Production of Lactobionic Acid from its Sodium Salt Solution by Ion-Exchange on a Commercial Strong Acid Resin: Kinetic Data and Modeling
Why this work is in the frame
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Bibliographic record
Abstract
Lactobionic acid (LBA) is a high value added product obtained from lactose oxidation. Since this reaction should be conducted in alkaline media by adequate addition of a Na-, Ca- or K-base, the final product is a lactobionate salt solution instead of the acid form. In this study, the behavior of a strong cation exchange resin (AmberliteTM FPC23 H) for the production of a LBA solution from its sodium lactobionate salt (LBNa), was investigated. The sodium exchange efficiency was evaluated at three different temperatures (5, 25, and 35ºC). The resin exhibited a good performance in the removal of sodium from the LBNa solution. In all cases, sodium concentration in LBA solution was reduced below 5 mg/L. A complete sodium removal was achieved after about 30 min at 5ºC, and after circa 10 min at 25 and 35ºC. Various kinetic models were used for the evaluation of experimental ion-exchange kinetic data. The rate constants, transient capacities, and related correlation coefficients for each kinetic model were calculated and discussed. Results showed that the pseudo-second order and the reversible reaction models adequately describe the experimental kinetic data. The activation energies computed using the rate constants obtained with these models were 50.87 and 36.12 kJ/mol, respectively.
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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 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| 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