液氮＋氯苯可以控制在－45度

这里有个表，看看吧
The table below gives the lowest temperature that can be obtained from a
mixture of the inorganic salt with finely shaved dry ice. With the organic
substances, dry ice (－78 摄氏度) in small lumps can be added to the
solvent until a slight excess of dry ice remains or liquid nitrogen (-196 摄
氏度) can be poured into the solvent until a slush is formed that consists
of the solid-liquid mixture at its melting point.

Substance               Quantity of   Quantity of  Temperature,摄氏度
                       substance, g    water, mL
Ammonium nitrate                100         94         -4.0
Sodium nitrate                   75        100         -5.3
Sodium thiosulfate 5-water      110        100         -8.0
Sodium chloride                  36        100        -10.0
Sodium nitrate                   50        100        -17.8
Sodium bromide                   66        100          -28
Magnesium chloride               85        100          -34
Calcium chloride 6-water        100         81        -40.3
                                100         70          -55


      
Ethylene glycol           -13    Acetone            -77
1,2-Dichlorobenzene       -17    Ethyl acetate      -84
Carbon tetrachloride    -22.9    2-Butanone         -87
Bromobenzene              -31    Hexane             -95
Methoxybenzene            -37    Methanol           -98
Bis(2-ethoxyethyl) ether  -44    Carbon disulfide  -112
Chlorobenzene             -45    Bromoethane       -119
N-Methylaniline           -57    Pentane           -130
p-Cymene                  -68    2-Methylbutane    -160
【 在 linak (metallica) 的大作中提到: 】
: 上次有人说用氯化镁加冰，试了试
: 开始没注意，拿了个6个结晶水的氯化镁来试，感觉很艰难的才能降到零下27度左
: 右，主要是氯化镁一加到冰上去的时候马上就产生很多水，把水吸出去吧，感觉
: 盐好像也被弄出去了。很不好控制温度，开始以为是结晶水的原因，后来用无水
: 氯化镁，居然更难了，也就零下10度
: 做过的ggjj给出个主意吧，就这样都这么难控制，做反应的时候岂不是更不爽了
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FROM 10.22.93.12