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Silicon-containing alumina and preparation method thereof

A silica-alumina, clay technology, applied in chemical instruments and methods, catalyst activation/preparation, catalyst carrier, etc., can solve the problems of unsuitable hydrotreating catalyst, small pore size, etc., achieve low cost, increase acid content, improve The effect of cracking performance

Active Publication Date: 2013-01-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The silicon-containing carrier prepared by this gel-forming method has a small pore size and is not suitable for use as a catalyst for hydroprocessing of heavy oil or residual oil

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Preparation of sodium metaaluminate solution concentration is 45gAl 2 o 3 / L, the caustic ratio is 1.45, a total of 1.6L, and the concentration of aluminum sulfate solution is 15gAl 2 o 3 / L total 0.8L, ready for use.

[0026] Roast kaolin raw soil in a high-temperature furnace at a temperature of 600°C and hold a constant temperature for 4 hours. After cooling, weigh 30 g and put it into a container. Add 150 mL of 2 mol / L nitric acid and 150 mL of 2 mol / L citric acid, and heat for reaction. The reaction temperature is 60°C, the reaction time is 8h.

[0027] Add 700 mL of distilled water to the modified kaolin slurry, the slurry has a solid content of 3 wt%, and heat to 70°C. Add the prepared sodium metaaluminate solution to the modified kaolin slurry, adjust the pH to 10.89, then add aluminum sulfate solution to adjust the pH to 8.5, keep the pH at 8.5, and add sodium metaaluminate and aluminum sulfate in parallel , the temperature was kept at 70°C during the gela...

Embodiment 2

[0029] Other conditions were the same as in Example 1, except that the amount of kaolin after roasting was increased to 60 g, and the solid content in the slurry was 6 wt%, to prepare silicon-containing alumina B.

Embodiment 3

[0031] Other conditions are the same as in Example 1, except that kaolin is replaced by halloysite, nitric acid is replaced by sulfuric acid, citric acid is replaced by acetic acid, and silicon-containing alumina C is prepared.

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PUM

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Abstract

The invention discloses a method for preparing silicon-containing alumina, which comprises the following steps of: preparing modified clay, roasting original clay at high temperature, and reacting the clay with mixed acid, wherein the mixed acid is a mixture of strong acid and weak acid; performing a gelling reaction of aluminum-containing acid solution and alkaline solution in modified clay size, ageing, filtering, washing, drying, roasting and the like to prepare the silicon-containing alumina, or drying to prepare silicon-containing alumina dry glue without roasting. Compared with that prepared by the conventional method, the silicon-containing alumina prepared by the method has the advantages of large pore diameter, proper pore structure and the like, and can be used for preparing heavy oil or residual oil hydrotreating catalysts.

Description

technical field [0001] The invention relates to a silicon-containing alumina and a preparation method thereof, in particular to an alumina suitable for heavy oil or residual oil hydrotreating catalyst carrier material and a preparation method thereof. Background technique [0002] In the preparation of catalysts used in petroleum refining, alumina or γ-Al containing a small amount of one or more other elements such as Si, P, Ti, B, Mg, F, etc. is usually used 2 o 3 as the carrier. Many studies have shown that adding an appropriate amount of silica to alumina can increase the acidity and specific surface area of ​​alumina, which is beneficial to polymerization and hydrogenation reactions. In the preparation of silicon-containing alumina, silicon element can be introduced into the system at different stages, so as to adjust the acidity of the catalyst and / or improve the interaction between the active component and the support. However, the addition of silicon-containing add...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J32/00B01J21/12B01J37/00
Inventor 朱慧红孙素华刘杰王永林杨光
Owner CHINA PETROLEUM & CHEM CORP
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