Uses of some monomers and polyamides of aminodibenzo - 18 - crown - 6 in solid - liquid extraction of potassium permanganate, dichromate, chromate, thiocyanate and nitrate

Abstract

Crown ethers are very important compounds in the extraction of alkali, alkaline earth, and transition metal ions that by
formation of complexes with these ions .Crown ether polymers may have more ability of extraction compared with their
monomers .In addition these polymers may be less poison, expensive, and can be used as catalysts.
This study had been aimed for using of some monomers and polymers contains dibenzo-18-crown-6 in solid – liquid
extraction of potassium permanganate, dichromate, chromate and thiocyanate.
The value of E% (D) was found to be increased with time in the case of extraction of KNO3, K2Cr2O7 and KMnO4 for
all compounds expect in the case ofDB18C6, cis-DNDB18C6 and trans-DNDB18C6 when were used for KNO3 and
KMnO4 extraction. In case of K2CrO4, a decrease was observed in the values of E% (D) after 15-30 minutes.