Oct. 28, 2024
Agriculture
What is Calcium Carbide?
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Calcium Carbide is an industrial chemical made up of the elements calcium and carbon. In its pure form, it appears as a colorless solid but its technical grade pieces appear as grey or brown in color. It emits an unpleasant garlic like odor in the presence of moisture. It reacts violently with water. Calcium Carbide is also known as calcium acetylide and its chemical formula is CaC2.
This chemical has many industrial uses but it is most popularly used in the chemical industries.
Calcium Carbide Uses
Calcium Carbide is an extremely useful chemical. It is an industrial chemical that is most commonly used in the chemical industries. Its uses are:
Is Calcium Carbide Safe?
Calcium Carbide is generally considered unsafe because the chemical is toxic. Exposure to this chemical can have acute or chronic health effects. According to the MSDS of Calcium Carbide, it may cause skin irritation, serious eye damage, and respiratory irritation. It is also toxic to aquatic life. Proper storage and disposal of Calcium Carbide needs to be taken into consideration in order to avoid any unwanted effects.
How is Calcium Carbide Made?
Industrially, Calcium Carbide is produced in an electric arc furnace from a mixture of lime and coke at high temperature.
Where to Buy Calcium Carbide in Bulk?
You may be able to find small quantities of Calcium Carbide in your area. However, in order to buy large quantities of Calcium Carbide, it is preferable to import directly from the manufacturers. They can issue certifications and provide cost savings which is better than buying the chemical in small quantities locally or from a distributor.
If you require bulk quantities of this chemical, you can buy Calcium Carbide on our website or contact us for further details.
Which Countries Manufacture Calcium Carbide in Bulk?
The consumption of Calcium Carbide has increased dramatically across the world, especially in the developing countries. Therefore, its huge demand has led to a surge in companies that produce it. The main producers of Calcium Carbide are:
How is Calcium Carbide Exported?
Calcium Carbide is shipped in:
What is the Latest Calcium Carbide Price?
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As Calcium Carbide is a commodity product, the price usually changes depending on the price of raw materials, logistics, and other related industrial inputs such as labor and taxes. In order to get the latest price of Calcium Carbide, please contact us and we will provide a quotation right up to your country.
Where to Buy Calcium Carbide?
Here at Camachem we have Calcium Carbide for sale. We export worldwide, so you can contact us for a FREE quotation via address [ protected] or send a message on for a fast response at +86-131--.
In , while experimenting with a voltaic cell, Humphry Davy produced the first arc light by passing an electric current between two carbon rods, which touched each other, and then drawing them apart. When an electric current meets with resistance, its energy is transformed into heat, and because the carbon vapor in the arc offers high resistance to the electric current, temperatures as high as ° C are attainable, high enough to melt or vaporize any known substance.
The carbon-arc furnace, which dates from when it was battery operated, was of no practical value until after the development in of the electrical dynamo for converting water or steam power into electricity. Not until the work in Spray did the arc furnace become an industrial reality.
Over the half century following its discovery in by Edmund Davy, a cousin of Humphrey Davy, acetylene was only a laboratory curiosity. After Thomas L. Willson's discovery of a cheap commercial process for making acetylene in , massive quantities of the gas were in demand for lighting.
A newly developed acetylene burner, designed to bring adequate air to the flame to eliminate smoke and soot, gave a brilliant white light, 10 to 12 times brighter than that of any commercial fuel then in use. By , acetylene generators and compressed acetylene were successfully competing with the fledgling electric light industry to provide excellent lighting, particularly in country homes and those not accessible to gas utilities.
Portable acetylene generators, which worked simply by dropping water on calcium carbide, provided a practical way for lighting railways, mines, bicycles, and automobiles. Acetylene lighting was used in transportation for a decade or more until electrical generation systems and shock-resistant light bulbs were developed. Miners continued to use carbide lights on their caps until long-lasting, dry-cell electric batteries were perfected in the s.
Acetylene also replaced oil in marine buoys because it provided a far brighter light. The automatic carbide acetylene generators used at first were not very reliable and were replaced by compressed acetylene. Swedish engineer Gustaf DalÉn received the Nobel Prize in physics for his discovery of techniques that allowed safe compression of acetylene. A few of the acetylene buoys were still in operation in the s.
