Activation method of butene oxidative dehydrogenation catalyst

A technology of oxidative dehydrogenation and activation methods, applied in catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of shortened service life, low initial activity, long induction period, etc.

Active Publication Date: 2014-12-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is that there is a long induction period, low initial activity and shortened service life in the existing butadiene production process, and a new activation method for butene oxidative dehydrogenation catalyst is provided

Method used

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  • Activation method of butene oxidative dehydrogenation catalyst
  • Activation method of butene oxidative dehydrogenation catalyst
  • Activation method of butene oxidative dehydrogenation catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] In a 1.5-liter adiabatic two-stage reactor, an iron-based spinel oxidative dehydrogenation catalyst is used, at an activation temperature of 380°C, an oxygen / water vapor volume ratio of 0.03, and a water vapor volume space velocity of 800 hours -1 , the concentration of dimethyl disulfide is 20ppm, and the system pressure is 0.1MPa and treated for 80 hours. The specific treatment conditions are shown in Table 1.

[0022] Stop the feeding of dimethyl disulfide, wait until the system reaches the reaction conditions, the butene feed starts to react, at 380°C, the volume space velocity of butene is 400 hours -1 , O 2 / C 4 h 8 The performance evaluation was carried out under the conditions of 0.7 and water-ene ratio of 12, and the reaction results are shown in Table 2.

[0023]

Embodiment 2

[0025] The activation temperature is controlled at 340°C, the oxygen / water vapor volume ratio is 0.05, and the water vapor volume space velocity is 1600h -1 , Methyl ethyl disulfide concentration 10ppm, system pressure 0.05MPa after 90 hours of treatment under the conditions, the rest are the same as [Example 1].

[0026]

Embodiment 3

[0028] The activation temperature is controlled at 420°C, the oxygen / water vapor volume ratio is 0.03, and the water vapor volume space velocity is 1600h -1 , dimethyl disulfide concentration 50ppm, system pressure 0.15MPa under the conditions of 110 hours, the rest are the same as [embodiment 1].

[0029]

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Abstract

The invention relates to an activation method of a butene oxidative dehydrogenation catalyst, and mainly solves the problems of long induction period, low initial activity and shortened service life in the prior art of butadiene production. The method provided by the invention comprises the following steps: treating the iron series spinel composite oxide catalyst for butylene oxidative dehydrogenation to produce butadiene at 300-550 DEG C under the conditions of gauge pressure of 0-0.2 MPa, oxygen / steam volume ratio of 0.01-0.1, water vapor volume space velocity of 400-4000 / h and sulfide gas phase concentration of 0-100 ppm for at least 24 h. The technical scheme well solves the problem, and can be used in industrial production of butadiene from butene oxidative dehydrogenation.

Description

technical field [0001] The invention relates to an activation method of a butene oxidative dehydrogenation catalyst, in particular to an activation method of an iron-based spinel composite oxide catalyst for preparing butadiene by oxidative dehydrogenation of butene. Background technique [0002] Butadiene is the basic raw material of petrochemical industry and an important monomer for the production of polymer synthetic materials. It can be copolymerized with various compounds to produce various synthetic rubbers and synthetic resins. At present, there are mainly two production methods of butadiene: steam cracking in refinery to ethylene co-production, C4 extraction and separation and butene oxidation. Almost all butadiene in my country comes from C4 extraction and separation. This process has economic advantages, but it is obtained as a by-product of the refinery cracking unit. With the increase in demand for butadiene production in the rubber industry, the cracking unit T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J37/20C07C11/167C07C5/48
Inventor 吴文海樊志贵曾铁强张磊缪长喜
Owner CHINA PETROLEUM & CHEM CORP
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