CALCIUM CARBIDE Russian patent published in 2013 - IPC C01B31/32 C22B5/10 C22B9/22 

FIELD: chemistry.

SUBSTANCE: method includes thermal processing of crushed limestone and coal with discharge of gaseous products, which are applied for production of carbonic acid. Thermal processing is carried out in one reactor. At the first stage in the process of introduction of raw material into reactor it is subjected to heating to 1000°-1200°C by transmission of heat from constructive elements of loading canal and by exposure of raw material to plasma beam in zone of free movement of raw material particles. Thermal processing of raw material is realised in atmosphere of carbon dioxide. Further synthesis of calcium carbide is realised at temperature, at least, 1700-1800°C by induction heating of reaction mass. Obtained calcium carbide liquid is discharged. Gaseous products, from which carbon oxide and carbon dioxide are separated, are discharged from upper part of reactor, and at least, part of discharged carbon dioxide is applied for filling loading canal. For production of carbonic acid volume of carbon dioxide, remaining after filling loading canal and entire volume of carbon oxide are applied.

EFFECT: increase of target product output and reduction of process power consumption.

1 dwg