AirSO3 Sulfatioii Sulfonation J

This process for surfactant manufacture has many advantages and is used extensively. With SO3 sulfation, no water is generated in the reaction. A process flow diagram is shown in Figure 10. SO3 can be generated at the plant by burning sulfur or sulfur dioxide with air instead of obtaining it as a liquid. Because of this reaction's particular tendency to char the product, the reactor system must be cleaned thoroughly on a regular basis. In addition, there are usually several airborne sulfonic acid streams that must be scrubbed, with the wastewater going to the sewer during sulfation.

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