1. Product description
Calcium chloride is inorganic salt, white crystal, chemical formula: CaCl2, molecular weight: 111, melting point: 772 ℃
It has unique physical properties such as high solubility, strong hygroscopicity and easy hydrolysis in air. When the concentration of calcium chloride solution is 30%, it does not freeze at – 55 ℃, so it can be widely used as desiccant, refrigerator, deicer, coagulant in chemical industry, mining, construction and transportation, medicine, light industry, food, storage, dye and other industries. Qingdao Jiede Chemical Co., Ltd. arranges the following information for your reference.
Calcium chloride products are divided into liquid calcium chloride and solid calcium chloride according to different states. The main specifications of liquid calcium chloride are 28%, 32%, 34%, 40% and other products with different concentrations. The main specifications of solid calcium chloride are 74%, 77%, 94% and other products with different contents. Solid calcium chloride can be prepared into powder, flake, spherical and other forms according to different use environment.
2. Main preparation process
2.1 calcium chloride dihydrate (dehydration) method:
The edible anhydrous calcium chloride was prepared by drying and dehydrating the edible calcium chloride dihydrate at 200-300 ℃.
For neutral calcium chloride solution, spray drying tower can be used for spray drying and dehydration at 300 degree hot air flow to produce anhydrous calcium chloride powder.
2.2, spray drying dehydration method: the refined neutral calcium chloride solution, which has removed arsenic and heavy metals, is sprayed into mist through the nozzle above the spray drying tower and counteracted with the 300 degree hot gas stream to dry and dehydrate, and the powdered anhydrous calcium chloride is obtained to produce the finished product of anhydrous calcium chloride.
2.3 mother liquor method
The aqueous solution is obtained by adding lime milk to the mother liquor of soda ash production from ammonia alkali. It is evaporated, concentrated, cooled and solidified.
2.4. Double decomposition method
It is obtained from the reaction of calcium carbonate (limestone) with hydrochloric acid.
Chemical reaction equation: CaCO3 + 2HCl = CaCl2 + H2O + CO2 ↑.
After the above steps are completed, it is heated to 260 ℃ and evaporated for dehydration.
2.5. Refining method:
The by-product in the production of sodium hypochlorite is refined.
It is refined from the by-product of Solvay process for the preparation of sodium carbonate.
Ca(OH)2 + 2NH4Cl → CaCl2 + 2NH3 + 2H2O
Calcium chloride has a wide range of uses
Manufacturing desiccant in all walks of life. (at present, granular products are widely used as household desiccant)
The refined calcium chloride can be used in food, electronic industry, leather industry, production of propylene resin, and in organic chemical production process as distillation petroleum, ether alcohol mixing agent.
Snow and ice removal for roads, parking lots and airports in winter.
Prevent and remove dust, coal dust and mineral dust.
Oil drilling, drilling fluid, completion fluid and petrochemical dehydrator.
Rubber latex gels.
The ferrous metallurgy industry is used as chlorinating agent and additive.
Additives for paper industry (increase paper strength).
Construction industry, as: concrete additives, paint coagulant.
The freezing point temperature of calcium chloride aqueous solution is far lower than that of water, which is widely used as refrigerant in refrigeration and air conditioning systems.
Chemical industry, inorganic chemical raw materials and sulfate removal agent, coagulant of sodium alginate.
It is used to control wheat, apple, cabbage and other rot diseases and food preservatives.
Its hexahydrate is used as solar energy heat storage material, as fluoride removal agent in refinery wastewater, paper deinking, and is the main carrier of calcium nutrient in agriculture.
Precipitation agent for organic pigment production.
Main raw materials for the production of metallic calcium and sodium.
At the same time, calcium chloride is also needed for the demisting of ports or airports.
According to Dow Chemical Statistics (1999), 21% and 27% of calcium chloride are respectively used for melting ice and snow and preventing solid dust on roads, 20% for oil and gas exploitation industry, 13% for industrial processing, 10% for concrete additives, and the remaining 9% for other purposes.
4. Market Forecast:
It is preliminarily predicted that from this year, the annual increase of calcium chloride consumption in North America will be 3% – 4%; the increase of calcium chloride consumption in Europe will also be 4% – 5%; the growth rate in other regions will be about 2%. The growth rate of flaky calcium chloride in South America is much higher than that of other varieties.
1. Product description