Journal . apparatus. The followingtable will indicate the results of this process ofdesiccation :— TABLE A. RESULTS OF DRYING OXYCHLORIDE OFMAflNESIUM. Equivalents of MgO p. i- Equivalent of CI in the Oxychloride. Percentage of el in theOxyohloride. Percentage of1I,0 in the< Ixychloride. = -V~il Z-z - - -- z3 c pit Wet. Wet. Dry. Wet. Dry. S X 1-333 2673 32 89 11-27 30-89 112 ii 1391 1-511 2591 32-05 IIOT 29*81 1-67 in 1313 1-531 25-80 ::j ::i 15-93 -J7-<17 7 13 Bj 1-316 .ii 16 33-30 I516 27-ii9 0 60 57 During this operation the oxychloride loses GO to65 per cent, of its
Journal . apparatus. The followingtable will indicate the results of this process ofdesiccation :— TABLE A. RESULTS OF DRYING OXYCHLORIDE OFMAflNESIUM. Equivalents of MgO p. i- Equivalent of CI in the Oxychloride. Percentage of el in theOxyohloride. Percentage of1I,0 in the< Ixychloride. = -V~il Z-z - - -- z3 c pit Wet. Wet. Dry. Wet. Dry. S X 1-333 2673 32 89 11-27 30-89 112 ii 1391 1-511 2591 32-05 IIOT 29*81 1-67 in 1313 1-531 25-80 ::j ::i 15-93 -J7-<17 7 13 Bj 1-316 .ii 16 33-30 I516 27-ii9 0 60 57 During this operation the oxychloride loses GO to65 per cent, of its water ; at the same time it disen-gages in the state of HCI from 5 to 8 per cent, of itsohlorine. The dried product is therefore richer inmagnesia than the original material. Thus 100 oforiginal oxychloride, of which the analysis is givenabove under Preparation of Oxychloride of Magne-sium, is reduced by drying to ;;: 36, formed of :— THE JOURNAL OF TUT SOCIETY OF CHEMICAL rNDUSTRY. 71. E2 780 HIE JOURNAL OF THE SOCIETY OF CHEMICAL INDUSTRY. [, 1887, I 00 Water MM MgCl, 82-69 (( I .113) .. 20-81 73-30 and of which the centesimal composition is :— 5t7 Water 21-62 MeCl. (Cl=3330percent.) MgO 28-36 1-M1 equivalents per MgClt. 10000 As 100 parts of oxychloride before drying containedof Cl 26*16. and have been reduced to 733G partscontaining CI :i4-i:i, the drying has caused a loss of Cl173. Say that 6 6 per cent of the CI put in work havebeen lost in this operation. This loss will hardlyexceed 8 per cent. We shall have occasion to speakof this further on. Fifth Operations-Decomposition of Oxychlorideof Magnesium The first idea which occurs to ones mind for carry-ing out this operation is to employ an apparatusa utlagous to a retort, heated externally, into whichthe dried oxychloride should be charged and air passedthrough. But this method of working was imprac-ticable for several reasons, the chief one beingthat bothma
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