Sadegh Yousefi

14 Questions 22 Answers 0 Followers

Questions related from Sadegh Yousefi

Simultaneous dissolution of NaCl and KCl in water?

Hi all, Is the rate of dissolution of salts in water directly related to their solubility? The solubility of NaCl and KCl in 300C are 36 and 34, respectively. If 1 liter of water is added to 1 kg...

05 August 2020 9,759 4 View

PHREEQC based simulation for precipitation of salts in Ca-Mg-Na-K/Cl-H2O system during evaporation?

I want to predict the salt precipitation in Ca-Mg-Na-K/Cl-H2O system. In fact, I have a carnallite sample (containing 20 g CaCl2, 270 g NaCl, 180 g KCl and 140 g NaCl) and after complete...

10 January 2019 1,275 1 View

How much of salts are dissolve in water (T= 30°C) during partial dissolution of Carnallite (containing NaCl, KCl, MgCl2 and CaCl2) ?

Hi, I have mixed 0.5 L of H2O (T= 30°C) with 1 kg of Carnallite (containing 140 g NaCl, 180 g KCl, 270 g MgCl2 and 20 g CaCl2). Since that solubility of NaCl, KCl, MgCl2 and CaCl2 at 30°C are...

05 January 2019 4,013 3 View

Crystallite size measurement by Scherer formula?

Hi all, I calculated crystallite size for Mg(OH)2 sample from results of XRD. I used the strongest peak ( (101) ) to calculate FWHM. check other peaks to calculate the crystallite size and then...

27 July 2016 7,895 3 View

Effect of particles size on thermal behaviuor of nanoparticles?

Hi I'm going to put a nanomaterial (Mg(OH)2) with two types of particle size (different particle sizes) which have been synthesized under the same conditions under thermal analysis (DTA-TGA). Are...

10 July 2016 8,126 5 View

Preparation magnesium hydroxide / oxide samples for UV-Vis analysis?

Hi all, I'm going to analysis Mg(OH)2 and MgO by UV-Vis spectroscopy. For this purpose, which solvents are suitable for preparation of samples? Thank you S. Yousefi

05 June 2016 208 4 View

Effect poly ethylene glycol(PEG 4000) on pH increasing?

Hi all, I used PEG 4000 as surfactant in Mg(OH)2 synthesis process. Unlike normal when I used PEG pH range increased. Is PEG effect on increasing of pH due having -OH group? (s. yousefi)

18 May 2016 3,020 1 View

What method can remove impurities limestone after calcination and increase its purity?

After calcination of limestone, lime contains impurities always. Is there a way to remove this impurities?

13 April 2016 724 4 View

How prepared lime milk with good quality as a precipitating agent?

I'm going to use lime milk to precipitatie magnesium from brine. Which is the best of lime / water ratio to produce lime milk. What are the most influential parameters for its preparation?

13 April 2016 4,824 4 View

Is there any suitable method for separation of MgCl2 from CaCl2 in a electrolyte solution?

Hi all, I'm going to separate MgCl2 from a electrolyte solution containing MgCl2 (182 g/L), CaCl2 (458 g/l), NaCl (4 g/L), KCl (4g/L). Given that both concentration of MgCl2 and CaCl2 is very...

12 April 2016 9,795 13 View

How can I simulate precipitation of sulphate, carbonate and calcium ions with CaCl2, HCl and H2SO4 in a solution by PHREEQC program , respectively?

I want remove sulphate, carbonate and calcium ions with CaCl2, HCl and H2SO4 in a solution containing Ca2+, Mg2+, Na+, K+, CO3 2-, SO4 2- and Cl- ions, respectively. How I can find out required...

02 January 2016 8,061 4 View

How do I use PHREEQC to simulate the parting process of various salts from a brine sample by evaporation and cooling (fractional crystallization)?

Hi all, I'm going to separate and recover various salts from brine. The method to achieve this goal is using from fractional crystallization. My main goal is recovery of magnesium chloride. How do...

15 October 2015 796 10 View

Relation between mass of salts and density of solution?

If 20 g CaCl2 and 270 g MgCl2 are dissolved in 1 liter H2O (density=1), what is the density? Your opinion about the following calculations? p=m/V m= m (H2O)+ m(Cal2+MgCl2)=1290...

01 January 1970 8,971 6 View

Cooperation in Research

Hi all, I am ready to collaborate in writing book chapters in extractive metallurgy, nanomaterials, synthesis of nanomaterials as well as research and writing scientific articles. please contact...

01 January 1970 6,485 1 View