Method of production of phenol.

摘要

Process for the production of phenol in which: … …  1) benzene is reacted with propene and isopropyl alcohol in contact with a catalyst based on a dealuminated Y zeolite with a SiO2/Al2O3 molar ratio of between 8 and 70, and the product obtained is then fractionated into a first fraction containing unconverted benzene, a second fraction containing cumene and a third fraction containing polyisopropylbenzenes, …  2) the said third fraction is reacted with benzene in contact with a catalyst based on a dealuminated Y zeolite with a SiO2/Al2O3 molar ratio between 8 and 70 or based on a dealuminated mordenite with an overall Si/Al atomic ratio of between 20 and 60, and cumene is collected, …  3) the cumene obtained is converted into a mixture of acetone and phenol, …  4) the acetone obtained is at least partially hydrogenated to isopropyl alcohol which is then at least partially recycled towards stage 1. … ……