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Extra resources for Petrochemical Processes Handbook 2010
Example text
Lean solvent from the bottom of the recovery column is returned to the extractor. The extract is recovered overhead and sent on to distillation columns downstream for recovery of the individual benzene, toluene and xylene products. The raffinate stream exits the top of the extractor and is directed to the raffinate wash column (4). In the wash column, the raffinate is contacted with water to remove dissolved solvent. The solvent-rich water is vaporized in the water stripper (5) and then used as stripping steam in the recovery column.
The synthesis gas is compressed to ammonia-synthesis pressure by the syngas compressor (11), which also recycles unconverted gas through the ammonia loop. Pure syngas eliminates the loop purge and associated purge gas treatment system. The ammonia loop is based on the Ammonia Casale axial-radial three-bed converter with internal heat exchangers (13), giving a high conversion. Heat from the ammonia synthesis reaction is used to generate HP steam (14), preheat feed gas (12) and the gas is then cooled Fuel 17 9 2 Air Feed 7 3 4 5 1 BFW 6 18 11 12 14 15 10 Air 16 19 13 Ammonia and refrigerated to separate ammonia product (15).
0 Commercial plants: DuPont produces aniline using this technology for the merchant market with a total production capacity of 160,000 tpy at a plant located in Beaumont, Texas. In addition, DuPont’s aniline technology is used in three commercial units, and four new licenses have been awarded since 2004 with aniline capacities of up to 360,000 tpy in a single unit. Licensor: Kellogg Brown & Root LLC - CONTACT Copyright © 2010 Gulf Publishing Company. All rights reserved. Petrochemical Processes 2010 Home Process Categories Company Index Economics: The purity and recovery performance of an aromatics extrac- Aromatics extraction Application: The UOP Sulfolane process recovers high-purity C6 – C9 aromatics from hydrocarbon mixtures, such as reformed petroleum naphtha (reformate), pyrolysis gasoline (pygas), or coke oven light oil (COLO), by extractive distillation with or without liquid-liquid extraction.