Table 3: Formulation to determine the ratio NaHS 43% / NaOH 50%.
| Reagents |
Test 1 |
Test 2 |
Test 3 |
| NaHS, 43% |
4341 g |
3964 g |
3585 g |
| [NaHS] |
43.40% |
43.40% |
43.40% |
| [Na2S] |
0.33% |
0.33% |
0.33% |
| [Na2CO3] |
<0.1% |
<0.1% |
<0.1% |
| H2O |
60 g |
121 g |
181 g |
| Reagents |
|
|
|
| NaOH 50% |
319 g |
538 g |
957 g |
| H2S ( 0.4 vvmin) |
137 g |
275 g |
412 g |
| NaHS, 43%/ NaOH, 50% |
13.6 |
6.21 |
3.74 |
| Mass balance |
|
|
|
| [Na2S], % |
6.89 |
13.46 |
20.02 |
| [NaHS], % |
35.14 |
26.95 |
18.74 |
| [H2O], % |
57.9 |
59.59 |
53.84 |
| Crystals weight |
512 g (10.8%) |
1047 g (22.16%) |
1586 g (33.5%) |
| Liquid weight |
4208 g |
3676 g |
3137 g |
| Total weight |
4720g |
4723 g |
4723 g |
| Solid phase volume |
1052 mL (29%) |
1473 mL (41%) |
2526 mL (70%) |
| Liquid phase volume |
2525 mL |
2105 mL |
1053 mL |
| Total volume |
3577 mL |
3578 mL |
3579 mL |