in methanol; water treatment of 1 mol NaCl with 2.5-3 mol H3PO4 at 130 °C while passing moist air; crystn. of NaH2PO4*H3PO4 on cooling, decompn. with methanol;;
sulfur dioxide in water the mixture of components is melted at 1000°C for several hours, ground in H2O; SO2 is introduced until the melting product is completely disintegrated;;
sulfur dioxide in water the mixture is melted in presence of reducing agents, ground in H2O; SO2 is introduced until the melting product is completely disintegrated;;
hydrogenchloride; sulfuric acid in water byproducts: CaSO4; decompn. of Ca3(PO4)2 with HCl and pptn. of Ca(2+) with H2SO4; heating H3PO4 soln. with NaCl until all HCl is exhausted;;
参考文献
Na: MVol., 43.4, page 175 - 177
EP4371 , ;
Handbuch der Soda-Industrie und ihrer Nebenzweige, 3. Aufl., Friedr. Vieweg und Sohn, Braunschweig 1909, Bd. 3, S. 202
