. Journal. i«vv<v<vyivw^wi<<^-vNf^v.^^vc<Vi^ Fig. T— Mi. THE JOURNAL OF THE SOCIETY OF CHEMICAL INDUSTRY. Sept. - - product being freed from acid by repeated washing withwater in the wooden tub 1!. The preeipitate is collectedon the filter C, and the water use 1 in washing allowed tostand over night in tlie vat D, the colouring matter -tillremaining in suspension being deposited and collected onthe filter E, the contents of which are worked up in thesucceeding operation, while the bulk of the material is driedon the drving plates F. The resulting nitro-eosin is thentr
. Journal. i«vv<v<vyivw^wi<<^-vNf^v.^^vc<Vi^ Fig. T— Mi. THE JOURNAL OF THE SOCIETY OF CHEMICAL INDUSTRY. Sept. - - product being freed from acid by repeated washing withwater in the wooden tub 1!. The preeipitate is collectedon the filter C, and the water use 1 in washing allowed tostand over night in tlie vat D, the colouring matter -tillremaining in suspension being deposited and collected onthe filter E, the contents of which are worked up in thesucceeding operation, while the bulk of the material is driedon the drving plates F. The resulting nitro-eosin is thentreated with dry ammonia gas in order to render it soluble.(O. Miihlbauser, this Journal, 1892,676). Should the eosinused have been somewhat impure, the free acid is treated asfollows. The colouring matter is digested in the vessel Gwith a solution of soda insufficient for its saturation, blownover into the tub H, allowed to settle and deposit theundissolved portion of the colouring matter, and the solutionpassed through the filter J into the jacketed pan K, andevapo
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectchemist, bookyear1882
