Process for recovering FCC product
A process is disclosed for recovering product from catalytically converted product streams. Gaseous unstabilized naphtha from an overhead receiver from a main fractionation column is compressed in a compressor. Liquid unstabilized naphtha from the overhead receiver and liquid naphtha fraction from the compressor are sent to a naphtha splitter column upstream of a primary absorber. Consequently, less naphtha is circulated in the gas recovery system.
1. A fluid catalytic cracking process comprising:
feeding a first hydrocarbon feed to a first fluid catalytic cracking reactor;
contacting said first hydrocarbon feed with catalyst to provide first products;
feeding a portion of said first products to a main fractionation column;
separating an overhead fraction of said first products from said main fractionation column in an overhead receiver to provide a bottoms liquid stream;
sending a portion of said bottoms liquid stream directly from said overhead receiver to a naphtha splitter; and
splitting a liquid stream from said overhead receiver in a naphtha splitter column to provide a light naphtha stream.
2. The fluid catalytic cracking process of claim 1 further comprising feeding said light naphtha stream to a primary absorber column.
3. The fluid catalytic cracking process of claim 1 further comprising:
feeding a portion of said light naphtha stream as a second hydrocarbon feed to a second reactor; and
contacting said second hydrocarbon feed with catalyst to provide second products.
4. The fluid catalytic cracking process of claim 2 further comprising feeding a portion of a liquid fraction from said primary absorber column to a debutanizer column.
5. The fluid catalytic cracking process of claim 4 further comprising feeding a light naphtha fraction from said debutanizer column as feed to a second reactor.
6. The fluid catalytic cracking process of claim 5 wherein said light naphtha fraction is a vapor side draw from the debutanizer column.
7. The fluid catalytic cracking process of claim 4 further comprising feeding an overhead fraction from said debutanizer column to an LPG splitter column and feeding a bottoms stream from said LPG splitter column to a second reactor.
8. The fluid catalytic cracking process of claim 1 further comprising compressing a gaseous stream from said overhead receiver, separating a liquid fraction from a compressed gaseous fraction and feeding said liquid fraction to said naphtha splitter column.
9. The fluid catalytic cracking process of claim 1 further comprising compressing a gaseous stream from said overhead receiver, separating a liquid fraction from a compressed gaseous fraction and feeding said compressed gaseous fraction to a primary absorber column and at least a portion of said liquid fraction to a column.
10. The fluid catalytic cracking process of claim 9 further comprising feeding at least a portion of a light naphtha stream from said naphtha splitter to said primary absorber column.
11. The fluid catalytic cracking process of claim 1 further comprising feeding a bottoms stream from said naphtha splitter column to a heavy naphtha splitter column to provide two or more heavy naphtha cuts.
12. A conversion and fractionation process comprising:
feeding a hydrocarbon feed to a reactor;
contacting said hydrocarbon feed with catalyst to provide products;
feeding a portion of said products comprising unstabilized naphtha from an overhead receiver of a main fractionation column directly to a naphtha splitter; and
sending a light naphtha stream from said naphtha splitter to a primary absorber column.
13. The conversion and fractionation process of claim 12 further comprising fractionating said products in said main fractionation column; separating an overhead fraction of said first products from said main column in said overhead receiver; and sending a liquid stream comprising the unstabilized naphtha from said overhead receiver to said naphtha splitter.
14. The conversion and fractionation process of claim 13 further comprising compressing a gaseous stream from said overhead receiver, separating a liquid fraction from a compressed gaseous fraction and feeding said liquid fraction to said naphtha splitter.
15. The conversion and fractionation process of claim 13 further comprising compressing a gaseous stream from said overhead receiver, separating a liquid fraction from a compressed gaseous fraction and feeding said gaseous fraction to a primary absorber.
16. The conversion and fractionation process of claim 15 further comprising feeding at least a portion of said liquid fraction from said overhead receiver to a debutanizer, feeding a light naphtha stream from said debutanizer as a second hydrocarbon feed to a second reactor and contacting said second hydrocarbon feed with catalyst to provide second products.
17. The conversion and fractionation process of claim 15 further comprising feeding at least a portion of said liquid fraction to a depropanizer column, feeding a light naphtha stream from said depropanizer column as a second hydrocarbon feed to a second reactor and contacting said second hydrocarbon feed with catalyst to provide second products.
18. The conversion and fractionation process of claim 12 further comprising feeding a bottoms stream from said naphtha splitter to a heavy naphtha splitter column to provide two or more heavy naphtha cuts.
19. A catalytic cracking and fractionation process comprising:
feeding a hydrocarbon feed to a reactor;
contacting said hydrocarbon feed with catalyst to provide cracked products;
feeding a portion of said cracked products to a main fractionation column;
separating an overhead fraction of said cracked products from said main fractionation column in an overhead receiver to provide a liquid stream comprising unstabilized naphtha; and
splitting said liquid stream comprising unstabilized naphtha from said overhead receiver in a naphtha splitter column to provide a light naphtha stream.
20. The catalytic cracking and fractionation process of claim 19 further comprising compressing a gaseous stream from said overhead receiver, separating a liquid fraction from a compressed gaseous fraction, feeding said liquid fraction to said naphtha splitter column and further compressing said compressed gaseous fraction.