Products

1, 4-catechol is widely used as an important raw material, intermediate and auxiliary agent in medicine, pesticide, dyestuff and rubber, mainly used in developing agent, anthraquinone dye, azo dye, rubber anti-aging agent and monomer polymerization inhibitor, food stabilizer and coating antioxidant, petroleum anticoagulant, synthetic ammonia catalyst and so on.  Hydroquinone is mainly used as a developer in photography.  Hydroquinone and its alkylates are widely used as polymer-blocking agents added in the process of monomer storage and transportation, and the commonly used concentration is about 200ppm.  Hydroquinone monomethyl ether is the intermediate of edible oil antioxidant BHA.  Benzene Chemicalbook dimethyl ether is the intermediate of dyes, organic pigments and spices;  Hydroquinone diethyl ether is the intermediate of photosensitive pigment and dye.  Hydroquinone is also used in the preparation of N, N' -diphenyl-p-phenylenediamine, is used in rubber and gasoline antioxidant and deodorant.  Hydroquinone has been produced by aniline method before, and now the industrial production has also developed catechol co-production, isopropylbenzene and bisphenol A method.  Aniline method is still used in China.  1. Aniline was oxidized to benzoquinone by manganese dioxide in sulfuric acid medium, and then reduced to hydroquinone by iron powder.  After concentration, decolorization, crystallization, drying finished products.  Industrial grade hydroquinone Chemicalbook content ≥99%, photographic grade ≥99.5%.  Raw material consumption quota: aniline 1250kg/t, sulfuric acid (93%) 5500kg/t, pyrolusite powder (including manganese dioxide 60-65%) 5950kg/t, iron powder (containing Fe≥90%) 540kg/t.  2. Nitrobenzene as raw material, after hydrogenation, heating system.