> . >2. Production principle>It is prepared by neutralizing 2-chloro-5-nitrobenzenesulfonic acid with
Production process and product standard of 2-methyl-5-nitroaniline
Time of Update: 2021-08-29
6. Production process1) Salt formationPut 98% concentrated sulfuric acid from the metering tank into the nitrification pot, cool the temperature to 0-25°C, add o-methylaniline under stirring , maintain this temperature, and stir until it is completely dissolved .
Product performance and production principle of 2-methyl-5-nitroaniline
Time of Update: 2021-08-29
2-methyl-5-nitroaniline (2-methyl-5-nitroaniline ) , also known as big red group G, red bass, bass red flag, of the formula C .
Product standards and uses of 2-hydroxy-3-naphthoyl o-ethoxyaniline
Time of Update: 2021-08-28
7. Laboratory preparation methodAdd 160 g of solvent chlorobenzene to the reaction flask, and then add 45 g (calculated as 100%) of 2-hydroxy-3-naphthoic acid .
2-Hydroxy-3-naphthoyl o-toluidine and product performance and production principle
Time of Update: 2021-08-28
Then, 2-hydroxy-3-naphthoate sodium (2,3-sodium) is condensed with o-toluidine under the catalysis of phosphorus trichloride , and the product is obtained by neutralization, desolvation, filtration and drying .
Product performance and production principle of 2-amino-5-naphthol-7-sulfonic acid
Time of Update: 2021-08-28
Amino-5-naphthol-7-sulfonic acid (2-amino-5-naphthol -7-sulfonic acid) , also known as J acid, 6-amino-1-naphthol-3-sulfonic acid, C of the formula
2-Hydroxy-3-naphthoyl o-toluidine and its production process and product standards
Time of Update: 2021-08-28
Before the end of the free base titration (pH 13), gradually add the standard hydrochloric acid solution in portions, dropping about 0.
Production principle of 2-hydroxy-3-naphthoyl o-anisidine
Time of Update: 2021-08-28
Add 1000L of water and 330L of 30% liquid caustic soda into the still, and then press the above condensate into it .
Product standards and uses of 2-hydroxy-3-naphthoyl o-anisidine
Time of Update: 2021-08-28
1mo/L hydrochloric acid standard solution consumed when titrating free alkali, mL;V 2 ——The volume of 0.
Production principle and technical formula of 2-hydroxy-3-naphthoyl-1-naphthylamine
Time of Update: 2021-08-28
Add 2000L of water and 300L of 30% liquid caustic soda in the distillation kettle, and then press in the above-mentioned condensed materials .
Product performance of 2-hydroxy-3-naphthoyl o-ethoxyaniline
Time of Update: 2021-08-28
After the addition is complete, stir for 15 minutes, and then uniformly add 275 kg of 60% phosphorus trichloride-chlorobenzene mixture within 1.
Product performance and production principle of 2-hydroxy-3-naphthoyl meta-nitroaniline
Time of Update: 2021-08-28
Add 2200L of water and 130kg of soda ash to the neutralization pot, and press the above condensate into it with stirring .
Production process and product standard of 2-amino-5-naphthol-7-sulfonic acid
Time of Update: 2021-08-28
In the hydrolysis pot, pre-add the last batch (hydrolyzate) filtered lotion, water and liquid caustic soda, add sulfuric acid to prepare a solution containing sulfuric acid (130±30) g/L and sodium sulfate (160±30) g/L .
