Patent ID: 6294148
Filing Date: 2001-09-25
Classification: B01J,C01F,C10H

Abstract:
A process for controlling the continuous production of acetylene and hydrated lime from the reaction of water with calcium carbide in which the hydrated lime is produced as a slurry with an essentially constant concentration of the hydrated lime that is independent of the variations in rate at which acetylene is being withdrawn, the process comprising;introducing calcium carbide to a reaction zone at a rate to correspond stoichiometrically with the rate at which acetylene is being withdrawn,continuously adding water to the reaction zone to maintain an excess of water with respect to reaction of calcium carbide with water and to maintain a constant liquid inventory in the reaction zone,withdrawing the acetylene,withdrawing the hydrated lime from a dense region of a settling zone within the reaction zone as a slurry of water and hydrated lime at an essentially constant and controlled mass ratio of the hydrated lime slurry mass withdrawal rate to the calcium carbide mass feed rate.