Evaluation of Feed Stocks for Aromatics, Olefins and Surfactant Plants
Aromatics - Naphtha, Pyrolysis gasoline, LPG
Olefins- Ethane, Propane, Naphtha, Gas oil
SURFACTAN PLANTS - Kerosene for paraffins, benzene
Desired components in feed for olefins productions
Physical Properties: Density, distillation range are useful and give a rough assessment of feed quality.
The following components in feed give ethylene in decreasing order: Ethane, Butane to Decane, 3 and 2 Methyl hexane, 2 methyl Pentane/ 2,2 Dimethyl Butane, Isopentane
The following components in feed give propylene in decreasing order:
Isobutane, n-nutane, n-propane, 3 methyl pentane, 2,3 dimethyl butane, 2 methyl hexane, n-pentane, 3 methyl hexane, iso pentane.
Butadiene The following components of feed give butadiene is decreasing order: Cyclo hexane, methyl cyclo pentane.
Naphtha cut C6 to C9
Paraffin, Napthenes, Aromatics 110 to 140 oC
Dehydrogenation of C8Napthene yield C8 aromatics. Most desirable component 90% of C8napthalene in feed gets converted to C8 aromatics
Integration of Refinery with Petrochemical
Advances in processing technologies are playing a larger role in integrating refining and petrochemical facilities . In the changing scenario, petroleum refining and petrochemical production integration will be of vital importance for maximizing the use of byproducts and improving the overall economy of a petroleum refinery. A great deal of synergy exists between the refinery, aromatics complexes and steam cracker complex. Off gases from the FCC unit and coker containing ethylene and propylene can be integrated with the cold section of steam cracker. Pyrolysis gasoline is a good source of aromatics which can be integrated with the catalytic reforming process. Propylene from FCC and benzene from aromatics are feed stocks for the production of cumene and phenol. A new concept of refinery petrochemical integration are:
Petrochemical Processes within refinery which will help in integration of refinery and petrochemicals
Off gas from FCC and delayed coking units contains a good quantity of ethane, ethylene, propylene and some propane and recovery of these hydrocarbons may be economical in the refinery.
Indalin is a versatile indigenous technology adding value to upstream and downstream oil industry. Indalin is a catalytic cracking process for upgradation of low value naphtha to very high yield of LPG, containing high olefins such as propylene, ethylene butylenes etc. Surplus kerosene and gas oil range fraction can also be processed along with naphtha. Indalin can integrate a refinery with petrochemicals complex and therefore offers a tremendous opportunity for value addition through upgradation of low value streams to petrochemical feed stock.