Reppe
Reppe :
A family of processes for making a range of aliphatic compounds from acetylene, developed by W. Reppe in IG Farbenindustrie, Germany, before and during World War II. In one of the processes, acetylene is reacted with carbon monoxide to yield acrylic acid: CH+CH + CO + H2O CH2+CH+COOH → Acrylic esters are formed if alcohols are used instead of water: CH+CH + CO + ROH CH2+CH+COOR → Nickel carbonyl is the catalyst for these reactions. In another Reppe process, acetylene is reacted with formaldehyde to yield butyndiol, which can be converted to butadiene for the manufacture of the synthetic rubber “Buna”; the catalyst is nickel cyanide: HOCH2+C+C+CH2OH CH+CH + 2CH2O → + +. (Check source for accuracy of chemical formula)
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