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Preparation method of catalyst for catalyzing and cracking naphtha to prepare propylene

A catalytic cracking and naphtha technology, applied in the direction of carbon compound catalysts, physical/chemical process catalysts, catalysts, etc., can solve the problem of low propylene yield and achieve high propylene yield

Inactive Publication Date: 2018-07-13
北京燧火科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem actually solved by the present invention is: to solve the problem of low yield of propylene in the existing naphtha cracking process, the key technical means adopted is to load perrhenic acid and four Butyl ammonium perrhenate to improve the selectivity of naphtha cracking to propylene

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A preparation method of a catalyst for producing propylene by catalytic cracking of naphtha, comprising the steps of:

[0021] (1) Prepare EU-1 / ZSM-5 composite molecular sieve by hydrothermal synthesis method, weigh appropriate amount of TPAOH, TPABr and distilled water, stir evenly, then add EU-1 molecular sieve, stir evenly, finally add silica sol, fully stir evenly Then put it into a synthesis kettle, and obtain a hydrogen-type EU-1 / ZSM-5 composite molecular sieve through crystallization, filtration, washing, drying, roasting, and ammonium exchange. The crystallization temperature is 150°C, the crystallization time is 40h, and the roasting temperature is 650°C. ℃, calcination time 3h, Si / Al molar ratio in the composite molecular sieve is 150;

[0022] (2) Add γ-Al 2 o 3 , mix evenly, add an appropriate amount of safflower powder and a dilute nitric acid solution with a concentration of 10%, knead and extrude into a strip, dry at 110°C for 1 hour, and roast at 560°C...

Embodiment 2

[0025] A preparation method of a catalyst for producing propylene by catalytic cracking of naphtha, comprising the steps of:

[0026] (1) Prepare EU-1 / ZSM-5 composite molecular sieve by hydrothermal synthesis method, weigh appropriate amount of TPAOH, TPABr and distilled water, stir evenly, then add EU-1 molecular sieve, stir evenly, finally add silica sol, fully stir evenly Then put it into a synthesis kettle, and obtain a hydrogen-type EU-1 / ZSM-5 composite molecular sieve through crystallization, filtration, washing, drying, calcination, and ammonium exchange. The crystallization temperature is 100°C, the crystallization time is 30h, and the calcination temperature is 400°C ℃, calcination time 5h, Si / Al molar ratio in the composite molecular sieve is 50;

[0027] (2) Add γ-Al 2 o 3 , mix evenly, add an appropriate amount of scallop powder and a dilute nitric acid solution with a concentration of 10%, knead and extrude into a strip, dry at 120°C for 2 hours, and roast at 52...

Embodiment 3

[0030] A preparation method of a catalyst for producing propylene by catalytic cracking of naphtha, comprising the steps of:

[0031] (1) Prepare EU-1 / ZSM-5 composite molecular sieve by hydrothermal synthesis method, weigh appropriate amount of TPAOH, TPABr and distilled water, stir evenly, then add EU-1 molecular sieve, stir evenly, finally add silica sol, fully stir evenly Then put it into a synthesis kettle, and obtain a hydrogen-type EU-1 / ZSM-5 composite molecular sieve through crystallization, filtration, washing, drying, roasting, and ammonium exchange. The crystallization temperature is 140°C, the crystallization time is 60h, and the roasting temperature is 500°C ℃, calcination time 8h, Si / Al molar ratio in the composite molecular sieve is 300;

[0032] (2) Add γ-Al 2 o 3 , mix evenly, add an appropriate amount of kale powder and a dilute nitric acid solution with a concentration of 10%, knead and extrude into a strip, dry at 100°C for 3 hours, and roast at 550°C for ...

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Abstract

The invention discloses a preparation method of a catalyst for catalyzing and cracking naphtha to prepare propylene. The preparation method comprises the following steps of firstly, using a hydrothermal synthesis method to prepare an EU-1 / ZSM-5 composite molecular sieve; then, adding gamma-Al2O3 (aluminum oxide), uniformly mixing, forming, and loading perrhenic acid and tetrabutylammonium perrhenate by an impregnating method, so as to obtain the catalyst for catalyzing and cracking naphtha to prepare propylene. The prepared catalyst for catalyzing and cracking naphtha to prepare propylene canbe used for catalyzing and cracking the naphtha to obtain more propylene products. In the preferable implementing type, the amount of ethylene, propylene and butane is equal to 94% or above of the total weight of cracked product, and the yield rate of the propylene is high.

Description

technical field [0001] The invention belongs to the technical field of catalytic cracking of naphtha, and in particular relates to a preparation method of a catalyst for producing propylene by catalytic cracking of naphtha. Background technique [0002] Since the beginning of the new century, the world’s demand for petrochemical raw materials and petrochemical products will continue to grow, and the demand for ethylene and propylene, which are the basic petrochemical raw materials, will continue to grow. However, the production capacity of conventional steam pyrolysis technology cannot meet the rapidly growing demand for propylene. Furnace steam pyrolysis is a process that consumes a lot of energy, and the process conditions are harsh. Compared with steam pyrolysis, the reaction temperature of naphtha catalytic cracking is about 50°C~200°C lower than that of standard cracking reaction. Therefore, it consumes less energy than ordinary steam pyrolysis, and the coking rate of t...

Claims

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Application Information

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IPC IPC(8): B01J29/80C07C4/06C07C11/04C07C11/06C07C11/08
CPCB01J29/48B01J29/7846B01J29/80B01J2229/18C07C4/06C07C2529/80C07C11/04C07C11/06C07C11/08Y02P20/52
Inventor 彭杰
Owner 北京燧火科技有限公司
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