反应详情

189 g of sodium sulfite was dissolved in 600 ml of water, the solution was warmed at a temperature ranging from 60° to 70° C., 68 g of 1-naphthalenesulfonyl chloride was added and then the mixture was reacted at a temperature ranging from 50° to 60° C. for 5 hours. Insolubles were filtered off, the temperature of the reaction solution was brought back to room temperature and the solution was acidified by addition of conc. hydrochloric acid. The resulting precipitates were collected by filtration to give 55 g of 1-naphthalene sulfinic acid.

1. temperaturethe solution was warmed at a temperature
2. customranging from 60° to 70° C.
3. customthe mixture was reacted at a temperature
4. filtrationInsolubles were filtered off
5. customwas brought back to room temperature
6. additionthe solution was acidified by addition of conc. hydrochloric acid
7. customThe resulting precipitates
8. filtrationwere collected by filtration