Calixarenes are condensation products of phenols to substituted and formaldehyde in an alkaline medium 1. In this work, the extraction is carried out from an aqueous phase to an organic phase through the formation of complexes of sodium metal and potassium with the macrocyclic ligand calixarene p- tbutilcalix [4 ] arene tetraetanoato acetate ( L ) dissolved in chloroform the pH of 5, 7.5 and 8.5 . The absorbance of the alkali metal picrates ( - , K + Pi - , Na + Pi Pi - = 2,4,6 trinitrophenol ) was measured , and the complexes formed L M + , Pi -org organic phase at 310 nm . Experiments show that the extraction calixarene ( L ) ligand extracted at pH 7.5 to 72.3% sodium ion (I) in an aqueous solution of 2 to 20 ppm of concentration and extraction 35.6 % for potassium ion (I ) under the same conditions.

Calixarenes are condensation products of phenols to substituted and formaldehyde in an alkaline medium 1. In this work, the extraction is carried out from an aqueous phase to an organic phase through the formation of complexes of sodium metal and potassium with the macrocyclic ligand calixarene p- tbutilcalix [4 ] arene tetraetanoato acetate ( L ) dissolved in chloroform the pH of 5, 7.5 and 8.5 . The absorbance of the alkali metal picrates ( - , K + Pi - , Na + Pi Pi - = 2,4,6 trinitrophenol ) was measured , and the complexes formed L M + , Pi -org organic phase at 310 nm . Experiments show that the extraction calixarene ( L ) ligand extracted at pH 7.5 to 72.3% sodium ion (I) in an aqueous solution of 2 to 20 ppm of concentration and extraction 35.6 % for potassium ion (I ) under the same conditions.

In this paper the measurement of the activity of the catalyst type Ti02 anataza to different experimental conditions, in a display of yellow textile pigment yellow 50, pyrex used as glass reactor was performed , performing the following tests: 1) bubbling oxygen without the presence of catalyst exposed to ultraviolet light at room 2 temperature ) bubbling oxygen with catalyst and the presence of ultraviolet light at different temperatures , the results from these tests are compared , and a higher activity was obtained when the samples were sparged with oxygen and irradiated with UV lamp , visible and heated to 338 K. this pigment demineralization by measuring the UV - visible concentrations was found . The catalyst , titanium oxide ( Ti02 ) anataza type was characterized by the method of X-ray diffraction

In this paper the measurement of the activity of the catalyst type Ti02 anataza to different experimental conditions, in a display of yellow textile pigment yellow 50, pyrex used as glass reactor was performed , performing the following tests: 1) bubbling oxygen without the presence of catalyst exposed to ultraviolet light at room 2 temperature ) bubbling oxygen with catalyst and the presence of ultraviolet light at different temperatures , the results from these tests are compared , and a higher activity was obtained when the samples were sparged with oxygen and irradiated with UV lamp , visible and heated to 338 K. this pigment demineralization by measuring the UV - visible concentrations was found . The catalyst , titanium oxide ( Ti02 ) anataza type was characterized by the method of X-ray diffraction