Health & Environmental Research Online (HERO)


tert-Amyl ethyl ether (TAEE)


74 References Were Found:

Journal Article
Journal Article

Catalytic activity dependence on morphological properties of acidic ion-exchange resins for the simultaneous ETBE and TAEE liquid-phase synthesis

Authors: Soto, R; Fite, C; Ramirez, E; Iborra, M; Tejero, J (2018) HERO ID: 4641882

[Less] The simultaneous liquid-phase synthesis of 2-ethoxy-2-methylpropane (ETBE) and 2-ethoxy-2-methylbutane . . . [More] The simultaneous liquid-phase synthesis of 2-ethoxy-2-methylpropane (ETBE) and 2-ethoxy-2-methylbutane (TAEE) has been studied over fifteen commercial acidic ion-exchange resins. Kinetic experiments were carried out in a batch reactor at T = 335 K and initial molar ratios of alcohol to olefins (R degrees(A/O)) and between olefins (R degrees(C4/C5)) of 1.1 and 1, respectively. The catalytic activity, measured as intrinsic initial etherification rates, has been found to decrease in the order: Amberlyst (TM) 35 > Amberlyst (TM) 48 > Purolite (R) CT-275 > Amberlyst (TM) 15 > Purolite (R) CT-175 > Amberlyst (TM) 40 > Amberlyst (TM) 36 > Amberlyst (TM) 16 > Purolite (R) CT-482 > Amberlyst (TM) 39 > Amberlyst (TM) DT > Amberlyst (TM) 45 > Purolite (R) CT-124 > Purolite (R) MN-500 > Amberlyst T 46. This catalytic activity rank is related to the morphological properties of the resins in both dry and swollen states. The ratio of acid capacity to specific volume of the swollen polymer has been found to be the main catalyst properties that determine their activity: the higher the ratio, the higher the activity.

The "refereed" or "peer review" status of a journal comes from the Ulrichsweb Global Serials Directory (http://ulrichsweb.serialssolutions.com/), as supplied by the publisher. The term refers to the system of critical evaluation of manuscripts/articles by professional colleagues or peers. The content of refereed publications is sanctioned, vetted, or otherwise approved by a peer-review or editorial board. The peer-review and evaluation system is utilized to protect, maintain, and raise the quality of scholarly material published in serials. Publications subject to the referee process are assumed, then, to contain higher quality content than those that are not.
Peer Reviewed Journal Article

Kinetic modeling of the simultaneous etherification of ethanol with C-4 and C-5 olefins over Amberlyst (TM) 35 using model averaging

Authors: Soto, R; Fite, C; Ramirez, E; Bringue, R; Cunill, F (2017) HERO ID: 3986415

[Less] A kinetic study on the simultaneous liquid-phase etherification of ethanol with isobutene (IB), 2-methyl-1-butene . . . [More] A kinetic study on the simultaneous liquid-phase etherification of ethanol with isobutene (IB), 2-methyl-1-butene (2M1B) and 2-methyl-2-butene (2M2B) catalyzed by Amberlysf (TM) 35 to form ethyl tert-butyl ether (ETBE) and tert-amyl ethyl ether (TAEE) is presented. Isothermal experimental runs were carried out in a stirred tank batch reactor in the temperature range 323-353 K at 2.0 MPa, starting from different initial concentrations. Obtained reaction rates were free of catalyst load, internal, and external mass transfer effects. Mathematical fitting of a series of systematically originated models, model selection, and model averaging procedures were applied to find the best model and to draw conclusions about the reaction mechanism. The selected model involves a saturated catalytic surface with the participation of two active sites in etherification reactions and one active site in isoamylenes isomerization. Apparent activation energies for ETBE formation from IB and EtOH, TAEE formation from 2M1B and EtOH, TAEE formation from 2M2B and EtOH, and double bond isomerization between 2M1B and 2M2B were 72.8 +/- 1.4, 74.9 +/- 2.8, 81.2 +/- 2.2 and, 76.5 +/- 7.2 kJ/mol, respectively. The alkenes with the double bond in terminal position were more reactive towards EtOH than 2M2B, with the double bond in internal position. (C) 2016 Elsevier B.V. All rights reserved.

