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Catalyzer for preparing low carbon olefinic hydrocarbon through hydrocarbons catalytic oxidation cracking

A technology for catalytic oxidation and low-carbon olefins, which is used in hydrocarbon cracking to produce hydrocarbons, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc. It can solve problems such as explosion and waste of carbon resources, and achieve application The effect of wide range, reduction of surface area carbon, and reduction of cracking reaction temperature

Active Publication Date: 2008-02-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the gas phase oxygen is relatively active, the presence of a large amount of oxygen in the reaction may cause an explosion hazard; and oxygen will also generate a large amount of CO and CO due to excessive oxidation of hydrocarbons. 2 , wasting a lot of carbon resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] This example illustrates the preparation of catalyst A1, which has no support.

[0041] Weigh 32g of La(NO 3 ) 3 ·6H 2 O, 3.91gSr(NO 3 )2 and 26.89g Co(NO 3 ) 3 ·6H 2 O, dissolved in 650ml distilled water to prepare a mixed nitrate solution; then weigh 50g of anhydrous Na 2 CO 3 , dissolved in 700ml distilled water to make Na 2 CO 3 Aqueous solution; continuously drop Na into the mixed nitrate mixture under stirring state 2 CO 3 In aqueous solution, flocculent precipitates are formed, and the pH value reaches 10 as the titration end point. The resulting precipitate was filtered and washed, dried at 120°C for 10 hours, and calcined at 850°C for 10 hours to obtain an oxygen-carrying metal oxide X powder. The composition of the oxygen-carrying metal oxide X was 58.25% by weight La 2 o 3 , 37.10 wt% Co 2 o 3 , 4.65 wt% SrO (based on the weight of the oxygen-carrying metal oxide). Mix X powder and ZSM-5 zeolite uniformly at a weight ratio of 2:8, press into tab...

Embodiment 2

[0043] This example illustrates the use of catalyst A1.

[0044] The catalyst A1 prepared in Example 1 is loaded into a fixed-bed reactor, and n-octane and steam are introduced into the reactor. -1 Carry out catalytic oxidative cracking reaction under the condition of condition, separate reactant flow and obtain target product low-carbon olefin, the conversion rate of n-octane is as high as 63.91 weight %, C 2 -C 4 Olefin selectivity up to 48.40 wt%, C 2 -C 4 The yield of olefin is as high as 30.94% by weight; the surface area of ​​the catalyst is 0.76% by weight of carbon.

Embodiment 3

[0049] This example illustrates the preparation of Catalyst A2, which has no support.

[0050] The oxygen-supporting metal oxide X powder prepared in Example 1 and ZSM-5 zeolite were uniformly mixed in a weight ratio of 4:6, and then pressed into tablets and shaped to obtain catalyst A2. The composition of catalyst A2 is: 40% by weight of oxygen-supporting metal oxide X, 60% by weight of ZSM-5 zeolite.

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PUM

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Abstract

A catalyst preparing light olefins from hydrocarbon catalytic oxidation cracking is provided. Weight percentage compositions of components in the catalyst are as follows: 10-100 percent by weight of an active component, and 0-90 percent by weight of a carrier, wherein the active component comprises oxygen-carrying type metal oxide and acid catalytic material. Weight percentage compositions of components in the active component are as follows: 10-99 percent by weight of the oxygen-carrying type metal oxide, and 1-90 percent by weight of the acid catalytic material. The hydrocarbon oil raw material is contacted with the above catalyst, proceeds with catalytic oxidation cracking reaction under the conditions of 500-800 DEG C, the water-oil ratio of 0-1.5 and the feeding quality space velocity of 1-500 h-1, and separates reaction logistics to obtain the target product of light olefins. The catalyst not only improves the conversion of raw materials, but also improves the yield and selectivity of ethylene, propylene and butane to different extent, and simultaneously reduces the carbon deposition on the catalyst surface.

Description

technical field [0001] The invention belongs to a catalyst for preparing low-carbon olefins by catalytic oxidation cracking of hydrocarbons and a preparation method thereof, and a catalytic oxidation cracking method for preparing low-carbon olefins from hydrocarbons by using the catalyst. Background technique [0002] Low-carbon olefins such as ethylene, propylene and butadiene are basic petrochemical raw materials. The production capacity and output of ethylene indicate the development level of a country's petrochemical industry, but my country is still relatively backward in this regard. After decades of development, the steam pyrolysis of hydrocarbons to ethylene technology has developed various innovative technologies and continuously improved them, but it is still the largest energy-consuming device in the ethylene industry, and its energy consumption accounts for 40% of that in the petrochemical industry. %. From a global perspective, currently ethylene cracking raw m...

Claims

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Application Information

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IPC IPC(8): B01J29/40B01J29/08B01J29/06B01J23/10B01J21/06B01J23/22B01J23/26B01J23/28B01J23/30B01J23/16B01J23/745B01J23/75B01J23/755B01J23/72C07C4/06C07C11/06C07C11/04C07C11/12C10G11/04
CPCY02P20/52
Inventor 白雪王子军张书红李锐
Owner CHINA PETROLEUM & CHEM CORP
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