Evaporative crystallization process for calcium formate production

Abstract

The invention provides an evaporative crystallization process for calcium formate production, and relates to the technical field of calcium formate production, and the evaporative crystallization process comprises the following steps: coal gas treatment, coal gas compression, calcium oxide weighing, tubular reaction, impurity removal, evaporative crystallization, centrifugal drying and cooling packaging. According to the method, the step of removing impurities is carried out after liquid synthesis and before evaporative crystallization, calcium carbonate in the synthesis liquid is firstly removed through heating, the calcium carbonate is decomposed into calcium oxide and carbon dioxide, the calcium oxide is left in the synthesis liquid to continue to participate in the reaction, the carbon dioxide escapes, and then the heavy metal capture microspheres are prepared. Impurities such as heavy metal, arsenic and calcium carbonate are captured and removed in the purification process, so that the product quality is ensured, and the produced calcium formate product is proved to have the content of 99% or above, the purity is high, and the color is pure white.

Description

technical field [0001] The invention relates to the technical field of calcium formate production, in particular to an evaporation crystallization process for calcium formate production. Background technique [0002] Calcium formate is an organic substance with the molecular formula C 2 H 2 O 4 Ca, used as a feed additive, is suitable for all kinds of animals, and has the functions of acidification, mildew resistance, antibacterial, etc. It is also used in industry as an additive for concrete, mortar, leather tanning or as a preservative. The amount of calcium formate varies with temperature. It will gradually increase as it decreases, even if it is applied at 0.3-0.5% in summer, it will have an obvious early-strength effect; [0003] The methods for industrial production of calcium formate are mainly the calcium carbonate method and the calcium hydroxide method, wherein, in the preparation of the above-mentioned methods, there is a lack of purification steps for the synt...

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Problems solved by technology

[0003] The methods for industrialized production of calcium formate are mainly calcium carbonate method and calcium hydroxide method, wherein, in the preparation of the above methods, there is a lack of purification steps for the synthetic liquid, and impurities such as heavy metals, arsenic, and calcium carbonate are likely to remain in the raw materials, and it is difficult to guarantee the quality of the product. quality, therefore, the present invention proposes a kind of evaporative crystallization process for the production of calcium formate to solve the problems existing in the prior art

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