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Forming method for spherical particles of molecular sieve catalyst

A technology of spherical particles and molding methods, applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as low molecular sieve content, poor crushing strength, and difficulty in extrusion molding

Active Publication Date: 2014-07-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] For ZSM-5 silicon-aluminum molecular sieves with high silicon-aluminum ratio, even especially pure silicon S-1 and titanium-silicon TS-1 molecular sieves without aluminum, which also have MFI structure, it is very difficult to extrude into strips. Catalyst, its crushing strength is also very poor, and the molecular sieve content is low, it is difficult to exceed 90%

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] This example illustrates the method provided by the invention.

[0024] (1) 2 kg of ZRP-1 with a silicon-aluminum ratio of 40 (silicon-aluminum molecular sieve with MFI structure, produced by Hunan Jianchang Petrochemical Co., Ltd., a commercial brand, with a molecular sieve solid content of 85%, the same below) is crushed into 200-400 mesh , placed in a turntable molding machine, spraying 1.5kg of deionized water into it to obtain spherical particles with a diameter of about 0.2 to 0.8mm, wherein the diameter of the turntable of the turntable rotary molding machine used is 1.2m, the depth of the turntable is 450mm, and the inclination angle of the turntable is It is determined to be 47°, and the rotation speed of the turntable is set to 23rpm;

[0025] (2) Add the above-mentioned 400-800 mesh ZRP-1 and water to the turntable forming machine at a uniform speed, the molecular sieve amount is about 80kg, the water amount is about 62kg, and the addition is completed in 30 ...

Embodiment 2

[0028] This example illustrates the method provided by the invention.

[0029] (1) 2 kg of ZRP-1 with a silicon-aluminum ratio of 40 (silicon-aluminum molecular sieve with MFI structure, produced by Hunan Jianchang Petrochemical Co., Ltd., a commercial brand, with a molecular sieve solid content of 85%, the same below) is crushed into 200-400 mesh , put it in a turntable molding machine, spray 1.5kg of deionized water into it, and obtain spherical particles with a diameter of about 0.2 to 0.8mm. Among them, the diameter of the turntable of the turntable turntable molding machine used is 1.0m, the depth of the turntable is 125mm, and the inclination angle of the turntable is It is determined to be 47°, and the rotating speed of the turntable is set to 25rpm.

[0030] (2) Add 80kg of ZRP-1 molecular sieve of 400-800 mesh and 50kg of 30% aluminum sol to the turntable molding machine at a uniform speed, and finish adding within 120 minutes; sieve with 13-mesh and 10-mesh sieves to...

Embodiment 3

[0033] This example illustrates the method provided by the invention.

[0034] This example illustrates the process of forming spherical particles of MFI-structured titanium-silicon molecular sieve catalysts.

[0035] Process for preparing spherical particles of aluminum-free MFI-structured titanium-silicon molecular sieves.

[0036] (1) Crush 2kg of HTS-1 (aluminum-free TS-1 molecular sieve with MFI structure, produced by Hunan Jianchang Petrochemical Co., Ltd., a commercial brand, with a molecular sieve solid content of about 85%) into 200-500 meshes, and place in In the turntable forming machine, the turntable diameter of the turntable rotary forming machine used is 1.2m, the depth of the turntable is 450mm, the inclination angle of the turntable is determined to be 46°, and the rotation speed of the turntable is set at 28rpm. Spray about 1.5 kg of deionized water therein to obtain spherical particles with a diameter of about 0.2 to 0.6 mm.

[0037] (2) Separately crush t...

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Abstract

The invention relates to a forming method for spherical particles of a molecular sieve catalyst. The method is characterized by including, under the rotating operation conditions of a turntable forming machine, (1) placing a molecular sieve raw material with a size of 200-500 meshes in the turntable forming machine to undergo mixing contact with water and / or a binder, thus obtaining spherical particles with a diameter of 0.1-1mm; (2) then adding a molecular sieve raw material with a size of 100-1000 meshes and a binder to obtain a spherical catalyst with a diameter of 1.5-2.5mm; and (3) drying and roasting the spherical catalyst. Specifically, the molecular sieve raw materials in step (1) and step (2) are in a weight ratio of 1:10-100, and the binder in step (2) accounts for 0.1-50% of the weight of the molecular sieve raw material with a size of 100-1000 meshes. The spherical catalyst obtained by the invention can have crushing strength up to 1.0-5.0kg / particle.

Description

technical field [0001] The invention relates to a method for forming molecular sieve catalysts, more specifically, the invention relates to a method for forming spherical particles of molecular sieve catalysts. Background technique [0002] Catalyst shaping is one of the key steps in the industrial production process of catalysts. Due to the different catalyst molding methods and processes, the pore structure, specific surface area and surface texture structure of the prepared catalysts are also significantly different, resulting in different use effects. [0003] For solid catalysts used in gas-solid reactions, molding operations are usually a necessary step. Therefore, molding is regarded as one of the important contents to improve catalyst performance at home and abroad. There are many types of molding methods, each with its own characteristics and uses. Through molding and processing, the catalyst can provide a granular catalyst suitable for the current situation, size...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J35/08B01J29/035B01J29/89
Inventor 程时标涂椿滟张树忠谢丽慕旭宏
Owner CHINA PETROLEUM & CHEM CORP