(under subclass 512.1) Products or processes wherein the compound also contains both a metal and the ammonium (NH4[supscrpt]+[end supscrpt]) radical in addition to sulfur and oxygen.
(1) Note. Examples of the compounds included in this subclass are K NH4 SO4, (NH4)2 H2ZrO(SO4)3 and 5 K2SO4 (NH4)2SO4.
(2) Note. Many of the ammonium and metal containing compounds belong to the class known as alums which are double salts of the general formula M'M" (SO4)2. 12H2O) where M' may be certain univalent cations (e.g., Na, K, NH4+, Li, Ag, etc.) and M''' may be certain trivalent cations (e.g., A1, Ga, Ti, Fe, Cr, etc.).
SEE OR SEARCH THIS CLASS, SUBCLASS:
114, for recovery of compounds containing ammonium and aluminum where the starting material is a mixture or an ore.
