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Direct forming method of methanol-to-propylene catalyst

A methanol-to-propylene and molding method technology, which is applied in the direction of molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of cumbersome production process and high cost of MTP catalysts, so as to improve market competitiveness and simplify production process, the effect of reducing emissions

Pending Publication Date: 2020-11-13
JIANGSU TIANNUO NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention fundamentally solves the technical shortcomings of cumbersome production process and high cost of MTP catalyst

Method used

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  • Direct forming method of methanol-to-propylene catalyst
  • Direct forming method of methanol-to-propylene catalyst
  • Direct forming method of methanol-to-propylene catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] With 30% silica sol as silicon source, aluminum sulfate as aluminum source, sodium hydroxide as alkali source, TPABr is selected as template agent, according to Al2O3: SiO2: template agent: Na2O: H2O=1:300:60:20:3000 The gel was prepared by proportioning, and then loaded into a stainless steel autoclave, crystallized at 100°C for 24 hours, and crystallized at 160°C for 36 hours to obtain a ZSM-5 molecular sieve slurry.

[0031] A small amount of molecular sieve slurry was taken for centrifugation, and the solid product was washed and dried for XRD analysis. The result showed that the synthesized product was ZSM-5 molecular sieve.

Embodiment 2

[0032] Embodiment 2 (preparation of catalyst)

[0033] Get appropriate amount of ZSM-5 molecular sieve plate and frame filter sample 450g, 120g pseudo-boehmite powder and 6.75g of scallop powder obtained in Example 1 and fully mix them in a mixer to obtain mixture A. Mix 7g polyethylene glycol, 13.5 Add 10 g of nitric acid (10%) into 10 g of water, stir continuously until a clear and transparent liquid is obtained to reach solution B, slowly add solution B to A under stirring conditions, knead the material into a wet plastic state, and then extrude into a strip. Drying at 120°C for 12h, calcining at 550°C for 6h, and exchanging twice with 0.1mol / L ammonium chloride solution at 60°C for 2h each time, washing, drying, and calcining at 550°C for 4h to obtain the MTP catalyst. The product is still ZSM-5 molecular sieve through X-ray diffraction analysis, and the crystallinity is 70.5% (the original powder of ZSM-5 molecular sieve is 100%). figure 1 The XRD spectrum of the prepare...

Embodiment 3

[0037]Get appropriate amount of ZSM-5 molecular sieve plate and frame filter sample 450g, 100g pseudo-boehmite powder and 6.75g of scallop powder obtained in Example 1 and fully mix them in a mixer to obtain mixture A. Mix 7g polyethylene glycol, 13.5 Add 10 g of nitric acid (10%) into 10 g of water, stir continuously until a clear and transparent liquid is obtained to reach solution B, slowly add solution B to A under stirring conditions, knead the material into a wet plastic state, and then extrude into a strip. Drying at 120°C for 12h, calcining at 550°C for 6h, and exchanging twice with 0.1mol / L ammonium chloride solution at 60°C for 2h each time, washing, drying, and calcining at 550°C for 4h to obtain the MTP catalyst. After X-ray analysis, the product is mainly ZSM-5 molecular sieve with a crystallinity of 67.7%. The specific surface area measured by nitrogen isothermal adsorption is 369.9m2 / g, the mesopore volume is 0.22ml / g, and the strength is 205.5N / cm. Propylene fi...

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Abstract

The invention discloses a forming method of a methanol-to-propylene catalyst. The method comprises the following steps: (1) filtering molecular sieve crystallization slurry to obtain a product; (2) mixing and kneading the molecular sieve filtration product obtained in the step (1), a peptizing agent, an adhesive, an extrusion aid and water according to a certain ratio to form a plastomer, and carrying out extrusion molding to obtain a solid product with a specific shape; and (3) carrying out drying, roasting, ion exchange and other steps on the solid product obtained in the step (2) to obtainthe final product, namely the methanol-to-propylene catalyst. According to the method, the crystallization product obtained after molecular sieve filtration is directly mixed with auxiliary agents tocomplete catalyst molding, the use of molecular sieve raw powder as a molding raw material in the traditional methanol-to-propylene catalyst molding process is abandoned, the production process is simplified, the filtrate is recycled as the adhesive, the discharge amount of organic ammonia-nitrogen wastewater is reduced, and the production cost is reduced. The market competitiveness of the domestic catalyst is improved, and the domestic blank of the methanol-to-propylene catalyst production technology is filled.

Description

technical field [0001] The invention belongs to the technical field of chemical catalysts, and in particular relates to a direct molding method of a methanol-to-propylene catalyst. Background technique [0002] Propylene is one of the most important petrochemical basic raw materials next to ethylene, and it is widely used. The key technology of the methanol-to-propylene (MTP) process is the MTP catalyst technology, which is also the difficulty of research and the focus of industry attention. Mastering the catalyst technology is the core of the process. ZSM-5 is the catalytic material with the best activity and stability in the conversion of methanol to propylene. In order to achieve the purpose of industrial application, molecular sieves often need to be mixed with other additives and formed into a specific shape and a certain strength. solid product. [0003] Industrial applications require that the molded product has a certain mechanical strength, and can retain the orig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/40B01J35/10C07C11/06C07C1/20
CPCB01J29/40C07C1/20B01J35/633B01J35/615C07C11/06Y02P20/52
Inventor 孙先勇柴志波张伟赵琦
Owner JIANGSU TIANNUO NEW MATERIAL TECH