Because this will often cause violent boiling and flooding, and it is also prone to accidents such as fires. It should be cooled to below the boiling point. It is best to add zeolite. When distilled again, the used zeolite may fail because it discharges some gas after cooling and absorbs liquid in its pores, so it cannot be sealed and dried. The preserved non-phoenix stone will continue to be used and new zeolite will be added.
Boiling additives are added to introduce gasification center to ensure the smooth boiling. When zeolite is added when the liquid is close to boiling, the liquid will suddenly release a large amount of steam and spray a large amount of liquid from the bottle mouth of distillation, which will cause danger.
If it must be added, the heat source must be removed first, and the liquid to be heated can only be accelerated after it is cooled below the boiling point.
Extended data:
More than 200 years ago, France invented a household distillation vertical tower to produce 95% ethanol, which was recognized by the distillation community. More than 30 years later, British inventors invented a rectifying tower for producing 99-99.9% ethanol on the basis of distillation vertical tower, and for the first time, the word "alcohol" was produced, which means the essence of wine.
Distillation columns are arranged in methanol or ethanol production plants, with a height of 20-120m and a diameter of 0.3-13.5m, all of which originated from French and British inventors. The maximum annual output of distillation column can reach 500,000-300,000 tons, which is the main purification method of organic solvents.
Since 2005, Anyang Haichuan Institute of Chemical Technology (formerly the Institute of Contemporary Chemical Engineering in Anyang High-tech Zone) has started its unique purification research, which many domestic users call tower-free distillation (rectification) and tower-free refining.
20 10 12 tower-less refining equipment came out and obtained patent certificate; 2065438+0 1 March-August, no-tower distiller and no-tower distiller came out, and the patent was granted1,which passed the preliminary examination.
A large pharmaceutical production company in Shangqiu City, Henan Province carried out an industrial purification test of 20% ultra-low content waste methanol, and the initial fraction content was 86%. 20 1 1 A large pharmaceutical company in Anyang City, Henan Province conducted an industrial purification test on 82% of the waste ethanol, and the distillation without tower [extended range] machine purified it to 98%.
The content of methyl acetate in ethanol is 0. 1%, which is obviously better than the separation effect of 0.26% in the distillation tower of this factory. After 20 10, users attach great importance to tower-less distillation equipment in the purification of many organic solvents. The institute is not only committed to the research and development of separation equipment, but also strives to raise the accumulated rich purification experience to the theoretical level.
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