Process for reducing sulfur and vat dyes

US6093221A · kind A · utility

Assignee

• SUDZUCKER AG · DE

Inventors

• Dietmar Grüll · Langenschönbichl, AT
• Alireza Haji Begli · Ramsen, DE
• Nikolai Kubadinow · Wien, AT
• Markwart Kunz · Worms, DE
• Mohammad Munir · Obrigheim, DE

Key dates

• Filing date: Jul 22, 1999
• Grant date: Jul 25, 2000
• Expiry date: Jul 22, 2019

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D06P1/65118
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

This invention concerns a process for reducing dyes of the group consisting of sulfur and vat dyes. The reduction is carried out in an aqueous alkali medium using isomaltulose or a mixture containing isomaltulose as the reducing agent.