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Composite loading nano-titania carrier and its prepn

A nano-titanium dioxide, composite carrier technology, applied in titanium dioxide, catalyst carrier, chemical instruments and methods, etc., can solve the problems of high impurity content and affecting catalyst activity, etc.

Inactive Publication Date: 2002-04-17
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Nano-TiO 2 Generally, inorganic salts (Ti(SO 4 ) 2 , TiCl 4 ) as raw material, prepared by liquid phase method, but the TiO prepared by this method 2 The impurity content is relatively large, which affects the activity of the catalyst

Method used

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  • Composite loading nano-titania carrier and its prepn
  • Composite loading nano-titania carrier and its prepn
  • Composite loading nano-titania carrier and its prepn

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Example 1 (γ-Al 2 o 2 Load 5 ~ 10nm (1nm = 10 -9 m) TiO with a content of 10 wt% 2 )

[0015] Preparation:

[0016] Beat the pseudo-boehmite in an appropriate amount of water for 2 hours (the amount of water: (water absorption of pseudo-boehmite (ml / g)+0.5) * The amount of pseudo-boehmite (g)).

[0017] Titanium colloid was prepared according to butyl titanate: absolute ethanol: water: nitric acid (molar ratio) of 1:9:3:0.3.

[0018] Under vigorous stirring, press the loaded TiO 2 10wt% ratio, drop an appropriate amount of titanium glue into the slurry of pseudo-boehmite and water, and then place it in the air to dry naturally for 24 hours, dry at 60°C for 12 hours, and dry at 120°C for 4 hours, then dry at 200, 300 , 400, and 550°C for 2 hours in sequence.

[0019] Supported TiO can be found by XRD spectrum 2 For the anatase type. Calculation of TiO by XRD diffraction broadening method 2 The average particle size is 9nm. Observed by TEM, TiO 2 The particl...

Embodiment 2

[0020] Example 2 (γ-Al 2 o 3 Loading 5~10nm content is 20wt% TiO 2 )

[0021] Preparation method is the same as embodiment 1, by TiO 2 Titanium gel was prepared with a loading of 20wt% and dropped into the slurry of pseudo-boehmite and water, and then placed in the air to dry naturally for 24 hours, at 60°C for 12 hours, at 120°C for 4 hours, and then at 200°C , 300, 400, and 550°C for 2 hours in sequence.

[0022] Through XRD experiments (results shown in Figure 1a), supported TiO 2 It is anatase type with an average particle size of 7.9nm. Observed by TEM (results shown in Figure 2), TiO 2 The particle size is between 5 and 10nm.

Embodiment 3

[0023] Example 3 (γ-Al 2 o 3 Loading 15~20nm content is 10wt% TiO 2 )

[0024] Preparation:

[0025] Immerse pseudo-boehmite in an appropriate amount of absolute ethanol for 2 hours (the amount of absolute ethanol: (pseudo-boehmite ethanol absorption rate (ml / g)+0.5) * Amount of pseudo-boehmite (g)).

[0026] Titanium colloid was prepared according to butyl titanate: absolute ethanol: water: nitric acid (molar ratio) of 1:9:3:0.3.

[0027] Under vigorous stirring, press the loaded TiO 2 The proportion of 10wt%, drop an appropriate amount of titanium glue into the slurry made of pseudo-boehmite and absolute ethanol. Then place it in the air to dry naturally for 24 hours, at 60°C for 12 hours, and at 120°C for 4 hours. Then calcined at 200, 300, 400, 550° C. for 2 hours.

[0028] Supported TiO can be found by XRD spectrum 2 For the anatase type. Calculation of TiO by XRD diffraction broadening method 2 The average particle size is 18.8nm. Observed by TEM, TiO 2 The ...

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Abstract

A loading type of nanometer titania composite carrier is constituted by loading 5-20 nm TiO2 in 10-40 wt% onto gamma-Al2O3. Titania sol is first prepared through sol-gel process and then dropped into pseudo-then diaspore pulp of different solution; and the product is finally processed through drying, calcination successively at 200, 300, 400 and 500 deg.c for 2 hr each. The present invention loads nanometer Tio2 onto macroporous Al2O3 to form the composite nanometer carrier. This can utilize the superority of nanometer TiO2 while overcoming the demerits. By means of the micro design, surface acidity regulation of loaded TiO2 and loading active component, the hydrorefining activity of catalyst may be raised effectively.

Description

technical field [0001] The invention belongs to the preparation method of loaded nano titanium dioxide composite carrier. In γ-Al 2 o 3 Nano-TiO with controllable grain size loaded on it 2 , so that the supported TiO 2 The microscopic design of the composite carrier and the modulation of surface acidity make it possible to carry out catalytic reactions on the carrier with a controllable surface microstructure. By further loading active components on the composite carrier, such as CoMo, NiW, etc., the catalytic activity of the catalyst for hydrorefining can be effectively improved. Background technique: [0002] As we all know, nanomaterials have very special structural effects such as volume effect, surface effect, quantum effect and macroscopic quantum tunneling effect. New functional materials made of nanomaterials have gradually revealed a huge role in promoting future science and technology and national economic construction. With the expan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06B01J32/00B01J37/02C01G23/053C01G45/06C10G45/04
Inventor 李伟胡见波张明慧陶克毅
Owner NANKAI UNIV
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