BHO short path distillation/what is short path ...
2. The short-path molecular distillation apparatus fills the condensing column with liquid nitrogen in advance, and pre-freezes it. During the period, the liquid nitrogen is less than 1/2 and needs to be added in time; turn on the vacuum pump, adjust to the required temperature,and then pre-heat; 3. Turn on the rotor of the film wiper and try ...
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