Di-2-ethylhexyl hydrogen phosphate

The O or S atoms in P=0 and P=S groups may act as electron donors although these groups form relatively weak complexes with electron acceptor compounds such as nonpolarizable, more electropositive (ie, hard) acids, including protons (14). Use is made of this property in the recovery of uranium from wet-process phosphoric acid by extractants such as trioctylphosphine oxide [78-50-2] and di(2-ethylhexyl) hydrogen phosphate [298-07-7]. 

The reaction of 2-ethylhexanol and P0C13 or P4O10 has been studied in an effort to maximize the formation of di-2-ethylhexyl hydrogen phosphate. It was found that P0C13 was the preferred agent to obtain a pure product [23]. 

Kuzin, V.D., Semushin, A.M., Romanovskii, V.N. 1969. Stability of di(2-ethylhexyl) hydrogen phosphate against radiation. High Energy Chem. 3 248-249. (Translated from Khimiya Vysokikh Energii 3 274-275.)... 

Attempts have also been made to solvent-extract thorium directly from the sulphate liquor obtained by the acid breakdown of monazite. Tributyl phosphate can be used as the solvent provided a large concentration of nitric acid is added to the liquor before extraction. In order to make the process economic, a high proportion of the nitric acid must then be recovered by distillation of the raffinate liquor. Processes are also being developed which are based upon the use of higher alkyl phosphate or amine solvents to extract from sulphate solutions without the addition of nitric acid, as in the case of uranium. For example bis(l-isobutyl 1-3-5 dimethyl-hexyl) amine, di-2-ethylhexyl hydrogen phosphate and Primene JM-T have been used. 

Chemical Designations - Synonyms Bis-(2-ethylhexyl) Hydrogen Phosphate Di-(2-ethylhexyl) Phosphate Di-(2-ethylhexyl) Acid Phosphate Chemical Formula [CH3CH2CHiCH2CH(CiH3)CHiO]2POOH. 

Beilstein Handbook Reference) AI3-23072 Bis(2-ethylhexyl) hydrogen phosphate Bis(2-ethylhexyl) phosphate BRN 1712988 D 2EHPA Dehpa extractant EINECS 206-056-4 Escaid 100 Hdehp HSDB 341 Hydrogen bis(2-ethylhexyl) phosphate Kyselina di-(2-ethylhexyl)fosforecna Phosphoric acid, bis(2-ethyl-hexyl) ester. 

Synonyms Bis (2-ethylhexyl) hydrogen phosphate Bis (2-ethylhexyl) orthophosphoric acid Bis (2-ethylhexyl) phosphate Bis (2-ethylhexyl) phosphoric acid Di-2-ethylhexyl phosphoric acid D2EHPA 2-Ethyl-1 -hexanol hydrogen phosphate Empiricai C16H35O4P... 

Yang et al. [367] prepared three-component composites, doped-P(ANi)/dis-perser/polyolefin via an extrusion process. They found percolation thresholds as low as 3 w/w% P(ANi) using the dopant bis(2-ethylhexyl hydrogen phosphate), the disperser lauryl gallate and LDPE. A twin-screw extruder at 130 - 150 °C and a screw speed of 100 rpm for 10 mins, were used. Films were prepared by hot pressing at 135 to 155 and 3 tons pressure. 

BIS(2-ETHYLHEXYL)ORTHOPHOSPHORICACID BIS(2-ETHYLHEXYL)PHOSPHORlC ACID DEHPA EXTRACTANT DI(2-ETHYLHEXYL)PHOSPHATE DI-2(ETHYLHEXYL)PHOSPHORIC ACID DI-(2-ETHYLHEXYL)PHOSPHORIC ACID (DOT) 2-ETHYL-l-HEXANOL HYDROGEN PHOSPHATE HDEHP KYSELINA DI-(2-ETHYLHEXYL)FOSFORECNA... 

Separation by solvent extraction Uranium can be extracted from aqueous solutions using extraction agents into the solvent phase, from which it can be stripped. The extraction agents used are phosphorus compounds such as di-(2-ethylhexyl)-phosphate, tri-n-butyl-phosphate and tri-n-octylphosphine oxide as well as primary, secondary and tertiary amines in salt form or as quaternary ammonium salts. The extraction agents are diluted with inert hydrocarbons, preferably kerosene, to concentrations of 4 to 10% by volume. The solubility of the amine salts, particularly the hydrogen sulfates, chlorides and nitrates is increased by adding long chain alcohols (e.g. isodecanol). 

In the reduction stripping process uranium(IV) in the raw wet process acid is oxidized to uranium(Vl) by treatment with sodium chlorate, hydrogen peroxide or air at 60 to 70°C, the uranium(VI) formed being extracted with trioctylphosphine oxide/di-(2-ethylhexyl)phosphate in kerosene and the resulting solution finally reductively stripped repeatedly with aqueous iron(II) solutions. This results in an enrichment by a factor of 40. After oxidation of the stripped solution with sodium chlorate or ambient oxygen and renewed extraction of the uranium(VI) formed with trioctylphosphine oxide/di-(2-ethylhexyl)phosphate, the phosphoric acid is removed from the organic phase by washing. The uranium(Vl) is then stripped with ammonium carbonate and precipitated as the ammonium diuranyl-tricarbonato-complex. This is filtered off, washed and calcined. 

DI-(2-ETHYLHEXYL) PHOSPHATE (298-07-7) Combustible liquid (385°F/196°C oc). Contact with strong oxidizers, strong acids may cause fire or explosion. Reacts violently with antimony(V) pentafluoride. Incompatible with lead diacetate, magnesium, silver nitrate. Corrosive to metals, forming flammable hydrogen gas. 

Ethyl-1-hexanol hychogen phosphate. See Di (2-ethylhexyl) phosphate 2-Ethyl-l-hexanol, hydrogen sulfate, sodium salt SeeSodium 2-ethylhexyl sulfate... 

Di(2-ethylhexyl) tetrabromophthalate. See Tetrabromobis (2-ethylhexyl) phthalate Diethyl hydrogen phosphate. See Ethyl acid phosphate... 

EthyM-hexanol ester with diphenyl phosphate. See Diphenyl octyl phosphate 2-Ethyl-1-hexanol hydrogen phosphate. See,Di (2-ethylhexyl) phosphate 2-Ethyl-1-hexanol, hydrogen sulfate, sodium salt. See Sodium 2-ethylhexyl sulfate 2-Ethylhexanol phosphate. See Trioctyl phosphate 2-Ethylhexyl phosphate 2-Ethyl-1-hexanol phosphate 2-Ethylhexanol, phosphate triester. See Trioctyl phosphate 2-Ethyl-1-hexanol silicate. See Tetrakis (2-ethylhexoxy) silane... 

Additives used in final products Piasticizers acetyl triethyl citrate, di-(2-ethylhexyl) phthal-ate, diethyl phthalate, dimethyl phthalate, dimethyl sebacate, dioctyi sebacate, polyethylene glycol, polypropylene glycol, sulfolane, toluenesulfonamide derivatives, tri-(2-ethylhexyl) phosphate, triacetin, tributyl citrate, triethyl citrate, triphenyl phosphate Antistatics silver-doped vanadium pentoxide, vanadium pentoxide Antiblocking hydrogenated tallow amide, laponite, silica, talc Release magnesium stearate, sodium benzoate Slip silicone oil ... 

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