Production of chemical raw materials, e.g. terephthalic acid, comprises hydrolysis of polymers in fluidized layer with superheated steam

摘要

A process for recovery of chemical raw materials from polycondensates and polyaddition compounds by hydrolysis in a fluidized layer (26) which is heated indirectly to 250-600 deg C via a jacketed hot radiation tube (22), in which steam is used for fluidization and a desublimer (40) for removal of the sublimed compounds, which is coupled to fluidized reactor (20) is new.