Method for preparing butadiene from C4 aliphatic hydrocarbons by oxidative dehydrogenation and catalyst used by same

An oxidative dehydrogenation and catalyst technology, which is applied in the chemical industry, can solve the problems of no test result data for catalytic performance, unstable performance, rising cost, etc., and achieve the effect of simple structure, high activity and selectivity, and ample conditions.

Active Publication Date: 2013-04-24
CHINA PETROLEUM & CHEM CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The iron-based catalysts involved in the above three patents are all composite oxides with a spinel structure, and also contain more than one other metal element, but their performance is not very stable. Among them, the catalyst containing Cr can effectively Improve its stability, but the presence of Cr has adverse effects on people and the environment. The above catalysts are all suitable for use in dehydrogenation reactors leading to baffle fluidized beds
In addition, the cost of the above patents has increased due to the addition of other active metal elements. In addition, it is only in the small test stage of the laboratory. The effect of

Method used

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  • Method for preparing butadiene from C4 aliphatic hydrocarbons by oxidative dehydrogenation and catalyst used by same
  • Method for preparing butadiene from C4 aliphatic hydrocarbons by oxidative dehydrogenation and catalyst used by same
  • Method for preparing butadiene from C4 aliphatic hydrocarbons by oxidative dehydrogenation and catalyst used by same

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Experimental program
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Effect test

Embodiment 1

[0029] C4 aliphatic hydrocarbon space velocity 400h -1 , the catalyst bed temperature is 406°C, the vapor-ene ratio is 12, the oxygen-ene ratio is 0.6, and the catalyst is ZnFe-containing 2 o 4 65%, α-Fe 2 o 3 35%, the reaction results are shown in Table 1.

[0030] Table 1 Reaction Results

[0031]

Embodiment 2

[0033] C4 aliphatic hydrocarbon space velocity 400h -1 , the catalyst bed temperature is 404°C, the vapor-ene ratio is 12, the oxygen-ene ratio is 0.8, and the catalyst is ZnFe-containing 2 o 4 65%, α-Fe 2 o 3 35%, the reaction results are shown in Table 2.

[0034] Table 2 Reaction Results

[0035]

Embodiment 3

[0037] C4 aliphatic hydrocarbon space velocity 400h -1 , the catalyst bed temperature is 387°C, the vapor-ene ratio is 9, the oxygen-ene ratio is 0.6, and the catalyst is ZnFe-containing 2 o 4 65%, α-Fe 2 o 3 35%, the reaction results are shown in Table 3.

[0038] Table 3 Reaction Results

[0039]

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Abstract

The invention relates to a method for preparing butadiene from C4 aliphatic hydrocarbons by oxidative dehydrogenation and a catalyst used by the same, belonging to the technical field of chemical engineering. C4 aliphatic hydrocarbons contact an oxidative dehydrogenation catalyst in the presence of oxygen and steam under the conditions of high air speed, proper oxygen-olefine ratio and water-olefine ratio and proper reaction temperature to obtain the butadiene, of which the olefine conversion rate is higher than 80%, the selectivity is higher than 90% and the yield is higher than 75%.

Description

Technical field: [0001] The invention relates to a method for preparing butadiene by oxidative dehydrogenation of C4 aliphatic hydrocarbons, which belongs to the technical field of chemical industry. Background technique: [0002] Butadiene is one of the basic raw materials of petrochemical industry. Its role in petrochemical olefin raw materials is second only to ethylene and propylene. It is widely used in synthetic rubber, synthetic resin and other organic chemical products. As a monomer of synthetic rubber, the amount of butadiene accounts for about 60% of the consumption of all synthetic rubber raw materials. The processing and utilization level of butadiene is an important symbol of the development level of the entire petrochemical industry. [0003] Butadiene is mainly extracted from the by-product mixed C4 fraction of ethylene cracking unit in industry. In addition, butadiene can also be produced from butane and butene by dehydrogenation. The typical butane dehydro...

Claims

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Application Information

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IPC IPC(8): B01J23/80C07C11/16C07C5/48
Inventor 童莉潘罗其曾光乐张庆忠黄伊辉彭涛杜建文
Owner CHINA PETROLEUM & CHEM CORP
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