HuagongsheHuagongshe Chemistry Print Report · For research reference only
2-Methylbenzenesulfonic acid → 4,5-Dichlorophthalic anhydride
Participants
| Role | Name | HCID | Charge |
|---|---|---|---|
| Reactant | 2-Methylbenzenesulfonic acid | HCID 6925 | — |
| Reactant | 4,5-Dichlorophthalic acid | HCID 92600 | — |
| Solvent | O-Xylene | HCID 7237 | — |
| Product | 4,5-Dichlorophthalic anhydride | HCID 70334 | 89.9% |
Reaction Steps
In a flask equipped with a stirrer, nitrogen inlet, and DEAN-STARK trap, 10.0 grams of 4,5-dichlorophthalic acid, 150 milliliters of xylene, and several crystals of toluenesulfonic acid were added. The mixture was heated to reflux and water was collected in the DEAN-STARK trap over a period often hours. The xylene was distilled off and the solid was collected in a BÜCHNER funnel and allowed to air dry, yielding 8.3 grams of 4,5-dichlorophthalic anhydride.
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| Patent number | US06652970B1 |
| Source dataset | uspto-grants-2003_11 |
| ORD ID | ord-d9b97a3b89b14b2e8638bf557f027858 |
| Source note | uspto-grants-2003_11 |