Process of preparing non-cyclic polyalkylenepolyamines employing group VB metal catalysts

US5011999A · kind A · utility

Assignee

• THE DOW CHEMICAL COMPANY · US

Inventors

• Robert G. Bowman · Midland, US
• George E. Hartwell · Midland, US
• David C. Molzahn · Midland, US
• Enrique G. Ramirez · Lake Jackson, US
• John E. Lastovica, Jr. · Lake Jackson, US

Key dates

• Filing date: Feb 23, 1989
• Grant date: Apr 30, 1991
• Expiry date: Feb 23, 2009

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C209/16
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for the preparation of predominantly non-cyclic polyalkylenepolyamines comprising contacting a difunctional aliphatic alcohol with ammonia or a primary or secondary aliphatic amine in the presence of a catalyst selected from the group consisting of Group VB metal oxides, niobium phosphates, tantalum phosphates, and mixtures thereof. For example, monoethanolamine is aminated by ethylenediamine to predominantly linear and branched polyethylenepolyamines in the presence of a catalyst containing niobium oxide supported on boehmite alumina.