A Method for the Production of Barium Hydroxide from Barytes

Author: Sheffield, Harold Clough

Year: 1925

Degree: Bachelor's thesis

Advisor: Lacey, William Noble

Committee Member: Unknown, Unknown

Option: Chemical Engineering

DOI: 10.7907/tdct-qz72

Abstract

The inertness of barytes has led to many experiments and patents for its reduction. It was decided to effect the reduction of the barytes in a cement kiln with carbon. The temperature of the greatest yield with the least water insoluble material is between 1000°C and 1100°C and with a minimum period of heating. The yield is about 87% of the original barytes. The resulting BaS is quenched with water and ground to 20 mesh. The leaching is very quickly accomplished and the temperature of the solution is raised 80°C to bring more material into solution. The solution is then filtered, a theoretical amount of CuO added and the mixture boiled. The resulting CuS is filtered off and CuO regenerated by roasting. The Ba(OH)2 solution is evaporated down and the solid precipitated out by cooling. The material is in the form of Ba(OH)28H2O, and must be heated to a dark red heat to drive off all the water of crystallization.

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