Production of unsaturated acids, esters and nitriles, and cataly

Details Production of unsaturated acids, esters and nitriles, and cataly Production of unsaturated acids, esters and nitriles, and cataly

1972-10-06

1976-01-20

Brust, Joseph Paul

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

2604055, 260486R, 260526N, 252426, 252438, C07C12000, C07C 6952, C07C 6954, C07C 5702

Patent

active

039338886

ABSTRACT:
Alkanoic acids, esters of such acids, and alkyl nitriles are reacted with formaldehyde in the presence of a basic catalyst comprising pyrogenic silica to form .alpha.,.beta.-unsaturated acids, the esters of such unsaturated acids or .alpha.,.beta.-unsaturated nitriles. The pyrogenic silica is especially effective when treated with activating agents which provide basic sites on the pyrogenic silica catalyst support, such as organic bases, inorganic bases of Groups IIA and IIIA metals, and precursors of such bases.

REFERENCES:
patent: 3247248 (1966-04-01), Sims et al.
patent: 3535371 (1970-10-01), Wolf et al.
patent: 3574703 (1971-04-01), Hagemeyer, Jr. et al.
patent: 3578702 (1971-05-01), Snapp, Jr. et al.
patent: 3840587 (1974-10-01), Pearson

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