catalytic reaction stability and industrial application prospect.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to an Al-P-O series catalyst and its preparation method and application. Background technique [0002] o-Hydroxyphenethyl ether, also known as ethyl guaiacol, molecular formula C 9 h 12 o 2 , is a transparent colorless to pale yellow liquid. As a fine chemical raw material intermediate, it is widely used in the fields of agriculture, medicine, dyes and spices, and the most widely used is the synthesis of ethyl vanillin. At present, the synthesis methods mainly include homogeneous synthesis and gas phase synthesis. The homogeneous synthesis process has disadvantages such as complicated process, severe corrosion, high toxicity, and environmental pollution. People have carried out research on gas-solid phase catalytic synthesis. [0003] At present, the synthesis of o-hydroxyphenetole by solid-phase O-alkylation of catechol and ethanol gas is a typical green synthesis process. A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/182C07C41/09C07C43/23
CPCB01J27/182C07C41/09C07C43/23
Inventor 邹秀晶徐冬菲汪学广任家安尚兴付丁伟中鲁雄刚魏创林魏伟王凯李健仁
Owner 宁夏沪惠科技有限公司
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