Catalyst for producing propylene by catalytic pyrolysis and preparation method thereof

A catalytic cracking and catalyst technology, applied in the direction of physical/chemical process catalysts, molecular sieve catalysts, bulk chemical production, etc., can solve the problems of less research on the optimization and utilization of olefins, achieve improved yield and selectivity, simple process flow, Highly stable effect

Active Publication Date: 2009-06-24
CHINA PETROLEUM & CHEM CORP +1
View PDF2 Cites 32 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Numerous patents focused on the catalytic C 4 ~C 6 Catalyst and method thereof for olefin cracki

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Catalyst for producing propylene by catalytic pyrolysis and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0026] The method for preparing propylene catalyst by catalytic cracking of olefin provided by the present invention includes:

[0027] 1) The original molecular sieve powder with a grain size of 10-100nm is roasted at 400-700℃ to remove the template, and exchanged in a solution containing ammonium ions for 1 to 4 times, each exchange is 2-4 hours, and the exchange temperature is 50 ~120℃, the concentration of ammonium ion in the solution is 0.5~2mol / L, after the exchange is completed, it is dried and calcined to obtain a hydrogen molecular sieve;

[0028] 2) Immerse the hydrogen molecular sieve in a solution containing phosphorus and / or group IB metal ions, then dry and calcinate at 400-700°C for 2-6 hours to obtain a modified molecular sieve;

[0029] 3) Mix the modified molecular sieve with the heat-resistant inorganic oxide or its precursor and water uniformly, shape it into the desired shape, dry, and fire at a temperature of 400-800°C for 2-8 hours, preferably 500- Calcined ...

Example Embodiment

[0050] Example 1

[0051] 1) The original ZSM-23 molecular sieve powder with a particle size of 10-100nm is roasted at 550℃ to remove the template agent, and then mixed with 1mol / L NH 4 NO 3 The solution was ion-exchanged twice at 100°C for 4 hours each time. After the exchange, it was dried and calcined at 550°C for 4 hours to obtain a hydrogen molecular sieve.

[0052] 2) Put the hydrogen type ZSM-23 molecular sieve in a certain concentration of (NH) 2 HPO 4 Soaked in the solution, then dried and calcined at 500°C for 3 hours to obtain a P-modified molecular sieve; so that based on the total weight of the molecular sieve, the P content is 2.0% by weight;

[0053] 3) Mix the phosphorus-modified molecular sieve, silica sol and appropriate amount of water obtained in step 2 according to the weight ratio of molecular sieve dry basis: silica sol = 25:75, grind uniformly and extrude them into shape, dry and roast to obtain catalyst A1 .

Example Embodiment

[0054] Example 2

[0055] 1) The original ZSM-5 molecular sieve powder with a particle size of 10-100nm is roasted at 600°C to remove the template, and then mixed with 1mol / L NH 4 NO 3 The solution was ion-exchanged twice at 100°C for 4 hours each time. After the exchange, it was dried and calcined at 600°C for 4 hours to obtain a hydrogen molecular sieve.

[0056] 2) Put the hydrogen type ZSM-5 molecular sieve in a certain concentration of AgNO 3 Soaked in the solution, then dried and calcined at 550°C for 2 hours to obtain the Ag modified molecular sieve; so that the Ag content is 2.2% by weight based on the total weight of the molecular sieve;

[0057] 3) Mix the silver modified molecular sieve, pseudo-boehmite and appropriate amount of water obtained in step 2 according to the weight ratio of dry basis molecular sieve: pseudo-boehmite = 40:60, grind them evenly and extrude them into shape, dry, After calcination, catalyst A2 is obtained.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Grain sizeaaaaaaaaaa
Particle sizeaaaaaaaaaa
Login to view more

Abstract

The invention discloses a catalyst for producing propylene by catalytic pyrolysis and a preparation method thereof. Calculated as the total weight of the catalyst, the catalyst comprises 20 to 40 weight percent of element-modified molecular sieve and 60 to 80 weight percent of heat-resistant inorganic oxide, wherein the content of a modified element is between 1 and 10 weight percent calculated as the total weight of the molecular sieve, the average grain diameter of crystal grains of the molecular sieve is between 10 and 100nm, and the modified element is one or a mixture of more of family IB metals and/or phosphorus. The catalyst is used for reactions that low carbon olefin, particularly the propylene is produced by C6-C12 olefins through catalytic pyrolysis, and has higher conversion rate of the C6-C12 olefins and yield of the propylene.

Description

technical field [0001] The present invention relates to a catalyst for the catalytic conversion of olefins and a preparation method thereof, more specifically to a catalyst made of C 6 ~C 12 A catalyst for producing light olefins, especially propylene, by catalytic cracking of olefins and a preparation method thereof. Background technique [0002] Propylene is an important petrochemical basic raw material, mainly used in the production of polypropylene, acrylonitrile, propylene oxide, isopropanol, cumene and acrylic acid. With the rapid development of the national economy, the demand for propylene continues to increase, but the growth of propylene production capacity is limited, and the traditional method of increasing propylene production cannot meet the market demand. [0003] Hydrocarbon steam cracking process and catalytic cracking process are the two main sources of propylene. The steam cracking unit is mainly based on light raw materials. The output of propylene is ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B01J29/80B01J29/40C07C11/06C07C4/06
CPCY02P20/52
Inventor 侯焕娣崔德春张书红王子军李锐李萍肖荣军包晓东
Owner CHINA PETROLEUM & CHEM CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products