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

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...

AI Technical Summary

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.

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