Silicon-containing alumina supporter and preparing method thereof

A technology of alumina carrier and silicon alumina, which is applied in the direction of catalyst carrier, chemical instruments and methods, chemical/physical processes, etc., can solve the problem of uneven distribution of silicon, achieve reduced production costs, excellent high dispersion, and multi-surface activity center effect

Inactive Publication Date: 2005-04-20
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As mentioned above, this method also has the problem of uneven distribution of silicon

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Weigh respectively 188.0 g of macroporous aluminum hydroxide powder and 226.0 g of small pore aluminum hydroxide powder (pore volume 0.498ml / g, The average pore diameter is 8.1nm and the specific surface area is 228m 2 / g), the nano-silica produced by Tianjin Chemical Industry Co., Ltd. accounts for 4.0%, 75.0g deionized water, extrusion aid scallop powder 12.0g and 8g citric acid, mix homogeneously, add by 26.0g40% nitric acid solution and 325.0 The solution prepared by g deionized water is kneaded into a plastic body, extruded into a clover strip of the designed size on an extruder, dried at a drying temperature of 110°C for 8 hours, and then roasted at 500°C for 4 hours, that is, the sample ( 1), the properties are shown in Table 1.

Embodiment 2

[0020] In embodiment 1, change nano silicon dioxide 4.0% into 6.1%, promptly cost example, property sees table 1 (2).

Embodiment 3

[0022] In embodiment 1, change nano silicon dioxide 4.0% into 2.3%, promptly cost example, property sees table 1 (3).

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Abstract

The invention relates to a porous silicon-containing alumina carrier and a preparation method thereof. The pore volume of the carrier is 0.55-0.68ml / g, the average pore diameter is 6.5-9.5nm, and the specific surface area is 270-320m 2 / g, the bulk density is 0.58-0.68g / ml, and the silicon content is 0.5-10.0% in silicon dioxide. The preparation method of the silicon-containing alumina carrier of the present invention is that in the process of mixing aluminum hydroxide or aluminum oxide with deionized water or aqueous solution, adding a highly dispersible nano-silicon-containing compound such as nano-silicon dioxide, and kneading to form a plastic body, and then shaped, dried, and calcined to prepare the catalyst carrier. The alumina carrier prepared by the method of the present invention overcomes the disadvantages of uneven distribution of auxiliary silicon in the prior art and the existence of influence on the structure of alumina in the bulk phase, and is used for the preparation of heavy oil, especially heavy distillate oil for hydrogenation pretreatment Catalyst with excellent physical and chemical properties and performance.

Description

1. Technical field [0001] The invention relates to a silicon-containing alumina carrier and a preparation method thereof, in particular to a preparation method of a porous silicon-containing alumina carrier capable of maintaining the microstructure characteristics of alumina after adding a silicon additive. 2. Background technology [0002] Generally, most catalysts for hydrogenation pretreatment of hydrocarbon feeds are supported by alumina and alumina containing a small amount of silicon. The surface properties of the support, such as the amount of acid on the surface of the support, acid strength, etc., and the pore properties, such as the average pore diameter or specific surface area, will have a great impact on the properties of the catalyst. When studying the modulation effect of silica on alumina, it has been proved that the intervention of silica has an effect on the catalyst in terms of acid properties and metal dispersion properties. Studies have found that addin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/06B01J32/00
Inventor 魏登凌彭绍忠
Owner CHINA PETROLEUM & CHEM CORP
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