A kind of high silica alumina dry glue and preparation method thereof

A technology of silica-alumina and dry glue, which is applied in chemical instruments and methods, catalyst carriers, chemical/physical processes, etc., can solve the problems of small pore volume, many small pores, and low acidity of silica-containing alumina, and achieve improved processing Hydrocracking performance, easy adjustment effect

Active Publication Date: 2017-12-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The resulting silicon-containing alumina has a small pore volume, relatively many small pores, and low acidity, and its comprehensive performance needs to be further improved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Take kaolin and pulverize it on a pulverizer. The pulverized kaolin is roasted in a high-temperature furnace at a temperature of 800° C. for 3 hours. The roasted kaolin is sieved through a 160-mesh sieve to obtain modified kaolin.

[0030] Preparation of sodium metaaluminate solution concentration is 60gAl 2 o 3 / L, the caustic ratio is 3.5, a total of 1.2L, weigh 100g of sieved kaolin, add it to the sodium metaaluminate solution to make a suspension, and control the solution temperature to 50°C.

[0031] A suspension of sodium metaaluminate containing kaolin with a pH value of 2 and a concentration of 25 g SiO 2 Add 3.0L of acidic silica sol / L into the reaction kettle in parallel, control the gel forming temperature at 70°C, and the gel forming pH value at 5.5. After gel formation, add 5wt% sodium carbonate solution to adjust the pH value to 8.0, then enter the aging stage, the aging temperature is 70°C, and the aging time is 1h. The aged slurry was washed with deio...

Embodiment 2

[0033] Other conditions were the same as in Example 1, except that the amount of modified kaolin was increased to 120 g, the pH value of gelation was 6.5, and the gelation temperature was 80° C. to obtain high-silicon alumina dry gel B and high-silicon alumina B respectively.

Embodiment 3

[0035]Other conditions are the same as in Example 1, except that the kaolin is replaced by montmorillonite, added to the sodium metaaluminate solution, heated to 70°C, stirred for 3 hours, and the pH value of the gel is 4.5, and the pH value is adjusted to 7.0 after the gel is completed. , to obtain high-silicon alumina dry glue C and high-silicon alumina C, respectively.

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PUM

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Abstract

The invention discloses a high-silicon alumina dry glue and a preparation method thereof. The method comprises: adding the modified clay calcined at high temperature into the aluminum-containing alkali solution to form a suspension liquid and acidic silica sol to co-flow to form a gel, and then adding an alkaline solution to further form a gel, after aging, filtering and drying to obtain High silica alumina dry glue. The high-silica alumina dry gel obtained by the method has good comprehensive properties such as pore structure and acidity, and is suitable as a carrier material for heavy oil or residual oil hydrocracking catalyst. The hydrocracking catalyst prepared by it has high impurity removal rate, It has the advantages of high conversion rate of heavy oil or residual oil.

Description

technical field [0001] The invention relates to a high-silicon alumina dry glue and a preparation method thereof, in particular to a high-silicon alumina dry glue suitable for heavy oil or residual oil hydrocracking catalyst carrier materials and a preparation method thereof. Background technique [0002] Silicon-containing alumina has the advantages of high specific surface area, good sintering resistance, strong acidity compared with alumina, moderate cracking performance, large average pore size, and high selectivity for heavy components of cracked products compared with carriers containing molecular sieves. Widely used in various reactions in the oil refining industry. [0003] The preparation methods of high silicon alumina mainly include precipitation method, mixing method and impregnation method. For example, the precipitation method is prepared by neutralizing and precipitating a gel with alkali metal silicate (or water glass) and aluminum-containing salt; the mixin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/12B01J32/00C10G49/02
Inventor 朱慧红孙素华刘杰金浩杨光蒋立敬
Owner CHINA PETROLEUM & CHEM CORP
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