[en] Sorptional properties of solid extragents (SE) prepared by means of introduction of extragent (hdehp) in the matrix of styrene and divinylbenzene polymer in the cold have been studied. In the case of SE synthesis during heating extragent destruction is observed. Results of actinide element (curium and californium) extraction with SE are compared with the results of liquid extraction. The higher the content of extragent in SE and the lower the acidity aqueous solution of elements extracted are the close is similarity of SE with liquid extraction. However at a high content of extragent in SE its specificity as a phosphate derivative decreases. With introduction of TBP as dilutant of hdehp the specificity increases sharply but selectivitydecreases. SE are worse than liquid extraction in capacity chracteristics: extragent capacity in SE can not be used for 100 percent. A method of qualitative determination of weak sorptional properties of the matrix material is developed