Browsing by Author "Khettab, N."

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Purification des eaux usées de l’industrie textile polluée par ‎des colorants organiques synthétiques à l’aide des déchets ‎industriels et des mélanges matériaux locaux
(Aljest, 2015) Nabiev, M.; Kaddour, O.; Nabieva, A.M.; Khettab, N.; Gater, SN.
L’industrie textile utilise des colorants de synthèse toxiques qui polluent ses eaux résiduaires ; tels que les colorants acides, neutres et basiques. Le but de cette recherche entre dans le cadre du choix d’un adsorbant efficace, local et bon marché pour éliminer des colorants des eaux résiduaires de l’industrie textile. L’objectif de ce travail consiste à exploiter les déchets industriels tels que les déchets obtenus lors de la régénération des résines d’échangeuses d’ions formés des liquides aqueux très salés par les sels de calcium et de magnésium ; ainsi que l’eau de mer ou océan. Analyse des déchets industriels obtenus et l’eau de mer montré que un litre de liquide salé peut donner (au pH 11 que ~20g d’un mélange de Mg(OH)2 et de (MgOH)2CO3 et ~ 30 g/l de CaCO3 ; un litre de l’eau de mer peuvent formés plus que ~ 4g d’un mélange de Mg(OH)2 et de (MgOH)2CO3 et ~ 1 g/l de CaCO3. Le traitement que nous proposons est efficace et bon marché (en qualité d’adsorbant est le mélange obtenus de déchets industriels et de bentonite locale).En effet ; l’adsorbant mis au point fixe les polluants en diminuant la DBO5 et DCO. Cette diminution est de l’ordre de 95%. Les résultats obtenus sont très probant et les valeurs des paramètres DBO5 et DCO sont fortement inférieures aux normes
Synthesis of Amino-Esters used as additives for oil engines
(EuroJournals, 2008) Gherbi, A.; Kaddour, O.; Khettab, N.
In these recent years, there is a large application of dispersant additives using an alkyl group based on different oligomers. As additives, we generally use succinimides. A series of amido-esters as polyfontional additives for lubricating oils have been synthesized in our laboratories. They enhance dispersive, detergency, antioxidant, anticorrosive, antiwear properties and thermal stability. The raw materials are an oligomer obtained by thermal cracking under vacuum of polyethylene waste from the petrochemical complex of Skikda (Algeria). The synthesised products have been identified by physicals and chemicals methods. They have undergone much exploitation tests. The results show that these compounds can be used as polyfonctional additives for engine oils at low and high temperature
Synthesis of metallorganics as polyfunctional additives for engine oils
(2008) Kaddour, O.; Boukherissa, A.; Khettab, N.
It is known that metallo-organics as additives to engine oils such as the alkylsulphates, the dialkylphenyldithiophosphates etc.. have some inconveniences that appear during the lubrication and particularly in the case where the oil is used under severe conditions, this can cause its decomposition as ashes leading to eventual engine wear. The specifications of new engines, working under severe conditions constitute an imperative of the synthesis of additives with high thermal and oxidative stabilities, longer lubrication life, universal application and a lower consumption of the additives. Today's engines requirements on lubrication oils with more and more performance have attracted our interest to synthesize a series of metallo-organic products used as polyfunctional additives for engine oils. Their synthesis is carried out following three steps namely: alkenylation, amidation and esterification of alkenylmaleic anhydride, and finally neutralization. The different metals used are Ca, Mg, Ba, Cu, Zn, Hg. The synthesized products have been identified using physical and chemical analysis methods, and their use as additives for engine oils confirmed through exploitation testing. This permitted to propose them as polyfunctional additives for lubricating oils