Preparation of acrolein or methacrolein by actalytic gas-phase o

Details Preparation of acrolein or methacrolein by actalytic gas-phase o Preparation of acrolein or methacrolein by actalytic gas-phase o

1991-07-19

1992-09-01

Lone, Werren B.

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

568470, 568475, 568476, C07C 4535

Patent

active

051440911

ABSTRACT:
A process for the catalytic gas-phase oxidation of propene or isobutene to acrolein or methacrolein in a tubular fixed bed reactor or catalytically active oxides with a .gtoreq.90% conversion of the initial olefin on a single passage, wherein the temperature of the gases containing the reactants in the direction of flow along the tubes from their entrance until the conversion of the initial olefin is from 30 to 70% is from 360.degree. to 420.degree. C. and is then adjusted to from 360.degree. to 300.degree. C. until the conversion of the initial olefin is from 80 to 90% and is thereafter maintained at from 330.degree. to 390.degree. C. until the gases emerge from the tubes, is described.

REFERENCES:
patent: 3801634 (1974-04-01), Krabetz et al.
patent: 4837360 (1989-06-01), Kadowaki et al.

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