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Journal ArticleDOI

Alkylation of benzene with straight-chain olefins in the presence of sulfuric acid as a catalyst

31 Mar 1972-Journal of Chemical Engineering of Japan (The Society of Chemical Engineers, Japan)-Vol. 5, Iss: 1, pp 34-39
TL;DR: Alkylation of benzene with straight-chain olefins (from hexene to decene) in the presence of strong sulfuric acid was studied at a carefully controlled low temperature as discussed by the authors.
Abstract: Alkylation of benzene with straight-chain olefins (from hexene to decene) in the presence of strong sulfuric acid was studiedat a carefully controlled low temperature. The rate determinations were carried out under the condition of complete elimination of masstransfar resistance. The reaction was found to occur by a homogeneous mechanism in acid phase alone, and reasonable correlation of reaction rates with sulfuric acid strength and reactant concentrations was also obtained. In addition to the carbonium ion mechanism, all the isomeric ions were found to have equal stabilities when they attained the equilibrium distribution before the attack on benzene.
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TL;DR: A sensitivity analysis has been carried out to investigate the influence of the external mass transfer coefficient (film resistance), the effective diffusion coefficient (pore diffusion) and the solid phase loading capacity on the sorption of copper and cadmium ions onto bone char in single component systems.

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Journal ArticleDOI
TL;DR: In this paper, the Sips isotherm equation was found to give the most accurate correlation of the equilibrium relationship between these metal ions and bone char, and the equilibrium adsorption capacities of bone char for copper, zinc and cadmium ion were determined to be approximately 0.80, 0.50, and 0.55 mmol/g, respectively.
Abstract: The ability for the sorption of the three metals onto bone char was demonstrated by a series of equilibrium isotherm studies. The Sips isotherm equation was found to give the most accurate correlation of the equilibrium relationship between these metal ions and bone char, and the equilibrium adsorption capacities of bone char for copper, zinc, and cadmium ion were determined to be approximately 0.80, 0.50, and 0.55 mmol/g, respectively. A film surface diffusion model, which is based on the assumption that the sorbate penetration rate is controlled by the external film diffusion and surface diffusion within the sorbent, has been developed to simulate the fixed bed sorption of copper, zinc, and cadmium ions onto bone char. A computer program based on a numerical solution using the finite difference method has been constructed and successfully simulated the metal ion−bone char column behavior. A new external mass transfer correlation was proposed and applied in the model. The effect of axial dispersion was t...

57 citations

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TL;DR: In this paper, the feasibility of using microwave irradiated Aegle marmelos Correa fruit shell was investigated in a fixed-bed column towards sorptive removal of Atrazine from aqueous solutions.

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TL;DR: In this article, the optimal design and operation of adsorption columns for the removal of cadmium and nickel from synthetic aqueous solutions, both in single-compound and binary systems, were investigated.

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TL;DR: In this article, the effects of process parameters in the following range: pH 2-12, temperature 293-313 K, contact time 1-5h and initial concentration 200-600mg·L−1.

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