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TiO2-Al2O3 composite carrier and preparation method thereof

A tio2-al2o3, composite carrier technology, used in catalyst carriers, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of single pore size distribution, small proportion, no formation of double pore channels, etc., and achieve large specific surface area. Effect

Active Publication Date: 2014-02-12
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] For TiO in prior art 2 -Al 2 o 3 The pore size distribution of the composite carrier is single, no double pores are formed, and the proportion of pores larger than 100 nm is very small. The purpose of the present invention is to provide a TiO 2 -Al 2 o 3 Composite carrier and preparation method thereof, the composite carrier of the present invention has a bimodal pore structure

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Put the aqueous solution of 20% fructose into the reactor for hydrothermal reaction, the reaction temperature is 150 °C, the reaction pressure is 0.5 MPa, the reaction time is 10 h, after the reaction is completed, it is cooled to room temperature, and centrifuged Carbon particles with a particle diameter of 400-600 nm were obtained.

[0035] (2) Add nano-scale titanium hydroxide and polyethylene glycol into deionized water, add nitric acid dropwise during stirring to adjust the pH value, and obtain a stable and transparent sol with a pH value of 1. The content of nanoscale titanium hydroxide in the sol is 20%, and the content of polyethylene glycol is 0.5%.

[0036] (3) Add the carbon particles obtained in step (1) into the sol in step (2), and keep stirring, so that nano-scale titanium hydroxide is adsorbed on the surface of the carbon particles. Then mixed with pseudo-boehmite powder, kneaded evenly on a kneader, extruded, dried at 100 °C, and roasted at 500...

Embodiment 2

[0039] (1) Put the aqueous solution of lactose with a concentration of 10% into the reactor for hydrothermal reaction. The reaction temperature is 100 °C, the reaction pressure is 0.1 MPa, and the reaction time is 30 h. Carbon particles with a particle diameter of 200-400 nm were obtained.

[0040] (2) Add nano-sized titanium hydroxide and polyvinyl alcohol into deionized water, add nitric acid dropwise during stirring to adjust the pH value, and obtain a stable and transparent sol with a pH value of 5. The content of nano-sized titanium hydroxide in the sol is 10%, and the content of polyvinyl alcohol is 0.1%.

[0041] (3) Add the carbon particles obtained in step (1) into the sol in step (2), and keep stirring, so that nano-scale titanium hydroxide is adsorbed on the surface of the carbon particles. Then mixed with pseudo-boehmite powder, kneaded evenly on a kneader, extruded, dried at 100 °C, and roasted at 400 °C to obtain the TiO 2 -Al 2 o 3 Composite carrier.

...

Embodiment 3

[0044] (1) Put the aqueous solution of 30% ribose into the reactor for hydrothermal reaction, the reaction temperature is 200 ℃, the reaction pressure is 1.5 MPa, and the reaction time is 1 h. Carbon particles with a particle diameter of 600-800 nm were obtained.

[0045] (2) Add nano-sized titanium hydroxide and glycerol into deionized water, and add nitric acid dropwise during stirring to adjust the pH value, and obtain a stable and transparent sol with a pH value of 0.5. The content of nanoscale titanium hydroxide in the sol is 30%, and the content of glycerol is 1%.

[0046] (3) Add the carbon particles obtained in step (1) into the sol in step (2), and keep stirring, so that nano-scale titanium hydroxide is adsorbed on the surface of the carbon particles. Then mixed with pseudo-boehmite powder, kneaded evenly on a kneader, extruded, dried at 100 °C, and roasted at 700 °C to obtain the TiO 2 -Al 2 o 3 Composite carrier.

[0047] The carrier obtained in this embodi...

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Abstract

The present invention discloses a TiO2-Al2O3 composite carrier and a preparation method thereof. In the carrier, Al2O3accounts for 85-95%, and TiO2 accounts for 5-15%, and TiO2 distributes on pore walls of macropores with aperture of 100-600nm. Compared with the prior art, the invention has the advantages of: first, TiO2-Al2O3 composite carrier has a pore structure of doublet distribution; mesopores provide larger specific surface area, and macropores facilitate migration of substances with large molecular diameter and rapid emergence of product molecules, so as to prevent obstruction of a carrier channel. Second, the TiO2 distributes on pore walls of macropores to fully play intrinsic chemical and crystal structure characteristics of TiO2. The TiO2-Al2O3 composite carrier of the invention can be used as a carrier of a catalyst for hydrofining of C5-C15 distillate oil.

Description

technical field [0001] The present invention relates to a kind of TiO 2 -Al 2 o 3 Composite support and preparation method thereof, specifically, a TiO with bimodal pore structure 2 -Al 2 o 3 Composite carrier and its preparation method. Background technique [0002] Most of the traditional industrial hydrotreating catalysts are based on A1 2 o 3 As a carrier, Chinese patent CN102030351 (a macroporous alumina with bimodal pore distribution and its preparation method) adopts a two-stage aging method to prepare macroporous alumina with bimodal pore distribution, and its pore volume is 0.6-3.0 cm 3 / g, the specific surface area is 90-300 m 2 / g, in which the pores of 3.5-10 nm account for 20-55% of the total pore volume, and the most probable pore diameter is located at 5-9 nm; the pores of 20-80 nm account for 20-55% of the total pore volume, and the most probable pore diameter Located at 30-60 nm. The carrier does not use a pore-enlarging agent and an organic solven...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J32/00B01J35/10C10G45/04
Inventor 王继元樊继利束长好堵文斌张开伦许建文卞伯同陈韶辉柏基业
Owner CHINA PETROLEUM & CHEM CORP
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