Octyl phenyl

Three classes of carbamoylmethylphosphoryl extractants were studied for their ability to extract selected tri-, tetra-, and hexavalent actinides from nitric acid. The three extractants are dihexyl-N,N-diethylcarbamoylmethylphosphonate (DHDECMP), hexyl hexyl-N,N-diethylcarbamoylmethylphosphinate (HHDECMP), and octyl(phenyl)-N,N-diisobutylcarbamoylmethylphos-phine oxide 0< >D[IB]CMP0. The above three extrac-trants were compared on the basis of nitric acid and extractant dependencies for Am(III), solubility of complexes on loading with Nd(III) and U(VI), and selectivity of actinide(III) over fission products. 

This paper describes a comparison of the extraction behavior of selected. actinide(III), (IV), and (VI) ions by the dihexyl-N, N-diethyl analogs of carbamoylmethyl-phosphonate and phosphinate and octyl(phenyl)-N,N-diisobutylcarbamoylmethylphosphine oxide. 

As Table II shows, the octyl(phenyl)-N,N-diisobutyl CMPO compensates, to a large degree, for the unfavorable properties... 

An additional material based on the extractant octyl-phenyl-N,N-diisobutyl-carbamoylmethylphosphine oxide, or CMPO, (marketed under the name TRU-Spec) has also been widely utilized for separations of transuranic actinides (Horwitz et al. 1993a) but is also useful for uranium-series separations (e.g., Burnett and Yeh 1995 Luo et al. 1997 Bourdon et al. 1999 Layne and Sims 2000). This material has even greater distribution coefficients for the uranium-series elements U (>1000), Th (>10000), and Pa. As shown in Figure 1, use of this material allows for sequential separations of Ra, Th, U, and Pa from a single aliquot on a single column. Separations of protactinium using this material (Bourdon et al. 1999) provide an alternative to liquid-liquid extractions documented in Pickett et al. (1994). 

An 80/20 mixt of NG/NGc 21 is used to dissolve P-N02Toluene 3 and p-terr-octyl-phenyl diethylphosphate 0.2 parts gelled with NC 1.1, then mixed with AN 56.9, NaN03 12, oat husk meal 2, waxed woodmeal 0.5, woodmeal 1, sulfur 2, starch 0.5 chalk 0.3 parts Ref H.R. Wright et al, BritP713 58 (1954) CA 49, 3537(1955) USP 2716056(1955) ... 

Chromatographic separation is generally carried out on octadecyl, octyl, phenyl, and polymeric reversed-phase columns, although polar stationary phases such as silica (153) or cyanopropyl (141, 142) have been also used in Ure analysis of sedecamycin and pirlimycin residues, respectively. 

At present, liquid chromatography is the method of choice for determining residues of quinolone antibacterials in edible animal products (Table 29.6). Separation is generally carried out on nonpolar reversed-phase columns containing octadecyl, octyl, phenyl, or polymeric sorbents. Either methanol or acetonitrile... 

The catalytic activity of these supported BF3 samples was tested using the reaction of 1-octene with phenol (performed at 85°C using 0.05 M of each reactant, in 100 ml of 1,2 dichlorethane with lg of supported BF3 catalyst). Table 2 shows the phenol conversion and selectivities towards octyl-phenyl ether obtained after 23 hours reaction time. It is clear that the activity of the BF3(H20)2/SiC>2 catalyst prepared in ethanol is superior to the other samples. The activity can thus be correlated with the number and strength of Bronsted acid sites identified on these catalysts using TGIR. 

Good precursors of carbonyl compounds are formed in these processes and many applications deal with such syntheses. A comprehensive review has appeared in a 1991 issue of Organic Reactions [246] (479 references). The synthesis of n-octanal from n-octyl phenyl sulfoxide is described [2A6]. 

The aqueous solutions ofp-iso-octyl-phenyle-(-0-CH2-CH2-) OH show a demixing phenomenon at high T. Above a turbidity point Tt two phases appear (Fig. 8). The turbidity point Tr is a measure of the HHB-balance too. Fig. 24 shows Tt as function of the concentration CH1 of PlOP-n. With the length n of the ethylenoxid... 

There are two kinds of ionophores charged ones, which are called liquid ion exchangers, and neutral carriers. Because they are mobile in both the free and in the complexed form, mobilities of all species are again part of the selectivity coefficient together with the ion-exchange equilibrium constant. The best-known neutral ionophore is valinomycin (Fig. 6.15a) which shows a 1,000 1 selectivity for K+ in preference to Na+ and no pH dependence. In its uncomplexed form, it is electrically neutral. A better-known representative is di(n-octyl phenyl) phosphonate (Fig. 6.15c), which shows good selectivity for calcium ion and is relatively pH insensitive. 

Fig. 6.15 (a, b) Neutral ionophore valinomycin with the cavity for binding potassium ion. (c) Charged ionophore di n-octyl phenyl phosphonate used in calcium ion-selective electrodes... 

Takeuchi, M., Tanaka, S., Yamawaki, M., Tachimori, S. 1995. Numerical modeling for coextraction of Tc(VII) with U(VI) by n-octyl(phenyl)-N,N-diisobutylcarbamoyl meth-ylphosphine oxide from nitric acid solution. J. Nucl. Sci. Technol. 32 (5) 450 155. 

Brewer, K.N., Herbst, R.S., Todd, T.A., Christian, J.D. 1998. Zirconium extraction into octyl-(phenyl)-N,N-diisobutylcarbamoylmethylphosphine oxide and tributyl phosphate. Solvent Extr. IonExch. 16 (4) 1047-1066. 

Fujii, T., Yamana, H., Watanabe, M., Moriyama, H. 2001. Extraction of molybdenum from nitric acid by octyl(phenyl)-N,N-diisobutylcarbamoylmethyl phosphine oxide. Solvent Extr. IonExch. 19 (1) 127-141. 

Mathur, J.N. Nash, K.L. Thermodynamics of extraction of Am(III) and Eu(EH) from nitrate and thiocyanate media with octyl(phenyl)-N,N-diisobutylcarbamoylmethylphos-phine oxide, Solvent Extr. Ion Exch. 16 (1998) 1341-1356. 

FIG U RE 3.1 n-Octyl-phenyl-W, W -di(/so )butyl-carbamoyl-methyl phosphine oxide (CMPO) used in the TRUEX process. 

The bifunctional extractant octyl(phenyl)-V,V -diisobutylcarbamoylmethylphos-phine oxide and related compounds (16,17) were also studied by SANS to elucidate the size and shape of the macromolecular aggregates formed during metal salt extraction. 

Z. Kolarik and E. P. Horwitz. Extraction of metal nitrates with octyl(phenyl)-n,n-diisobutyl-carbamoylmethyl phosphine oxides in alkane diluents at high solvent loading. Solvent Extr. Ion Exch., 6(1) 61—91, 1988. 

In CC14 and tetrachloro ethylene, the products identified were phosphinic acid (1), phosphinylacetic acid (5), and methyl(octyl)(phenyl) phosphine oxide (3) (40, 41). But gas chromatography alone was not able to identify 50% of the unknown compounds. 

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