Preparation of high quality Microgranulate CrO<sub>3</sub> based on green process design
Why this work is in the frame
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Bibliographic record
Abstract
Abstract A mild crystallization process was proposed to prepare chromium trioxide (CrO 3 ) by reaction between K 2 Cr 2 O 7 and HNO 3 aqueous solutions. Through ICP, XRPD, SEM, and EDS analysis, key factors and mechanisms that influenced the preparation of CrO 3 were studied. Large spherical particles of CrO 3 (d 50 ≥ 300 µm) with high purity (CrO 3 ≥ 0.99 g/g, K ≤ 2 mg/g) were prepared when the initial concentration of K 2 Cr 2 O 7 was kept at 80 g/100 mL HNO 3 , the acid feeding rate and the cooling rate were set at 1 mL · min −1 and 0.1 °C · min −1 , respectively, and the direct recovery of Cr 6+ was up to more than 95 %. Kinetic analysis indicated that low nucleation rate and high growth rate would favour the increase of CrO 3 particle size in this process. As a high‐valued byproduct, Cr(VI)‐free KNO 3 was further prepared with the designed crystallization steps. Additionally, green characteristics of the process were also discussed.
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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 | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| 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 it