100983-92-4

Upstream product

• 75-21-8 oxirane 
• 61886-18-8 2-chloro-5-nitrobenzene sulfinic acid 
• 4533-95-3 5-nitro-2-chlorobenzenesulfonyl chloride 
• 96-73-1 2-chloro-5-nitro-benzenesulfonic acid 
• 107737-87-1 2-(2-chloro-benzenesulfonyl)-ethanol 

Downstream Products

• 105652-75-3 4-(β-aminoethylamino)-3-(β-hydroxyethylsulfonyl)-nitrobenzene 

Relevant academic research and scientific papers

Novel brilliant blue dye intermediate, reactive brilliant blue dye as well as preparation method and application of reactive brilliant blue dye

The invention discloses a novel brilliant blue dye intermediate, a reactive brilliant blue dye as well as a preparation method and application of thereactive brilliant blue dye, and relates to the field of reactive dyes. The preparation method of the reactive brilliant blue dye comprises the steps of a, Ullmann condensation, b, esterification and c, condensation. The reactive brilliant blue dye product prepared by the invention is high in solubility, strong in reactivity and high in fixation rate, is suitable for dip dyeing, pad dyeing and cold batch dyeing, and can reduce environmental pollution.

Dye intermediate (3-beta-hydroxyethylsulfonyl)aniline-4-aminoacetic acid and preparation method thereof

The invention relates to a dye intermediate (3-beta-hydroxyethylsulfonyl)aniline-4-aminoacetic acid and a preparation method thereof. The dye intermediate, (3-beta-hydroxyethylsulfonyl)aniline-4-aminoacetic acid, is represented as the structure formula (I). The preparation method includes the steps of: chlorosulfonation of 2-chloro-5-nitrobenzenesulfonic acid, reduction by sodium sulfite, hydroxyethylation, a condensation reaction with aminoacetic acid, hydrogenation reduction of the nitro group, and the like. The novel dye intermediate, compared with common dye intermediates, can greatly improve the water solubility of a dye, and reduces production cost and reduces environment pollution.

Novel dye intermediate and active dye prepared from dye intermediate

The invention relates to a novel dye intermediate and active dye prepared from the dye intermediate. The dye intermediate has the structural formula shown as a formula in the accompanying drawing. The dye intermediate has the advantages that on the basis of meta-position oil of the common dye intermediate, para aminobenzoic acid is used for condensation, so that the goal of introducing the benzoyloxy is achieved. The color of the prepared dye is more vivid; the solubility is better.

Process for the preparation of 3-aminophenyl 2-hydroxy-ethyl sulphone

3-Aminophenyl 2-hydroxyethyl sulphone (I) can be prepared in a high yield and purity by treating 2-chloro-5-nitrophenyl 2-hydroxyethyl sulphone (II) or 4-chloro-3-nitrophenyl 2-hydroxyethyl sulphone (III) with hydrogen in the presence of hydrogenation catalysts in an aqueous or aqueous organic medium. (II) is obtained by reducing 2-chloro-5-nitrobenzenesulphochloride with sodium sulphite and subsequently reacting the product with ethylene oxide.