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Note on the Use of Alundum Filtering Crucibles
Journal of Industrial & Engineering Chemistry
are formed on the walls of t h e storage vessels. It is necessary t o remove these deposits a t intervals of 2 t o 3 mo., as they contain an appreciable amount of ammonium salts. S U M M A R Y This permutit method of preparing ammonia-free water is applicable if distilled water is used. It has advantages over other methods of preparation in ease of operation and production of large quantities a t minimum expense. The disadvantages of the method are t h a t it gives a water of higher mineraldoi:10.1021/ie50128a032 fatcat:vylcikgtlngwtirpj722hexaju