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Method for preparing butadiene by oxidization and dehydrogenation of butane using constant-temperature static bed

A technology of oxidative dehydrogenation and bed butene, which is applied in chemical instruments and methods, organic chemistry, hydrocarbons, etc., can solve the problems of long production process, large consumption of raw materials and energy, and has not been promoted, so as to prolong the service life , Reduction of energy consumption, significant economic and social benefits

Inactive Publication Date: 2012-05-09
SHANDONG HUAMAO NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has a long production process, consumes a lot of raw materials and energy, and has not been promoted after the war.

Method used

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  • Method for preparing butadiene by oxidization and dehydrogenation of butane using constant-temperature static bed
  • Method for preparing butadiene by oxidization and dehydrogenation of butane using constant-temperature static bed
  • Method for preparing butadiene by oxidization and dehydrogenation of butane using constant-temperature static bed

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The size of the reactor is Φ2500×5000mm, the size of the tubes is Φ50.8×2.6×5000, and the number of tubes is 1211. Heat exchange area 966m 2 , The catalyst bed height is 5000mm. Airspeed 800h -1 , the oxidative dehydrogenation temperature is 370°C, and the molar ratio of alkene: oxygen: water is 1:0.6:0.5. The average data of the 200-hour test results are shown in Table 1.

[0039] Table 1 200-hour test result table

[0040] Reaction temperature °C

Embodiment 2

[0042] The size of the reactor is Φ2500×5000mm, the size of the tubes is Φ50.8×2.6×5000, and the number of tubes is 1211. Heat exchange area 966m 2 , The catalyst bed height is 5000mm. Airspeed 600h -1 , the oxidative dehydrogenation temperature is 360°C, and the molar ratio of alkene: oxygen: water is 1:0.6:1. The average data of the 200-hour test results are shown in Table 2.

[0043] Table 2 200-hour test result table

[0044] Reaction temperature °C

Embodiment 3

[0046] The size of the reactor is Φ2500×5000mm, the size of the tubes is Φ50.8×2.6×5000, and the number of tubes is 1211. Heat exchange area 966m 2 , The catalyst bed height is 5000mm. Airspeed 1000h -1 , the oxidative dehydrogenation temperature is 390°C, and the molar ratio of alkene: oxygen: water is 1:0.55:2. The average data of the 200-hour test results are shown in Table 3.

[0047] Table 3 200-hour test result table

[0048] Reaction temperature °C

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Abstract

The invention provides a method for preparing butadiene by oxidization and dehydrogenation of butane using a constant-temperature static bed, which specifically comprises the steps that: the butane, air and water vapor are added into a static mixer according to proportions; mixed raw materials are heated to a certain temperature by a pre-heat exchanger, and then enter a constant-temperature static bed reactor for oxidization and dehydrogenation, wherein the static bed reactor is filled with catalyst, and the temperature of a catalyst bed layer of the reactor is controlled to be constant; after the mixed raw materials are oxidized and dehydrogenated, reaction products enter a post-heat exchanger for heat exchange through a raw material waste heat boiler, the products after heat exchange enter a separating system for separating the butadiene, so that butadiene product is obtained. In comparison with the prior art, the method for preparing butadiene by oxidization and dehydrogenation of butane using the constant-temperature static bed disclosed by the invention reaches a conversion per pass of the butadiene of 75%-85%, and the selectivity of the butadiene of at least 95%. The method can increase the conversion rate of the butane and the yield of the butadiene, reduce the butane and water consumed by the butadiene, greatly lower energy consumption, and decrease sewage discharge.

Description

technical field [0001] The invention relates to a method for preparing butadiene in the field of chemical industry, in particular to a method for preparing butadiene by oxidative dehydrogenation of butene in a constant temperature fixed bed. Background technique [0002] Butadiene is an important polymer monomer, which can be copolymerized with various compounds to produce various synthetic rubbers and synthetic resins. About 90% of its annual consumption is used to synthesize styrene-butadiene rubber, butadiene rubber, nitrile rubber, neoprene and ABS resin; a small amount is used to produce sulfolane and 1,4-butanediol (see butadiene diol), adiponitrile, hexamethylenediamine, butadiene oligomers and pesticide captan, etc. [0003] The production of butadiene is closely related to the development of the synthetic rubber industry. In the 1920s, Germany began to use acetylene to produce butadiene, which in turn produced synthetic rubber. During the Second World War, the hu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C11/167C07C5/48
Inventor 李皓
Owner SHANDONG HUAMAO NEW MATERIALS
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