Method for Preparation of Metal Free phthalocyanines by reaction of an Ortho ftalodinitrilo in a Solvent at least 120 degrees Celsius in the presence of ammonia and a metal hydroxideLcalino or carbonate of alkali metal.

摘要

The present Invention relates to a method for preparing metal phthalocyanines of formula IBy reaction of an Ortho ftalodinitrilo of the formula in aSolvernte Inert with a Boiling temperature of at least 120 degrees C (at normal pressure in presence of ammonia, wherein in the formula I, the variable n can take the values 1,2, 3 or 4 and the Radicals R designates a saturated Heterocyclic Ring of five or six members with nitrogen content optionally substituted with one or two alkyl groups C1 C8That is attached to the benzene Ring through a nitrogen atom of the ring and may also contain one or two nitrogen ATOMS, or another Oxygen Atom or a SulfurWhich is characterized in that the Reaction is carried out in the presence of an alkali metal carbonate or hydroxide of an alkali metal.