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7.
Production process
1) Sulfonation
Add 1100L of water to the sulfonation kettle, heat it to 50°C, add 119kg of light magnesium oxide under rapid stirring, and stir for a while
.
Then add 750kg of molten 2,4-dinitrochlorobenzene , continue heating to 65°C, and add 462kg of sodium bisulfite solution (prepared as a 4.
2) Restore
Add 1700L of water to the reduction pot, heat it to boiling, add 300kg of pig iron filings and 35kg of hydrochloric acid, and boil for 15 minutes
.
Under direct steam heating and boiling, slowly add 1/3 sulfonate within 1.
8.
Product Standards
9.
Quality inspection
Assay:
Accurately weigh 10g of sample (accurately to 0.
2mg), place it in a 500mL volumetric flask, add 150mL water, 30mL hydrochloric acid, and dilute to 500mL
.
Use a pipette to draw 50 mL into a 400 mL beaker, add 100 mL water, 10 mL hydrochloric acid and 10 mL 10% KBr solution, and titrate with 0.
In the formula: c—— The molar concentration of NaNO 2 standard solution, mol/L;
V 1 , V 2 ——respectively the volume of NaNO 2 consumed in the sample and blank experiment , mL;
G——The mass of the sample, g
.
10.
Product use
Dye intermediates
.
It is used to produce Reactive Brilliant Yellow X-6G, Reactive Brilliant Yellow X-HG, Reactive Brilliant Blue K-6G, Reactive Yellow KD-3G, Reactive Yellow M-5G, Reactive Brilliant Blue K-BR, Reactive Brilliant Blue K-GR, Reactive Brilliant Blue blue M-BR, weak acid red FC, Mordant brown RH and the like
11.
Safety measures
(1) This product is toxic, and the raw material 2,4-dinitrochlorobenzene is also toxic
.
The production process equipment must be sealed to prevent leakage, and the operator should wear labor protection equipment
(2) Packed in iron drums, with obvious "drug" signs, stored in a cool, ventilated, dry place, away from fire and heat sources, and stored separately from oxidants, acids, and flammable products
.
Store and transport in accordance with toxic chemicals regulations