A TwoTemperature Regime for the Concentration of Alkali Solutions on Phenol–Formaldehyde Sorbentsстатья
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 25 сентября 2013 г.
Аннотация:The new phenomenon of a twotemperature nonreagent concentration of alkali solutions on sor
bents based on the phenol–formaldehyde resin Amberlit XAD 761, PFR1.4/0.7, and sulfonated phenol–
formaldehyde ionite KU1 was investigated. It was found that during an alkali solution’s passage through a
column with a sorbent and a periodical change in temperature in the “cold” stage, the concentration of alkali
in the filtrate appeared to decrease, while in the “hot” stage, the alkali concentration appeared to increase. It
was shown that the increase in alkali concentration in a solution in contact with phenol–formaldehyde resin
is determined by the ionexchange properties of the phenol groups, and is associated with an increase in water
dissociation upon a rise in temperature.