Calcium chloride

Calcium chloride is a chemical composed of chloride and calcium elements. The chemical formula is CACL2, which is slightly bitter. It is a typical ion -type halide, with white, hard pieces or particles at room temperature.

Calcium chloride can be divided into industrial -grade calcium chloride and food -grade calcium chloride according to the use. According to the different content and shape, it can be divided into water -free calcium chloride powder, aquatic calcium chloride, and calcium -free calcium chloride tablets Slocked, two -water chloride tablets, two -water chloride, calcium chloride, calcium chloride particles, liquid calcium, different shapes and shapes can meet customer requirements.

Calcium chloride preparation method:

1. Calcium chloride (dehydration method) method:

Calcium chloride consumption of calcium water chloride is dried and dehydrated at 200 ~ 300 ° C to make the finished calcium -free calcium chloride.

Its chemical reaction equation: CACL2 · 2H2O- [260 ℃] → cacl2+2H2O

For a neutral calcium chloride solution, spray drying tower can be used, spray dry and dehydrated under the heat at 300 ° C, and the calcium chloride powder -like finished product is made.

2. Spray drying and dehydration method: Spray the refined and neutral calcium chloride solution of arsenic and heavy metals, spray it from the top of the spray drying tower through the spray drying tower through the nozzle. Calcium chloride, which is made of calcium -free calcium chloride finished products.

3. Mother liquid method:

The mother liquid when the soda is made of amino -alkali, and the aquatic solution is obtained with lime milk milk, which is evaporated, concentrated, cooling, and solidified.

4. Reproduction method:

It is obtained from calcium carbonate (limestone) and hydrochloric acid.

Chemical reaction equation: CACO3+2HCl = CACL2+H2O+CO2 ↑.

After the above steps are completed, heated to 260 degrees Celsius and evaporate dehydration.

5. Refining method:

A by -products in sodium chloride are refined.

Sorvifer's by -products for sodium carbonate are refined. (CA (OH) 2 + 2 NH4CL → CACL2 + 2 NH3 + 2 H2O)

Calcium chloride use:

1. Road anti -freezing, maintenance and dust control: Calcium chloride is the best road melting agent, antifreeze and dustproofing agent, and at the same time, it has a good maintenance effect on the road and roadbed. Every year in Europe and the United States, a large amount of calcium chloride is used in this area.

2. Petroleum drilling: The density of calcium chloride solution is large, which contains a large amount of calcium ions. Therefore, as a drilling additive, it can be lubricated and conducive to removing the drilling mud. In addition, calcium chloride can be mixed with other substances as a well -sealing fluid in oil mining. These mixtures have formed a plug at the well entrance and can work for a long time.

3. Industrial field: Calcium chloride is widely used as a desiccant in the industrial field, which can dry nitrogen, hydrogen hydrogen, sulfur dioxide and other industrial gases; it can also be used as dehydrated agent of alcohol, ester, squinting and acrylic resin. Calcium chloride water solution is an important refrigerant for freezing and ice making.

4. Mining industry: Calcium chloride is mainly used to produce a surface active solution, sprayed on the tunnels and ore, controlling the amount of dust, which can reduce the risk of mining operations. In addition, the calcium chloride solution can be sprayed on the open -air coal seam to prevent the coal seam from freezing.

5. Food industry: Calcium chloride can be added as additives to drink water or beverages to increase mineral content and make flavoring agents. It can also be used as a refrigerant and fresh -keeping agent for food -frozen frozen frozen.

6. Agriculture: Spray wheat with a certain concentration of calcium chloride solution, spray fruits for long -term storage, and calcium chloride can also be used as livestock feed additives.