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
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  • 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 pro

Method used

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  • 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

Example Embodiment

[0026] [Example 1]

[0027] Prepare MCM-48 mesoporous molecular sieve by conventional methods, with a pore size of 3.4 nanometers and a specific surface area of ​​1213 meters 2 / G.

[0028] Soak 1 kg of MCM-48 in 2 kg of deionized water for 10 minutes, beating for 10 minutes, then add 200 g of 63 g of ammonium metatungstate solution, and finally add 200 g of silica sol (silica content 40%) for beating for 15 minutes. 40% solid content slurry. The slurry was spray-dried at an inlet air temperature of 600°C and an outlet air temperature of 350°C, and then calcined in a muffle furnace at 550°C for 4 hours to prepare a catalyst. The average particle size of the catalyst was 60 microns. The bulk density and Wear index, result list 1.

[0029] Install 30 grams of catalyst in a Ф30 fluidized bed reactor to etherify C 4 As raw material at space velocity WHSV for 6 hours -1 , The catalyst performance was evaluated under the conditions of 400℃ and 0.5MPa, and the results are shown in Table 2...

Example

[0030] 【Examples 2~6】

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

[0032] Install 30 grams of catalyst in a Ф30 fluidized bed reactor to etherify C 4 As raw material at space velocity WHSV for 6 hours -1 , The catalyst performance was evaluated under the conditions of 400℃ and 0.5MPa, and the results are shown in Table 2.

[0033] Table 1 Physical data of different catalysts

[0034]

[0035] Table 2 Evaluation results of different catalysts

[0036] Example

Example

[0037] 【Examples 7-11】

[0038] Using the catalyst of Example 1 to change the evaluation result list of different process conditions 3

[0039] Table 3 Evaluation results of catalyst activity under different process conditions

[0040]

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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

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Application Information

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IPC IPC(8): C07C11/06C07C4/06B01J29/78B01J29/03
CPCY02P20/52
Inventor 宣东王仰东刘苏
Owner CHINA PETROLEUM & CHEM CORP
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