|Opis:||In the company, which deals with the production of glass products, they use the process of chemical polishing of products. Polishing is based on the interaction between two acids, sulfuric (VI) acid and hydrofluoric acid. When a mixture of these acids is used, it needs to be neutralized in order to minimize the negative effects on the environment. For the neutralization process, lime from a particular supplier is used, but they estimate that this lime is not the best choice. Therefore, an idea has emerged to optimize the process by selecting the most effective lime. For this purpose, we have created the Master’s thesis. We carried out a seed analysis, determined the bulk density, and the content of CaO, Ca (OH)2, CaCO3 in the individual lime samples. The kinetic parameters (reaction order, rate constant k, activation energy) were determined for the reaction between (waste) acid and milk of lime, which was prepared from different lime samples. The reaction was carried out at 20 °C, 25 °C and 30 °C. We also determined the time required to achieve the desired pH = 7,5.
We have determined that lime samples differ in their physical and chemical properties, and the differences between them influence the course of the reaction. It turned out that finer granulation leads to a faster reaction, which also has a lower activation energy. Due to that, there is less lime required for the neutralization process. The possible replacement of lime could also reduce annual costs. Sample 3 proved to be the best lime for the intended purposes.|