Preparation of a dye for coloring protein-based fibers and...

Details Preparation of a dye for coloring protein-based fibers and... Preparation of a dye for coloring protein-based fibers and...

C - Chemistry, Metallurgy

09

B

C09B 11/20 (2006.01) C09B 11/10 (2006.01) C09B 53/00 (2006.01) C09B 59/00 (2006.01) D06P 3/24 (2006.01) D06P 3/60 (2006.01)

Patent

CA 2246032

A process of preparing a dye composition and a resultant dye composition. The process includes preparing a mixture comprising a triphenylmethane dye and oxidation products by reacting methylenedianiline, aniline, an oxidation catalyst, and an oxidant; separating the oxidation products from the triphenylmethane dye to produce an aqueous solution of oxidation products; treating the solution of oxidation products with a basic compound; separating unreacted aniline from the solution of oxidation products and forming a mixture of oxidation products; and sulfonating the mixture of oxidation products to form a dye composition.

Processus de préparation d'une composition de teinture et composition de teinture obtenue. Le processus comprend la préparation d'un mélange constitué d'un colorant du groupe du triphénylméthane et de produits d'oxydation en faisant réagir du méthylènedianiline, de l'aniline, un catalyseur d'oxydation et un oxydant; en séparant les produits d'oxydation du colorant du groupe du triphénylméthane afin de produire une solution aqueuse des produits d'oxydation; en traitant la solution des produits d'oxydation avec un composé basique; en séparant l'aniline n'ayant pas réagi de la solution des produits d'oxydation et en formant un mélange des produits d'oxydation; et en procédant à la sulfonation du mélange des produits d'oxydation pour obtenir une composition de teinture.

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