Shanghai Liangren Chemical Co.,LTD

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Production and grade requirements for anhydrous calcium chloride
- Mar 18, 2017 -

Anhydrous calcium chloride (CaCl2) is white or off-white solid (granular, massive or powder), slightly bitter, odorless, soluble in water, soluble in water release a lot of heat. Has a strong hygroscopicity, easy to deliquescence in the air, should be sealed storage.
  CaCl2 can be used as antifreeze, coagulant antifreeze, fabric fire retardant, food preservative and so on for desiccant, dehydrating agent, refrigerant, aviation and automobile internal combustion engine.
First, the production principle
  Available limestone and hydrochloric acid reaction in the system. The main chemical reactions are as follows CaCO3 + 2HCl → CaCl2 + H2O + CO2 ↑
Second, the operation process
  1. Calcium chloride dihydrate (CaCl2 · 2H2O): hydrochloric acid (31%) and limestone powder, according to the ratio of 2.2: 1 into the reaction tank, the reaction under stirring to generate acidic calcium chloride solution, Clarify the trough. Add lime milk, adjust the solution pH value of 8.9 ~ 9, then ferric hydroxide, magnesium hydroxide precipitation. After clarification, filtration, the filtrate was transferred to the evaporator and heated to 172-174 DEG C. After crystallization, the mixture was dried and dehydrated at 200 to 240 ° C to obtain calcium chloride dihydrate.
  2. System of anhydrous calcium chloride: calcium chloride dihydrate and then heated to 260 ~ 300 ℃, dry and dehydrated, that is white into the anhydrous calcium chloride.
 Physical and chemical properties:
   Colorless cubic crystals, white or off-white porous or granular solid. Relative density of 2.15, the melting point of 782 ℃, the boiling point of more than 1600 ℃, highly hygroscopic, easily deliquescence, soluble in water, while releasing a lot of heat, odorless, slightly bitter, aqueous solution was slightly acidic, soluble in alcohol, Vinegar, acetic acid.
 Product Usage:
   Is the production of precipitants of lake pigments. Production of nitrogen, acetylene gas, hydrogen chloride, oxygen and other gases desiccant.
Alcohols, ethers, esters and acrylic resins are used as dehydrating agents, and the aqueous solution is an important refrigerant for refrigerators and refrigerants. Can accelerate the hardening of concrete, cement mortar to increase the ability to cold, is an excellent antifreeze. Used as a protective agent for aluminum and magnesium metallurgy, refining agent.
Packaging and storage:
   This product is lined with polyethylene composite plastic woven bags, Chinese and English fonts, two sections, 22kg, 25kg, 30kg, 40kg four kinds of packaging specifications.
   This product should be stored in a ventilated, dry warehouse, loading and unloading when gently, to prevent damage to the packaging and moisture absorption


Shanghai LiangRen chemical co., LTD. Is located in the jiading district of Shanghai, is one of the leading domestic electroplating chemical raw materials manufacturers and distributors, professional production: chromate salt, copper,nickel, cobalt salt and other salt products. the company's products has been exported to Australia, Germany, Korea, Japan, Thailand, United Kingdom, Taiwan, Indonesia, Malaysia and other countries and regions, with customers to establish long-term, stable relations of cooperation.

In 2013 the company passed the ISO9001;2008 quality system, product quality control standard.While strengthen hardware construction, software systematic management, make the company development to a new level.

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