Process for the continuous diazotization of water-soluble polymeric amines
AssigneeDynapol
InventorsPhillip J. Brock, Daniel J. Dawson
Life of this patent
Estimating the term…
Abstract
An improvement in the diazotization of polymeric amines is disclosed that minimizes crosslinking problems. Solutions of nitrite ion and polymeric amine are concurrently continuously fed at controlled rates to a turbulently agitated limited volume mixing zone.
Claims6
In a process of diazotizing a polymeric aromatic amine wherein a solution of the polymeric amine is admixed with a solution of nitrite ion, the improvement comprising continuously feeding said solutions to a turbulent reaction zone at a combined liquid flow rate of not less than one reaction zone volume per minute and continuously withdrawing the resulting reaction product to maintain the reaction zone liquid volume.
The process of diazotization of a polymeric aromatic amine salt of the formula ##STR37## wherein n is an integer greater than 1 and X.sup.- is a halogen anion which comprises feeding a 0.5% to 10% by weight solution of said polymeric aromatic amine salt and a separate solution of 1 to 1.35 equivalents of nitrite ion to a turbulent reaction zone at a combined liquid flow rate of not less than 1 reaction zone volume per minute and a pH of from pH 0 to pH 4 and a reaction temperature of from -5.degree. C. to 50.degree. C. and continuously withdrawing the resulting reaction product to maintain the reaction zone liquid volume.
Dependencies are inferred from the claim text.