Uhde Mercury Cells

The Uhde cells [68,73] have a cathode surface area of 4-30 m. They have a machined steel cell bottom with rubber-lined sidewalls and end boxes. The inlet end box, through 

Vertical decomposers, situated at the end of each cell, are provided with hydrogen coolers. The flow of the amalgam into the decomposer is by gravity. A two-compartment rubber-lined end box cleans the amalgam off the entrained brine before it enters the decomposer. 

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Fig. 2 Uhde mercury cell, (a) Cell base (b) anode (c) cover seal (d) cell cover ...

Figure 25. Cell room Uhde mercury cells...

In 1997 Bayer AG increased chlorine production at its Uerdingen site by adding Krupp Uhde membrane electrolysers to the existing mercury cells. In order to achieve a high chlorine quality (minimum oxygen concentration) and maximum chlorine yield, the acidic process is run - namely the brine leaves the cells at a low pH of 2.5-3. 

The main mercury cathode electrolytic cells used in the industry were developed chiefly by De Nora and Uhde, and to a lesser extent by IC1, Krebs Kureha, Olin and Solvay. 

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