M.w YORK mai! mi -I QIC 



phosphorus alag is formed which is known as the Thomas phos- 



|>h; 



Ammonium sulfate 

 In the manufacture of aqua ammoniae from ammonium Bulfate 

 lime Lb n- form Bulfate of lime and thus liberate the am- 



monia, sufficient quantity being required to convert all the Bulfurio 

 i in the Bulfate and about one third mor 



The lime is added in nearly every instance in the form of 

 milk of lime, caustic of lime being employed in rare cases with 

 a new to utilizing the heat evolved during the slaking, as in the 

 Solvay pr< This is not to be recommended, however, owing 



to the uncertainty which exists as to the time required by tlie 

 lime to slake: for, if the latter is slow slaking, a temporary 

 shortage of Km ilts, followed by a momentary excessive 



reaction, and, if any steppage of the apparatus occurs, explosion 

 may, and indeed at times does, result. 1 



The lime milk should be free from unslaked particles or sand 



. and magnesia is undesirable from the fact that it retards 



the distillation it" ammonium chlorid or sulfate is present in the 



liquor, since it forms a double salt with them which can not 



be decomposed except at high concentration. 



Contents of 1 liter of lime milk 



!:iium6 '""SP" ,£££ Water grama **•-» 



10 1258.6 133.3 1125.3 10. G 



15 1345 171). 7 1165.3 13.2 



20 1 436 1.3 1 211.7 15.68 



25 1478 258.3 1219.7 17.52 



1490 270.7 1213.8 18.67 



1 405.4 289.1 1 206.3 19.43 



40 1 499 297.9 1201.1 19.88 



i:. 1 501 .2 303.7 1 197.5 20.22 



1 503.2 :;<»S.3 1 L94.9 20. I- 



1 504.6 31 L.9 1 192.7 20.7 



1 505.8 31 1.7 1 191 .1 20.89 



1507 317.2 1189.8 21.05 



) I', asch. Min. in 1. 7 \ 10. 



