BTBP

The bis-triazinyl bipyridines (BTBPs) are a class of chemical compounds which are tetradentate ligands similar in shape to quaterpyridine.

[1] The 2,2'-bipyridine-N,N-dioxide is then converted into the dicyano compound[2] by treatment with potassium cyanide and benzoyl chloride in a mixture of water and THF.

Uranium(VI) binds to BTBP to form a 1:1 complex, where the axial sites are occupied with the uranyl oxygen atoms.

[9] In recent years the BTBPs have been investigated as reagents for the selective extraction of post-plutonium metals such as americium from nitric acid solutions containing large amounts of lanthanides.

[11] The MOX fuel was dissolved in nitric acid, the bulk of the uranium and plutonium were removed by means of a PUREX type extraction using tributyl phosphate in a hydrocarbon, the lanthanides and the remaining actinides were then separated from the aqueous residue (raffinate) by a diamide based extraction to give, after stripping, a mixture of trivalent actinides and lanthanides.