We have a butamer unit for isomerisation of nC4 into iC4. As our feed has over 2000ppm of olefins, there is an apprehension that u/s dryer beds will get fouled up and will call for early / premature replacements owing to potential polymerisation of olefins. Our questions are:-
1. Is there any refinery that processes with high olefins in the feed stock like ours, if yes, how they are managing the dryer life.
2. Did any refinery use hydroteatment for olefins saturation at such low level?