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Case 13
After a R&D personnel added tert-butyl lithium dropwise , when he removed the constant pressure dropping funnel, he did not notice that there was a drop at the bottom of the funnel.
Figure 25-17 Screenshot of the accident video
There are many similar accidents.
Case 14
A researcher accidentally spilled petroleum ether on the countertop of the fume hood, and the party burned when he wiped it with straw paper, as shown in Figure 25-18 and Figure 25-19
Reason analysis: the petroleum ether on the countertop evaporates, and the specific surface area of the straw paper is large.
Lesson: When using low-boiling organic solvents such as petroleum ether, stay away from electrical appliances in use, and keep the fume hood tidy at all times to avoid fire and cause greater losses
Case 15
A researcher mistakenly poured a bottle of nitromethane into a bottle containing solid gas sodium oxide as tetrafluorofuran.
Reason analysis: This is a typical misoperation accident caused by carelessness and not carefully checking the chemical reagents to be used
Case 16
A researcher performs a catalytic hydrogenation reaction and uses a hydrogen balloon to vent hydrogen into the reaction flask
Reason analysis: Many such accidents are caused by not keeping in mind the dangerous characteristics of palladium-carbon and other catalysts and doing things incompletely