A new carboxylic acid extractant, named 2-(dibutylcarbamoyl)benzoic acid, is prepared and its potential for selective solvent extraction and recovery of lead ions from industrial samples was investigated. The slope analysis indicated that the lead ions are extracted by formation of 1:2 metal to ligand complexes. The effect of the parameters influencing the extraction efficiency including kind o...

The downstream separation of 1,3-propanediol from dilute aqueous solution was studied. A process combining reversible reaction of 1, 3-propanediol with acetaldehyde to 2-methyl-1,3-dioxane and a simultaneous extraction of the product by organic solvent appears to be technically feasible and attractive. The dioxane yield was 91-92%, the overall conversion of 1,3-propanediol was ca. 98%, and reco...

Propionic acid is a carboxylic acid produced by fermentation and widely used in chemical, pharmaceutical and food industries. It is used primarily for animal feed preservation, including hay, silage, and grains, and in human foods (mainly in baked goods and cheeses). The growing demand of this acid draws attention towards a more economical energy efficient technology. The conventional methods f...

In present paper, the recovery of propionic acid from aqueous phase by reactive extraction was studied using tri-n-butyl phosphate (TBP) in petroleum ether. Extraction using pure diluent was found to be poor. Using the mixture of extractant-diluent the extraction was significantly improved. Results were presented in terms of distribution coefficient, equilibrium complexation constant, loading r...

Nicotinic acid is widely used in the food, pharmaceutical and biochemical industries. Fermentation technology for the production of nicotinic acid in particular has been known for more than a century and acid have been produced in aqueous solutions. Reactive liquid-liquid extraction for the recovery of the organic acids by a suitable extractant has been found to be a promising alternative to th...

For the solvent extraction of copper from pregnant leach solutions, (PLS) a wide range modern extractants is currently offered on market, and its choice very important issue in production using SX-EW (Solvent Extraction Electrowinning) technology. The purpose this work was to determine optimal extractant for processing productive solutions Almaly deposit SX-EW. studies were carried out with sol...

A sensitive and reliable method is described for the determination of ochratoxin A (OTA) in maize. An extraction and clean-up procedure was used, with chloroform-phosphoric acid as the extractant, and liquid-liquid partition and anion-exchange chromatography (SAX columns) for the clean-up. Quantification of toxin is achieved by high performance liquid chromatography (HPLC). Recoveries were betw...

Solvent extraction is the most widely used method for separation and purification of rare earth elements, organic extractants such as di(2-ethylhexyl) phosphoric acid (P204) di(1-methyl-heptyl) methyl phosphonate (P350) are commonly industrial applications. However, presence impurity ions in feed liquid during can easily emulsify extractant affect quality products. Aluminum ion common liquid, i...

Membrane extraction is a widely employed technique for improving the sensitivity and/or selectivity of a chemical analysis. This paper reports a study on the membrane extraction of aqueous transition metal ions using commercially available Nafion gas dryer assemblies. Though designed and marketed for use with gaseous mixtures, results of this work indicate such assemblies can be effective for t...