Microwave Assisted Synthesis of 5-Hydroxymethylfurfural from Starch in AlCl<sub>3</sub>·6H<sub>2</sub>O/DMSO/[BMIM]Cl System
Bibliographic record
Abstract
A successful protocol has been developed for the microwave assisted conversion of corn starch into 5-hydroxymethylfurfural (HMF) utilizing aluminum chloride hexahydrate (AlCl 3 ·6H 2 O) and 1-butyl-3-methylimidazolium chloride ([BMIM]Cl) ionic liquid. HMF yield as high as 59.8 wt % was achieved at 150 °C within a short reaction time of 20 min. The dimethyl sulfoxide (DMSO)/[BMIM]Cl system was found to be tolerant to optimal water content which influenced the product distribution. Levulinic acid was detected in negligible quantities, and humin content could be controlled by varying different process parameters. Satisfactory results were achieved when waxy corn starch (HMF yield 64.9 wt %) and high amylose corn starch (HMF yield 51.1 wt %) were compared as potential feedstock alternatives to fructose and glucose. The work provided significant insight into the synthesis of HMF in a microwave environment from sustainably sourced biomass such as starch having high amylopectin content.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| 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) | 0.001 | 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 source (direct Gemma or distilled Codex), 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".