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85 results about "Disperse orange" patented technology

Disperse Orange 1 (4-anilino-4'-nitroazobenzene) is an azo dye. Commercial samples contain approximately 25% dye by weight, with the remaining mass consisting of NaCl and other salts.

One-pot-method synthesis process for disperse orange 288

The invention relates to a one-pot-method synthesis process for disperse orange 288. The synthesis process comprises the following specific steps: (1) carrying out diazotization: adding p-nitroaniline into a proper volume of water, introducing a certain volume of sulfur trioxide gas into the water, carrying out pulping, adding a proper volume of ice into the pulp so as to cool the pulp to a temperature below 0 DEG C, rapidly adding a proper volume of 30% (mass percent) sodium nitrite solution into the cooled pulp, carrying out heat preservation, carrying out a test by adopting potassium iodide test paper (a reaction ends when the test paper becomes blue), adding a proper volume of aminosulfonic acid into the reacted solution so as to remove superfluous sodium nitrite, and adding a certain volume of OP-10 and Peregal O into the reacted solution; and (2) carrying out coupling. The synthesis process has the beneficial effects that the product, i.e., the disperse orange 288 is prepared through taking p-nitroaniline as a raw material, subjecting sulfur trioxide and sodium nitrite to a diazotization reaction and carrying out one-pot-method coupling with N-cyanoethyl-N-benzylaniline, the process operation is simple and convenient, the product is high in yield and high in purity, and the volume of waste gases, waste water and waste residues is small, so that environment-friendly and clean production is achieved.
Owner:浙江永合新材料科技有限公司
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