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Aluminium oxide carrier with composite holes structure and preparation method thereof

An alumina carrier and composite pore technology, applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., to achieve excellent resistance to high free water, high hydrogenation activity, and excellent resistance to high colloids. Effect

Active Publication Date: 2008-02-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The second technical problem to be solved by the present invention is that the prior art does not involve the preparation method of macroporous alumina carriers with different pore distributions of 20 nanometers or more, and a new method for preparing alumina carriers with a composite pore structure is provided.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Take by weighing 300 grams of pseudo-boehmite, 30 grams of δ-alumina, 9 grams of turnip powder, 18 grams of polyvinyl alcohol solution (5% in mass concentration), 4.0 grams of nitric acid, mix, and extrude into a clover of φ 2.5 mm , the wet strip was dried at 100°C for 2 hours and then calcined at 900°C for 8 hours to obtain carrier Z1. The specific surface, pore volume, probable pore diameter and pore distribution of Z1 were measured by mercury intrusion porosimetry, and the results are shown in Table 1.

Embodiment 2

[0022] Weigh 300 grams of pseudo-boehmite, 150 grams of α-alumina, 12 grams of scallop powder, 30 grams of polyvinyl alcohol solution (mass concentration is 5%), 6.0 grams of acetic acid, mix, extrude into clover of φ 2.5 mm , the wet strip was dried at 50°C for 24 hours and then calcined at 1000°C for 4 hours to obtain carrier Z2. The specific surface, pore volume, probable pore diameter and pore distribution of Z2 were measured by mercury intrusion porosimetry, and the results are shown in Table 1.

Embodiment 3

[0024] Take by weighing 200 grams of pseudo-boehmite, 200 grams of θ alumina, 12 grams of asparagus powder, 25 grams of polyvinyl alcohol solution (mass concentration is 5%), 4.0 grams of nitric acid, and 34 grams of aluminum sol are mixed and extruded into φ2. 5 mm clover, wet strips were dried at 80°C for 6 hours and then calcined at 1100°C for 2 hours to obtain carrier Z3. The specific surface, pore volume, probable pore diameter and pore distribution of Z3 were measured by mercury intrusion porosimetry, and the results are shown in Table 1.

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PUM

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Abstract

The invention relates to an alumina carrier with a composite pore structure and a preparation method thereof. The method mainly solves the technical problem that it is difficult to obtain macroporous alumina carriers with different pore distributions above 20 nanometers and the preparation method thereof in the prior art. In the present invention, the specific surface area of ​​the alumina carrier is 40-160 m2 / g, the total pore volume is 0.3-1.2 ml / g, and the pore volume with a pore diameter of less than 30 nanometers accounts for 5-60% of the total pore volume. The pore volume of 30 to 60 nanometers accounts for 20 to 75% of the total pore volume, and the pore volume with a pore diameter > 60 nanometers accounts for 20 to 60% of the total pore volume as a composite carrier; the preparation method of the composite carrier adopts firstly alumina A Mixing with alumina B, molding, drying at 50-100°C for 1-24 hours, and then roasting at 800-1150°C for 1-10 hours to obtain a technical solution to the composite carrier solves this problem well, and can be used for pyrolysis gasoline In the industrial production of hydrogen catalysts.

Description

technical field [0001] The invention relates to an alumina carrier with a composite pore structure and a preparation method thereof. More specifically, it relates to an alumina support for hydrocatalytic reaction including pyrolysis gasoline hydrogenation reaction and hydrotreating and its preparation method. Background technique [0002] In the process of hydrocarbon processing, alumina support is widely used because of its large specific surface area and high stability. However, in hydrogenation reactions such as full-run cracking of gasoline to remove olefinic impurities in gasoline, because it is rich in C 5 、C 9 + (Carbon nine and above) unsaturated components, high in diene, easy to polymerize, high in colloids (polymers produced by polymerization of unsaturated components such as dienes and styrene), high in heavy components, and coke powder High content, poor stability, and due to the formation of azeotrope or the lack of effective oil-water separation means in i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/04C10G45/04
Inventor 刘仲能江兴华吴晓玲侯闽渤宗弘元
Owner CHINA PETROLEUM & CHEM CORP
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