Di-n-butyl phosphate

SYNS DIBUTYL ACID PHOSPHATE DIBUTYL HYDROGEN PHOSPHATE DIBUTYL PHOSPHATE DI-n-BUTYL PHOSPHATE... 

Most frequently, diphenyl and di-n-butyl phosphates are used. As such, Singh and coworkers [471-474] introduced the cyclic propane-1,3-diyl phosphates. Additionally, Seeberger and coworkers [277,475-482] have recently applied glycosyl phosphates for the synthesis of various oligosaccharides both in solution and in solid-phase syntheses. 

Forbes and Silver [40] published data directly comparing the alkyl ester tri-n-butyl phosphate and the aryl ester tricresyl phosphate. Table 11-13 shows the details of this comparison as well as wear data for the acid ester di-n-butyl phosphate. The wear/load index and the initial seizure load show substantially no discrimination between tributyl phosphate and tricresyl phosphate and very little advantage of the compounded oil over the base oil. The low-load wear test distinctly shows better performance with tricresyl phosphate. The data for di-n-butyl phosphate are at variance with the hypothesis that hydrolytic degradation to the acid ester is the first step in the antiwear action of neutral phosphate esters. On the other hand, Bieber, Klaus and Tewksbury [41] separated acidic constituents from commercial tricresyl phosphate by preparative chromatography, and on blending these constituents back into the original tricresyl phosphate at various concentrations they observed enhancement of antiwear action in the four-ball test, as shown in Fig. 11-7. It should be noted that Bieber et at. worked with only 0.051% phosphorus in the lubricant, which may explain the sensitivity they observed to acid impurities. 

Figure 11-10. Comparison of organic phosphates, phosphonates and phos-phinates as lubricant additives. Four-ball test 60 minutes, 15 kg load, 1500 rpm. 4 mmoles of additive per 100 gm of white oil solution. Neutral esters o. Acids or acid esters A. 1 n-Butyl di-n-butylphosphinate. 1 Di-n-hexylphosphinic acid, la Di-n-octylphosphinic acid. 2 Di-n-butyl n-hexylphosphonate. 3 Di-n-butyl phenylphosphonate. 4 Tri-n-butyl phosphate. 4 Di-n-butyl phosphate. 5 Diethyl benzyIphosphonate. 6 Diethyl o-nitrophenylphosphonate. 7 Di(2-ethylhexyl) phosphate. 8 Dilauryl phosphate. 9 Tricresyl phosphate. From data by Forbes and Silver [40] and by Forbes and Battersby [46].

Although TBP is a relatively stable organic compound, it does undergo slow hydrolysis to form di-n-butyl phosphate (DBP). Although the presence of DBP increases the distribution coefficients of uranium, plutonium, and other actinides, it interferes with the separation of plutonium from uranium, and it makes complete stripping of these elements difficult. DBP forms an insoluble compound with thorium. DBP formation is appreciable only when the... 

The phase composition of the VOSO4-K2SO4 system at 360 and 500 °C has been investigated using X-ray diffraction and i.r. spectroscopy the formation of 2 1, 1 1, and 1 2 double salts was confirmed. E.s.r. spectroscopy has been used to follow the extraction of VO ", from aqueous solutions by di-n-butyl phosphate in hexane, and monomeric and trimeric V0 02P(0Bu)2 2 complexes were identified. [V0 02p(0Bu)2 2]3 was isolated as a crystalline solid from the hexane solution and shown to contain a magnetic exchange interaction between the three metal centres. The hypophosphito-complex. 

Di-n-butyl cyclohexylphosphonate [ 1085-92-3] M 245.4. crystd three times from hexane. For method see tributyl phosphate. 

Di-n-butyl n-butylphosphonate [78-46-6] M 250.3, b 150-151°/10mm, 160-162°/20mm, n 1.4302. Purified by three recrystallisations of its compound with uranyl nitrate, from hexane. For method, see tributyl phosphate. 

Various organic extractants may be used, including butyl and amyl alcohols, di-isopropyl ether, tri-n-butyl phosphate, and tri-2-ethylhexyl phosphate. The fluoride remains with the... 

