The polyfluoroalkylation lactonization of 4-pentenoic acid with 4-chlorododecafluorobutyl iodide initiated by several sulfur-oxy acid salts, such as thiourea dioxide, rongalite, sodium sulfite, sodium bisulfite and sodium disulfite, to give the correponding fluorine-containing lactones was intensively studied.

Research on the technology of dealdehyding in the aldehyde-content waste surfuric acid;