Chemical engineering . ent , Nov. 22, filed Nov. 18, 1901. The above process is a simplification of the inventors firstpatent which was described in II., page 326. (See also Vol. I., page 586; Vol. II., page18.) It consists essentially in the production of an electriccurrent in a galvanic cell by using tin as the positive andcarbon as the negative pole, the electrolyte being molten caus-tic potash. Mercuric oxide is used as the depolarizer, whichbecomes reduced to mercurous oxide or metallic mercury dur-ing the operation, and is regenerate
Chemical engineering . ent , Nov. 22, filed Nov. 18, 1901. The above process is a simplification of the inventors firstpatent which was described in II., page 326. (See also Vol. I., page 586; Vol. II., page18.) It consists essentially in the production of an electriccurrent in a galvanic cell by using tin as the positive andcarbon as the negative pole, the electrolyte being molten caus-tic potash. Mercuric oxide is used as the depolarizer, whichbecomes reduced to mercurous oxide or metallic mercury dur-ing the operation, and is regenerated in a separate vessel. Thetin is oxidized to oxide of tin, and the latter is constantly re-duced in the apparatus by means of fuel gas passed into thecell. The fuel gas is generated in a gas producer in about thesame manner that water gas is generally made, omitting, how-ever, preferably the impregnation of the gas by battery is illustrated in vertical cross-section in Fig. 3. <f».« A9 3^^^^^3[ji. ?74l7A ^7 IJ-JJ 7/1^^ (^. FK:. 3.—CELL FOR CONVERTING OF FUEL INTO ELECTRICALENERGY. It consists of a vessel made of some material unaffected bycaustic potash, upon which rests by means of a flange thesquare, porous carbon vessel, 10. This vessel serves as thenegative plate and contains the mercuric oxide, 17. A flatpan, 16, with a ledge, 15, rests on the bottom of the outervessel and contains the metallic tin which constitutes the pos-itive pole. The fluid. 18, in the inner and the outer vessel isa watery solution of caustic potash, kept at an elevated tem-perature. The solution is covered with a layer of paraffine,32, to prevent absorption of carbon dioxide and oxygen fromthe air. The reducing gas is introduced throtiRli [)i(ie. 6,9 32 ELI-:CTROCHKMIC-\L AXO METALLL-RCICAL IXOrSTRV. [Vol. III. No. t. heated in coils, 69, and supplied to the cell by pipes, 71, 72, and73, which are provided with suitable jets, 73, 74, and 75. Theshape of the jets is pr
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