Process for hydrating an unsaturated nitrile
AssigneeMitsubishi Chemical Industries Limited
InventorsTokuzo Kurata, Takeshi Okano, Kunihiko Ohfuchi, Akio Tamaru, Yoshifumi Murata, Saburo Nagashima
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Abstract
A copper catalyst obtained by reducing a copper compound with formaldehyde in the presence of an alkali in an aqueous medium is an excellent catalyst for the hydrolysis of an unsaturated nitrile to an amide. Furthermore, when a copper compound is combined with another element, which is selected from a specific group of elements, during the preparation of the copper catalyst, a catalyst is formed which has an increased hydrolysis activity and an increased catalyst lifetime.
Claims15
A process for preparing an amide, which comprises hydrolyzing acrylonitrile or methacrylonitrile to the corresponding amide in the presence of a copper catalyst obtained by reducing copper oxide, copper hydroxide, a copper salt of an inorganic acid, a copper salt of an aliphatic acid or a copper salt of an aromatic acid with formaldehyde in the presence of an alkali in an aqueous medium.
A process for preparing an amide which comprises hydrolyzing acrylonitrile or methacrylonitrile to the corresponding amide over a catalyst obtained by reducing copper oxide, copper hydroxide, or a copper salt of an inorganic acid, a copper salt of an aliphatic acid or a copper salt of an organic acid with formaldehyde in an aqueous medium containing an alkali in the presence of a compound containing an element selected from the group consisting of Group IVa and Group IVb elements having an atomic number of 14 to 82, Group Vb elements having an atomic number of 23 to 73, Group VIa elements having an atomic number of 24 to 74, Group VIIa elements having an atomic number of 25 to 75 and Group VIII elements having an atomic number of 26 to 78.
Dependencies are inferred from the claim text.