| abstract |
(57) [Summary] [Structure] In a hydrochloric acid distillation apparatus for recovering hydrochloric acid from hydrochloric acid water at high temperature and high pressure, the heater for evaporating the hydrochloric acid water is a heater made of carbon or tantalum, and the filling material in the tower is a resin. Column impregnated with carbon or ceramics impregnated with carbon, a column whose column is lined with fluororesin, ceramics and carbon impregnated with resin, a pump for circulating hydrochloric acid water is a pump lined with ceramics or fluorocarbon resin Is. [Effect] Hydrochloric acid can be distilled at a relatively high temperature, and hydrochloric acid gas can be obtained with a higher recovery rate than conventional distillation methods. |