Use of transition metal complexes having oxime ligands as bleach catalysts

US6746996B2 · kind B2 · utility

Assignee

• Clariant Corporation · DE

Inventors

• Gerd Reinhardt · Kelkheim, DE
• Michael Seebach · Hattersheim, DE
• Nicole Anja Reichardt · Pocking, DE
• Laszlo Simandi · Budapest, HU
• Tatiana M. Simandi · Budapest, HU
• Gabor Besenyei · Budakalász, HU

Key dates

• Filing date: Jan 17, 2002
• Grant date: Jun 8, 2004
• Expiry date: Oct 29, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C11D3/3932
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Transition metal complexes used as bleach catalysts of the formula (1)M(L)nXm  (1)whereM is a metal atom from the group Mn, Fe, Co, Ni, Mo, W,L is a ligand of the formulaR1R2C═N—O(H)zR1 is C1-C22-alkyl, C2-C22-alkenyl or C5-C24-aryl,R2 is H, C1-C22-alkyl, C2-C22-alkenyl, C5-C24-aryl or where z=0 or 1,X is a neutral or anion ligand from the group consisting of pyridines, imidazolines, methylimidazoles, picolines, lutidines, chloride, bromide, nitrate, perchlorate, citrate, hexafluorophosphate or anions of organic acids having C1-C22 carbon atoms, n is a number from 2 to 4 and m is a number from 0 to 4.