1977 Volume 24 Issue 7 Pages 366-371
Inorganic components and amounts of color substance remained in 1-type strongly basic anion exchange resin which underwent numerous numbers of operation in desalting sugar liquid in the reverse system, were studied to examine actual contamination state. The greater part of inorganic contamination was caused by magnesium compounds and silica, and the organic one was caused by color substance, the majority of which was produced newly from influent in contact with the anion exchange resin. For the purpose of restoring the contaminated resin, various restoration treatment were tested and their restorative efficiencies were investigated. Consequently, it has been found that the best treatment was to employ 10% sodium chloride solution containing 1% sodium hydroxide(70°C)after pre-treatment at high temperature(70°C)with 4% hydrochloric acid solution.
