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a kind of sio 2 -al 2 o 3 Preparation method of composite carrier

A technology of composite carrier and mixed solution, applied in catalyst carriers, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of catalyst activity decline, catalyst surface texture damage, loss of active components, etc.

Active Publication Date: 2016-12-28
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This will lead to the loss of active components, and even the destruction of the surface texture of the catalyst, which will reduce the activity of the catalyst and limit the Ni 2 Application of P catalyst in industry

Method used

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  • a kind of sio <sub>2</sub> -al <sub>2</sub> o <sub>3</sub> Preparation method of composite carrier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Weigh 30g of pseudo-boehmite and 100g of water, and beat at room temperature for 3h.

[0017] Prepare the following solution:

[0018] Orthoethyl silicate (TEOS): absolute ethanol: deionized water: concentrated nitric acid = 1:9:2:0.3 (molar ratio) Beaker A: 12.5ml orthoethyl silicate (TEOS) + 15ml absolute ethanol ( The order of writing is the order of addition) Beaker B; 15ml of absolute ethanol + 2ml of deionized water + 1ml of concentrated nitric acid (the order of writing is the order of addition) (the absolute ethanol in beaker A and beaker B are both the required total amount of ethanol half)

[0019] Add the solution in beaker B dropwise to beaker A at a rate of 20ml / min to form a sol, and immediately pour the prepared sol into the beating solution of pseudo-boehmite, stir rapidly for 60min, take it out and put it on a clean watch glass 24h in the air, dried in an oven at 120°C for 3h, and baked in a muffle furnace at 500°C for 4h to obtain a composite carrier...

Embodiment 2

[0023] Only change the composition of the beating liquid, and replace the pseudo-boehmite with γ-Al 2 o 3 , 30g γ-Al 2 o 3 Mix with 100g of water and beat for 3h, the rest of the process is the same as the preparation process of catalyst A, SiO in the composite carrier 2 The mass fraction accounts for 10% of the composite carrier mass fraction, and the preparation of Ni 2 Catalyst Ni with 20% P loading 2 P / SiO 2 -10-γ-Al 2 o 3 , denoted as D.

Embodiment 3

[0025] Change nitric acid into ammonia water, and the rest of the process is the same as the preparation process of catalyst A, and the SiO in the composite carrier 2 The mass fraction accounts for 10% of the composite carrier mass fraction, and the preparation of Ni 2 Catalyst Ni with 20% P loading 2 P / SiO 2 -10-Al 2 o 3 , denoted as E.

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Abstract

The present invention relates to a SiO 2 ‑Al 2 o 3 The preparation method of the composite carrier; the pseudo-thin water aluminum is put into deionized water, the mixed solution of tetraethyl orthosilicate and absolute ethanol is recorded as A, the mixed solution of absolute ethanol, deionized water, and concentrated nitric acid is recorded as B, and Solution B is added dropwise to solution A to form a sol, which is poured into the beating liquid of pseudo-boehmite to obtain a composite carrier SiO 2 ‑Al 2 o 3 ; Absolute ethanol: deionized water: concentrated nitric acid molar ratio 1:9:2:0.3; mass ratio of pseudo-both aluminum and deionized water 1:3‑1:4; SiO in the composite carrier 2 The load mass is 5‑20%; the Ni 2 P load to SiO 2 ‑Al 2 o 3 Composite support, both capable of reflecting SiO 2 high activity, and can make full use of Al 2 o 3 The properties of large specific surface and high mechanical strength have the highest conversion rate of hydrodesulfurization to the model compound DBT.

Description

technical field [0001] The invention relates to a kind of SiO suitable for the industrial hydrodesulfurization reaction of transition metal phosphides 2 -Al 2 o 3 Composite carrier. Background technique [0002] Ni 2 P especially SiO 2 Loaded Ni 2 P catalyst has excellent hydrodesulfurization activity. However, the carrier of oil desulfurization catalyst commonly used in industrial production is γ-Al with large pore volume. 2 o 3 . if you 2 P catalyst with γ-Al 2 o 3 as a carrier, then during the preparation process Ni 2 P easily reacts with γ-Al 2 o 3 The surface of the support generates AlPO due to the strong interaction 4 . This will lead to the loss of active components, and even the destruction of the surface texture of the catalyst, which will reduce the activity of the catalyst and limit the Ni 2 Application of P catalyst in industry. Preparation of large pore volume γ-Al by sol-gel method and other methods 2 o 3 loaded SiO 2 nanocomposite carrier...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J32/00B01J21/12B01J27/185
Inventor 葛少辉孔静张明慧侯远东兰玲刘坤红鞠雅娜王书芹吴平易金辰王鹏朴佳锐高卓然胡亚琼
Owner PETROCHINA CO LTD
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