METHOD AND APPARATUS FOR GENERATING SULFUR TRIOXIDE FROM FUMING SULFURIC ACID USING MICROWAVE ENERGY

摘要

PURPOSE: To generate SO₃ necessary for sulfonation of an org. compd. or intensification of fuming sulfuric acid by making microwave energy act on a fuming sulfuric acid supply substance highly contg. SO₃ for the time sufficient for generation of SO₃ and waste fuming sulfuric acid. ;CONSTITUTION: The fuming sulfuric acid supply substance (37.5% SO₃) highly contg. SO₃ is continuously supplied through an inlet 11 to a tubular quartz reactor 1 mounted within a microwave electric field applicator 2 connected to a microwave generator 3, where the microwave energy of frequencies 915, 2450, 5859, 1800 MHz generated at the microwave generator 3 is acted on the supply for the time sufficient for the generation of SO₃ and the waste fuming sulfuric acid. The resulted SO₃ is stored in a tank 15. On the other hand, the separated waste fuming sulfuric acid is cooled by a cooler 18 and is further passed through a drying machine 19 for drying air used for dilution of SO₃ and, thereafter, the waste fuming sulfuric acid is mixed with a suitable volume of water to form sulfuric acid (98%).;COPYRIGHT: (C)1989,JPO