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Factors influencing the reduction of barium sulphate
Author(s) -
Hargreaves Keith,
Murray David M.
Publication year - 1989
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.280450409
Subject(s) - barium oxide , barium , yield (engineering) , ferric , inorganic chemistry , impurity , oxide , barium sulfate , chemistry , nuclear chemistry , materials science , metallurgy , organic chemistry
The reduction of pure barium sulphate and of barytes to barium sulphide and soluble barium compounds has been carried out in an indirectly heated tube furnace using carbon as the reducing agent. Increasing the reduction temperature increases the yield of barium compounds. The best yield is obtained with a reduction period of 1–2 h at 850–1100°C, while excluding air during the reduction and subsequent cooling process. The influence of ferric oxide and silica impurities on the yield of soluble barium products has been studied at a reduction temperature of 1000°C. Both reduce the yield of soluble barium products, ferric oxide having a much greater effect. The effect of these two impurities is not additive, silica minimizing the effect of ferric oxide.