Editing Distillation (section)

===Zone distillation===
Zone distillation is a distillation process in a long container with partial melting of refined matter in moving liquid zone and condensation of vapor in the solid phase at condensate pulling in cold area. The process is worked in theory. When zone heater is moving from the top to the bottom of the container then solid condensate with irregular impurity distribution is forming. Then most pure part of the condensate may be extracted as product. The process may be iterated many times by moving (without turnover) the received condensate to the bottom part of the container on the place of refined matter. The irregular impurity distribution in the condensate (that is efficiency of purification) increases with the number of iterations.
Zone distillation is the distillation analog of zone recrystallization. Impurity distribution in the condensate is described by known equations of zone recrystallization – with the replacement of the distribution co-efficient k of crystallization - for the separation factor α of distillation.<ref>{{cite journal |last=Kravchenko |first=A. I. |title=Зонная дистилляция: новый метод рафинирования|trans-title=Zone distillation: a new method of refining|url=http://dspace.nbuv.gov.ua/handle/123456789/111613 |journal=Problems of Atomic Science and Technology |year=2011 |volume=6 |issue=19 |pages=24–26 |language=ru}}</ref><ref>{{cite journal |last=Kravchenko |first=A. I. |title=Zone distillation: justification |url=http://dspace.nbuv.gov.ua/handle/123456789/79912|journal=Problems of Atomic Science and Technology |year=2014 |volume=1 |issue=20 |pages=64–65 }}</ref><ref>{{cite journal |last=Kravchenko |first=A. I. |title=Разработка перспективных схем зонной дистилляции|trans-title=Design of advanced processes of zone distillation |journal=Perspectivnye Materialy |year=2014 |number=7 |pages=68–72 |language=ru|url=http://j-pm.imet-db.ru/?archive&a=1573}}</ref>