Alkyl alcohols distribution coefficients

Table 5 shows the evaluated distribution coefficients of the homologous alkyl alcohols. It is shown that the... 

A comparison of the effect of the structure of phosphate esters on uranium extraction from nitrate media shows that the esters from secondary alcohols give higher uranium distribution coefficients (D s) than those from primary alcohols, phenyl esters extract uranium less strongly than alkyl esters, and benzyl esters are intermediate in extractant strength for uranium (24). 

In a determination analogous to the GC method, AE may be reacted with hydriodic acid to yield the alkyl iodide analogs of the starting alcohols. These can be analyzed by HPLC to give the alkyl chain length distribution, with a coefficient of variation of about 2% (46). 

In the case of AE, HI or HBr fission produces the alkyl iodides or bromides derived from the starting alcohols, as well as the decomposition products from the ethoxy chain described above. The alkyl halides can be readily characterized as to chain length and isomer distribution by gas chromatography (72). An eight-laboratory collaborative study of AE characterization by HI cleavage-GC gave coefficients of variation between laboratories of 1-2% for determination of the major components of a linear alcohol initiator and about twice that for branched alcohols (77). The ethyl and propyl compounds from decomposition of the alkoxy chain may be quantified if the E/P ratio or degree of ethoxyla-tion is to be determined, but such information is more easily available from NMR analysis. 

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