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Technology - SATCO™
February 19, 2003
SATCO™ – Sulphuric Acid by Thermal Cracking Oxidation
The SATCO™ process regenerates spent sulphuric acid to obtain a highly pure product that is equivalent in quality to “virgin” sulphuric acid and complies with the most stringent standards. The first SATCO™ process went into operation in the USA in 1943. The process was developed by Rhone-Poulenc has has been refined over the years through the design and operation of 9 plants world-wide.
Spent acid comes from a number of different process such as alkylation , sulfonation, nitration and gas drying/purification. The SATCO™ process introduces the spent sulphuric acid into a 1000°C furnace where the H2SO4 molecule ‘cracks’ yielding SO2 and H2O. The organic contaminates are oxidized to carbon dioxide. Inorganic contaminates are transformed into ash, an inert material.
The gas leaving the furnace is cooled in a waste heat boiler generating steam for process use or the generation of electricity. The cooled gas enters a conventional gas cleaning system followed by a contact sulphuric acid plant.
The SATCO™ process is essentially what we now refer to as a Sulphuric Acid Regeneration (SAR) plant but with the experience and know-how of 60 years of plant operation.