Method for preparing propylene by butene disproportionation

A technology of butene and propylene, which is applied in the field of butene disproportionation to produce propylene, which can solve the problems of high energy consumption, expensive catalyst, and reaction temperature of ethylene consumption, and achieve the effects of low production cost, reduced reaction energy consumption, and good technical effects

Inactive Publication Date: 2004-04-21
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The technical problem to be solved by the present invention is that the catalyst used in the process of generating propylene from butene disproportionation in the previous literature i

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] [Examples 1-5] and [Comparative Example 1]

[0026] Examples 1-5 are the effects of the content of tungsten oxide in the catalyst on the disproportionation reaction of butene.

[0027] Accurately weigh a certain amount of ammonium metatungstate (A.R. grade, WO 3 content is 83%), add 100 milliliters of deionized water, stir until completely dissolved. In addition, weigh a certain amount of silica gel (10-20 mesh, the specific surface is 478 meters 2 / g, SiO 2 content is 99.9%) into a 500 ml round bottom flask, and the silica gel was roasted at 550° C. for 2 hours in the air before use.

[0028] Pour the above-mentioned ammonium metatungstate solution into a round-bottomed flask filled with silica gel, evaporate the water in a rotary evaporator at 60°C, and put it in an oven at 120°C to dry overnight. The above prepared sample is placed in a muffle furnace and calcined at 550°C for 4 to 12 hours, and the obtained butene disproportionation reaction catalyst WO 3 / SiO ...

Embodiment 1

[0034] Example 1 2 2.7 25.3 39.4 10.7 1.5 15.7 4.0 0.7

Embodiment 2

[0035]Example 2 6 4.7 33.3 29.0 8.1 2.4 16.4 5.3 0.9

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PUM

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Abstract

A process for preparing propylene features that under existance of catalyst the butylene is disproportioned at 250-450 deg.C and 0.1-1.0 /hr of space speed under 0-10 MPa to obtain propylene. Said catalyst is composed of SiO2 as carrier and tungsten oxide as active component. Its advantages are cheaper catalyst and low reaction temp.

Description

technical field [0001] The invention relates to a method for producing propylene by disproportionation of butene. Background technique [0002] Olefin disproportionation is a conversion process of olefins. Under the action of the transition metal compound catalyst, the C=C double bond in the olefin is broken and re-formed to obtain a new olefin product. For example, the following formula can be used to represent the disproportionation of olefins: [0003] <chemistry num="001"> <chem file="02137460_cml001.xml" / > < / chemistry> [0004] Utilizing the disproportionation of butene, the relatively excess and low added value C 4 Olefin feedstock is converted into high value-added propylene products, and olefin disproportionation catalyst is the key to realize this process. [0005] Olefin disproportionation reaction is in VI B 、VII B , Under the catalysis of metal compounds in VIII, the olefin disproportionation catalyst can be a homo...

Claims

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Application Information

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IPC IPC(8): C07C6/04C07C11/06
Inventor 王仰东陈庆龄谢在库李为
Owner CHINA PETROLEUM & CHEM CORP
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