Loading...

The Effect of Process Variables on Boric Acid Production

Homaee, Sahra | 2020

361 Viewed
  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 53759 (07)
  4. University: Sharif University of Technology
  5. Department: Materials Science and Engineering
  6. Advisor(s): Halali, Mohammad; Askari, Masoud
  7. Abstract:
  8. In the present project, in order to be self-sufficient and optimal use of boron mines in Iran, a study entitled “The effect of process variables on the production of boric acid” has been conducted, This project has two main objectives: the first objective is the production of boric acid from boron sources and mines in Iran and the second objective is to analyze the effect of variables such as temperature, time, acid concentration, solid to liquid ratio and particle size on the purity of boric acid produced. And finally achieve the optimal conditions for the production of boric acid.In this study, boric acid was made from leaching hydrobracite (magnesium-calcium ore with boron) with sulfuric acid.The effect of variables on the purity of boric acid produced and also its optimization was done in Design Expert software with response surface method (RSM) and central composite design (CCD).To evaluate the purity of boric acid, two methods of titration and ICP have been used. By comparing the results obtained, the use of both methods is reliable.In this study, the best purity of boric acid produced was 96.88% and according to the obtained results, in order to achieve the purity of boric acid close to 100%, it is predicted that the mentioned factors should have the following values: Sulfuric acid concentration 2.2 M, temperature 55 ° C, duration 180 minutes, solid to liquid ratio 0.065 g / ml, particle size 400 μm
  9. Keywords:
  10. Boric Acid ; Optimization ; Boron Minerals ; Hydrobracite ; Variables Effect ; Response Surface Methodology

 Digital Object List

 Bookmark

...see more