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Fixed bed catalyst for producing propene from butylene by disproportion

A fixed bed catalyst and catalyst technology, applied in physical/chemical process catalysts, bulk chemical production, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of ethylene consumption reaction temperature, expensive catalyst, product separation Difficulties and other problems, to achieve the effects of lower catalyst prices, easy product separation, 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

[0010] The technical problem to be solved by the present invention is to overcome the problems existing in the previous literature such as product separation difficulty, relatively expensive catalyst price, need to consume ethylene or high reaction temperature to increase a large amount of energy consumption, and provide a new method for the production of propylene by disproportionation of butene catalyst

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Catalyst preparation: accurately weigh 3.61 grams of ammonium metatungstate (A.R. grade, WO 3 Content is 83%) add 100 milliliters of deionized water, stir until completely dissolved. Another weigh silica gel (10 ~ 20 mesh, specific surface is 478 meters 2 / g, SiO 2 Content is 99.9%) 47 grams are put into 500 milliliters round-bottom flasks, and silica gel is roasted in air at 550 ℃ before use.

[0022] 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.

[0023] The above prepared sample was placed in a muffle furnace and roasted at 550°C for 6 hours to obtain 6% WO for butene disproportionation reaction 3 / SiO 2 50 grams of catalyst, wherein the specific surface area of ​​the catalyst is 415 meters 2 / gram. The XRD of the catalyst has no WO 3 characteristic diffraction peaks, indicating that WO 3 High disp...

Embodiment 2～7

[0025] The space velocity has a significant impact on the production of propylene by the disproportionation reaction of butene. Using butene-1 as the raw material, increasing the space velocity is beneficial to the isomerization of butene-1, but not conducive to increasing the yield of propylene.

[0026] Add a volume of 110 cm at the bottom of a reactor with a length of 110 cm and an inner diameter of 2.5 cm 3 , particle size is 10~20 order glass ball fillers; 40 grams of the catalyst prepared by Example 1 are added to the reactor, and the top end of the catalyst is added 60 cm 3 , particle size of 10 to 20 mesh glass ball filler. The temperature of the reactor was raised to 550° C. under the condition of feeding 10 liters / hour of nitrogen, and kept at this temperature for 2 hours, and then lowered to a reaction temperature of 350° C.

[0027] Stop feeding nitrogen into the reactor, and feed 99.5% butene-1 raw material from the upper end of the reactor, the pressure of the r...

Embodiment

[0032] g / h h -1 Mole % Mole %

[0033] 2 7.20 0.18 91.2 29.7

[0034] 3 14.4 0.36 91.9 33.3

[0035] 4 28.8 0.72 89.7 28.0

[0036] 5 43.2 1.08 87.9 24.9

[0037] 6 57.6 1.44 85.4 15.4

[0038] 7 120 3.00 84.0 12.8

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PUM

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Abstract

A fixed-bed catalyst for disproportionating butylene to prepare propylene is composed of SiO2 as carrier and tungsten oxide as active component. Its advantages are easy separation of product, low cost, low energy consumption and great specific surface area (270-550 sq.m / g).

Description

technical field [0001] The present invention relates to a fixed-bed catalyst for the disproportionation of butene to produce propylene. Background technique [0002] In recent years, due to the continuous development of the global economy, the market demand for light olefins (including ethylene, propylene, etc.) has been increasing. However, with the increase of the production capacity of steam cracking to ethylene with naphtha as raw material, the by-product C 4 Production of olefin feedstocks is also increasing. Utilize relatively surplus and low added value C 4 It is of great significance to produce high value-added products as raw materials of olefins, and the disproportionation of butene involved in the present invention to produce propylene is a promising process. [0003] 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...

Claims

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Application Information

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IPC IPC(8): B01J23/30C07C6/04C07C11/06
CPCY02P20/52
Inventor 王仰东陈庆龄谢在库李为
Owner CHINA PETROLEUM & CHEM CORP
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