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Preparation method of hydrocarbon conversion catalyst carrier

A catalyst carrier, hydrocarbon conversion technology, applied in catalyst carriers, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem of difficulty in obtaining carriers with large pore volume and specific surface area, etc.

Active Publication Date: 2016-06-01
四川蜀泰化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional preparation methods for hydrocarbon conversion catalysts are difficult to obtain supports with large pore volume and specific surface area

Method used

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  • Preparation method of hydrocarbon conversion catalyst carrier

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A novel method for preparing a hydrocarbon conversion catalyst support, using pseudo-boehmite as the initial material and adding the auxiliary agent TiO 2 , the binder sodium carboxymethyl cellulose (CMC) and calcium carbonate are prepared by ball milling, water mixing, steam treatment and calcination. After the ball-milled mixture is steam-treated and dried, it is first calcined to 350°C, at this time, the water in the pseudo-boehmite evaporates, and large pores are opened, with a pore size of 150nm. Then calcined to 750°C, the calcium carbonate additive decomposes, and small pores are opened in the large pores with a pore diameter of 50nm to make a carrier with large pore volume and specific surface area. Finally, the calcination temperature rises to 1200°C to complete Al 2 o 3 The crystallization was carried out to obtain the final carrier. The catalyst carrier adopts the technology of opening holes in the pores to obtain the catalyst carrier, the pore volume is 0...

Embodiment 2

[0039] A novel method for preparing a catalyst carrier for hydrocarbon conversion, using pseudo-boehmite as the initial material and adding the auxiliary agent WO 3, Sodium polyethoxide (PVA) and magnesium carbonate are prepared by ball milling, water mixing, steam treatment and calcination. After the steam treatment and drying of the ball mill mixture, it is first calcined to 460°C, and at this time, the pseudo-boehmite has large pores with a pore diameter of 560nm. Then calcined to 800°C, the carbonate additive decomposes, and small pores are opened in the large pores with a pore diameter of 78nm to make a carrier with large pore volume and specific surface area. Finally, the calcination temperature rises to 1150°C to complete Al 2 o 3 The crystallization was carried out to obtain the final carrier. The measured pore volume is 0.30mL / g, and the specific surface area is 13m 2 / g, the bulk density of the carrier is 0.65kg / L.

Embodiment 3

[0041] A novel preparation method of hydrocarbon conversion catalyst carrier, using pseudo-boehmite as the initial material, adding additive MoO 3 , Methyl cellulose (MC) and strontium carbonate are prepared by ball milling, water mixing, steam treatment and calcination. After the steam treatment and drying of the ball mill mixture, it is first calcined to 650°C, at this time, the pseudo-boehmite has large pores with a diameter of 100nm. Then calcined to 900°C, the carbonate additive decomposes, and small pores are opened in the large pores with a pore diameter of 500nm to make a carrier with large pore volume and specific surface area. Finally, the calcination temperature rises to 1350°C to complete Al 2 o 3 The crystallization was carried out to obtain the final carrier. The measured pore volume is 0.45mL / g, and the specific surface area is 20m 2 / g, the bulk density of the carrier is 0.635kg / L.

[0042] The catalyst carrier adopts the technology of opening holes in the...

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Abstract

The invention discloses a preparation method of a hydrocarbon conversion catalyst carrier. The preparation method of the hydrocarbon conversion catalyst carrier comprises the steps: taking pseudo-boehmite AlOOH.nH2O as an initial material, adding a first auxiliary agent and a proper amount of a nitric acid solution, and carrying out ball-milling material mixing, water mixing and molding, steam treatment and calcining procedures to obtain the carrier, wherein during the ball-milling material mixing process, a second auxiliary agent and a bonding agent are also added, the second auxiliary agent is MgCO3, CaCO3, SrCO3 or BaCO3, and the binding agent is sodium carboxymethyl cellulose (CMC), carboxyl methyl cellulose, methyl cellulose (MC) or poly sodium ethoxide (PVA). With a technology of opening pores in pores in the preparation method of the catalyst carrier, the obtained catalyst carrier has high pore volume of 0.25-0.45 mL / g and large specific surface area of 5-20 m<2> / g. At the same time, the bulk density of the carrier is lower than that of a carrier obtained by an ordinary process.

Description

technical field [0001] The invention relates to a method for preparing a hydrocarbon conversion catalyst carrier. Background technique [0002] The composition of hydrocarbons, especially higher hydrocarbons, is complex, including various alkanes, cycloalkanes and aromatics. During the conversion process, on the one hand, these hydrocarbons undergo catalytic cracking reactions and thermal cracking reactions; on the other hand, hydrocarbons and their intermediate products undergo catalytic conversion reactions with water vapor. The cracked products are steam reformed to form hydrogen and carbon oxides, hydrogenated to form methane, polymerized, dehydrogenated and further cracked to form char. Therefore, the hydrocarbon steam reforming process is a complex system including cracking, steam reforming, methanation, hydrogenation, dehydrogenation, carbon oxide shifting and other reactions, and finally reaches the balance between methanation reaction and CO shifting reaction. The...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J32/00B01J35/10B01J23/02B01J23/30B01J23/28C07C9/04C07C1/04C07C1/12
Inventor 许云波李华波李文静严会成王灵翼吴小强
Owner 四川蜀泰化工科技有限公司
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