Cation-exchange concentration of basic organic compounds from aqueous solution

Synthesis and Identification of Several Schiff Bases Derivatives and Their Antibacterial Activity on Common Pathogenic Bacteria

“…[3,4,5,6] Macro porous caution exchanger including para-chloroaniline, as cautions from aqueous samples. [7] Schiff bases described the formation of N-substituted imines, These compounds typically containing Azomethine group (C=N) have been synthesized via condensation of primary amines with active carbonyls. [8,9] They are represented of the essential compounds attributable to their extensive variety of the industrial application as well as biological activities.…”

“…[14] These compounds have several nomenclatures depending on the nature of the groups (R, R 1 , R 2 ) such as azomethines, imines, benzanils, anils, aldimines and ketimines. [7] Alkyl primary amine ( R-NH 2 ) or aryl primary amine (Ar-NH 2 ) add to the carbonyl group of aldehyde or ketone to initially form carbinol amines, the carbinol amine loses water molecule to form N-substituted imine as the product. [7,15] Scheme [2] , The new compounds were synthesized by intensification between the carbonyl compounds aldehyde , ketones or there derivatives and primary amines in the alcohol absolute by existence of concentrated hydrochloric acid or glacial acetic acid as 3.…”

“…[7] Alkyl primary amine ( R-NH 2 ) or aryl primary amine (Ar-NH 2 ) add to the carbonyl group of aldehyde or ketone to initially form carbinol amines, the carbinol amine loses water molecule to form N-substituted imine as the product. [7,15] Scheme [2] , The new compounds were synthesized by intensification between the carbonyl compounds aldehyde , ketones or there derivatives and primary amines in the alcohol absolute by existence of concentrated hydrochloric acid or glacial acetic acid as 3. (TLC) Thin layer chromatography was carried out by aluminum plates an plated with layer of silica gel, iodine vapor was utilizing for detecting of these compounds.…”

Recovery of heterocyclic amines from dilute aqueous waste streams

“…Various treatment processes such as activated sludge process (Ceh and Chudoba, 1987;Cech and Chudoba, 1987;Gyunter et al, 1983) for morpholine, pyridine, and quinoline; activated carbon (Radeke, 1985;Nikolenko et al, 1986;Martin and Iwugo, 1982;Fox et al, 1988) for pyridine, picolines, and quinoline; cation-exchange resins (Kaczvinsky et al, 1983;Isaeva et al, 1977) and polymeric adsorbents (Deshmukh and Pangarkar, 1984;Stuber and Leenheer, 1983) for various amines have been reported in the literature. Activated sludge process is a widely used and inexpensive process, and it is particularly suited to wastewaters containing small amounts of organic solutes, typically below a few ppm.…”

Determination of chloroaniline traces in environmental waters by selective extraction with two traps in tandem and liquid chromatography

“…Thirdly, the adoption of nonselective extraction procedures is ultimately reflected in great complexity of the final chromatogram when the simultaneous analysis of variously substituted anilines is performed. To enhance selectivity, extraction procedures of aromatic bases from water by cation exchangers have been proposed (8)(9)(10)(11). However, these methods generally have detection limits higher than 1 µg/L.…”