It has been discovered that the addition of copper punchings to small quantities of the reaction mixture of 95 per cent ethyl alcohol, sulfuric acid, water, and sodium bromide increases the yield of ethyl bromide from 57 per cent obtained without the copper to 80 per cent. The copper reacts with the sulfuric acid producing sulfur dioxide which reduces any bromine formed back to bromide ion and thus prevents a loss of bromine and, of course, increases the yield. The presence of copper as a reducing agent prevents formation of free bromine.
Proceedings of the Iowa Academy of Science
©1934 Iowa Academy of Science, Inc.
"Use of Copper to Increase the Yield of Ethyl Bromide,"
Proceedings of the Iowa Academy of Science, 41(1), 165-165.
Available at: https://scholarworks.uni.edu/pias/vol41/iss1/45