The "refereed" or "peer review" status of a journal comes from the Ulrichsweb Global Serials Directory (http://ulrichsweb.serialssolutions.com/), as supplied by the publisher. The term refers to the system of critical evaluation of manuscripts/articles by professional colleagues or peers. The content of refereed publications is sanctioned, vetted, or otherwise approved by a peer-review or editorial board. The peer-review and evaluation system is utilized to protect, maintain, and raise the quality of scholarly material published in serials. Publications subject to the referee process are assumed, then, to contain higher quality content than those that are not.
Peer Reviewed Journal Article

Equilibrium conversion, selectivity and yield optimization of the simultaneous liquid-phase etherification of isobutene and isoamylenes with ethanol over Amberlyst (TM) 35

Authors: Soto, R; Fite, C; Ramirez, E; Bringue, R; Cunill, F (2016) HERO ID: 4641888

[Less] A prospective study on the product distribution at chemical equilibrium for the simultaneous liquid-phase . . . [More] A prospective study on the product distribution at chemical equilibrium for the simultaneous liquid-phase etherification of isobutene and isoamylenes with ethanol over Amberlyst (TM) 35 is presented. Experiments were performed isothermally in a 200 cm(3) stirred tank batch reactor operating at 2.0 MPa. Initial molar ratios of alcohol/olefins and isobutene/isoamylenes ranged both from 05 to 2, and temperature from 323 to 353 K. Reactants equilibrium conversion, selectivities and yields toward products were clearly affected by the experimental conditions. Experimental etherification yields have been modeled using the response surface methodology (RSM), combined with the stepwise regression method to include only the statistically significant variables into the model. The multiobjective optimization (MOO) of etherification yields has been carried out numerically, by means of the desirability function approach, and graphically, by using the overlaid contour plots (OCP). Optimal conditions for the simultaneous production of ethyl tert-butyl ether (ETBE) and tert-amyl ethyl ether (TAEE) have been found to be at low temperatures (323 to 337 K) and initial molar ratio alcohol/olefins close to 0.9 and isobutene/isoamylenes close to 0.5. (C) 2015 Elsevier B.V. All rights reserved.

The "refereed" or "peer review" status of a journal comes from the Ulrichsweb Global Serials Directory (http://ulrichsweb.serialssolutions.com/), as supplied by the publisher. The term refers to the system of critical evaluation of manuscripts/articles by professional colleagues or peers. The content of refereed publications is sanctioned, vetted, or otherwise approved by a peer-review or editorial board. The peer-review and evaluation system is utilized to protect, maintain, and raise the quality of scholarly material published in serials. Publications subject to the referee process are assumed, then, to contain higher quality content than those that are not.
Peer Reviewed Journal Article

TAEE Sustainable Process Design and Simulation

Authors: Perederic, OA; Plesu, V; Iancu, P; Bonet-Ruiz, AE; Bonet-Ruiz, J; Muchan, B (2016) HERO ID: 4641885

[Less] Sustainable process design for TAEE synthesis process is performed by comparing three case studies (CS1, . . . [More] Sustainable process design for TAEE synthesis process is performed by comparing three case studies (CS1, CS2 and CS3) based on two PFDs with different separation section (classical water-ethanol extraction method and pressure swing distillation) and different recycle streams. Heat integration (HI) of distillation columns is considered for two of the case studies. Feedstock for TAEE production process is represented by Light Cycle Naphtha enriched in 2-methyl-1-butene and 2-methyl-2-butene. Results point out that best performance is achieved for CS2 (pressure swing distillation and EtOH recycle): no danger to contaminate gasoline with water, EtOH recovery, and better energy performance.

The "refereed" or "peer review" status of a journal comes from the Ulrichsweb Global Serials Directory (http://ulrichsweb.serialssolutions.com/), as supplied by the publisher. The term refers to the system of critical evaluation of manuscripts/articles by professional colleagues or peers. The content of refereed publications is sanctioned, vetted, or otherwise approved by a peer-review or editorial board. The peer-review and evaluation system is utilized to protect, maintain, and raise the quality of scholarly material published in serials. Publications subject to the referee process are assumed, then, to contain higher quality content than those that are not.
Peer Reviewed Journal Article

Novel process integration for biodiesel blend in membrane reactive divided wall (MRDW) column

Authors: Sakhre, V; Jain, S; Sapkal, VS; Agarwal, DevP (2016) HERO ID: 4641880

[Less] The paper proposes a novel process integration for biodiesel blend in the Membrane assisted Reactive . . . [More] The paper proposes a novel process integration for biodiesel blend in the Membrane assisted Reactive Divided Wall Distillation (MRDW) column. Biodiesel is a green fuel and grade of biodiesel blend is B20 (%) which consist of 20% biodiesel and rest 80% commercial diesel. Instead of commercial diesel, Tertiary Amyl Ethyl Ether (TAEE) was used as an environment friendly fuel for blending biodiesel. Biodiesel and TAEE were synthesized in a pilot scale reactive distillation column. Dual reactive distillation and MRDW were simulated using aspen plus. B20 (%) limit calculation was performed using feed flow rates of both TAEE and biodiesel. MRDW was compared with dual reactive distillation column and it was observed that MRDW is comparatively cost effective and suitable in terms of improved heat integration and flow pattern.

