Process for aryl-quinone and aryl-naphthoquinone diazide sulfonic acids
A process for the preparation of aryl-diazide-sulfonic acids by a series of sequential in-situ process steps. The process comprises the nitrosation of a hydroxyarylsulfonic acid; conversion of the nitroso-derivative to a sulfamate which is then diazotized to the diazide. Temperature and pH are maintained in predetermined ranges to maintain the reaction products in solution without the formation side-products or the need to isolate intermediates. The process of the invention is particularly useful in the preparation of light-sensitive materials such as naphthoquinonediazide sulfonic acids which are used in the preparation of photoresist compositions. The invention provides a high purity product at a high material efficiency, high equipment utilization, low effluent discharge, and reduced cost.
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(2008/06/13)
MATHEMATICAL MODELLING OF THE KINETICS OF THE HETEROGENEOUS SULFONATION OF 2-NAPHTHOL WITH SULFURIC ACID
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Radyshevskaya, O. N.,Gordeev, L. S.,Darmanyan, A. P.,Tyabin, N. V.
p. 1412 - 1416
(2007/10/02)
Barium laked phenylazonaphthalene dye containing sulfonic acid groups
Azo dyes containing sulfonic acid groups laked with barium and derived from an anilinesulfonic acid as diazo component and a β-naphtholsulfonic acid as coupling component for example a dye of the formula STR1 The dyes are eminently suitable as pigments for coloring surface coating compositions, printing inks and particlarly resins.