Preparation of brilliant blue KN-R

[0011] 1. Ingredients list:

[0012] raw material name molecular weight molecular ratio Percent consumption (Kg) Feeding amount (mole) bromide 404 1.0 80.8 0.2 meta oil 201 1.2 48.2 0.24 sodium bicarbonate 84 4.0 67.2 0.8 Cuprous chloride 199 0.05 1.99 0.01 Electrolytic copper powder 64 0.15 0.4 0.0063 sulfuric acid 98 40.8 800 8.16 DMF (Dimethylformamide) 1.2

[0013] 2, dyestuff preparation technology of the present invention operates as follows:

[0014] (a) Condensation: Dissolution of bromaline and meta-oil: add 200ml of bottom water to a four-neck bottle, add 80.8g of bromaline and 48.2g of meta-oil, raise the temperature, control the temperature to 95°C, and dissolve all the materials , keep warm for 10 minutes, lower the temperature to 80°C to obtain a mixed solution; dissolve 1.99g of cuprous oxide in 1.2g of DMF, then add it and 0.4g of electrolytic copper powder into the above mixed