Solubility of AlCl<sub>3</sub>·6H<sub>2</sub>O in the Fe(II) + Mg + Ca + K + Cl + H<sub>2</sub>O System and Its Salting-Out Crystallization with FeCl<sub>2</sub>
Bibliographic record
Abstract
Phase equilibria determination for the Al + Fe(II) + Mg + Ca + K + Cl + H 2 O system showed that FeCl 2 is effective to promote the salting-out crystallization of AlCl 3 ·6H 2 O. A novel process to recover AlCl 3 ·6H 2 O from fly ash by salting-out crystallization with FeCl 2 is proposed and proven feasible. This novel process includes leaching of fly ash by hydrochloric acid, reduction of Fe 3+ to Fe 2+, salting-out crystallization of AlCl 3 ·6H 2 O with FeCl 2, and filtering followed by washing. The solubility of AlCl 3 ·6H 2 O in the Fe(II) + Mg + Ca + K + Cl + H 2 O system was determined over the entire practical concentration range and from 283.2 to 363.2 K using a dynamic method. The experimental solubilities were regressed to obtain new mixed solvent electrolyte (MSE) model parameters. These new parameters were capable of accurately representing the experimental data of the system from 283.2 to 343.2 K. The phase diagram of the ternary AlCl 3 –FeCl 2 –H 2 O system at 298.2 and 333.2 K was successfully constructed with the aid of the new MSE model parameters. Based on the phase diagram, a promising route to recover AlCl 3 ·6H 2 O by salting-out crystallization with FeCl 2 was generated and verified to be feasible in laboratory experiments. All the results generated from this study will provide fundamental data for industrial applications aiming at the recovery of alumina from fly ash resources.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.004 | 0.002 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.002 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.002 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".