Note 16 bis — Chapter XII · SODIUM
George Kamensky translation
Mond (see Chapter XI., Note 3 bis) separates the NH4Cl from the residual solutions by cooling (Chapter X., Note 44); ignites the sal-ammoniac and passes the vapour over MgO, and so re-obtains the NH3, and forms MgCl2: the former goes back for the manufacture of soda, while the latter is employed either for making HCl or Cl2.