Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for preparing propylene by disproportionating fluidized bed olefin

An olefin disproportionation and fluidized bed technology, which is used in hydrocarbon cracking to produce hydrocarbons, chemical instruments and methods, catalysts for physical/chemical processes, etc. Effects of strength, high reactivity and propylene selectivity

Active Publication Date: 2012-05-23
CHINA PETROLEUM & CHEM CORP +1
View PDF7 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The technical problem to be solved by the present invention is that there are problems in the prior art that the catalyst is rapidly coked and deactivated so that the service life is short and the yield of propylene is low. A method for producing propylene by disproportionation of olefins in a fluidized bed is provided. The method has the advantages of long service life of the catalyst, Advantages of high propylene yield

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
  • Method for preparing propylene by disproportionating fluidized bed olefin
  • Method for preparing propylene by disproportionating fluidized bed olefin
  • Method for preparing propylene by disproportionating fluidized bed olefin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] MCM-48 mesoporous molecular sieves were produced by conventional methods, with a pore size of 3.4 nm and a specific surface area of ​​1213 m 2 / gram.

[0028] Soak 1 kilogram of MCM-48 in 2 kilograms of deionized water for 10 minutes, beat for 10 minutes, add 200 grams of ammonium metatungstate solution containing 63 grams, and finally add 200 grams of silica sol (silicon oxide content 40%) and beat for 15 minutes to obtain 40% solids slurry. The slurry was spray-dried at an inlet air temperature of 600°C and an outlet air temperature of 350°C, and then baked in a muffle furnace at 550°C for 4 hours to make a catalyst. The average particle size of the catalyst was 60 microns. The bulk density and Wear index, results list 1.

[0029] Install 30 grams of catalyst in a Ф30 fluidized bed reactor to etherify C 4 For raw materials at space velocity WHSV6 hours -1 , Catalyst performance was evaluated under the conditions of 400°C and 0.5MPa, the result list 2.

Embodiment 2～6

[0031] The same preparation process as in Example 1, only changing the proportion of different components and mesoporous molecular sieves, to obtain different catalysts, the average particle size of the catalysts is 60 microns, the bulk density and wear index of the catalysts are tested, and the results are listed in Table 1.

[0032] Install 30 grams of catalyst in a Ф30 fluidized bed reactor to etherify C 4 For raw materials at space velocity WHSV6 hours -1 , Catalyst performance was evaluated under the conditions of 400°C and 0.5MPa, the result list 2.

[0033] Table 1 Physical property data of different catalysts

[0034]

[0035] Evaluation results of different catalysts in table 2

[0036] Example

Embodiment 7～11

[0038] With embodiment 1 catalyst, change the evaluation result list 3 of different process conditions

[0039] Table 3 Catalyst activity evaluation results under different process conditions

[0040]

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

No PUM Login to View More

Abstract

The invention relates to a method for preparing propylene by disproportionating fluidized bed olefin. The problems that a catalyst quickly cokes and is inactivated and the yield of the propylene is low in the prior art are solved. The method comprises the following steps that: C4 serves as a raw material, and under the condition that the reaction temperature is 320 to 500 DEG C, the reaction pressure measured by a pressure meter is 0 to 1MPa and the weight space velocity is 1 to 20h-1, the raw material is contacted with a fluidized bed catalyst to react to generate a material flow containing the propylene, wherein the fluidized bed catalyst comprises the following components in percentage by weight: a) 0.08 to 20 percent of tungsten oxide, b) 20 to 80 percent of mesoporous molecular sieve carrier selected from MCM series, SBA series and MSU series, and c) 10 to 60 percent of binding agent selected from at least one aluminum sol, silica sol or silica and alumina sol. The problems are better solved through the technical scheme and the method can be applied to the industrial production of the propylene by disproportionating the olefin.

Description

technical field [0001] The invention relates to a method for producing propylene by fluidized bed olefin disproportionation. Background technique [0002] The demand for basic chemical raw materials such as propylene and ethylene continues to grow, while crude oil raw materials are deteriorating day by day, which has brought about increasingly prominent contradictions in the production of propylene and ethylene. On the other hand, mixed carbon four and above olefins and alkanes are by-products of ethylene plants, refinery FCC units, methanol to olefins, and gasoline units, and usually can only be used as low value-added products such as liquefied gas fuels. It is of great significance to use these olefin raw materials for further deep processing to produce high value-added products propylene and ethylene, and to make full use of this considerable amount of precious resources. [0003] Olefin disproportionation (Olefin metathesis) is a conversion process of olefins. Under t...

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): C07C11/06C07C4/06B01J29/78B01J29/03
CPCY02P20/52
Inventor 宣东王仰东刘苏
Owner CHINA PETROLEUM & CHEM CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com