Other applications of calcium chloride for calcium chloride desiccant
Nov 20, 2018

Calcium chloride is a colorless cubic crystal. Generally, it is a white or white porous block or granular or honeycomb. Odorless and bitter. The relative density is 2.152, the melting point is 782 ° C, and the boiling point is 1600 ° C or higher. It is extremely hygroscopic, easily deliquescent in exposed air, soluble in water, and emits a lot of heat, and its aqueous solution is alkaline. Soluble in alcohol, acetone, acetic acid. Interaction with ammonia or ethanol produces CaCl2·8NH3 and CaCl2·4C2H5OH complexes, respectively. The hexahydrate is usually precipitated from an aqueous solution at normal temperature. When gradually heated to 30 ° C, it is dissolved in its own crystal water, and the heating is gradually dehydrated. When it is heated to 200 ° C, it becomes dihydrate, and when heated to 260 ° C, it becomes white porous anhydrous calcium chloride.


As an important chemical product, calcium chloride has been widely used in industry, food processing and medicine. According to the content of crystal water contained in calcium chloride, it is divided into calcium chloride dihydrate and anhydrous calcium chloride. The main products are powder, flake and granular. Divided into grades: industrial grade calcium chloride and food grade calcium chloride.


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1. Industrial grade calcium chloride application:

Industrial grade calcium chloride has the characteristics of heating with water and low freezing point, and is usually used for snow melting and deicing of roads, highways, parking lots, docks. It also has the function of strong water absorption. It can also be used as a calcium chloride desiccant, such as drying for nitrogen, oxygen, hydrogen, hydrogen chloride, sulfur dioxide and other gases. It is the best material for dust removal and fabric fire prevention in the port. The aqueous calcium chloride solution is an important refrigeration medium for refrigerators and ice making. A dehydrating agent for the production of alcohols, esters, ethers and acrylic resins. It is also an excellent building antifreeze for accelerating the hardening of concrete and increasing the cold resistance of building mortar. Used as a protective agent and refining agent for aluminum-magnesium metallurgy. Adding calcium chloride additive to the calcined cement can reduce the calcination temperature of the cement clinker by about 40 °C and improve the production capacity of the kiln. It is a precipitant for the production of lake pigments. Used for waste paper processing and deinking. It is a raw material for the production of calcium salts. Calcium chloride solution is used as a flocculant in the sodium alginate industry and the soy product industry.


2. Food grade calcium chloride application:

Food grade calcium chloride is mainly used as a stabilizer, thickener, moisture absorbent, and mouth feel improver for food processing. For example, it is used in the manufacture of foods such as artificial shark's fin, sugar, flower ice cream and preserved fruit; food tenderization of rabbit meat and beef; production of mulberry fruit and orange fruit drink, combined with sucrose ester for food preservation such as banana. In addition, it is also used for the improvement of wheat flour composite protein and calcium fortifier in food. In medicine, calcium chloride is mainly used for drug synthesis. For example, calcium chloride is used as a raw material for the production of calcium L-aspartate; it is used in combination with sodium bromide for the treatment of measles; injection for treatment of internal hemorrhoids.


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