in. TEACHING (TECHNICAL). 



517 



Tri-phenyl-rosaniline 



>saniline hydrochlo- \ C 6 H 5 f 



- 1C 6 H 5 * ( 



<8j6, | 



1: Ns i 



CH M S 



CeHs f 



C 6 H 5 Ns ( 



CH S ; 



HCl 



Sodium tri-phenyl-rosaniline sul- 

 phonate .... 



Tri-phenyl-rosaniline sulphonic 

 acid ..... 



Sodium phenyl-rosaniline sul- 

 phonate .... 



Di-phenyl-rosaniline acetate 



Calcium tri-phenyl-rosaniline di- 

 sulphonate - - 



Methyl-rosaniline 

 (fused) .. 



Di-methyl-rosaniline 

 rate (fused) . 



hydrochlorate 



" N ' 1 



HS0 3 



C 2 H 3 O a 



Commercial Name. 

 Pure opal blue. 



Fast blue, 6B. 



Alkali violet. 

 Atlas blue. 



hydrochlo- 



Rosaniline hydrochlorate (fused) - 



Tri-methyl-rosaniline methyl io- 

 dide - - - - - 



Anthracene - 



Alizarin .... 



Anthrapurpurin ... 



17 N 3 ] 

 J 



Ca(SO 3 ) 3 Soluble blue. 



j HCl Hofmann violet cake E. 



HCl Hofmann violet cakeBB . 



Roseine cake. 



CH 3 

 CH 3 



C U H 8 O 5 



(CH 3 I) 3 Iodine green crystals. 



Anthracene. 

 Alizarin (blue shade) . 

 Alizarin (red shade). 



2477. Soda Waste, Alkali Waste, Black Ash Waste, or 

 Tank Waste. Insoluble residue formed in the second or black 

 ash stage of Leblanc's process for obtaining soda from common 

 salt. John Hutchinson fy Co. 



From the appended analysis by Kopp of a sample it will be seen that a 



large quantity of sulphur is present in the waste. A part of this can be 

 profitably extracted by Mond's and other processes. 



Sulphide of sodium - - 2,880 



Carbonate of lime - - - 13,636 



Silicate of lime - - 5,680 



Hydrate of lime - 8,588 



Monosulphide of calcium - - 22,162 



Alumina, magnesia - - 1,466 



Sulphide of iron - - 2,670 



Carbon - - 1,800 



Sand - - 2,000 



Water - - - 36,700 



Combined water and loss - 2,418 



2478. Oxidized Soda, Alkali, or Vat Waste. 



John Hutchinson $ Co. 



In Mond's process a current of air at the ordinary temperature is forced 

 through the waste as it lies in the vats, directly the last soda liquors are 

 drained away. The waste becomes hot, oxydizing, and forming polysulphides 

 of calcium, hyposulphite and hydrosulphate of calcium. The waste is then 

 lixiviated, and the liquid removed, the residue being again treated as above 

 several times. 



