How to extend the service life of aniline catalysts?
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How to extend the service life of aniline catalysts? Let me start by pointing out: 1. Stable operation ； 2. Control the center temperature reasonably; if the test results are normal, try to maintain a lower temperature. 3. Reduce the un-nitrated content in ***.
The original poster was too vague; it should be more specific
Ensure that the purity of fresh hydrogen is >99.5%, and the purity of recycled hydrogen is >95%
The dispersion of hydrogen is crucial. ***Phenols are very toxic to catalysts