Patent ID: 6756485
Filing Date: 2004-06-29
Classification: C09B,G03G

Abstract:
A process for preparing a metal complex salt compound of formula (I): whereinR is a normal or branched alkyl group having 4-12 carbon atoms; Y is a halogen atom or a normal or branched alkyl group having 1-5 carbon atoms; each of p and q shows the number of corresponding monoazo compounds coordinated to the metal M; such that p is 1, 2, 3 or 4; q is 0, 1, 2 or 3; and the sum of p+q is an integer of 1-6; each of L1 and L2 is â€”Oâ€”; one of L3 and L4 is â€”Oâ€”, while the other is an â€”OH group or an â€”Oâˆ’ ion; M is iron, nickel, aluminum, titanium or zirconium; (Mx+)m represents an m number of metals of atomic valence x; such that m is an integer of 1-4; and x is an integer of 2 or more; Zâˆ’ is the negative charge in the parentheses; and (A+)n is a hydrogen ion or an alkali metal ion; and n=Z; which comprises a step of metallizing a monoazo compound of formula (II): wherein R and Y are the same as defined above;with iron, nickel, aluminum, titanium or zirconium to produce a metal complex salt compound in a metallizing reaction in which a monohydric alcohol is used as solvent, whereby to obtain a metal complex salt compound of not less than about 90% purity.