Tyrer sulfonation process

What is Tyrer sulfonation process?

The Tyrer sulfonation process, first reported by Tyrer in 1917, is an industrial process for producing benzenesulfonic acid. It involves the azeotropic removal of water at temperatures ranging from 100-185°C. The resulting benzenesulfonic acid is then fused with caustic soda and 10-20% water at temperatures between 300-330°C to produce phenol. The industrial production of benzenesulfonic acid using this process is known as the Tyrer process, and the reactor used for this purpose is called the Tyrer sulfonator. While the addition of Na2SO4 or K2SO4 can facilitate the sulfonation of aromatic compounds, the generation of water during the sulfonation process can decrease the concentration of sulfuric acid H2SO4.

Tyrer sulfonation process
Tyrer sulfonation process

References

Tyrer, D., “Sulfonation of hydrocarbons.” U.S. Patent, 1210725 (1917)

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