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Preparation method of macroporous alumina carrier

A technology of macroporous alumina and alumina powder, which is applied to catalyst carriers, chemical instruments and methods, alkali metal oxides/hydroxides, etc., can solve the complex process of styrene-butadiene rubber emulsion, high cost, and pore-enlarging effect. Not obvious and other problems, to achieve the effect of changing the grain size, improving the pore structure, and increasing the content of macropores

Active Publication Date: 2022-05-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The alumina carrier prepared by this method has a double pore distribution, and the two pore structures are respectively provided by pseudo-boehmite prepared by two or more different raw material routes. No pore-enlarging agent is used in the preparation process, and the pore structure of the carrier is restricted. Due to the properties of pseudo-boehmite, the hole expansion effect is not obvious
[0005] CN107913691A discloses a macropore-containing alumina carrier and a preparation method thereof. The method uses styrene-butadiene rubber emulsion as a pore-enlarging agent to adjust the pore structure of the alumina carrier. The process for preparing the styrene-butadiene rubber emulsion is complicated and the cost is high

Method used

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  • Preparation method of macroporous alumina carrier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Weigh an appropriate amount of pseudo-boehmite A1 and pseudo-boehmite B, control the molar ratio of pseudo-boehmite A1 and pseudo-boehmite B to 1:1.5, mix the above materials evenly, and then add them to the mixture Add an appropriate amount of ammonium chloride, control the molar ratio of ammonium ions and aluminum elements to 1:12, mix the above materials evenly, and then place them in a high-temperature furnace and roast at 750°C for 6 hours to obtain alumina powder C1.

[0033] Weigh an appropriate amount of alumina powder C1 and pseudo-boehmite D, control the molar ratio of pseudo-boehmite D and alumina powder C1 to 1:5, then add an appropriate amount of kale powder to the above materials and mix evenly, Add an appropriate amount of nitric acid aqueous solution with a mass concentration of 1.5% to the mixture, knead it evenly, extrude it, dry the molded product at 120°C for 4 hours, and then bake it at 600°C for 4 hours to obtain alumina carrier S1. The properties o...

Embodiment 2

[0035] Same as Example 1, except that the molar ratio of pseudo-boehmite A1 to pseudo-boehmite B is 1:2.5, the molar ratio of ammonium ion to aluminum element is 1:8, and the powder roasting temperature is 700°C. The molar ratio of boehmite D to alumina powder is 1:5.5 to prepare alumina carrier S2. The properties of the carrier are shown in Table 1.

Embodiment 3

[0037] Same as Example 1, except that the molar ratio of pseudo-boehmite A1 to pseudo-boehmite B is 1:2, the molar ratio of ammonium ion to aluminum element is 1:16, and the powder roasting temperature is 800°C. The molar ratio of boehmite D to alumina powder is 1:4.5, and the alumina carrier S3 is prepared. The properties of the carrier are shown in Table 1.

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Abstract

The invention discloses a preparation method of a macroporous alumina carrier. The preparation method comprises the following steps: (1) uniformly mixing a proper amount of pseudo-boehmite powder A and a proper amount of pseudo-boehmite powder B; (2) adding a proper amount of ammonium chloride into the mixed material in the step (1), uniformly mixing, and roasting to obtain aluminum oxide powder C; (3) uniformly mixing a proper amount of pseudo-boehmite D with the aluminum oxide powder C obtained in the step (2), then adding a peptizing agent and an extrusion aid, uniformly mixing and kneading, and carrying out extrusion molding; and (4) drying and roasting the strip-shaped material in the step (3) to obtain the macroporous alumina carrier. The method is simple in process and easy for industrial production, and the prepared alumina carrier has high pore volume and high pore content of 10-20 nm and 20-60 nm.

Description

technical field [0001] The invention relates to the field of preparation of inorganic materials, in particular to a preparation method of a macroporous alumina carrier. Background technique [0002] With the increase of heavy and inferior crude oil and the change of market demand structure for light oil, the processing technology of inferior heavy oil (including various heavy oil and residual oil, etc.) has become the research focus of major oil companies and petroleum scientific research institutions direction. Residual oil fixed-bed hydrogenation technology is an effective means to achieve high-efficiency conversion of heavy oil. Residual oil contains a large number of impurities, which mainly exist in the form of macromolecular micelles such as colloids and asphaltenes. difficulty. The traditional small-pore alumina can no longer meet the production requirements, and it is necessary to develop a carrier material with a reasonable pore distribution that can effectively i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/442B01J21/04B01J35/10B01J32/00B01J20/08B01J20/28B01J20/30
CPCC01F7/442B01J21/04B01J20/08B01J20/28061B01J20/28073B01J20/28092B01J20/28083B01J20/28085B01J20/3064B01J20/3078C01P2006/12C01P2006/14C01P2006/17C01P2006/16B01J2220/4806B01J35/615B01J35/635B01J35/651B01J35/69B01J35/647Y02P20/52
Inventor 季洪海王少军凌凤香袁胜华谷明镝
Owner CHINA PETROLEUM & CHEM CORP
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