SYNTHESIS OF CALCIUM CHLORIDE FROM TECHNICAL LIME

Abstract

Introduction. Calcium chloride is a popular product for oil/oil, gas, chemical, chemical-pharmaceutical, forest, construction and other industries. The aim of this work is to synthesize calcium chloride from low-quality limestone, to calculate the material balance of the process of its production and to study the possibility of using CaCI₂ in the oil industry.  Methodology: Infrared spectra were filmed on an infrared spectrophotometer in the spectral region 225-4000 cm^-1. The basic hydrochloric acid method is selected for producing calcium chloride from technical lime. The synthesis and purification of the CaCI₂ solution were carried out according to a known method. Results and discussion. Experiments have shown that calcium chloride enhances the anti-corrosion properties of a seawater well-killing fluid. The highest degree of protection (89.83%) was observed at 35% CaCI₂ concentration due to chemical composition.  Introducing CaCI₂ into wastewater increases its mineralization and overall hardness, resulting in the formation of a more aggressive environment and an increased corrosion rate. Conclusions: A feasibility study of the process of obtaining pure calcium chloride from technical raw materials was carried out, the material balance of this process was calculated, and it was shown that the cost of the resulting CaCl₂ does not exceed the cost of 1 ton of pure CaCl₂ on the market of services.