. The manufacture of pulp and paper : a textbook of modern pulp and paper mill practice. out \ inch. The box is divided into three compartments, of which A and B at either end are anode chambers, while the larger middle compartment C is the ca-thode chamber. The an-odes 1 and 4 are carbon plates, which are suspended from the top of the box. The principal cathode is a layer of mercury 2, which rests on the bottom of the box. The partitions D andE do not extend completelyto the bottom of the box,but dip into grooves thatare filled with the mercury,as shown, which thus en-tirely seals the middle
. The manufacture of pulp and paper : a textbook of modern pulp and paper mill practice. out \ inch. The box is divided into three compartments, of which A and B at either end are anode chambers, while the larger middle compartment C is the ca-thode chamber. The an-odes 1 and 4 are carbon plates, which are suspended from the top of the box. The principal cathode is a layer of mercury 2, which rests on the bottom of the box. The partitions D andE do not extend completelyto the bottom of the box,but dip into grooves thatare filled with the mercury,as shown, which thus en-tirely seals the middle com-partment from the othertwo. A secondary ironcathode 5 is suspended inthe chamber C. With thecell in the position shown,the mercury is principallyin chambers A and is fed into A throughpipe 8, and is decomposedby the current passing fromanode 1 to the mercury be-low. The chlorine passesout through pipe 10, andthe sodium is dischargedat the mercury cathode,where it amalgamates with the mercury before it has an oppor-tunity to react with the water. When a sufficient quantity. 12 BLEACHING OF PULP §9 of amalgam has been produced, the eccentric 15 revolves (aboutonce per minute) and tilts the box, so that the amalgam that hasbeen formed flows under partition D and into the cathode cham-ber C. Here it is decomposed b}r water, which is fed in throughpipe 12. The sodium unites with the water to form hydrogen(which escapes at 11) and sodium hydrate (which is dischargedat 13). The reactions that have been going on in chamber A arenow repeated in chamber B, into which the mercury from thedecomposed amalgam in C has passed by reason of the tilting ofthe box. The chlorine escapes at 9 and the brine enters at reaction in A now ceases until the next periodical tilting ofthe box, which will send the amalgam formed in B into chamberC and the mercury (which has been freed from the sodium in 0)into A again. As will be noted, the electric circuit is divided;this insures that the
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectpaperma, bookyear1921