Journal Article
Journal Article

TAEE 1994-2014: Electronics teaching throughout 21 years

Authors: Blazquez, M; Aguilar Pena, JD; Castro, M; Quintans Grana, C; Arriaga, J; Pescador, F; Asuncion Morales, Ma; IEEE (2016) HERO ID: 4641802

[Less] TAEE conferences, which was begun in 1996 edition, has provided a great amount of technical and educational . . . [More] TAEE conferences, which was begun in 1996 edition, has provided a great amount of technical and educational papers. After 11 editions and 22 years of existence, it can be said that, TAEE conferences and the Association responsible of their organization is more than a meeting about Electronics Education among teachers, professors, technicians, engineers and researchers every 2 years.

It is a living community sharing and providing much of what is taught in Spain and transmitted in the field of Electronics. Throughout all this time, TAEE conferences have become a reference for many people. Following the work "Semiautomatic Creation of educational objects and TAEE meta-analysis", carried out in 2008, documentation generated in TAEE has been homogenized, resulting in the current unified structure of objects contained in all TAEE papers, available and free access through the digital platform eSpacio-UNED.

The "refereed" or "peer review" status of a journal comes from the Ulrichsweb Global Serials Directory (http://ulrichsweb.serialssolutions.com/), as supplied by the publisher. The term refers to the system of critical evaluation of manuscripts/articles by professional colleagues or peers. The content of refereed publications is sanctioned, vetted, or otherwise approved by a peer-review or editorial board. The peer-review and evaluation system is utilized to protect, maintain, and raise the quality of scholarly material published in serials. Publications subject to the referee process are assumed, then, to contain higher quality content than those that are not.
Peer Reviewed Journal Article

Anti-obesity effect of Triticum aestivum sprout extract in high-fat-diet-induced obese mice

Authors: Im, JY; Ki, HH; Xin, M; Kwon, SU; Kim, YH; Kim, DK; Hong, SP; Jin, JS; Lee, YM (2015) Bioscience, Biotechnology, and Biochemistry 79:1133-1140. HERO ID: 4641604

[Less] Obesity is a common disease worldwide that often results in serious conditions including hypertension, . . . [More] Obesity is a common disease worldwide that often results in serious conditions including hypertension, diabetes, and hyperlipidemia. Many herbal medicines have been examined with regard to ameliorating obesity. We investigated the anti-obesity effects of 50% EtOH extract of Triticum aestivum sprout (TAEE) in high-fat-diet (HFD)-induced obese mice. TAEE administration (10, 50, or 200 mg/kg) for 6 weeks significantly decreased the body weights, serum total cholesterol (TC), and low-density lipoprotein cholesterol levels in HFD-fed mice. TAEE treatment reduced lipid accumulation in epididymal white adipose tissue (EWAT) and liver. Moreover, TC and lipid levels were decreased by TAEE treatment in liver. Serum leptin and adiponectin concentrations were reduced by TAEE treatment. TAEE-treated mice showed decreases in peroxisome proliferator-activated receptor γ (PPARγ) and fatty acid synthase expression in EWAT. Furthermore, TAEE administration elevated levels of PPARα protein in the liver of HFD-induced obese mice. These results suggest that TAEE supplementation might be beneficial for the treatment and prevention of obesity and related diseases.

The "refereed" or "peer review" status of a journal comes from the Ulrichsweb Global Serials Directory (http://ulrichsweb.serialssolutions.com/), as supplied by the publisher. The term refers to the system of critical evaluation of manuscripts/articles by professional colleagues or peers. The content of refereed publications is sanctioned, vetted, or otherwise approved by a peer-review or editorial board. The peer-review and evaluation system is utilized to protect, maintain, and raise the quality of scholarly material published in serials. Publications subject to the referee process are assumed, then, to contain higher quality content than those that are not.
Peer Reviewed Journal Article

Effect of water addition on the simultaneous liquid-phase etherification of isobutene and isoamylenes with ethanol over amberlyst (TM) 35

Authors: Soto, R; Fite, C; Ramirez, E; Tejero, J; Cunill, F (2015) HERO ID: 4641884

