Influence of the Crystal Phase of Magnesium Phosphates Catalysts on the Skeletal Isomerization of 3,3-dimethylbut-1-ene
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Bibliographic record
Abstract
The nature of the precipitating agent strongly influences the synthesis of magnesium phosphate. Ortho- and pyro-phosphate can be obtained with the use of NaOH and NH4OH, respectively. Both solids obtained were investigated as synthesized or after calcinations by various physico-chemical techniques such as X-ray diffraction (XRD), diffuse reflectance infrared spectroscopy (DRIFT). The compounds calcined at 773 K have been further characterized by 31 P MAS-NMR spectroscopy. The skeletal isomerisation of 3,3-dimethylbut-1-ene (33DMB1) over MgP and MgPP catalysts is a first order reaction. The catalytic activity increases with the reaction temperature from 493 to 653 K for both solids. It is affected by the crystal phase of magnesium phosphate. The magnesium pyrophosphate (MgPP) catalyst is more active than magnesium orthophosphate (MgP) catalyst in this temperature range.
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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