Patent name: METHOD FOR JOINT PHENOL, ACETONE AND ALPHA-METHYLSTYRENE PRODUCTION
Patent Number: Patent No. 1361937
Priority: November 14, 1985
August 22, 1987
This invention refers to oxygen-containing compounds, in particular, to joint phenol, acetone and alpha-methylstyrene production, which are widely used in organic synthesis. The purpose is to reduce isopropylbenzene consumption and increase productivity. Target phenol, acetone and alpha-methylstyrene are produced through cleavage of technical isopropylbenzene hydroperoxide at 35-60°C in the presence of H2SO4 and NH3. Obtained cleavage reaction mass is circulated and held in a plug-flow reactor at 70-100°C and 0.3-5 atm. The process is carried out at the circulation ratio of the cleavage reaction mass of 8-16 through the supply of aqueous ammonia solution to the plug-flow reactor at a sulfuric acid-ammonia total weight ratio of 11.6 : 1 to 23,4 : 1, or supply of water at a sulfuric acid-water total weight ratio of from 1 : 64 to 1 : 13. Target phenol, acetone and alpha-methylstyrene are separated through fractionation. The invention reduces isopropylbenzene consumption from 839.0 kg/kg to 807.5 kg/kg and increases productivity from 17 t/hr to 30 t/hr.