[Less] The simultaneous liquid-phase etherification of isobutene and isoamylenes with ethanol has been carried . . . [More] The simultaneous liquid-phase etherification of isobutene and isoamylenes with ethanol has been carried out at 353 K over Amberlyst (TM) 35. The initial molar ratios of alcohol/olefins and isobutene/isoamylenes were both maintained constant at 0.5 and 1, respectively. The effect of water presence on the reaction system has been studied by the addition of water to the initial reactant mixture, ranging from 0 to 1 wt.%. Under experimental conditions, product distribution, as well as etherification reaction rates, have been clearly affected by the addition of water. Water favors the formation of tertiary alcohols through olefins hydration because of its preferential adsorption on the active sites, while it hinders etherification and dimerization reactions. The inhibitory effect of water was more noticeable on dimerization than on etherification. Based on specific theories about the dissociation of the active sites from the catalytic network, the amount of water required to dissociate all the sulfonic groups has been estimated. Finally, the feasibility of the bioethanol use as a reactant has also been evaluated. (C) 2015 Elsevier B.V. All rights reserved.

The "refereed" or "peer review" status of a journal comes from the Ulrichsweb Global Serials Directory (http://ulrichsweb.serialssolutions.com/), as supplied by the publisher. The term refers to the system of critical evaluation of manuscripts/articles by professional colleagues or peers. The content of refereed publications is sanctioned, vetted, or otherwise approved by a peer-review or editorial board. The peer-review and evaluation system is utilized to protect, maintain, and raise the quality of scholarly material published in serials. Publications subject to the referee process are assumed, then, to contain higher quality content than those that are not.
Peer Reviewed Journal Article

Synthesis of tert-amyl ethyl ether for gasoline additive

Authors: Lei, Z; Zhang, H; Liu, JJun; Yang, BoLun (2015) HERO ID: 4641850

[Less] A series of experiments were carried out in a batch reactor at the temperature range of 313-343 K to . . . [More] A series of experiments were carried out in a batch reactor at the temperature range of 313-343 K to study the synthesis of tert-amyl ethyl ether from ethanol (EtOH) and 2-methyl-1-butene (2M1B) catalyzed by the NKC-9 ion-exchange resin. The suitable reaction pressure was obtained by using the method of the Gibbs free energy minimization. The activity coefficients of each component were accurately calculated using the Wilson method, then, the equilibrium constants was obtained. The effect of catalyst size, stirring rate, temperature and EtOH/2M1B molar ratio was investigated at the chosen pressure, respectively. A kinetic model which considered the variation of each component volume was established. The method of nonlinear least square combined with genetic algorithm (NLS-GA) was proposed to estimate the kinetic constant in the forward direction. Results indicated that simulated kinetics results were agreed well with the experimental data. (C) 2015 The Authors. Published by Elsevier Ltd.

The "refereed" or "peer review" status of a journal comes from the Ulrichsweb Global Serials Directory (http://ulrichsweb.serialssolutions.com/), as supplied by the publisher. The term refers to the system of critical evaluation of manuscripts/articles by professional colleagues or peers. The content of refereed publications is sanctioned, vetted, or otherwise approved by a peer-review or editorial board. The peer-review and evaluation system is utilized to protect, maintain, and raise the quality of scholarly material published in serials. Publications subject to the referee process are assumed, then, to contain higher quality content than those that are not.
Peer Reviewed Journal Article

Low resting metabolic rate is associated with greater lifespan because of a confounding effect of body fatness

Authors: Duarte, LC; Speakman, JR (2014) Age 36:9731. HERO ID: 4641542

[Less] A negative association between resting metabolic rate (RMR) and lifespan is the cornerstone of the rate . . . [More] A negative association between resting metabolic rate (RMR) and lifespan is the cornerstone of the rate of living and free-radical damage theories of aging. Empirical studies supporting a negative association of RMR to lifespan may arise from the correlation between RMR and both daily energy expenditure (DEE) and thermoregulatory activity energy expenditure (TAEE). We screened 540 female mice for higher and lower DEE and measured RMR in the resulting 324 (60 %). We then selected 92 mice in which there was no link between residual from the regression of RMR against body mass (BM) and residual of DEE against BM to separate the effects of these traits. Lifespan was not significantly related to body mass, DEE and TAEE, but significantly negatively related to RMR. Fat-free mass (FFM) and fat mass (FM) were both significantly positively related to RMR. After removing the effect of FFM on RMR, the association between RMR and lifespan remained significantly negative; however, after statistically removing the effect of FM on RMR, the significant association between RMR and lifespan disappeared. We conclude that the negative association between RMR and lifespan is primarily due to the effect of FM, with FM positively related to both RMR and mortality and hence RMR negatively to lifespan. In 40 additional screened mice, greater FM was also associated with greater oxidative damage to DNA.