Alumina supporter and preparation method thereof

A kind of alumina carrier, alumina technology, applied in the direction of catalyst carrier, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of increasing alumina production operating costs, complicated washing process, limited hole expansion, etc., and achieve high strength , The preparation process is simple, and the effect of improving the hydrogenation reaction activity

Active Publication Date: 2009-06-24
FUSHUN RES INST OF PETROLEUM & PETROCHEMICALS SINOPEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problems in the above-mentioned method for preparing the carrier are: (1) the washing process is relatively complicated, which increases the operating cost of alumina production
(2) Although the pore diameter and pore volume of the alumina modified by this method have increased, there are almost no pores with a pore diameter larger than 100nm
The main problems in the above-mentioned method for preparing the carrier are as follows: (1) the aluminum hydroxide used in the method and water beating is to make the dried aluminum hydroxide finely ground and then beating wi

Method used

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Examples

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preparation example Construction

[0036] In the preparation process of the alumina carrier of the present invention, in the described acidic aluminum salt solution, Al 2 o 3 Concentration is 2~10g / 100ml; In the described alkaline aluminate aqueous solution, Al 2 o 3 The concentration is 8~30g / 100ml;

[0037] The drying described in the step (8) is drying at a temperature of 50-140°C for 3-10 hours; the roasting is carried out at a constant temperature of 800-980°C for 1-4 hours at a heating rate of 200-300°C / hour.

[0038] In the present invention, the specific surface and pore structure of the catalyst are tested by Auto Pore IV 9510 type physical performance testing instrument produced by American Mike. Catalyst strength is measured by ZQJ-II intelligent particle strength testing machine produced by Dalian Equipment Diagnosis Factory.

[0039] The preparation method of the alumina carrier with large pore diameter and large pore volume of the present invention is further illustrated with the following exa...

Embodiment 1

[0041] 2L sodium metaaluminate aqueous solution (Al 2 o 3 Concentration is 15g / 100ml) and 3L aqueous solution of aluminum sulfate (Al 2 o 3 The concentration is 2g / 100ml) into the container at the high position, and the flowmeter connected to the bottom flows into the stainless steel container with 6L clean water (containing 1g starch) equipped with a stirrer and a heating jacket, and is heated to 80°C; under the condition of stirring , add aluminum sulfate solution to reduce the pH value of the slurry to 3.5. After 5 minutes of stabilization, add the two materials into the stainless steel tank at the same time. value rises to 9.8, stop adding sodium metaaluminate solution, and stabilize for 10 minutes; pass through aluminum sulfate solution, reduce the pH value to 3, and stabilize for 10 minutes; pass through sodium metaaluminate solution, make the pH value rise to 10. Repeat the swing 3 times. After the swing is over, stabilize for 10 minutes with NH 4 HCO 3 The pH val...

Embodiment 2

[0043] 2L sodium metaaluminate aqueous solution (Al 2 o 3 Concentration is 20g / 100ml) and 3L aqueous solution of aluminum sulfate (Al 2 o 3 The concentration is 8g / 100ml) into the container at the high position respectively, and the flow meter flows into the stainless steel container with 6L clean water (containing 3g starch) with a stirrer and a heating jacket, and heats to 85°C; under the condition of stirring , add aluminum sulfate solution to reduce the pH value of the slurry to 2.5. After 8 minutes of stabilization, add the two materials into the stainless steel tank at the same time. value rises to 10.8, stop adding sodium metaaluminate solution, and stabilize for 10 minutes; pass through aluminum sulfate solution, make the pH value drop to 3.5, and stabilize for 10 minutes; pass through sodium metaaluminate solution, make the pH value rise to 10.8. Repeat the swing 2 times. After the swing is over, stabilize for 10 minutes with NH 4 HCO 3 The pH value of the aqueo...

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PUM

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Abstract

The invention relates to an alumina carrier and a preparation method thereof. The pore distribution of the alumina carrier is as follows: the pore volume of holes with the pore diameter of less than 10 nanometers accounts for less than 10 percent of the total pore volume; the pore volume of holes with the pore diameter between 10 and 50 nanometers accounts for 40 to 80 percent of the total pore volume; the pore volume of holes with the pore diameter between 100 and 1,000 nanometers accounts for 1 to 40 percent of the total pore volume; and the pore volume of holes with the pore diameter between 5,000 and 10,000 nanometers accounts for 1 to 20 percent of the total pore volume. The preparation method for the alumina carrier comprises: adopting a small quantity of starch and/or carbon black as crystal seeds, adopting a method of co-current flow first and swing then to prepare a serum containing aluminum hydroxide, using ammonium carbonate and/or ammonium bicarbonate to adjust the pH value, and finally preparing the alumina carrier. Alumina obtained by the method still maintains high strength under the condition of enlarged pore volume and pore diameter. The alumina carrier is particularly suitable to be a carrier of a residual oil hydrotreating catalyst.

Description

technical field [0001] The invention relates to an alumina carrier and a preparation method thereof, in particular to a macroporous alumina carrier used as a hydrogenation demetallization or hydrogenation protecting agent carrier 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. Most of the impurities such as sulfur and metals in crude oil are concentrated in the residual oil, and these impurities will pollute the downstream 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 colloids and asphaltenes and other macromolecular compounds, and their diffusion process in the catalyst will directly affect the hydrog...

Claims

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Application Information

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IPC IPC(8): B01J32/00B01J21/04B01J35/10
Inventor 刘喜来隋宝宽
Owner FUSHUN RES INST OF PETROLEUM & PETROCHEMICALS SINOPEC CORP
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