In , Thomas Willson began experiments at Spray with smelting metals in the carbon-arc furnace. After , this work was carried on by Guillaume de Chalmot. The high temperature of the arc furnace provided a more efficient means for alloying iron with chromium, manganese, and other metals.
As a group, these low-iron alloys, called ferro-alloys, can be readily dissolved in steel to impart predictable properties according to the type and amount of metal added. For the first time, steels could be tailor-made for such properties as toughness, impact strength, high strength at high temperatures, and corrosion resistance. Improved armor plate for battle ships, high-speed tool steels, and stainless steels are just three of the hundreds of specialized steel products now in use.
During the 19th century, the only means of continuously joining two pieces of iron or steel was to heat them in a forge and hammer them together. In , electric welding was introduced, but it was of no practical value because the electric power industry was not sufficiently developed to sustain it. Oxyhydrogen and thermite welding were known but had not been perfected.
When burned with oxygen instead of air, acetylene gave a flame temperature of °C compared with °C for the Bunsen burner flame. This high flame temperature was reported in but not exploited until about , when a commercial oxyacetylene welding apparatus was developed in France. The first oxyacetylene welding shop in the United States was set up in , and in the technique was adopted at the Brooklyn Navy Yard. There, oxyacetylene torches could cut a porthole in 3-inch armor plate in 30 minutes, a task that formerly had required five men working for two weeks to complete. The sudden, great demand for oxygen for welding launched oxygen as a commodity product.
Henri Moissan observed in that calcium carbide absorbed atmospheric nitrogen. In , Fritz Rothe of Germany found that the compound formed by this absorption was calcium cyanamide. In the soil, calcium cyanamide decomposes to yield urea and ammonium carbonate, both potent fertilizers. A commercial process patented by Adolf Frank and Nikodem Caro for making calcium cyanamide from carbide was perfected in Germany in and was widely adopted almost immediately. This was the first commercial process that was used worldwide to fix atmospheric nitrogen. World output of calcium cyanamide increased from 1,700 tons in to an estimated peak production of 1.5 million tons in .
Following Willson's synthesis of chloroform and aldehydes from acetylene in , acetylene soon became the starting material in the synthesis of a host of organic substances, particularly for the solvent, plastics, and synthetic rubber and fiber industries. By , work in Germany led to chlorinated solvents by partial or complete chlorination of acetylene, and in to a full-scale plant producing 1,1,2-trichloroethene. These solvents were used extensively after for degreasing metals in preparation for electroplating or painting. By , Germany was producing polyvinyl acetate for use in varnishes. Subsequently, polyvinyl acetate was used in adhesives, paints, paper, textiles, glue, and flooring materials.
During World War I, commercial processes for the production of acetaldehyde, acetic acid, and acetone (by passing acetic acid over a hot catalyst) were installed in Canada; acetone in particular was needed for making explosives. Similar processes in the United States in the s served the cellulose acetate industry for the production of fibers and film. In the same decade, the synthesis of vinyl acetylene by Julius Nieuwland led to the development in of the synthetic rubber, neoprene, by DuPont. Its annual output reached 120,000 tons by .
In Germany after World War I, butadiene made from acetylene was the basis of a rubber substitute that made the country self-sufficient in rubber. Also in Germany, beginning in , J. Walter Reppe pioneered the study of acetylene chemistry at pressures as high as 200 atmospheres. This opened up a vast new field, often known as "Reppe chemistry." Reppe even managed to form cyclooctatetraene by linking four acetylene molecules in a ring, confirming Richard Willstïtter's much contested claim that he had made the same compound in .
With hydrocyanic acid, acetylene forms acrylonitrile, which can then be polymerized and spun into acrylic fibers. World production of acrylic fibers in was 2,523,000 tons.
In the past 40 years or so, acetylene has increasingly been derived from petroleum, but if petroleum reserves dwindle sufficiently to raise the price above that of coal, industry might return to coal, and calcium carbide would again become a main path to organic chemicals.
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