Sulfolane
2
THE INDUSTRY'S LEADING C 6 -C 9 AROMATICS EXTRACTION PROCESS Sulfolane is the leading benzene, toluene and xylenes (BTX) extraction technology due in a large part to our research, licensing efforts, experience and engineering expertise. This most up-to-date technology has many outstanding features, among which is the ability to design for a wide spectrum of feedstocks along with high BTX recovery, product purity and operating efficiency. BTX AROMATICS FROM THE TOUGHEST FEEDSTOCKS Whether it is pyrolysis gasoline or coke oven light oil, we have the processing know-how that enables you to produce benzene at any quality level. Also, as the world's foremost hydrogenation technology supplier, we offer processes to remove any undesirable compounds present in potential Sulfolane unit feedstocks: sulfur, nitrogen, thiophene, diolefins and olefins. PROCESS DESCRIPTION Hydrocarbon feed is pumped to the liquid-liquid Extraction Column where the aromatics are dissolved selectively in the Sulfolane water-based solvent and separated from the insoluble non aromatics (paraffins, olefins and naphthenes). The non aromatic raffinate phase exits at the top of the column and is sent to the Raffinate Wash Tower. The Raffinate Wash Tower recovers dissolved and entrained Sulfolane by water extraction and the raffinate is sent to storage. Water containing Sulfolane is recycled to the Water Stripper. The solvent phase leaving the Extractor contains aromatics and small amounts of non aromatics. The latter are removed in the Stripper and recycled to the Extraction Column. The aromatic-enriched solvent is pumped from the Stripper to the Recovery Tower where the aromatics are vacuum distilled from the solvent and sent to downstream clay treatment and distillation. Meanwhile, the solvent is returned to the Extractor and the process repeats itself. Stripper Recovery Tower Extractor Raffinate Aromatics Water Water Wash Feed Lean Solvent Water Rich Solvent Extract Recycle To Water Stripper Simplified Sulfolane Flowscheme TECHNOLOGICAL IMPROVEMENTS THAT MAKE THE DIFFERENCE Our technology has been enhanced many times through industrial experience and engineering improvements. For example, the re-designed extractor operates at lower temperature and solvent-to-feed ratios. This results in lower solvent make-up (<0.005 lb/bbl feed) and heat duties which significantly reduce operating cost compared to other technologies. Sulfolane AROMATICS EXTRACTION FROM PYROLYSIS GASOLINE, REFORMATE, COKE OVEN LIGHT OIL AND KEROSENE
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Sulfolane
Transcript of Sulfolane
THE INDUSTRY'S LEADING C6-C9 AROMATICS EXTRACTION PROCESS
Sulfolane is the leading benzene, toluene and xylenes (BTX) extraction technology due in a large part to our research, licensing efforts, experience and engineering expertise. This most up-to-date technology has many outstanding features, among which is the ability to design for a wide spectrum of feedstocks along with high BTX recovery, product purity and operating efficiency.
BTX AROMATICS FROM THE TOUGHEST FEEDSTOCKS
Whether it is pyrolysis gasoline or coke oven light oil, we have the processing know-how that enables you to produce benzene at any quality level. Also, as the world's foremost hydrogenation technology supplier, we offer processes to remove any undesirable compounds present in potential Sulfolane unit feedstocks: sulfur, nitrogen, thiophene, diolefins and olefins.
PROCESS DESCRIPTION
Hydrocarbon feed is pumped to the liquid-liquid Extraction Column where the aromatics are dissolved selectively in the Sulfolane water-based solvent and separated from the insoluble non aromatics (paraffins, olefins and naphthenes). The non aromatic raffinate phase exits at the top of the column and is sent to the Raffinate Wash Tower. The Raffinate Wash Tower recovers dissolved and entrained Sulfolane by water extraction and the raffinate is sent to storage. Water containing Sulfolane is recycled to the Water Stripper.
The solvent phase leaving the Extractor contains aromatics and small amounts of non aromatics. The latter are removed in the Stripper and recycled to the Extraction Column. The aromatic-enriched solvent is pumped from the Stripper to the Recovery Tower where the aromatics are vacuum distilled from the solvent and sent to downstream clay treatment and distillation. Meanwhile, the solvent is returned to the Extractor and the process repeats itself.
StripperRecovery
TowerExtractor Raffinate
Aromatics
Water
WaterWash
Feed
Lean SolventWater
Rich Solvent
Extract Recycle
To WaterStripper
Simplified Sulfolane Flowscheme
TECHNOLOGICAL IMPROVEMENTS THAT MAKE THE DIFFERENCE
Our technology has been enhanced many times through industrial experience and engineering improvements. For example, the re-designed extractor operates at lower temperature and solvent-to-feed ratios. This results in lower solvent make-up (<0.005 lb/bbl feed) and heat duties which significantly reduce operating cost compared to other technologies.
Sulfolane AROMATICS EXTRACTION FROM PYROLYSIS GASOLINE, REFORMATE, COKE OVEN LIGHT OIL AND KEROSENE
Potentially corrosive solvent degradation products are eliminated by a proprietary solvent clean-up system. These and other improvements serve to enhance the process reliability to the point where it enjoys an on stream factor greater than 96%.
INDUSTRY'S HIGHEST BTX RECOVERIES
Typical Sulfolane BTX recoveries are 99.9% and the guarantees are unmatched by other processes. C8 aromatics recovery guarantees are even better–by far the highest available.
SAFE, SELECTIVE SOLVENT
Sulfolane is used to extract aromatics having boiling points as high as 205ºC (401°F)- its own boiling point being 285ºC (545°F). The solvent's high selectivity and water solubility afford very low solvent losses, high recovery rates and low operating costs. Sulfolane itself is non corrosive which enables mild carbon steel to be used as the construction material. Other solvent features are its low toxicity and non-explosive nature.
ECONOMIC INFORMATION
Feed C6-C8
Pyrolysis Gasoline
C6-C9
Reformate
Feed MTA, 250,000 533,000 Utilities per MT of feed: Cooling, MM Kcal 0.32 0.28 MP Steam, MT 0.59 0.27 Power, kWh 8.9 5.6 ISBL Investment, 106 USD 25 28
2010 US Gulf Coast location
COMMERCIAL EXPERIENCE
Over twenty licensed units are operating around the world with the most recent licensees in South Korea, Brazil, and Thailand. Commercial units are operating on pyrolysis gasoline, BT and BTX reformate, Coke Oven Light Oils, mixtures of the above and straight run naphtha for jet fuel smoke point improvement.
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