Macroporous alumina and preparation method thereof

A technology of macroporous alumina and pore volume, applied in chemical instruments and methods, alumina/aluminum hydroxide, catalyst carriers, etc., can solve the problems of cumbersome preparation steps, increased alumina production operation cost, complicated washing process, etc. Achieve the effect of inhibiting agglomeration, overcoming the dispersion of pore distribution, poor strength and high specific surface area

Active Publication Date: 2015-04-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problems of 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 alumina modified by this method have increased, there are almost no pores with a pore diameter larger than 100nm
This method can prepare alumina supports with larger pore volume and specific surface area, but the preparation steps are cumbersome and need to be improved

Method used

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  • Macroporous alumina and preparation method thereof

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Experimental program
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Effect test

Embodiment 2

[0031] 1L sodium metaaluminate aqueous solution (A1 2 o 3 Concentration is 20g / 100ml ) and 1.5L aluminum sulfate aqueous solution (A1 2 o 3 The concentration is 5g / 100ml ) and 200mL of complex chelating agent solution (including 11 grams of methyl acetoacetate and 44 grams of acetic acid) were respectively put into high-position containers, and the flowmeter connected to the bottom flowed into a stirring tank containing 200mL of clean water. In the stainless steel reactor of the reactor and heating mantle, sodium metaaluminate aqueous solution, aluminum sulfate aqueous solution and complex chelating agent aqueous solution are fed into the reactor in parallel for gelation reaction. The system temperature is 85°C and the pH value is controlled at 9.5. The reaction was stopped after 45 minutes. Aged for 2.0 hours at a temperature of 85°C and a pH of 9.0. Filter and wash. Dry at 130°C for 4 hours, shape, then dry at 130°C for 4 hours, and then bake at 780°C for 6 hours to ...

Embodiment 3

[0033] 1.5L sodium metaaluminate aqueous solution (A1 2 o 3 Concentration is 20g / 100ml), 2.0L aluminum sulfate aqueous solution (A1 2 o 3 The concentration is 5g / 100ml) and 200mL of complex chelating agent solution (including 10 grams of butyl acetoacetate and 70 grams of formic acid) are respectively placed in a high-position container, and the bottom is connected to a flowmeter and agitator with 200mL of clean water And a stainless steel reactor with a heating jacket, sodium metaaluminate aqueous solution, aluminum sulfate aqueous solution and complex chelating agent aqueous solution flow into the reactor for gelation reaction, the system temperature is 75°C, and the pH value is controlled at 10.0. The reaction was stopped after 45 minutes. Aged for 2.0 hours at a temperature of 75°C and a pH of 10.0. Filter and wash. Dry at 120°C for 5 hours, shape, then dry at 120°C for 5 hours, and bake at 700°C for 8.0 hours to obtain sample 3.

Embodiment 4

[0035] 1.5L sodium metaaluminate aqueous solution (A1 2 o 3 Concentration is 20g / 100ml), 2.0L aluminum sulfate aqueous solution (A1 2 o 3 Concentration: 5g / 100ml) and 200mL clean water (including 60 grams of complex chelating agent, ethyl acetoacetate: 10 grams, formic acid: 50 grams), respectively put into the container at the high position, and the flow meter flows into the belt stirrer In the stainless steel reactor with heating jacket, sodium metaaluminate aqueous solution, aluminum sulfate aqueous solution and gemini surfactant solution flow into the reactor in parallel for gelation reaction. The system temperature is 85°C and the pH value is controlled at 10.5. The reaction was stopped after 45 minutes. Aged for 2.0 hours at a temperature of 85°C and a pH of 10.5. Filter and wash. It was dried at 110°C for 5 hours, shaped, then dried at 110°C for 5 hours, and then calcined at 750°C for 7.0 hours to obtain sample 4.

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Abstract

The invention discloses a preparation method of a macroporous alumina carrier. The method comprises the following steps: (1) preparing a solution containing grease and organic acid, an acidic aluminum solution and a basic aluminate solution, and respectively marking into a solution A, a solution B and a solution C; (2) combining the solution B and the solution C to perform gelation reaction, regulating pH to be 9.0 to 11.0, wherein the pH is preferably is 9.5 to 10.5; controlling the reaction temperature to be 60 to 95 DEG C, wherein the reaction temperature is preferably 75 to 85 DEG C; performing ageing, filtering, washing and drying after the gelation reaction, wherein the solution A is added before or during gelation; the solution A, the solution B and the solution C are preferably combined to perform the gelation reaction; (3) forming the material obtained in step (2), and then drying and roasting to obtain the macroporous alumina carrier, The macroporous alumina carrier prepared by the method has the advantages of being large in aperture, large in pore volume and high in strength.

Description

technical field [0001] The present invention relates to a macroporous alumina and its preparation method, in particular to a macroporous alumina carrier used for hydrogenation of heavy and residual oil and its preparation method, especially for hydrogenation demetallization or hydrogenation protection Alumina carrier of agent and preparation method thereof. Background technique [0002] With the increasingly heavy and inferior crude oil and the increasing market demand for light oil products, environmental protection regulations are becoming increasingly stringent, and the technology of residuum lightening has become one of the important issues in the world's petroleum processing industry today. Since residual oil contains a large amount of colloids and asphaltenes and other macromolecular compounds, it is required that the residual oil hydrogenation catalyst must have larger pores to ensure that these macromolecular compounds enter the catalyst to participate in the reactio...

Claims

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Application Information

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IPC IPC(8): C01F7/02B01J32/00B01J35/10
Inventor 段日张艳侠付秋红包洪洲霍稳周陈明乔凯
Owner CHINA PETROLEUM & CHEM CORP
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