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C
CAA [Cuprous Ammonium Acetate] A general process for separating alkenes, dialkenes, and alkynes
from each other by extraction of their cuprous complexes from aqueous cuprous ammonium acetate into an
organic solvent. Exxon used it for separating C
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fractions containing low concentrations of butadiene. The
liquid–liquid extraction processes for butadiene have all been replaced by extractive distillation processes.
U.S. Patents 2,369,559; 2,429,134 (Jasco): 2,788,378 (Polymer Corp.); 2,847,487; 2,985,697; 3,192,282 (Esso).
Morrell, C.E., Palz, W.J., Packie, J.W., Asbury, W.C., and Brown, C.L., Trans. Am. Inst. Chem. Eng., 1946, 42, 473.
Weissermel, ...