Acetylene manufacture from coal calcium carbide process

2 acetylene MANUFACTURE FROM COAL CALCIUM CARBIDE PROCESS 

In this method, lime (calcium oxide) is reduced by carbon (coke or anthracite) CaO -i- 3C - CaCj + CO = 465 kJ/mol 

The process takes place in an electric furnace between 2200 and 2300 C. The calcium carbide obtained is then hydrolysed to produce acetylene  

Caldum carbide in the molten state is drawn off from one or more (up to 6) tap holes in the base of the furnace. It is collected in crucibles, where it cools for one to two hours and is then emptied for subsequent crushing and screbcing (Fig. 5.2). 

The production of calcium carbide is accompanied by the evolution of a large amount of carbon monoxide (400 This gas contains on the average (per cent volume) CO=70, COj lO, N2=9, H2=7 and CH4 2, together with dust Older installations burned it at the surface of the furnace, but modem units employ it as a furi in auxiliary installations. 

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Acetylene manufacture from coal calcium carbide process. 303... 

Chemical Uses. In Europe, products such as ethylene, acetaldehyde, acetic acid, acetone, butadiene, and isoprene have been manufactured from acetylene at one time. Wartime shortages or raw material restrictions were the basis for the choice of process. Coking coal was readily available in Europe and acetylene was easily accessible via calcium carbide. 

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