Q & A > Question Details
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?
12/02/2010 A: Marcello Ferrara, ITW SrL, mferrara@itw.it
You could overcome the fouling by using our online cleaning technology. We have online cleaned an entire Butadiene Unit and removed polymers with no man entry.
22/09/2009 A: Kamaljit Medhi, Indian Oil Corporation Ltd, medhik@indianoil.in
I think you should hydrotreat the olefins prior to sending to any isomerization reactor. In the new Isomerization unit for C5/C6 at our Refinery, we are planning to feed Coker Naphtha which has very high olefin (About 35%). Coker Naphtha also contains high S &* other impurities. So we are going to process it through a Hydrotreater with HR 945/ACT961/HR-538 catalyst from Axens, France.
11/09/2009 A: Mike Watson, Tube Tech International Ltd, mike.watson@tubetech.com
You might wish to consider on-line cleaning technology that overcomes the fouling on the dryer bed.
11/09/2009 A: keith bowers, B and B Consulting, kebowers47@gmail.com
Feed to any reforming/isomerization catalyst should always be hydrotreated to remove ALL impurities that might 'foul' the catalyst.