Brin
Brin : An obsolete process for making oxygen. Barium monoxide was roasted in air to produce barium peroxide, which was roasted at a higher temperature to produce oxygen: 2BaO + O2 + 2BaO2 ? 2BaO2 + O2 + 2BaO. The process was developed in France by the brothers L. and A. Brin, based on a chemical reaction discovered by J. B. J. D. Boussingault in 1851. Boussingault used temperature cycling between 537 and 926?C, which caused a progressive loss in the efficiency of the barium oxide. The Brin brothers used pressure cycling at a lower temperature, which overcame this problem. (Check source for accuracy of chemical formula)
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