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Everybody should have heard of most propbably constant boil rectify, this is a kind of special rectification method, need is joined to the middle of rectification tower can with be formed by detached constituent in makings fluid the additive of content of boil of constant of low boiling point, mention the easy rate with detached mixture further thereby. Compare common rectify for, its taller rectification efficiency is clearly.
Can see from this, what the key is in process of constant boil rectify still is the choice of additive, want to accord with the following condition at least: 1, chooses additive can form content of boil of constant of low boiling point with a constituent in makings fluid at least; 2, in the constant boil content that forms in place, the opposite content of additive cannot too much, can produce negative effect to detached effect otherwise; 3, to reduce the thermic load in rectification process, it is the additive that chooses as can little as the content in makings fluid constituent to form constant boil content very; A bit requirement is after the security that should guarantee additive and get a gender easily. In the job, the evaporation that boil rectify uses constant to have all sorts of organic thing commonly and aldehyde, ketone, organic acid and hydrocarbon kind of the depart such as oxide more, although it is betterer than common rectify, but if be being compared with extractive rectify photograph, the advantage is reflected very hard still.