Preparation method of calcium propionate and second-effect flash distillation plant
A technology of flash evaporation device and calcium propionate, which is applied in the field of preparation of calcium propionate in a second-effect flash device, can solve the problems of high energy consumption and low efficiency, and achieve prolonging the cleaning cycle, reducing consumption, and reducing the cost of waste. The effect of the chance of dirt
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Embodiment 1
[0038] Example 1. refer to figure 1 . A preparation method of calcium propionate, the steps are as follows:
[0039] (1) Preparation of milk of lime: after putting CaO≥95% quicklime powder with a particle size of 100-400 mesh into the digester, add an appropriate amount of H 2 O reacts to produce milk of lime; the milk of lime discharged from the digester is then sent to the slaking tank to produce Ca(OH) 2 The mass percent concentration is 8% milk of lime;
[0040] (2) reaction: milk of lime is dropped into reactor, in reactor, add the propionic acid that mass concentration is not less than 99.5% and carry out neutralization reaction, propionic acid is added in 20 minutes, and the weight ratio of propionic acid and milk of lime is 1:2, the stirring speed of the reactor is 600 rpm, the reaction temperature is 70°C, the pH of the neutralized material is 7, and the reaction is 1 hour;
[0041] (3) Filtration: after the reaction is completed, the reaction material is put int...
Embodiment 2
[0044] Example 2. refer to figure 1 . A preparation method of calcium propionate, the steps are as follows:
[0045] (1) Preparation of milk of lime: after putting CaO≥95% quicklime powder with a particle size of 100-400 mesh into the digester, add an appropriate amount of H 2 O reacts to produce milk of lime; the milk of lime discharged from the digester is then sent to the slaking tank to produce Ca(OH) 2 The mass percent concentration is 10% milk of lime;
[0046] (2) reaction: milk of lime is dropped into reactor, in reactor, add the propionic acid that mass concentration is not less than 99.5% and carry out neutralization reaction, propionic acid is added in 40 minutes, and the weight ratio of propionic acid and milk of lime is 1:3, the stirring speed of the reactor is 800 rpm, the reaction temperature is 90°C, the pH of the neutralized material is 8, and the reaction is 3 hours;
[0047] (3) Filtration: after the reaction is completed, the reaction material is put i...
Embodiment 3
[0050] Example 3. refer to figure 1 . A preparation method of calcium propionate, the steps are as follows:
[0051] (1) Preparation of milk of lime: after putting CaO≥95% quicklime powder with a particle size of 100-400 mesh into the digester, add an appropriate amount of H 2 O reacts to produce milk of lime; the milk of lime discharged from the digester is then sent to the slaking tank to produce Ca(OH) 2 The mass percent concentration is 9% milk of lime;
[0052] (2) Reaction: milk of lime is dropped into reactor, in reactor, add the propionic acid that mass concentration is not less than 99.5% and carry out neutralization reaction, propionic acid is added in 30 minutes, and the weight ratio of propionic acid and milk of lime is 1:2.5, the stirring speed of the reactor is 700 rpm, the reaction temperature is 80°C, the pH of the neutralized material is 7.5, and the reaction is 2 hours;
[0053] (3) Filtration: after the reaction is completed, the reaction material is pu...
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