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Macropore alumina supporter and its preparation method

A macroporous alumina and alumina technology, which is applied in catalyst carriers, chemical instruments and methods, catalyst activation/preparation, etc., can solve the problems of acid damage, weaken the hydrogenation conversion capacity of the catalyst, and be unsuitable, and achieve strong regulating effect, The effect of improving pore size and solubility

Active Publication Date: 2008-02-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, high-temperature roasting was used in the preparation process, which greatly damaged the acidity of the carrier, especially the damage to the strong acid center, which greatly weakened the hydrogenation conversion capacity of the catalyst. Acid Catalyst Support

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Weigh SiO 2 300 grams of silica-alumina dry rubber powder with a content of 9.0w% (containing 75 grams of water), and then weighed 15 grams of carbon black with a particle size of 30 microns and 10 grams of extrusion aid squash powder, and mixed them evenly. Dissolve 8.5g of boric acid in 100mL of 70°C water, then add 6.0g of 85% phosphoric acid, add the above-mentioned boric acid mixed solution to the silica-alumina dry rubber powder, knead evenly, knead into a plastic body, and extrude it into a strip of 0.9mm on the extruder , dried at 110°C for 4 hours, and then fired at 830°C for 2 hours.

Embodiment 2

[0025] In Example 1, the silica-alumina dry rubber powder was replaced with pseudo-boehmite (alumina content 78w%). Dissolve 15g of boric acid in 150mL of 75°C water, add the above-mentioned boric acid solution into silica-alumina dry rubber powder, knead evenly, then add 10 grams of 1:1 HAC, knead into a plastic body, and the others are the same as in Example 1, namely the cost example.

Embodiment 3

[0027] In embodiment 1, boric acid is changed into 17.0 grams, and boric acid solution is 80 ℃, and phosphoric acid is changed into nitric acid 8.0 grams and is cost example.

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PUM

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Abstract

The invention discloses a micro-porous alumina carrier and relative preparing method, which contains boric oxide and another agent selected from phosphor, silicon, zirconium, and titanium. The invention adds the boric acid into water or peptizate acid whose temperature is higher than room temperature, then adds the mixture of alumina leading material and physics expanding-hole agent to be molded, dried, and burnt to attain the final carrier. The inventive carrier contains a proper agent, with the characters of large aperture, centralized distribution hole and a certain acid. And its surface acid and aperture can be adjusted easily. Therefore, the invention can overcome the defects of present technique which can not have aforementioned characters at the same time. The inventive alumina carrier can be used in variable hydrogenation catalyst.

Description

technical field [0001] The invention relates to a macroporous alumina carrier and a preparation method thereof, in particular to a macroporous alumina carrier with concentrated pore distribution and certain acidity and a preparation method thereof. Background technique [0002] The performance of a supported catalyst often depends on its carrier, because the carrier determines the dispersion state of the active metal in the catalyst, the acidity of the catalyst, the mass transfer process in the catalyst particles, and the strength of the catalyst. Hydrogenation catalyst is a typical type of supported catalyst. Its typical carrier, alumina (or alumina with auxiliary agent) can promote the dispersion of active metals. It has been proved by a large number of experiments. The mechanical The strength can also meet the needs of industrial operations. Therefore, for different raw materials and different processing purposes, people naturally focus on the strength of its acidic prope...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J32/00B01J21/02B01J37/00C04B38/00C10G45/04
Inventor 张皓苏晓波袁胜华段日
Owner CHINA PETROLEUM & CHEM CORP
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