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a nonplanar molecule

hydrogen chloride into the catholyte, while cool
ing, in a special vessel outside the cell, and thus
precipitating the hydroxylamine hydrochloride;
?ltering the precipitated hydroxylamine hydro
chloride from the mother liquor and drying the ‘
?ltered salt, restoring the mother liquor to its
original nitric acid strength and returning the same as catholyte to the cathode compartment
of the diaphragm cell. – 3. In the process of preparing solid hydroxyl
amine hydrochloride by reduction of aqueous
solutions of mixtures of hydrochloric acid and
nitric acid in diaphragm cells by direct current
electrolysis to ‘such an extent that the catholyte
in the cathode compartment of these cells is
nearly saturated with hydroxylamine hydrochlo
ride, the step which comprises removing the
‘ catholyte from the cell, introducing gaseous hy
drogen chloride into the catholyte, while cool
ing, in a special vessel outside the cell, and-thus
precipitating the hydroxylamine hydrochloride,
?ltering the precipitated hydroxylamine hydro
chloride from the mother liquor and drying the
?ltered salt, adding a quantity of 90 per cent
nitric acid to the mother liquor suf?cient to bring
its nitric acid content to that of the original
catholyte and returning the treated mother
liquor’as catholyte to the diaphragm cell.