Progress on Catalysts for The Synthesis of Acrylic Acid (Methyl Ester) By Aldol Condensation of Acetic Acid (Methyl Ester) with Formaldehyde

Abstract

: In recent years, the application of acrylic acid (methyl ester) has continuously advanced in response to the growing demand for high-quality development of chemical fibers, coatings, textiles, adhesives, absorbent resins and other industrial products. Concurrently, the necessity for environmental protection has further propelled these advancements. The preparation of acrylic acid (methyl ester) from coal-based acetic acid (methyl ester) and formaldehyde by hydroxyl aldol condensation reaction is a green synthesis route in line with China′s energy structure. Catalysts for the synthesis of acrylic acid (methyl ester) by a hydroxyl-formaldehyde condensation reaction of acetic acid (methyl ester) with formaldehyde are reviewed, primarily including catalyst types such as VPO, and metal oxide-loaded catalysts, and ionic liquids. The effects of catalyst preparation methods, addition additives and loading carriers on catalyst structure and activity are also discussed. On the basis of current research, the development trend for catalysts for hydroxyl aldol condensation reactions is prospected.