Bibliographic record
Abstract
Terephthalic acid can be obtained in the presence of a catalyst CdCO3 by isomerization of potassium salt of coal acid (watersoluble acids, WSA) produced from coal oxidation Effects of the amount of catalyst, initial pressure of CO2, reaction temperature and reaction time were investigated It was confirmed that WSA can be converted to terephthalic acid in the presence of a catalyst In case of isomerizing the potassium salt of coal acids alone, the optimum conditions of isomerization were found to be: temperature 430?℃～450?℃, initial pressure of CO2 40?MPa, catalyst CdCO3 4% and reaction time 2?h Such optimum conditions were similar to those of the isomerization by a mixture of potassium coal acids (WSA) and potassium benzoic acid (BA) The yield of crude TPA by isomerization of potassium salt of coal acid was about 34%, which was equivalent to 75% of BPCA(theoretical yield), and was the effective composition of WSA It has shown that the selectivity was good The yield of crude TPA was about 68% if isomerization was carried out wita mixture of potassium salts of coal acid and benzoic acid at its optimum conditions The yield of TPA was as high as 70% after being deducted from the theoretical yield of BA dismutation, and about two times of WSA isomerization alone The purity of the refined TPA was ≥ 99%
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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 | 0.000 | 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) | 0.005 | 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".