carbon in neat (no solvent) redn., 750°C, diameter of C-particels about 0.4mm, 30min;;
参考文献
Nikitin, V. A.; Kunin, T. I.
Tr. Ivanovsk. khim.-tekhnol. Inst., 1956 , # 5 p. 85 - 89
C. A., 1960 , p. 12508
Full Text Show Details
Gmelin Handbook: Na: SVol.1, 48, page 207 - 209
in water 40 g Na2CO3 are dissolved in 120 cm3 H2O (air-free), SO2 is introduced till rearrangement into NaHSO3; further addn. of same amounts Na2CO3 and filtration at 100°C; all operations had to be done under an atmosphere of H2;; separation of the formed crystalls after a few hours, washing with alcohol/water, than with water and drying; the obtained product is free of sulfate;;
sulfonic acid in melt melting sulfonic acids with NaOH, addn. of SO2, separation of phenol or naphthol by distn., filtration of soln., crystn., further product on evapn. of mother-liquor;;
in water regeneration of sulfite cellulose wastes: treatment of the combustion residue with Na-zincate or Na-plumbate at 100°C under pressure, pptn. of insol. sulfides, treatment of the soln. with SO2;;
air in water apparatus for regeneration of sulfite cellulose wastes: evapn., combustion of residue (reductive), dissolving in H2O, introduction of CO2 into the soln. containing Na2S and Na2CO3, combustion of generated H2S to SO2, introduction into Na2CO3-soln.;;
air in water apparatus for regeneration of sulfite cellulose wastes: evapn., combustion of residue (reductive), dissolving in H2O, introduction of CO2 into the soln. containing Na2S and Na2CO3, combustion of generated H2S to SO2, introduction into NaHCO3-soln.;;
sodium amalgam in not given byproducts: H2O; formation is avoided by addn. of an acid; best yields and products are obtained when the concn. of Na2SO3 is below 45 g/l;;
