On-line agent changing method of methyl tert-butyl ether (MTBE) expanded bed reactor

A technology of reactor and expanded bed, which is applied in the field of catalyst on-line replacement, can solve the problems of shutdown catalyst regeneration, etc., and achieve the effects of increased production capacity, low energy consumption, and significant benefits

Inactive Publication Date: 2012-08-01
XI'AN PETROLEUM UNIVERSITY
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Problems solved by technology

However, as the reaction proceeds, when the conversion rate of isobutene is lower than 85% due to unavoidable deactivation, the catalyst needs to be shut down to regenerate and replace it.

Method used

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  • On-line agent changing method of methyl tert-butyl ether (MTBE) expanded bed reactor
  • On-line agent changing method of methyl tert-butyl ether (MTBE) expanded bed reactor
  • On-line agent changing method of methyl tert-butyl ether (MTBE) expanded bed reactor

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Embodiment Construction

[0037] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0038] refer to figure 2 , the problems faced by the secondary reactor running alone:

[0039] (1) Temperature control

[0040] The two-stage fixed-bed reactor, which originally assumed a conversion rate of about 10%, had to undertake a conversion rate of about 80% to 90% when operating alone. The secondary reactor is not designed with a circulation heat extraction system, and corresponding measures should be taken to prevent the phenomenon of "flying temperature" when it is running independently.

[0041] (2) Pressure control

[0042] After the primary reactor is cut out, the resistance of the reaction material decreases, the system pressure increases, the heat of vaporization of the material decreases, and the side reaction products will be produced in large quantities due to the increase of the system temperature. It is necessa...

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Abstract

The invention discloses an on-line agent changing method of a methyl tert-butyl ether (MTBE) expanded bed reactor. A first-stage reactor and a second-stage reactor are selectively cut out from a reaction unit at proper time according to the inactivation degree of catalysts in the two reactors, catalysts in the corresponding reactors are replaced, the second-stage reactor and the first-stage reactor still realize independent production and operation, the work of the device does not stop, and the goal of isolation cyclic agent changing is realized. The agent changing method provided by the invention has the characteristics that the operation is simple, and the operation is easy.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and relates to an on-line agent changing method of an MTBE expanded bed reactor, in particular to an on-line agent changing method applied to a catalyst in an expanded bed, low alcohol-ene ratio MTBE synthesis process. Background technique [0002] MTBE, or methyl tert-butyl ether, is an important high-octane gasoline blending component, which is of great significance to gasoline upgrading and clean fuel production. According to the different reactors, the industrial production of MTBE mainly includes conventional shell and tube, cylinder, expanded bed, mixed-phase bed process and catalytic distillation process. Regardless of the process, impurities such as ammonia, lye, and metal ions that are inevitably entrained in raw materials such as C4 and methanol will cause catalyst deactivation and affect the service life of the catalyst. In order to maintain normal production, it is necessary...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C43/04C07C41/06
Inventor 黄风林屈雪利卞雯
Owner XI'AN PETROLEUM UNIVERSITY
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