Vat olive MW dye with low heavy metal and preparation method of vat olive MW dye

[0030] Preparation of low heavy metal reduced olive MW dyes

[0031] a. Preparation of reduced olive MW: the chlorination pot uses jacketed hot oil to bake the pot to ensure that there is no water in the pot; add 1400kg aluminum trichloride and 300kg sodium chloride into the chlorination pot, stir evenly, and heat up to 150 ℃, heat preservation for 3 hours, after the heat preservation is over, close the hot oil circulation system, open the cold oil system to cool down the chlorination pot, cool down to 105 ℃, close the cold oil system, slowly add 50L chlorosulfonic acid, the addition time is 2 hours, After the addition, heat and stir for 10 minutes, add 150 kg of olive T raw powder, heat to 150 ° C, and keep warm for 3 hours to obtain reduced olive MW dye;

[0032] b. Add the above-mentioned reduced olive MW dye into an enamel kettle containing acidified bottom water consisting of 150L of 31% hydrochloric acid, 25L of 98% sulfuric acid and 3000L of water, beat for 3 hours, heat t

[0035] Preparation of low heavy metal reduced olive MW dyes

[0036] a. Preparation of reduced olive MW: the chlorination pot uses jacketed hot oil to bake the pot to ensure that there is no moisture in the pot; add 1650kg aluminum trichloride and 375kg sodium chloride into the chlorination pot, stir evenly, and heat up to 160°C , heat preservation for 4 hours, after the heat preservation is over, close the hot oil circulation system, open the cold oil system to cool down the chlorination pot, cool down to 110°C, close the cold oil system, slowly add 60L chlorosulfonic acid, the addition time is 2.5 hours, add After that, heat and stir for 10 minutes, add 150kg of olive T raw powder, heat to 160°C, and keep warm for 3 hours to obtain reduced olive MW dye;

[0037] b. Add the above-mentioned reduced olive MW dye into an enamel kettle containing acidified bottom water consisting of 165L of 38% hydrochloric acid, 55L of 98% sulfuric acid and 3000L of water, beat for 3 hours, heat to

[0040] Preparation of low heavy metal reduced olive MW dyes

[0041] a. Preparation of reduced olive MW: use jacketed hot oil to bake the chlorination pot to ensure that there is no water in the pot; add 1800kg aluminum trichloride and 600kg sodium chloride into the chlorination pot, stir evenly, and heat up to 165°C , heat preservation for 4 hours, after the heat preservation is over, close the hot oil circulation system, open the cold oil system to cool down the chlorination pot, cool down to 110°C, close the cold oil system, slowly add 75L chlorosulfonic acid, the addition time is 2.5 hours, add After that, heat and stir for 10 minutes, add 150 kg of olive T raw powder, heat to 170 ° C, and keep warm for 3 hours to obtain reduced olive MW dye;

[0042] b. Add the above-mentioned reduced olive MW dye into an enamel kettle containing acidified bottom water consisting of 200L of 38% hydrochloric acid, 80L of 98% sulfuric acid and 3000L of water, beat for 3 hours, heat to 80°C, an