Process for the preparation of 2-methyl-2,4-diaminopentane

US5801285A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Helmut Waldmann · Leverkusen, DE
• Jurgen Dahmer · Krefeld, DE
• Anatoly Bazanov · Saint Petersburg, RU
• Alexandre Timofeev · Saint Petersburg, RU
• Natalja Zubritskaya · Saint Petersburg, RU
• Gennady Terechtchenko · Saint Petersburg, RU

Key dates

• Filing date: Oct 31, 1997
• Grant date: Sep 1, 1998
• Expiry date: Oct 31, 2017

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C209/62
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The present invention relates to a process for preparing 2-methyl-2,4-diaminopentane by introducing acetone, ammonia and hydrogen into a two-zone reactor at a temperature of 20.degree. to 130.degree. C. and a pressure of 30 to 250 bar, wherein the first zone contains a cationic exchange resin containing NH.sub.4.sup..sym. groups or an aluminum oxide and/or silicon oxide catalyst and the second zone contains a hydrogenation catalyst containing nickel.