摘要:
The invention concerns derivatives of calixarene having the formula: in which: R1 represents various hydrocarbon groups, R2 and R3 represent an alkyl, cycloalkyl or aryl group or a group having the formula: O(CH2)n[O(CH2)p]q OR4, or form a heterocyclic group with the nitrogen atom, and, n equals 6, 7 or 8. These derivatives can be used for extracting strontium from aqueous solutions.
摘要翻译:本发明涉及具有下式的杯芳烃的衍生物:其中:R 1表示各种烃基,R 2和R 3表示烷基,环烷基或芳基或具有下式的基团:O(CH 2) n [O(CH 2)p] q OR 4,或与氮原子形成杂环基,n等于6,7或8.这些衍生物可用于从水溶液中萃取锶。
摘要:
The invention involves the separation of actinides and lanthanides by membrane transport by means of a calixarene. To this end, a first aqueous solution containing at least one metal from the group of actinides and lanthanides to be separated is placed in the compartment 3 and a second aqueous re-extraction solution such as a 10−2 mol/L solution of HNO3 is placed in the compartment 5. The membrane 6 is a microporous membrane of which the pores are filled with a liquid organic phase (calixarene and diluent) chosen in order to favour membrane transport of the metal(s) to be separated from compartment 3 to compartment 5.
摘要:
The invention relates to novel phosphorus-containing dendrimers having a core, at least one generation and an external layer consisting, completely or partly, of identical or different units, the said units satisfying the following formula (I): in which R1 and R2, which may be identical or different, are alkyl, alkoxy or aryl groups. These dendrimers are used for extracting actinides and lanthanides from aqueous solutions containing them.
摘要:
The invention relates to new calixarenes according to the formula: wherein: R1 is an alkyl or aryl group, or a hydrogen atom, R2 and R3, which may be identical or different, are alkyl or aryl groups, n is an integer ranging from 2 to 8, and p is an integer ranging from 4 to 8. Said calixarenes may be used to extract actinides and lanthanides from aqueous solutions.
摘要:
The invention relates to new calixarenes according to the formula: wherein R1 and R2, which may be identical or different, are alkyl, alkoxy or aryl groups, and n is an integer equal to 2, 3 or 4. Said calixarenes may be used to extract actinides and lanthanides from aqueous solutions.
摘要:
The invention involves a process for separating actinides and lanthanides by liquid-liquid extraction by means of calixarenes. These calixarenes have the formula: with R1 and R2 being alkyl groups or o-nitrophenoxy alkyl groups and R3 and R4 being aryl groups, and they are used in an organic liquid phase containing an organic diluent. The diluent and the calixarene concentration of the organic phase are chosen so as to ensure an enrichment of the organic phase with the actinide(s) and/or lanthanide(s) to be separated from an aqueous acid or saline solution.