Methyl vinyl ketone, see 2-Methyl-l, 3-butadiene Molinate sulfoxide, see Molinate Monobutyl phosphate, see Tributyl phosphate Monobutyl phthalate, see Benzyl butyl phthalate Mono-n-butyl phthalate, see Di-n-butyl phthalate Monobutyl phthalate, see Di-n-butyl phthalate Monochlorobenzidine, see 3,3 -Dichlorobenzidine Monochlorobiphenyl, see Chlorobenzene, PCB-1221, PCB-1254... 

Polymer Dimethyl cyclohexyl-o-phthalate Tpi - +6° Trier esyU phosphate Tpt - -30° Di-n-hexyl-o-phthalate Tpi - -57° Di-n-butyl-adtpate Tpl = -< 5 ... 

Di-poly Aldehydes (and ketones) FFAP QF-I, Porapak-Q, Porapak-QS Apiezon L, M carbowax 400, 750, 1000, 1500, 1540 di-n-butyl phthalate diethylene glycol succinate ethylene glycol succinate Hallcomid M18 squalene tricresyl phosphate 1,2,3-tris (2-cyanoethoxy) propane Ucon series... 

Various organic extractants may be used, including butyl and amyl alcohols, di-isopropyl ether, tri-n-butyl phosphate, and tri-2-ethylhexyl phosphate. The fluoride remains with the calcium chloride solution, from which it may be recovered for sale or disposal. The process was invented in 1957 by A. Baniel and R. Blumberg at Israel Mining Industries, Haifa. 

Tetra-n-butylammonium acetate, 442 Tetra-n-butylammonium chromate, 443 Tetra-n-butylammonium di-f-butyl phosphate, 443... 

Tetra-n-butylammonium di-r-butyl phosphate, [(CH3)3CO]2PON[C4Hg-n]4 (1). Mol. wt. 451.7, m.p. 108-110°. The salt is prepared by reaction of potassium di-(-butyl phosphate with tetra-n-butylammonium hydrogen sulfate in aqueous NaOH-CHjCU (96% yield). 

Tri-n-butyl phosphate and di-2-ethyIhexyl phosphoric acid (HDEHP) have been mainly used as extractants in several hydrometallurgical operations in the nuclear fuel cycle. Shukla and Mishra [27] have studied the extraction as well as transport behavior of uranium through BLM using 40% TBP in dodecane. The transport of by TBP at the feed-membrane... 

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). 

The isotopic analyses applied to the water samples derived from the Lippe river longitudinal profile comprised main contaminants as illustrated above and described intensively in chapter 3.1.1. In detail stable carbon isotope ratios of tri-n-butyl phosphate (TBP), tris(chloroethyl)phosphate (TCEP), 2,4,7,9-tetramethyl-5-decyne-4,7-diol (TPDB), di- -butylphthalate, bis(2-ethylhexyl)phthalate (DEHP), galaxolide, tonalide, and squalene were determined. Further on, the internal standard d34-hexadecane was analysed simultaneously. Noteworthy, several compounds presented were also determined in the Rhine river samples. All results are summarized in Figure 7. 

Forbes and Silver [40] made a systematic comparison of organic phos-phonates, phosphates and phosphinates based on the results of the 60-minute four-ball wear test under a 15 kg load at 1500 rpm. On plotting the wear data for n-butyl di-n-octylphosphinate, di-n-butyl n-hexylphosphonate, di-n-butyl phenylphosphonate, diethyl benzylphos-phonate, diethyl o-nitrophenylphosphonate and tri-n-butyl phosphate against the ionization constants of the corresponding parent acids (expressed as pK ), the solid curve of Fig. 11-10 was obtained. This led them to the hypothesis that the involvement of carbon-phosphorus bonding... 

Beilstein Handbook Reference) BRN 2140519 Butyl phenyl phosphate ((BuO)2(PhO)PO) CCRIS 4604 Di(n-butyl) phenyl phosphate Dibutyl phenyl phosphate EINECS 219-772-7 HSDB 2604 Phosphoric acid, dibutyl phenyl ester. 

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