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Preparation method for alumina dry gel

A technology of alumina drying and gelling, applied in the direction of alumina/aluminum hydroxide, etc., can solve the problems of small specific surface area, unfavorable heavy oil hydrogenation, desulfurization, hydrogenation conversion reaction, etc., and achieve uniform accumulation mode and molecular movement The effect of faster speed and higher utilization

Active Publication Date: 2015-02-18
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the alumina carrier prepared by this gelling method has a large average pore size, it has a small specific surface area, and using it as a catalyst carrier is not conducive to heavy oil hydrodesulfurization and hydroconversion reactions.

Method used

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  • Preparation method for alumina dry gel
  • Preparation method for alumina dry gel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Preparation of sodium metaaluminate solution concentration is 140gAl 2 o 3 / L, a total of 2.5L; the concentration of aluminum sulfate solution is 40gAl 2 o 3 / L, a total of 5.0L; in the mixed solution of sodium lauryl sulfate and hydroxypropyl methylcellulose (HPMC), the concentration of sodium lauryl sulfate is 1.0g / L, and the concentration of HPMC is 1.0g / L, the total 1.0L.

[0028] Pre-add bottom water to the reaction tank, set the temperature of the reaction tank to 75°C, and start stirring. In the process of adding the prepared sodium metaaluminate solution and aluminum sulfate solution into the reaction tank in parallel at a certain flow rate, at the same time, add the mixed solution of sodium lauryl sulfate and hydroxypropyl methylcellulose (HPMC) in parallel to adjust The pH is 6.5. After the materials were added, an alkaline solution was added to the obtained product to adjust the pH value to 8.8, the reaction temperature was 90° C., and the reaction time ...

Embodiment 2

[0030] Other conditions are the same as embodiment 1, just sodium lauryl sulfate is replaced by sodium octadecyl sulfate, the sodium octadecyl sulfate concentration of preparation is changed into 30g / L, HPMC is replaced by MC, and the MC concentration of preparation changes into 20g / L, alumina B was prepared.

Embodiment 3

[0032] Other conditions were the same as in Example 1, except that the concentration of sodium lauryl sulfate was changed to 50 g / L, and the concentration of HPMC was changed to 50 g / L to prepare alumina C.

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Abstract

The invention discloses a preparation method for alumina dry gel. The method comprises the following steps: in the process of gel formation by concurrent flow of an alkaline solution containing aluminum and an acidic solution containing aluminum, adding an additive and an organic template agent in the manner of concurrent flow at the same time, controlling proper reaction conditions and carrying out gel formation, wherein the organic template agent is cellulose ethers; then adding an alkaline solution to adjust a pH value; and then carrying out filtering, washing and drying so as to obtain the alumina dry gel. The alumina dry gel prepared by using the method has the advantages of a large specific surface area, a great pore volume and a reasonable pore structure and is particularly applicable as a carrier component for a heavy oil hydrotreating catalyst, especially applicable as a carrier component for a residual oil hydrodesulfurization or hydro-conversion catalyst.

Description

technical field [0001] The invention relates to a preparation method of alumina dry glue, in particular to a carrier component used for heavy residue oil hydrotreating catalysts. Background technique [0002] Alumina is one of the most commonly used industrial raw materials, and plays an important role in the fields of catalysts, ceramics, and refractory materials. Due to its good mechanical strength, thermal stability, adjustable acid properties and pore structure, alumina is widely used as a catalyst carrier in the field of catalysis. At present, the world's emphasis on hydrogenation technology makes the demand for hydrogenation catalysts in the catalyst market continue to increase. At present, the most widely used hydrogenation catalysts are usually supported catalysts, and their supports are generally alumina and composite supports derived from it, such as TiO 2 -Al 2 o 3 , SiO 2 -Al 2 o 3 etc., or add some additives to the alumina carrier for modification...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F7/02
Inventor 刘立军张成王永林杨刚袁胜华
Owner CHINA PETROLEUM & CHEM CORP