Water acetone solution

The only method that has been described for the assay of technical grades of parathion and its formulations is that of Bowen and Edwards (7). The method makes use of the polarograph. The electrolysis is carried out in an acetone-water solution with potassium chloride as the electrolyte and gelatin as the suppressor. An accuracy of 1% is obtained. 

Leaves of Sumac were used for removal of ions in aqueous solution. Tannins were extracted from the leaves of sumac by extracting with 70% (v/v) acetone-water solution. For the total tarmin determination Folin-Ciocalteu method was used and tannin content was found 27%. Various adsorption parameters for the effective removal of Cu + ions by using sumac leaves as an adsorbent from aqueous solutions were studied and optimized. 

Finally Papkov [52] observed that the surface tension of the solvent is a further factor influencing the solubility of cellulose esters. This worker established that the best solvents from a series of liquids resembling each other chemically, e.g. in a homologous range, were characterized by a moderate, optimum surface tension. Liquids having higher or lower surface tensions than this optimum value are worse solvents. The rule is also valid for mixtures. Thus a 50 50 acetone-water solution with a surface tension a = 30.4 dyne/cm caused only a weak swelling of... 

A stock solution of the coupling agent was prepared by mixing the trimethoxy-silane with 10 1 acetone-water solutions. The stock solution concentrations were 2-3 g/100 ml for APMS and AAPS. The solution pH was not adjusted and the experiments were done at ambient temperature (21°C). From our kinetics studies we were convinced that the hydrolysis was completed under these... 

The adsorption isotherms of silane coupling agents from acetone-water solutions onto silica appear to show less coupling agent on the surface compared... 

M.E. Hollein, M. Hammond and C.S. Slater, Concentration of Dilute Acetone-Water Solutions Using Pervaporation, Sep. Sci. Technol. 28, 1043 (1993). 

FIGURE 9.3 The relationship between the pKa s of various ortho-( ) and meta- and para-( ) substituted phenols and the pKa s of the corresponding arylvanadates. The values are for 42% vol/vol acetone/water solutions. For the various phenolic solutions, the pKa of vanadate (V04H2 ) is about 9.5 and dependent on solution properties. A correction to a value of 9.55 was made for all solutions. Data taken from Galeffi and Tracey [4]. Not all phenols have been identified in the figure. 

L of the acidified acetone-water solution was sufficient to elute the A-4696 activity from the carbon column. The eluate containing the A-4696 activity as treated with a saturated barium hydroxide solution, in order to form a precipitate of barium sulfate, thus removing the sulfate ions from the solution. The mixture was filtered and the barium sulfate precipitate was discarded. The filtrate containing the A-4696 activity was concentrated under vacuum to dryness. The resulting residue comprising the A-4696 activity amounted to approximately 80.0 g. 

Four types of condensed tannins were studied in the adhesive dips 1) extracts from pecan nut pith obtained by digestion with aqueous sodium sulfite-sodium carbonate solutions, 2) purified tannins from southern pine bark, 3) extracts from southern pine bark obtained by digestion with aqueous sodium sulfite-sodium carbonate solutions, and 4) tannins extracted with acetone-water solutions from peanut skins. 

Standard herbicidal formulations in the absence of surfactant were prepared by dissolving the highest intended dose of each TFMS compound in a 1% acetone-water solution. The small amount of acetone (necessary to effect solution of some of the more lipophilic series members) was used in all formulations for consistency. Standard herbicidal formulations in the presence of surfactant were prepared in a similar fashion, except that the 1% acetone-water contained in addition 0.1% (w/v) Tween 80. 

Again, large negative heats of solution indicate especially strong solute-solvent interactions, and such solutions are expected to show negative deviations from Raoult s law. Both components have a lower escaping tendency in the solution than in the pure liquids. This behavior is illustrated by an acetone-water solution where the molecules can hydrogen-bond effectively ... 

