YIELD’s
This parameters depends on the catalyst used, however generally they turn around the following numbers:

Content of o-xylene in feed to reactor 80-90gr/Nm3
High reactor yield (depends on catalyst) up to 115 kg/kg of o-xylene
De-sublimation efficiency on SW. C. up to 99,8wt%
Distillation residues 2-3 wt%
   
Overall plant Yield (kg/kg)     109                -           106
Expresed in 100% o-xylene and commercial PA (new catalyst)     (old catalyst)
The catalyst life time 4 to 5 years.