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Can calcium chloride desiccant be reused?
2019-01-14 16:08:02
341次访问

氯化钙干燥剂

Calcium chloride desiccant drying principles? Calcium chloride as desiccant particles of porous solid blocks. It easily deliquesces in the air, so anhydrous calcium chloride can be used as a desiccant, which belongs to chemical adsorption. Calcium Chloride Desiccant Desiccant The main raw material of calcium chloride desiccant is refined by using high-quality calcium carbonate and hydrochloric acid as raw materials, through reaction synthesis, filtration, evaporation, concentration and drying.


White porous block, granular or honeycomb solid. The taste is bitter and odorless. The aqueous solution is colorless. Calcium chloride desiccant is mainly used as a raw material for the production of various other calcium salts in inorganic chemicals; it is also used as a desiccant for gases to produce dehydrating agents for alcohols, esters, ethers and acrylic resins. Used as a calcium enhancer, curing agent, chelating agent, desiccant, etc. in the food industry. The calcium chloride desiccant desiccant has the effects of adsorption active static dehumidification and odor removal. It not only has fast adsorption speed, high adsorption capacity, and is non-toxic, odorless, non-contact corrosive, and has no environmental pollution, especially for human body. It is widely used in oil seal, optical medical, health food and military products.

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Calcium chloride (CaCl2) is a white powder, granule, flake, or block. Due to its certain characteristics of calcium ions, it can combine with some water to form crystal water CaCl2·nH2O, n=1, 2, 4, 6 Calcium chloride (CaCl2) has a high solubility in water. 100 °g of water can dissolve 59.5 g of calcium chloride at 0 ° C, and 100 g of water can dissolve 159 g of calcium chloride at 100 ° C. It can form hydrates containing 1, 2, 4, and 6 crystal waters, and their temperature ranges are: CaCl2?6H2O is lower than 29 °C; CaCl2?4H2O, 29-45 °C; CaCl2?2H2O, 45-175 °C; CaCl2?H2O, above 200 °C. 


The principle of calcium chloride desiccant hygroscopic gelation is that the calcium chloride desiccant chemically reacts with water to form hydrated calcium chloride, and the hydrated calcium chloride is in a liquid form. However, calcium chloride is used as a desiccant. We need to solidify its liquid to prevent liquid leakage. Therefore, it is necessary to add a thickener such as starch, so that the calcium chloride desiccant can be absorbed into a liquid hydration. The substance solidifies and becomes gelatinous.


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