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Alumina support with dual apertures and preparation method thereof

A technology of alumina carrier and alumina, which is applied in the direction of catalyst carrier, chemical instruments and methods, alumina/aluminum hydroxide, etc., can solve the problems of application limitation, complicated temperature control, etc., and achieve simplified methods, low acid content, and elimination of The effect of flying temperature

Active Publication Date: 2005-11-02
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, when carbon black powder and organic pore-enlarging agent are used to prepare alumina carriers with double pores, the application of this method is limited due to the existence of temperature jump phenomenon during high-temperature calcination and complicated temperature control.

Method used

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  • Alumina support with dual apertures and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0030] Take by weighing 300 grams of pseudo-boehmite powder (commercial name is aluminum hydroxide dry rubber powder, produced by Changling Catalyst Factory, dry basis is 65% by weight), add 9 grams of asparagus powder, 120 grams of ammonium bicarbonate and mix uniformly, add 300 milliliters of an aqueous solution containing 10 grams of ammonium fluoride was kneaded at room temperature for 15 minutes, extruded into a Φ1.1 mm trefoil strip on an extruder, dried at 120°C for 4 hours, and then calcined at 750°C for 2 hours to obtain Carrier Z1.

[0031] The acid content, fluorine content, specific surface area, pore distribution and pore volume of Z1 are listed in Table 1.

example 2

[0033]Take by weighing 300 grams of pseudo-boehmite powder (with example 1), add 12 grams of polyvinyl alcohol, 140 grams of ammonium citrate and mix uniformly, add 300 milliliters of aqueous solutions containing 8 grams of hydrofluoric acid, knead at room temperature for 10 minutes, Extruded into Φ2.5 mm cylindrical bars on a bar machine, then rolled into Φ2.5 mm spherical particles in a spheronizer, dried at 120°C for 2 hours, and then calcined at 750°C for 2 hours to obtain carrier Z2.

[0034] The acid content, fluorine content, specific surface area, pore distribution and pore volume of Z2 are listed in Table 1.

example 3

[0036] Take by weighing 300 grams of pseudo-boehmite powder (produced by Shanxi Aluminum Works, dry basis is 74% by weight), add 10 grams of fennel powder, 12 grams of methylcellulose, and 100 grams of ammonium bicarbonate and mix uniformly, add 280 milliliters of urea-containing 40 grams, 12 grams of ammonium fluoride aqueous solution, kneading at room temperature for 15 minutes, extruded into a Φ1.5 mm butterfly strip on the extruder, dried the wet strip at 150 ° C for 4 hours, and then kept it in a roasting furnace at a constant temperature of 750 ° C for 2 hours, carrier Z3 was obtained.

[0037] The acid content, fluorine content, specific surface area, pore distribution and pore volume of Z3 are listed in Table 1.

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PUM

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Abstract

The present invention is alumina carrier with double holes and its preparation process. The carrier contains alumina in 95-99.9 wt% of carrier and halogen element in 0.1-5 wt%, and has acid amount of 0.2 mmol / g. The preparation process of the carrier includes mixing alumina precursor with pore expander, forming and roasting the alumina precursor at 600-850 deg.c for 1-10 hr. The pore expander includes one kind nitrogen containing compound except acid and one kind one halide. The alumina carrier with double holes has low acid amount and may be used widely as carrier for heavy oil hydrogenating catalyst.

Description

technical field [0001] The invention relates to an alumina carrier and a preparation method thereof, more specifically to an alumina carrier with double pores and a preparation method thereof. Background technique [0002] The deep processing of residual oil is not only conducive to improving the utilization rate of crude oil and alleviating the tense trend of energy supply, but also reducing environmental pollution and achieving clean utilization of energy. Sulfur, nitrogen, metal and other impurities in crude oil are mostly concentrated in the residual oil, and these impurities will pollute the corresponding catalysts in the subsequent processing, so these impurities must be removed by hydrotreating first. Compared with distillate oil, residual oil contains a large number of macromolecular reactants such as asphaltenes and colloids, and their diffusion process in the catalyst will directly affect the hydrogenation reaction activity of the catalyst. ...

Claims

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Application Information

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IPC IPC(8): B01J32/00
Inventor 胡大为杨清河刘滨朱立聂红牛传峰戴立顺石亚华李大东
Owner CHINA PETROLEUM & CHEM CORP
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