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Continuous powder humidifying and forming equipment, application method and catalyst carrier preparation method

A molding equipment and powder technology, applied in the direction of catalyst carrier, catalyst activation/preparation, auxiliary molding equipment, etc., can solve the problems of affecting the microporous structure of the catalyst carrier, low production efficiency, long humidification time, etc., to shorten the process and Preparation time, improve production efficiency, good moisturizing effect

Pending 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

[0004] In order to complete the humidification and acidification process of alumina powder, the powder and liquid are generally added to the roller compactor at the same time, rolled and rolled for a certain period of time, and then kneaded by the subsequent kneader for 30 to 90 minutes. The material is fed into the extrusion molding machine and formed into a catalyst carrier by extrusion to realize the process of mixing, humidifying and forming the raw materials. The whole process takes a long time and the production efficiency is low, which affects the microporous structure of the catalyst carrier.
[0005] CN1331604A discloses a hydrogenation catalyst carrier and a preparation method thereof. In the method, amorphous silica-alumina, modified β molecular sieve, and macroporous alumina are put into a roller compactor, mixed and rolled for 30 minutes, and then a binder is added. Rolling for 30 minutes, then add water, continue rolling until the paste can be extruded, extruded, and then roasted to obtain a hydrogenation catalyst carrier, this technology takes a long time to humidify
In the current preparation process of the hydrogenation catalyst carrier, a rolling machine or rolling machine, kneader, and extruding machine are generally used to complete the process of humidifying, acidifying, and forming the alumina powder, which generally takes 60 to 90 minutes.
After the rolling machine works for a certain period of time, part of the humidified alumina powder adheres to the inner wall of the rolling machine. At this time, it needs to be removed manually in time. The acidified powder that falls off and is mixed in normal rolling is prepared into a catalyst carrier together, which affects the internal pore structure, acidity and catalyst performance of the carrier

Method used

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  • Continuous powder humidifying and forming equipment, application method and catalyst carrier preparation method
  • Continuous powder humidifying and forming equipment, application method and catalyst carrier preparation method
  • Continuous powder humidifying and forming equipment, application method and catalyst carrier preparation method

Examples

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preparation example Construction

[0075] In a third aspect, the present invention provides a method for preparing a catalyst carrier, which adopts the above-mentioned powder continuous humidification molding method, wherein the powder material is kaolin and / or pseudo-boehmite, and the liquid material is molecular sieve slurry , aluminum sol, inorganic acid solution and deionized water at least one.

[0076] Wherein, the humidification mass ratio of the powder material to the liquid material is: 1:0.01-3, and the acid content in the liquid is 0.01-20 mol / L.

[0077] The catalyst carrier preparation method provided by the present invention realizes the whole process from rapid mixing and humidification of alumina powder and liquid to extrusion molding, and eliminates the problems of sticking to the wall and difficult discharge of alumina after humidification, making alumina Having the same acidification time ensures that the molded catalyst carrier has the same pore volume as the alumina, and also improves the c...

Embodiment 1

[0099] Example 1 illustrates: the effect of using the powder continuous humidification molding provided by the present invention to prepare the catalyst carrier, and the uniformity of the catalyst carrier, the catalyst pore volume, the specific surface and the preparation time of the catalyst are analyzed.

[0100] Powder material A is a mixture of alumina powder and squash powder at a mass ratio of 80:1; liquid B is 4.2% HNO 3 Acid solution (density 1.02g / mL). Humidify the powder material A into a wet powder with a moisture content of 45% and an acid content of 0.33mmol / g. The humidified powder is extruded into a column, dried at 120°C for 2 hours, and roasted at a constant temperature of 580° After 4 hours, the catalyst carrier was obtained.

[0101] Use as attached figure 1 The shown powder continuous humidification molding equipment prepares the catalyst carrier. The powder meter 2 uses two sets of rotary valves for metering (respectively measuring alumina and sage powd...

Embodiment 2

[0129] Using the continuous humidification molding equipment in Example 1, the powder materials are pseudo-boehmite and scallop powder from Shandong Aluminum Plant, and the liquid material B is 5.7% HNO 3 Acid solution (density 1.03g / mL), humidification is pseudo-boehmite wet powder with a moisture content of 45% and an acid content of 0.32mmol / g. The powder after humidification is extruded into a columnar shape. It was dried at ℃ for 2 hours, and then calcined at a constant temperature of 580° for 4 hours to obtain a catalyst carrier.

[0130] Prepare 85L5.7%HNO according to the moisture content requirements of the mixed materials 3 The solution is loaded into 7-1. The mass addition ratio of powdered pseudo-boehmite powder and safflower powder is 75:1 (the mass flow rate of powdered pseudo-boehmite is 174.87kg / h, and the mass of safflower powder is 2.33kg / h); powder: liquid mass ratio Mix according to the method of 4.14:1, the yield of mixed wet material is 220.0kg / h, the c...

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Abstract

The invention discloses continuous powder humidifying and forming equipment, an application method and a catalyst carrier preparation method, and the continuous powder humidifying and forming equipment comprises a powder humidifying and mixing machine, a wet material driving machine and an extrusion forming machine which are communicated in sequence, the wet material driving machine comprises a material driving chamber, a lower rotating shaft in the center of the material driving chamber and a material driving scraper connected with the lower rotating shaft, and the outer edge of the material driving scraper is matched with the inner wall of the material driving chamber. The continuous powder humidifying and forming equipment provided by the invention is suitable for forming viscous materials after liquid-solid mixing. The method is especially suitable for the process of preparing a catalyst carrier by mixing alumina powder and liquid acid. The rapid mixing, humidifying and extrusion molding process of the aluminum oxide powder and the liquid acid is realized, the molding flow and preparation time of the catalyst are shortened, and the production efficiency of the catalyst is improved.

Description

technical field [0001] The invention relates to a chemical mixing equipment and an application method, more specifically, to an alumina powder continuous humidification mixing equipment and an application method. Background technique [0002] Catalyst is the core technology of modern chemical industry. Alumina is a powder material with special pore structure and acidity. It is widely processed into catalyst carrier in oil refining, chemical industry, environmental protection, automobile exhaust treatment and other industries. [0003] In the process of preparing alumina powder into a catalyst carrier, it is necessary to humidify and acidify the powder into a uniform wet powder to increase the shaping effect of the catalyst carrier, and sometimes humidify and acidify it into a paste to increase its bonding performance . [0004] In order to complete the humidification and acidification process of alumina powder, the powder and liquid are generally added to the roller compact...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J32/00B01J21/04B01J37/04B01J37/08B28B15/00B28B3/22B28B17/02B28B13/02B28C3/00
CPCB01J21/04B01J37/04B01J37/08B01J37/0018B28B15/00B28B3/224B28B17/026B28B13/0275B28C3/00
Inventor 田志鸿李学锋何金龙张翊刘亚林甄栋兴
Owner CHINA PETROLEUM & CHEM CORP
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