PROCESS FOR HETEROGENEOUSLY CATALYZED PARTIAL GAS PHASE OXIDATION OF PROPYLENE TO FORM ACRYLIC ACID

• Main Authors: DIETERLE MARTIN, JOCHEN PETZOLDT, DIEFENBACHER ARMIN, MULLER-ENGEL KLAUS JOACHIM
• Format: Patent
• Language: English
• Published: 21.08.2014
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; APPARATUS THEREFOR; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; GENERAL METHODS OF ORGANIC CHEMISTRY; METALLURGY; ORGANIC CHEMISTRY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR RELEVANT APPARATUS; TRANSPORTING

PROBLEM TO BE SOLVED: To provide a process for heterogeneously catalyzed partial gas phase oxidation of propylene to form acrylic acid in the presence of propane as an inert diluent gas.SOLUTION: A starting reaction gas mixture comprising propylene, molecular oxygen, and inert diluent gas propane with a molar O2:C3H6 ratio of 1 or greater is conducted through at least one first catalyst bed whose catalysts have at least one multimetal oxide comprising Mo, Fe and Bi, and a product gas mixture is made with the byproduct cyclopropane content of 3 mol% or less based on the molar amount of propane contained in the starting reaction gas mixture 1, to proceed to a further reaction.