نتایج جستجو برای: tetraethylenepentamine
تعداد نتایج: 89 فیلتر نتایج به سال:
Removal of Cr(vi) from Alkaline Aqueous Solutions Using Chemically Modified Magnetic Chitosan Resins
Chitosan was cross-linked using glutaraldehyde in the presence of magnetite. The resin obtained was chemically modified through the reaction with tetraethylenepentamine followed by glycidyl trimethylammonium chlorid to produce chitosan bearing amine (R1) and chitosan bearing both amine and quaternary ammonium chloride moieties (R2), respectively. The quaternary amine resin (R2) showed a higher ...
Two water-soluble N-containing additives without sulfur and phosphorus, hexanamide with tetraethylenepentamine (EEHA) benzotriazole amide diethylenetriamine (BTAA), were synthesized used as in the oil-in-water emulsion to investigate effect of amino ring on tribological properties emulsion. The results showed that EEHA/BTAA exhibited wear resistance under all tested conditions. This may be attr...
Two types of lanthanide selenidostannates(IV) first prepared under the same solvothermal conditions.
Two types of lanthanide selenidostannates(iv) [Ln2(tepa)2(μ-OH)2Sn2Se6] {Ln = Y(), Pr (), Dy (), Er (), Tm (); tepa = tetraethylenepentamine} and [Ln2(tepa)2(μ2-OH)2Cl2]2[Sn4Se10]·4H2O {Ln = Y (), Dy (), Er (), Tm ()} have been synthesized under identical solvothermal conditions and characterized structurally. Type I (, , , and ) displays 1-D neutral chains [Ln2(tepa)2(μ-OH)2Sn2Se6]n, while typ...
An efficient analytical method for the preconcentration and determination of phosphate in water samples at trace levels was proposed. The method was based on sample enrichment using dispersive solid-phase extraction (dSPE) with tetraethylenepentamine (TEPA)-functionalized nano-size composite materials (TEPA-NCMs) as sorbents, which were fully characterized. Various parameters affecting the ex...
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