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a kind of sio 2 -c-al 2 o 3 Carrier and preparation method and application

A sio2-c-al2o3 and carrier technology, which is applied in the field of SiO2-C-Al2O3 carrier and its preparation, can solve the problems of complex preparation process and difficult control of conditions, and achieves the effects of good selectivity, reduced interaction and promotion of reduction

Active Publication Date: 2019-09-10
SHANXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation process is relatively complicated, and many conditions are difficult to control during the catalyst scale-up process.

Method used

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  • a kind of sio <sub>2</sub> -c-al <sub>2</sub> o <sub>3</sub> Carrier and preparation method and application
  • a kind of sio <sub>2</sub> -c-al <sub>2</sub> o <sub>3</sub> Carrier and preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Take by weighing 154g pseudo-boehmite powder (Al 2 o 3 Dry basis is 100g), for subsequent use; Weigh 2.56g methyl orthosilicate (containing SiO 2 Weight 1g), and 0.02g sucrose, are dissolved in the ethanol of 40g, obtain the solution containing silicon and organic carbon source; Take organic acid formic acid and inorganic acid nitric acid to make mixed acid by volume ratio 1:0.4, get 0.5g of this mixed acid acid, add 10g of deionized water to dilute to obtain a dilute acid solution; mix the above solution containing silicon and organic carbon sources with the dilute acid solution, stir at 30°C for 3h, and add it to pseudoboehmite powder by spraying , kneaded for 15 minutes; weighed 1g of the extrusion aid Sinensis powder and added it to the kneaded pseudo-boehmite powder, stirred evenly, extruded into a cylindrical shape on a molding machine, with a particle diameter of 1mm, and dried at a temperature of 70°C for 2 hours ; The resulting material is in H 2 5% H by vol...

Embodiment 2

[0040] Take by weighing 154g pseudo-boehmite powder (Al 2 o 3 Dry basis is 100g), for subsequent use; Weigh 20.51g methyl orthosilicate (containing SiO 2 Weight 8g), and the glucose of 10g, be dissolved in the propanol of 60g, obtain the solution containing silicon and organic carbon source; Get organic acid citric acid and inorganic hydrochloric acid to make mixed acid by volume ratio 1:1.1, 3g of this Mix the acid, add 30g of deionized water to dilute to obtain a dilute acid solution; mix the above silicon-containing and organic carbon source solution with the dilute acid solution, stir at 50°C for 0.5h, and add it to the pseudoboehmite powder by spraying , kneading for 60 minutes; weigh 7g of extrusion aid starch and add it to the kneaded pseudo-boehmite powder, stir evenly, extrude into a clover shape on a molding machine, with a particle diameter of 3.5mm, and dry at a temperature of 200°C for 15 hours ; The resulting material is in H 2 55% H by volume 2 / N 2 Mixed a...

Embodiment 3

[0044] Take by weighing 154g pseudo-boehmite powder (Al 2 o 3 Dry basis is 100g), for subsequent use; Weigh 16.07g ethyl orthosilicate (containing SiO 2 Weight 4.5g), and polyethylene glycol of 5.6g, be dissolved in the butanol of 50g, obtain the solution that contains silicon and organic carbon source; Get organic acid glacial acetic acid and inorganic acid sulfuric acid to mix by volume ratio 1:0.9 Acid, 0.8g of the mixed acid, diluted with 20g of deionized water to obtain a dilute acid solution; mix the above silicon-containing and organic carbon source solution with the dilute acid solution, stir at 40°C for 2h, and add it to the proposed solution by spraying In the boehmite powder, knead for 20min; weigh 3g of extrusion aid cellulose and add it to the above kneaded pseudo-boehmite powder, stir evenly, extrude on the molding machine, four-leaf clover shape, particle diameter of 2mm, Dry at a temperature of 110°C for 3h; the resulting material is 2 30% H by volume 2 / N ...

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Abstract

A kind of SiO 2 ‑C‑Al 2 O 3 carrier, whose composition is SiO 2 :C:Al 2 O 2 The mass ratio is 1~8:0.01~5:100; the pore volume is 0.5mL / g~1.1mL / g, and the specific surface area is 180m 2 / g~270m 2 / g, the average pore diameter is 5nm~13nm, and the L acid content is 0.2mmol / g~0.7mmol / g. The invention has the advantages of good thermal stability, high mechanical strength, suitable surface acid-base properties and simple preparation.

Description

technical field [0001] The invention belongs to a carrier and a preparation method, in particular to a SiO 2 -C-Al 2 o 3 Carrier and its preparation method and application. Background technique [0002] Based on its unique structure, texture characteristics, adjustable surface properties, good thermal stability, mechanical properties and other advantages, alumina is often used as a supported catalyst carrier, involving hydrogenation, dehydrogenation, cracking, alkylation, etc. Numerous fields of catalysis. [0003] Alkyne aldehyde synthesis of 1,4-butanediol hydrogenation catalyst generally chooses supported nickel catalyst with alumina as the carrier. CN1081174A has reported Ni-Al prepared by co-precipitation 2 o 3 catalyst. US 3950441 and US 3759845 reported the use of γ-Al 2 o 3 Supported Ni-Cu-Mn catalyst as carrier. Among the reported catalysts, catalysts prepared by co-precipitation tend to have higher content of active components and poor atom economy; or st...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/18B01J23/755C07C29/17C07C31/18
CPCC07C29/172B01J21/18B01J23/002B01J23/755B01J35/615B01J35/638B01J35/635B01J35/647C07C31/207
Inventor 赵永祥李海涛孙自瑾赵丽丽张鸿喜
Owner SHANXI UNIV
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