. Journal. whichto study the reduction of phosphorus, as fireclay vessels 196 JOURNAL OF THE SOCIETT OF CHEMICAL INDUSTRY. were found to be very pOTOlM to the \apoiir (pian itiijK->rtai: the lovs in the i tually worked), while porcelain retorts were liable to i hoke andexplode. The complete collection, too, of the phosphoruscould not be ensured by any number of washings throughliquid. Inn was eventually accomplished by filtering themvard through a bed of a uniform fine-grained -lid(small gam The experimental apparatus is shown in the figure: — at 1000 C. : phosphorus was detected at 1160 ,
. Journal. whichto study the reduction of phosphorus, as fireclay vessels 196 JOURNAL OF THE SOCIETT OF CHEMICAL INDUSTRY. were found to be very pOTOlM to the \apoiir (pian itiijK->rtai: the lovs in the i tually worked), while porcelain retorts were liable to i hoke andexplode. The complete collection, too, of the phosphoruscould not be ensured by any number of washings throughliquid. Inn was eventually accomplished by filtering themvard through a bed of a uniform fine-grained -lid(small gam The experimental apparatus is shown in the figure: — at 1000 C. : phosphorus was detected at 1160 , In distil in quantity at 1200. and the distillation endl1460 t. The yield was 92 per cent, (another ex tment at higher temperatures gave no higher yield)very little was in the killed condition. Elcheating has lately been adopted in German works, iretorts are sheet-iron cylinders lined with fireclay, tlirthe lower part of which carbon electrodes are introdiThe materials are fed in continuously, and the res. The furnace is a porcelain tube A, surrounded by aspiral wrapping of nickel wire (*-5 m. long, 1 ), and jacketed by an outer fireclay tube, the wholepacked in kieselguhi in a wooden box. At onethermo-electric pyrometer passes air-tight through aping a : at the other the wide tube / (provided with thesmall side-tube m for taking Bamples of the gas) dips underthe water in the wash-bottle B. through the lid of whichthe tube c (/ leading into the gas-filter, built up ofthe glass portions h and i and the sheet metal portion i,;irr\ ing a sieve / on which is laid a layer of garnetsof 2-3 mm. mean diameter. From the filter the gaseshrough the final wash-bottle D, and the meter Einto the atmosphere. The mixture for reduction havingbeen placed in the tube and all made tight, the tempera-ture was gradually raised bv passing a current throughthe nickel wire. From 300to oW C. all the sulphuricacid present was evolved as sulphur dioxide. At 700c evolved gas became combu
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectchemist, bookyear1882