Recently an indication of path A has been shown by investigating solvolysis of the 7-substituted norbornadiene complexes of Cr, Mo, and W 90). It was found that in an 80% acetone-water solution at 25°C,(t7-C7H7C1)Mo (CO)4 gives free 7-norbornadienol instead of the expected (t7-C7H70H)Mo (CO)4- Moreover, the solvolysis rate constant was of the same order of magnitude as that for free 7-chloronorbornadiene. All these data support fast dissociation of the type... 

Ionization constants of 2-carboxypiperazine and the three dicarboxylic acids have been determined (1684), and the nucleophilic reactivity of piperazine compared to other amines in reactions with l-chloro-2,4-dinitrobenzene has been measured (1685). The rate of quaternization of l-ethoxycarbonyl-4-methylpiperazine with allyl bromide (/ = 2.25 1/mol min) and methyl iodide (10A = 1.22) have been measured in acetone-water solution (1686). The composition and structure of the 2-methylpiperazine-carbon disulfide complex has been investigated it was a mixture of l-dithiocarboxy-3-methylpiperazine (138) and the 2-methylpiperazine salt of l,4-bis(dithiocarboxy)-2-methylpiperazine (1687). 

FIGURE 3S.1 The amount of fatty acids and resin acids found in ultrafiltration membranes of varying hydrophilicity after a 30 day test run in an integrated pulp and paper mill at pH 5.3 (the solvent in extraction was an acetone-water solution [9 1]). (Based on data from Puro, L., Taiminen, J., and Nystrdm, M., Desalination, 143, 1, 2002 Huuhilo, T., Vaisanen, P., Nuortila-Jokinen, J., and Nystrdm, M., Desalination 141, 245, 2001.)... 

Triisopropylcarbinyl chloride, for example, is hydrolyzed in acetone-water solution seven times as fast as J-butyl chloride. (See p. 88.)... 

Extraction of seeds and skins by acetone/water solutions... 

Figure 11-15 DSC thermograms for 10% acetone/water and iinipeiiein/XiiHCX) in a 10% acetone/ water solution.

Figure 11-16 DSC thermograms for 20% acetone/water and imipenem/NaHCOs in a 20% acetone/ water solution.

The solubility values for imipenem in the 30% acetone/water solution are 0.72, 0.40, and 0.22 gm/liter at —10°C, — 20°C, and —30°C, respectively. Values for solubilities in the equilibrium solutions at -20°C and -30 C could not be measured. These solubility results indicate that imipenem is slightly soluble in the liquid phases present at equilibrium under the freeze crystallization conditions. Therefore, it may be assumed that the transition from amorphous form to crystalline form is facilitated by the presence of a liquid phase. 

FIGURE 3.7 Electrospray ionization mass spectrum identifying Mn (Me2EBC)(O)(OOH) at m/z = 358 (acetone/water solution containing aqueous HjOj). [Reprinted with permission from [79]. Figure 2. Copyright (2006) American Chemical Society.]... 

In a solution containing high concentrations of thiocyanate and HCl, titanium forms a yellow thiocyanate complex, which has been a basis of a sensitive method for its determination [24,25]. The absorbance can be measured for either an acetone-water solution or an MIBK extract. From a solution of 5.8 M NaSCN and 0.8 M HCl, MIBK extracts 95% of the titanium present, along with most of the reagent (as HSCN). The degree of extraction diminishes if the thiocyanate and HCl concentrations are decreased in the aqueous phase. 

The molar absorptivity of the Ti complex in MIBK is 8.5-10 at 417 nm (in acetone-water solution it is 7.8-10 ). Interfering species include Fe(III), Nb, and Mo. Thiocyanates of those metals may be extracted preliminarily from 4-5 M HCl, the extraction of titanium being only negligible [25]. 

Zosel s explanation is generally accurate concerning the ratio of the hydrocarbon radical to the hydroxyl group. However, ethanol can be extracted from ethanol-water solutions by supercritical ethylene (Paulaitis, Gilbert, and Nash, 1981) and so can acetone from acetone-water solution (Elgin and Weinstock, 1959) a few such inaccuracies still do not detract from the vast amount of data that Zosel provides. 

In a continuous countercurrent train of mixer-settlers, 100 kg/h of a 40 60 acetone-water solution is to be reduced to 10 percent acetone by extraction with pure... 

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