염화칼슘

Calcium chloride, CaC12, is colorless deliquescent solid that is soluble in water and ethanol. It is formed from the reaction of calcium carbonate and hydrochloric acid or calcium hydroxide and ammonium chloride. It is used in medicine, as an antifreeze, and as a coagulant.

개요무수물(無水物, anhydride. 분자 중에서 산소와 수소가 물의 비율대로 떨어져 나간 무기 화합물)은 습기를 흡수하는 성질이 있다. 그리고 조해성(습기를 흡수한 후 스스로 녹는 성질)이 있다. 따라서 무수물은 건조한 환경에서 밀봉하여 보관해야 한다. 물과 알코올, 아세톤에 잘 녹는다. 전기 분해하면 칼슘과 염소로 나뉜다.

용도무수염 및 2수 화염은 각종 물질의 건조제로 사용 되며 수용액은 냉동기용 및 얼음 제조용의 냉매로 쓰인다. 또 콘크리트에 혼합하여 동결 방지에 사용되며 집진제, 목재, 직물의 방화제,식품, 목제의 방부제등에 사용 된다

출처Calcium chloride may be found in nature as the mineral tachhydrite, CaCl22MgCl212H2O. It also is found in other minerals. Its concentration in sea water is about 0.15%.Calcium chloride has several industrial applications. The major applications of this compound are in deicing of roads, dust control, imparting stability to roads and buildings, and to improve traction in tractor tires. It is mixed with ice to make freezing mixtures. Hexahydrate mixed with crushed ice can lower the temperature of the cooling bath to below -50°C. It also is used as a desiccant for dehydrating gases and liquids. It is added to cement in various proportions to manufacture different types of concrete. Other uses are in adhesives, to lower gel temperatures, and as a calcium source in liquid feed supplements for dairy cattle. Also, the compound is used to control particle size development and reduce coalescence in plastics.

용도Calcium chloride is highly hygroscopic and is often used as a desiccant.

일반 설명Calcium Chloride (CaCl2) is a water soluble ionic crystal with a high enthalpy change of solution. It is majorly derived from limestone and is a by-product of the Solvay process. It is an anhydrous salt that has a hygroscopic nature and can be used as a desiccant.

생산 방법Calcium chloride is a principal byproduct from the Solvay process.

Calcium chloride is obtained as a by-product in the manufacture of sodium carbonate (soda ash) by ammonia-soda (Solvay) process. The process involves the reaction of sodium chloride with calcium carbonate and ammonia. Calcium chloride is currently produced in bulk amounts by evaporation of natural underground brines. In the laboratory, calcium chloride can be prepared by treating limestone with hydrochloric acid followed by evaporation of solution to obtain crystals. The crystals are dehydrated to obtain anhydrous salt. Calcium oxide or hydroxide may be used instead of carbonate.