Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
1979-10-23
1981-03-03
Milestone, Norma S.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
C-metal
C07D32300
Patent
active
042540348
ABSTRACT:
A novel complex of 1,4,7,10,13,16-hexaoxacyclooctadecane (18-crown-6) and dimethylcarbonate or dimethyloxalate, containing one molecule of dimethylcarbonate or dimethyloxalate for each molecule of 18-crown-6, is useful in isolating 18-crown-6 from mixtures containing it. In the isolation or purification process described, 18-crown-6 is isolated from a mixture containing it by reacting the 18-crown-6 with dimethylcarbonate or dimethyloxalate to form a complex substantially in the form of a dispersed solid in a solution containing the non-complexed material of the mixture, separating the dispersed complex from the solution and disassociating the dimethylcarbonate or dimethyloxalate from the separated complex.
REFERENCES:
patent: 3562295 (1971-02-01), Pedersen
patent: 3687978 (1972-08-01), Pedersen
patent: 3928386 (1975-12-01), Dale et al.
patent: 3965116 (1976-06-01), Cram
patent: 3997562 (1976-12-01), Liotta
Chemical Abstracts, vol. 82, (1975), 124273d.
J. M. Timko et al., Jour. Am. Chem. Soc., vol. 99, No. 13, Jun. 22, 1977, pp. 4207-4219.
Milestone Norma S.
Shell Oil Company
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