Regeneration method for catalyst used for methylation of toluene
A toluene methylation catalyst and methylation technology are applied in catalyst regeneration/reactivation, physical/chemical process catalyst, molecular sieve catalyst, etc., and can solve the problems of complex equipment, cumbersome regeneration steps, poor recovery of catalyst activity, etc. Achieving good technical effect and good effect of active recovery
Active Publication Date: 2014-05-07
CHINA PETROLEUM & CHEM CORP +1
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Abstract
The invention relates to a regeneration method for a catalyst used for methylation of toluene, and mainly solves the problems in the prior art that the regeneration steps of the methylation of toluene are cumbersome, equipment is complex, and catalyst activity is not properly regenerated. According to the invention, material stopping, separation, replacement, oxygen supplying, and other steps are carried out along with the adjustment of temperature and pressure of a reactor; the temperature of a catalyst bed is finally controlled to the constant value of 480-520 DEG C, and the oxygen content of the system reaches 0.45-0.55% by volume; the condition is kept for 1.0-10.0 h before the reaction stops gradually. According to the technical scheme of the regeneration method, the problems in the prior art can be excellently solved, and the method can be applied to the industrial production of mixed xylenes.
Application Domain
Molecular sieve catalystsCatalyst regeneration/reactivation +3
Technology Topic
ChemistryProcess engineering +3
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