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TECHNOLOGY: Sulpholane Extraction Technology for Production of Pure Benzene and Toluene
APPLICATIONS:
- For the production of pure aromatics like benzene, toluene and/or xylene from aromatic rich feed stocks such as catalytic reformats and hydrogenated pyrolysis gasoline
- Production of special boiling point solvents.
- Production of low aromatic feedstocks for fertilizer and petrochemical plants.
TECHNOLOGY STATUS: - Jointly developed with EIL
- Two commercial units at BPCL,Mumbai,and KRL Kochhi in operation.
| Products | Benzene | Toluene | ON STREAM | | 1. | BPCL,MUMBAI | 98,000 TPA | 17,000 TPA | 1985 | | 2. | KRL,KOCHHI | 90,000 TPA | 17,000 TPA | 1987 |
- Technology offered to other proposed units in country.
SALIENT FEATURES:
- Use of Sulpholane, as extraction solvent, possesses a favorable combination of solvent power and selectivity resulting in the production of aromatic hydrocarbons in high purity (99.9% +) and yields( Aliphatic impurities < 300 ppm)
- Flexible in handling wide boiling range feedstock. Heart cut feed preparation is not required .
- Low utilities requirement as compared to extractive distillation process.
- Low solvent loss
- Plant adaptations for future needs.
Techno-Economics:
- Maximum units operational world over, are based on sulpholane process
- The typical costs (including fractionators) for a unit to process 230,000 MTPA of feed containing about 70 wt.% aromatics are as follows: Investment Million US $ 21.0 (Basis: turnkey installation, battery limits, Indian location, March 2004) Utilities Electricity, MW 0.5 Steam, MT/Hr 30 Water, cooling, MT/Hr 950 Inert Gas, NM3/Hr 100
- Payback period < 3 yrs
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