Special iron oxide yellow pigment for tobacco and production method thereof
A technology of iron oxide yellow and its production method, which is applied in the fields of tobacco, tobacco treatment, application, etc., can solve the problems of consumption of non-renewable resources of iron, unsatisfactory product performance, and effective control of content, etc., and achieve good color covering power, particle The degree of fineness and the effect of improving the degree of automatic production
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Embodiment 1
[0019] Embodiment 1, as shown in Figure 1, the iron oxide yellow pigment in this example is formed by dissolving solid ferrous sulfate with a content of 80-88% in water, and reacting with a sodium hydroxide solution with a concentration of 32% after clarification.
[0020] The production method of the iron oxide yellow pigment comprises seed crystal preparation and two-step oxidation, and the process steps are as follows:
[0021] i) seed crystal preparation,
[0022] a) adding water to dissolve and clarify the solid ferrous sulfate with a content of 81.6%, and claiming that 1894kg of ferrous sulfate solution with a content of about 39.6% (100% equivalent content is 750kg) is dropped into the seed crystal reaction tank;
[0023] b) 210kg of sodium hydroxide solution with a concentration of 32% is added to the seed crystal reaction barrel;
[0024] c) At normal temperature, make ferrous sulfate and sodium hydroxide carry out neutralization reaction, pass into air oxidation, ox...
Embodiment 2
[0029] Embodiment 2, as shown in Figure 1, the iron oxide yellow pigment of this example is formed by adding water to dissolve solid ferrous sulfate with a content of 88%, and reacting with a sodium hydroxide solution with a concentration of 32% after clarification.
[0030] The production method of the iron oxide yellow pigment comprises seed crystal preparation and two-step oxidation, and the process steps are as follows:
[0031] i) seed crystal preparation,
[0032] a) adding water to dissolve and clarify the solid ferrous sulfate with a content of 87.6%, and claiming that 2440kg of ferrous sulfate solution with a content of about 41.0% (1000kg for a content of 100%) is dropped into the seed crystal reaction tank;
[0033] b) 280 kg of sodium hydroxide solution with a concentration of 32% is added in the seed crystal reaction barrel;
[0034] c) At normal temperature, make ferrous sulfate and sodium hydroxide carry out neutralization reaction, pass into air oxidation, oxi...
Embodiment 3
[0039] Embodiment three, as shown in Figure 1, the iron oxide yellow pigment of this example is formed by adding water to dissolve solid ferrous sulfate with a content of 86%, and reacting with a sodium hydroxide solution with a concentration of 32% after clarification.
[0040] The production method of the iron oxide yellow pigment comprises seed crystal preparation and two-step oxidation, and the process steps are as follows:
[0041] i) seed crystal preparation,
[0042]a) adding water to dissolve and clarify the solid ferrous sulfate with a content of 86.3%, and claiming that 2200 kg of a ferrous sulfate solution with a content of about 38.6% (converted to a content of 100% is 850 kg) is dropped into a seed crystal reaction tank;
[0043] b) 240kg of sodium hydroxide solution with a concentration of 32% is dropped into the seed crystal reaction tank;
[0044] c) at normal temperature, make ferrous sulfate and sodium hydroxide carry out neutralization reaction, pass into a...
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