Method for preparing modified MCM-41/aluminium oxide composite carrier

A technology of MCM-41 and composite carrier, which is applied in chemical instruments and methods, physical/chemical process catalysts, molecular sieve catalysts, etc., can solve the problem of poor structural stability of MCM-41, and achieve the effect of improving structural stability

Active Publication Date: 2007-11-14
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the structural stability of MCM-41 is not very good

Method used

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  • Method for preparing modified MCM-41/aluminium oxide composite carrier
  • Method for preparing modified MCM-41/aluminium oxide composite carrier
  • Method for preparing modified MCM-41/aluminium oxide composite carrier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Dissolve 6.6g of sodium fluoride in 50ml of water, add 24g of γ-Al 2 o 3 , soaked for 24h, get F - Modified alumina. Then add 352ml water glass (modulus is 3.0, SiO 2 The content is 26m%) in the above F-modified γ-Al 2 o 3 In, soak for 6h. Take 6g of cetyltrimethylammonium bromide and mix it with 100ml of water, stir to form a slurry, mix the two, stir for 1h, and adjust the pH value to 11.0 with 2mol / L dilute sulfuric acid. The composition of the mixture is: 4.5Na 2 O: 8.3SiO 2 : Al 2 o 3 :0.67F:0.07CTAB:380H 2 O. Hydrothermal crystallization at 140°C for 24h in an autoclave lined with Teflon, the product was taken out, washed 5 times with 100ml of distilled water, dried at 110°C for 12h, and calcined at 550°C for 5h to obtain white MCM-41 / γ -Al 2 o 3composite material1. The XRD results are shown in Figure 1.

Embodiment 2

[0038] Dissolve 6.6g of sodium fluoride in 50ml of water, add 24g of γ-Al 2 o 3 , soaked for 24h, get F - Modified alumina. Then add 352ml water glass (modulus is 3.0, SiO 2 The content is 26m%) in the above F-modified γ-Al 2 o 3 In, soak for 6h. Take 6g of cetyltrimethylammonium bromide and mix with 100ml of water, stir to form a slurry, mix the two, after stirring for 1h, adjust the pH value to 12.0 with 2mol / L dilute sulfuric acid, the composition of the mixture is: 4.5Na 2 O: 8.3SiO 2 :Al 2 o 3 :0.67F:0.07CTAB:380H 2 O. Hydrothermal crystallization at 140°C for 48h in an autoclave lined with Teflon, the product was taken out, washed 5 times with 100ml of distilled water, dried at 110°C for 12h, and calcined at 550°C for 5h to obtain white MCM-41 / γ -Al 2 o 3 Composite material 2. The XRD results are shown in Figure 2.

Embodiment 3

[0040] Dissolve 6.6g of sodium fluoride in 50ml of water, add 24g of γ-Al 2 o 3 , soaked for 24h, get F - Modified alumina. Then add 704ml water glass (modulus is 3.0, SiO 2 The content is 26m%) in the above F-modified γ-Al 2 o 3 In, soak for 6h. Take 6g of cetyltrimethylammonium bromide and mix with 100ml of water, stir to form a slurry, mix the two, after stirring for 1h, adjust the pH value to 12.0 with 2mol / L dilute sulfuric acid, the composition of the mixture is: 4.5Na 2 O: 16.6SiO 2 :Al 2 o 3 :0.67F:0.07CTAB:380H 2 O. Hydrothermal crystallization at 140°C for 24h in an autoclave lined with Teflon, the product was taken out, washed 5 times with 100ml of distilled water, dried at 110°C for 12h, and calcined at 550°C for 5h to obtain white MCM-41 / γ -Al 2 o 3 Composite material 3. The XRD results are shown in Figure 3.

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Abstract

The present invention relates to a preparation method of modified MCM-41 / aluminium oxide composite carrier material, belonging to the field of composite new material technology. Said invention uses F- modified aluminium oxide as aluminium source, uses water-glass as silicon source, uses hexadecyl trimethyl ammonium bromide as template agent and adopts a hydrothermal synthesis process to prepare the invented MCM-41 / aluminium oxide composite material. Said MCM-41 / aluminium oxide composite material can be used as carrier of hydrogenation catalyst for diesel oil hydrogenation desulfurisation, hydrogenation denitrification, aromatic hydrocarbon hydrogenation saturation and heavy distillate hydrotreating process.

Description

technical field [0001] The invention belongs to the technical field of composite new materials, relates to a preparation method of a composite carrier material, and particularly designs a preparation method of an MCM-41 / alumina composite material prepared by F-modified alumina. Background technique [0002] Composite materials synthesized by surfactants as templates have broad application prospects and academic research value in the fields of macromolecule conversion, catalysis, catalyst support, adsorption separation, and separation and purification of biomacromolecules. [0003] U.S. Patent US5098684 provides a kind of method for preparing mesoporous molecular sieve MCM-41, 100g cetyltrimethylammonium hydroxide solution and 100g tetramethylammonium hydroxide solution (25%) are mixed, stir, add 25g0. 02 microns of silicon oxide hydrate (containing 6wt.% of free water and 4.5wt.% of bound water), the mixture was hydrothermally crystallized overnight at 150°C in an autoclave,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/06
Inventor 刘百军黄伟莉
Owner BC P INC CHINA NAT PETROLEUM CORP
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