| 205 / | HD | ELECTROLYSIS: PROCESSES, COMPOSITIONS USED THEREIN, AND METHODS OF PREPARING THE COMPOSITIONS |
| 334 | DF | ELECTROLYTIC SYNTHESIS (PROCESS, COMPOSITION, AND METHOD OF PREPARING COMPOSITION) {21} |
| 615 | DF | .~ Preparing nonmetal element {8} |
| 618 | DF | .~.~ Halogen produced {3} |
| 620 | DF | .~.~.~ Chlorine and hydrogen produced {1} |
| 621 | | .~.~.~.~ Utilizing specified metal or alloy cathode |