The Mannheim process is an industrial process for a production of hydrogen chloride together with sodium sulfate from sulfuric acid & sodium chloride. a Mannheim furnace is also used to develope potassium sulfate from potassium chloride. The Mannheim process is a stage in the Leblanc process for the production of sodium carbonate.
The process is conducted in a Mannheim furnace, a large cast iron kiln. Sodium chloride and sulfuric acid are first fed onto a stationary reaction plate where an initial reaction takes place. The stationary plate is up to 6 m 20 ft in diameter. Rotating rabble arms constantly restyle over the mixture and advance the intermediate product to a lower plate. The kiln detail of the furnace is constructed with bricks that take high resistance to direct flame, temperature, and acid. The other parts of the furnace are heat and acid resistant. Hot flue gas passes up over the plates execution liberated hydrogen chloride gas. The intermediate product reacts with more sodium chloride in the lower, hotter unit of the kiln producing sodium sulfate. This exits the furnace and passes through cooling drums previously being milled, screened and pointed to product storage facilities.
The process involves intermediate order of sodium bisulfate, an exothermic reaction that occur at room temperature:
Thestep of the process is endothermic, requiring power to direct or build input:
Temperatures in the range 600-700 °C are required.