Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
1975-04-21
1978-08-29
Helfin, Bernard
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
C-metal
260598, 260599, 568700, 568813, 568828, 568879, C07C 4500
Patent
active
041104030
ABSTRACT:
A process for preparing .beta.,.gamma.-unsaturated aldehydes which comprises dehydrogenating .beta.,.gamma.-unsaturated alcohols in the vapor phase, preferably in the substantial absence of oxygen, using copper having a specific surface area of 0.01 to 1.5 m.sup.2 /g as a catalyst at a temperature of 150.degree. to 300.degree. C. The .beta.,.gamma.-unsaturated aldehydes can be recovered in pure form by distilling the dehydrogenation reaction mixture in the presence of water. The starting .beta.,.gamma.-unsaturated alcohols can be prepared by reacting olefins with formaldehyde or a derivative capable of forming formaldehyde at a temperature of 180.degree. to 400.degree. C. in the absence of a solvent or in the presence of a non-aqueous organic solvent after pre-heating said formaldehyde or derivative to a temperature of 85.degree. to 150.degree. C.
REFERENCES:
patent: 2042220 (1936-05-01), Groll et al.
patent: 2308192 (1943-01-01), Mikesko et al.
patent: 2335027 (1943-11-01), Ritter
Ichikawa Yataro
Kobayashi Osamu
Naruchi Tatuyuki
Soma Kazuhiko
Suzuki Nobuo
Helfin Bernard
Teijin Limited
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