ELTECH cells

Cl recovery of CrO Cr plating rinse water Eltech Retec chrome recovery cell 131... 

RETEC cell from Eltech Systems Corp [23,252,253]... 

Ketec cell Eltech Vertical metal (or carbon) foam electrodes in a tank Discontinuous cathode steel (chemically stripped for reuse carbon No ... 

In summary, diaphragm cell technology is not stagnant. It is alive and well and very active. Diaphragm cell technology remains a key part of ELTECH s business. It is a... 

ADCT is a trademark of ELTECH Systems Corporation for Advanced Diaphragm Cell Technology. 

Kazimir, E.S. (1999) Monopolar Cathode Design Improvements and Other Diaphragm Cell Component Advances. ELTECH Systems Corporation, Chlorine/Chlorate Seminar. 

Fig. 26.11. Cut view of ELTECH s diaphragm cell. (Courtesy ofELTECH Systems Corporation.)...

Fig. 26.13. Expanded view of ELTECH ExL bipolar membrane cell electrolyzer. (Courtesy of ELTECH Systems Corporation.)...

Cells with three-dimensional electrodes providing enlarged specific electrode area and improved mass transport due to the specific fluid dynamics inside the three-dimensional structure are, for example, the porous flow-through cell [68], the RETEC (RETEC is a trademark of ELTECH Systems Inc., Cardon, Ohio) cell [15], the packed-bed cell [69-71],... 

Fig. 6 ELTECH Systems M DC cells, (a) Brine feed rotometer (b) head sight glass (c) cell head (d) cathode frame assembly (e) tube sheet (f) base plate (g) cathode tube (h) base plate protector (i) DSA [3, p. 65].

Important vendors of membrane cell technology are Asahi-Kasei, Chlorine Engineers, ELTECH, and INEOS and UhdeNora. 

ELTECH System Corporation currently markets both the Hooker cells and Diamond cells. Other diaphragm-cell technologies developed during the 1970s include the Hooker-Uhde cell and the ICI-Solvay cell. These cell designs are addressed in Chapter 5. 

In the case of a diaphragm or membrane chlor-alkali cell, there are three ohmic drops to consider anode to separator, cathode to separator, and across the separator. The anode to cathode distance in ELTECH s H-4 cell is 7.74 imrt, the thickness of the diaphragm is 3.05 mm, and the cathode to diaphragm distance is negligible. The anode to diaphragm ohmic drop, // a/s. niay now be estimated from the conductivity data of the electrolytes, which are presented in the appendix to this section. 

FIGURE4.7.13. Comparison of cell voltage data with HAPP, SM-1 andSM-2di hragms vstime[72]. (With permission from ELTECH Systems Corporatiott.)... 

Vertical diaphragm cells are either cylindrical or rectangular. The cylindrical cells include the Gibbs, Moore, and Wheeler cells [83,84]. The rectangular cell designs arc the Allen Moore, Townsend, Nelson, Hooker, Diamond, Solvay Cie, Kuieha Chemical, Nippon Soda, Showa Denka, and ICI cells. The only supplier of diaphragm cells today is ELTECH, who provides the Hooker H-iype and Diamond MDC-type electrolyzers. The reader is referred to Chapter 3 and the literature [66-68,71,85] for details related to the Hooker-Uhde cells and the earlier versions of the S- and H-type cells. 

The major workhorse of the diaphragm-cell electrolysis is the ELTECH electrolyzer, H-4 and MDC-55. There are several conunon features in these cell designs, as can be seen in Fig. 5.17. The base of the cell is a copper plate with spot faced holes to anchor the anodes (Fig. 5.18). It also acts as a current conductor. Either a sheet rubber cover or a titanium base cover using rubber rings around the anode posts protects the copper base. 

FIGURE 5.17. ELTECH s MDC and H series cells. ( Tth p nmssion from ELTECH Systems Corporation.)... 

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