Intermediate
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2-Amino-p-cresol
Used as a dye intermediate, and also used in the preparation of fluorescent whitening agent dye intermediates, and used in the production of fluorescent whitening agent DT.
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O-Amino-p-Chlorophenol
Production of 2-nitro-p-chlorophenol: Using p-chlorophenol as raw material, nitrification with nitric acid. Add the distilled p-chlorophenol slowly into the stirred tank with 30% nitric acid, keep the temperature at 25-30℃, stir for about 2 hours, add ice to cool to below 20℃, precipitate, filter, and wash the filter cake to Congo Red, the product 2-nitrop-chlorophenol is obtained.
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O-Amino-P- Butyl Phenol
To make fluorescent whitening agents OB, MN, EFT, ER, ERM and other products.
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Phthalaldehyde
Analytical reagents in the chemical field: as an amine alkaloid reagent, it is used to determine primary amine and peptide bond decomposition products by fluorescence method. 2. Organic synthesis: also a pharmaceutical intermediate. 3. Fluorescent reagent, used for pre-column HPLC separation of amino acid derivatives and flow cytometry to measure the thiol group of protein.
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Sodium o-Sulfonate Benzaldehyde
For the synthesis of fluorescent whitening agent CBS, triphenylmethane dye and mothproofing agent N
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O-toluenenitrile
Used as the main raw material for the production of fluorescent whitening agents, and can also be used in the dye, medicine, rubber and pesticide industries.
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Ophthalic Acid
The preparation method is that the o-xylene is continuously oxidized with air in the presence of a cobalt naphthenate catalyst at a reaction temperature of 120-125°C and a pressure of 196-392 kPa in an oxidation tower to obtain a finished product.
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O-methoxybenzaldehyde
From salicylaldehyde by methylation reaction with dimethyl sulfate. Mix 3kg of sodium hydroxide into a 30% aqueous solution, add 12.2kg of salicylaldehyde and 80L of water under stirring, and heat to boiling. Slowly add 12.9kg of dimethyl sulfate, keep the reaction solution refluxed for about 3h after adding, continue to reflux for 2-3h following Chemicalbook…
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O-Nitro-p-cresol
This product is an organic intermediate. Used in the production of dyes, fluorescent whitening agent DT, herbicides, etc.
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O-Nitro-p-tert-butylphenol
After reduction, it can be used to make a series of high-grade optical brightener agent, such as optical brightener agent OB.
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O-nitrophenol
o-nitrochlorobenzene is hydrolyzed and acidified by sodium hydroxide solution. Add 1850-1950 l of 76-80 g / L sodium hydroxide solution into the hydrolysis pot, and then add 250 kg of fused o-nitrochlorobenzene. When it is heated to 140-150 ℃ and the pressure is about 0.45MPa, keep it for 2.5h, then raise it to 153-155 ℃ and the pressure is about 0.53mpa, and keep it for 3h.
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Ortho Amino Phenol
1. Dye intermediates, used in the manufacture of sulfur dyes, azo dyes, fur dyes and fluorescent whitening agent EB, etc. In pesticide industry, it is used as raw material of insecticide phoxim.
2. It is mainly used for making acid mordant Blue R, sulfurized yellow brown, etc. it can also be used as fur dye. In the cosmetics industry, it is used to make hair dyes (as coordination dyes).
3. Determination of silver and tin and verification of gold. It is the intermediate of diazo dyes and sulfur dyes.
