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Method for producing butadiene by oxidatively dehydrogenating butene and used catalyst

An oxidative dehydrogenation, lattice oxygen catalyst technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., to achieve low energy consumption, reduced energy consumption, high Yield effect

Active Publication Date: 2013-05-15
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Most of the above patents reflect the preparation methods and laboratory evaluation results of iron-based catalysts, and a lot of research and development work is still needed in terms of industrial applications

Method used

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  • Method for producing butadiene by oxidatively dehydrogenating butene and used catalyst
  • Method for producing butadiene by oxidatively dehydrogenating butene and used catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0055] n-butene 15625kg / h, of which isobutene3 / h, preheat to 110°C, then mix butene with steam first, and then mix with oxygen. The mixed raw material gas and the product gas at 400°C are heat-exchanged and heated to react, then heat-exchanged and heated to 320°C, enter the tube reactor, and react under the action of a lattice oxygen catalyst. The temperature of the reaction gas at the outlet of the reactor is 400°C, and the heat of reaction It is removed by indirect heat exchange with water vapor, and the product gas is further cooled after heat exchange with the raw material gas. After separating a large amount of water, it is compressed and entered into the NMP process for the absorption, separation and purification of butadiene, which can produce butadiene of polymerization grade purity. olefin products. Butene single-pass conversion rate is 85%, butadiene selectivity is not less than 94%, butadiene yield is greater than 80%, and oxygen-containing compounds are less than ...

Embodiment 2

[0057] N-butene 15625kg / h, of which isobutene3 / h, preheated to 110°C. Butene is mixed with steam first and then with oxygen. The mixed raw material gas and the product gas at 390°C are heated up to react, and then the temperature is raised to above 300°C, and enter the tube reactor, where the reaction is carried out under the action of a lattice oxygen catalyst. The temperature of the reaction gas at the outlet of the reactor is 390°C, and the reaction The heat is removed by indirect heat exchange with water vapor, and the product gas that comes out is further cooled after heat exchange with the raw material gas. After a large amount of water is separated, it is compressed and entered into the ACN process for butadiene absorption separation and refining system, which can be produced to meet the polymerization grade standard. Butadiene products. Butene per-pass conversion rate is 90%, butadiene selectivity is 93%, butadiene yield is ~83%, and oxygen-containing compounds are 3...

Embodiment 3

[0059] n-butene 8000kg / h, of which isobutene3 / h, preheat to 110°C, then mix butene with steam first, and then mix with oxygen. The mixed raw material gas and the product gas at 410°C are heat-exchanged and heated to react, then heat-exchanged and heated to 330°C, enter the tube reactor, and react under the action of a lattice oxygen catalyst. The temperature of the reaction gas at the outlet of the reactor is 410°C, and the heat of reaction It is removed by indirect heat exchange with water vapor, and the product gas is further cooled after heat exchange with raw material gas. After separating a large amount of water, it is compressed and enters the DMF process to absorb, separate and refine butadiene to obtain butadiene of polymerization grade purity. product. Butene single-pass conversion rate is 91%, butadiene selectivity is 93.5%, butadiene yield is 85%, and oxygen-containing compound is less than 0.6%. Use 10m 3 Lattice Oxygen Catalysts, Catalysts in Composite Oxides o...

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Abstract

The invention discloses a method for producing butadiene by oxidatively dehydrogenating butane and a used catalyst. The method comprises the following steps of using product gas heat and reaction heat to exchange heat with raw material butene, water, oxygen or air, and then catalytically converting on a fixed bed to effectively prepare butadiene. The invention in particular relates to an alpha-Fe2O3, ZnFe2O4 composite oxide lattice oxygen catalyst. The raw material gas preheated to a certain temperature is heated to the temperature for reaction by adopting the sensible heat of the reaction product gas, the temperature of the reactor is controlled by steam heat-exchange, the raw material gas is heated by the sensible heat of the product gas and the stable operation of the reactor is realized, the oxidatively dehydrogenated rough butadiene logistics generated gas is separated through the processes of compression, oil-absorption and de-absorption, and extractive distillation of a butadiene solvent so as to efficiently, continuously and stably prepare the butadiene product, the once through yield of the butadiene is more than 80%.

Description

technical field [0001] The invention relates to a method for producing butadiene by oxidizing butylene with a ferrite lattice oxygen catalyst, more specifically, to a method for butene oxidation on a ferrite lattice oxygen catalyst with high activity and high selectivity Process for the production of butadiene by dehydrogenation. Background technique [0002] Butadiene is an important chemical raw material widely used in synthetic materials such as synthetic rubber. At present, butadiene is mainly produced by extracting from the products of naphtha cracking to olefins. In addition, there are processes for the production of butadiene starting from butane and butene. Typical butane dehydrogenation to butadiene process is the Houdry Catadiene process, the reaction temperature is ~600°C, and the yield of butadiene based on butane is ~65%. The butene oxidative dehydrogenation method of butene is Petro-Tex's Oxo-D process, the conversion rate of butene is ~65%, the selectivity ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C11/16C07C5/48B01J23/80
Inventor 潘罗其彭鸽威余长春曾光乐李然家童莉杜建文彭涛张庆忠黄伊辉
Owner CHINA PETROLEUM & CHEM CORP
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