Method for preparing propylene by fluidized bed olefin disproportionation

A technology for olefin disproportionation and fluidized bed catalyst, which is applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc. Collapse, good technical effect, delayed poisoning effect

Active Publication Date: 2014-05-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is that there is a problem in the prior art that the catalyst is rapidly coked and deactivated so that the service life is short, and a new method for producing propylene by disproportionation of olefins in a fluidized bed is provided, which has the advantage of a long service life of the catalyst

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Soak 1 kg of silicon oxide in 2 kg 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 (40% silicon oxide content) for 15 minutes of beating to obtain 40 % solid content of 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 600°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.

[0024] Install 30 grams of catalyst in a Φ30 fluidized bed reactor, and evaluate the conditions and results in Table 2.

[0025]

Embodiment 2

[0027] Soak 1 kilogram of silicon oxide in 2 kilograms of deionized water for 10 minutes, beat for 10 minutes, add 200 grams of a solution containing 63 grams of ammonium metatungstate, 30 grams of lanthanum nitrate, and 31 grams of zirconium nitrate, and finally add 200 grams of silica sol (oxidized Silicon content 40%) beating for 15 minutes to obtain a slurry with 40% solid content. 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 600°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.

[0028] Install 30 grams of catalyst in a Φ30 fluidized bed reactor, and evaluate the conditions and results in Table 2.

[0029]

Embodiment 3

[0031] Soak 1 kilogram of silicon oxide in 2 kilograms of deionized water for 10 minutes, beat for 10 minutes, add 200 grams of a solution containing 63 grams of ammonium metatungstate, 60 grams of lanthanum nitrate, and 93 grams of zirconium nitrate, and finally add 200 grams of silica sol (oxidized Silicon content 40%) beating for 15 minutes to obtain a slurry with 40% solid content. 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 600°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.

[0032] Install 30 grams of catalyst in a Φ30 fluidized bed reactor, and evaluate the conditions and results in Table 2.

[0033]

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Abstract

The invention relates to a method for preparing propylene by fluidized bed olefin disproportionation, and mainly to solve the problem of deactivation of a catalyst due to rapid coking in the prior art. According to the technical scheme, ethylene and butylene are used as raw materials, and the raw materials and a fluidized bed catalyst are in contact with each other to react to generate a propylene-containing material flow under the condition that the reaction temperature is 320 to 500 DEG C, the reaction pressure is 0 to 1 MPa based on the absolute pressure, and the weight hourly space velocity is1 to 20 h<-1>, wherein the fluidized catalyst comprises the following components in parts by weight: a) 1 to 20 parts of tungsten oxide and b) 80 to 99 parts of a silicon oxide carrier. According to the method, a problem in the prior art is better solved; the preparation method can be used for the industrial production of propylene by olefin disproportionation.

Description

technical field [0001] The invention relates to a method for producing propylene by the disproportionation of olefins in a fluidized bed. 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 olef...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C11/06C07C6/04B01J23/30
CPCY02P20/52
Inventor 宣东滕加伟刘苏董静
Owner CHINA PETROLEUM & CHEM CORP
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