Manufacture of concentrated aqueous solutions of formaldehyde

US4119673A · kind A · utility

Assignee

• BASF SE

Inventors

• Albrecht Aicher · Bischofswerda, DE
• Hans Haas
• Hans Diem · Mannheim, DE
• Christian Dudeck
• Fritz Brunnmueller · Schifferstadt, DE
• Gunter Lehmann · Ludwigshafen, DE

Key dates

• Filing date: Sep 16, 1975
• Grant date: Oct 10, 1978
• Expiry date: Sep 16, 1995

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10G2300/107
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Formaldehyde is manufactured by oxidative dehydrogenation of methanol in the presence of a silver catalyst and of certain amounts of steam and formaldehyde, some formaldehyde and a part of the water being withdrawn from the reaction mixture and recycled. The formaldehyde manufactured by the process may be used as a disinfectant, tanning agent, reducing agent and starting material for the manufacture of synthetic resin, adhesives and plastics.