Evaluation of an improved epichlorohydrin synthesis from dichloropropanol using a microchemical system

Lü, Yangcheng; Wang, Rui; Zhang, Jisong; Jin, Qianru; Luo, Guangsheng

doi:10.1016/j.cjche.2014.10.021

Cited by 12 publications

(10 citation statements)

References 21 publications

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“…Drawbacks to this published method include that the functionalization procedures were chemically detrimental to cellulose, the indicator (1-naphthylamine) is carcinogenic, and that the sub-micromolar detection was only achieved via absorbance spectroscopy or by treating the paper repeatedly with the sample solution. A more favorable approach for the immobilization of N -(1-naphthyl)ethylenediamine is the use of the linker epichlorohydrin, which has been reported in the grafting of small molecules and macrocycles , to cellulose, typically using aqueous sodium hydroxide conditions. , However, under these conditions, epichlorohydrin is known to undergo hydrolysis − or form other unfavorable side products due to the presence of a strongly nucleophilic base and a nucleophilic solvent, which limits the efficacy of functionalization. Additionally, N -(1-naphthyl)ethylenediamine is moisture sensitive and poorly water-soluble.…”

Section: Resultsmentioning

confidence: 99%

Ultrasensitive Detection of Nitrite through Implementation ofN-(1-Naphthyl)ethylenediamine-Grafted Cellulose into a Paper-Based Device

2020

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Reported herein is the immobilization of N-(1naphthyl)ethylenediamine (NED) on cellulose via an epichlorohydrin (ECH)-based covalent attachment and the implementation of the functionalized cellulose into an ultrasensitive, paper-based device for nitrite detection. The reported functionalization procedure resulted in a 12.9-fold higher functionalization density than the density that results from the previously reported procedures, and the subsequent device allows for nitrite detection limits in synthetic freshwater and real seawater of 0.26 and 0.22 μM, respectively. The sensor is efficient in a wide range of temperature, humidity, turbidity, and salinity conditions and has been successfully applied for nitrite detection in real water samples.

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Section: Resultsmentioning

confidence: 99%

Ultrasensitive Detection of Nitrite through Implementation ofN-(1-Naphthyl)ethylenediamine-Grafted Cellulose into a Paper-Based Device

2020

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“…This causes not only the corrosion of the reaction equipment but also generates a large amount of by‐products and waste liquid. Besides, there are many problems with refining the main products and separating the catalysts from the reaction mixture . Compared with homogeneous catalysis, solid catalysis enables easier product separation, hence avoiding the production of large volumes of wastewater and increasing the cost efficiency, using less labor materials and financial resources …”

Section: Introductionmentioning

confidence: 99%

“…Besides, there are many problems with refining the main products and separating the catalysts from the reaction mixture. [8][9][10] Compared with homogeneous catalysis, solid catalysis enables easier product separation, hence avoiding the production of large volumes of wastewater and increasing the cost efficiency, using less labor materials and financial resources. [11][12][13][14] A solid base is a substance that can donate electron pairs or accept protons.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of epichlorohydrin from 1,3‐dichlorohydrin with solid catalysts using γ‐Al₂O₃ as carrier material

Zhang

Yang

et al. 2020

Asia-Pacific J Chem Eng

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Alkaline earth metal‐based catalysts applied in the process of dichlorohydrin cyclization into epichlorohydrin were studied. A series of solid catalysts were prepared by the equivalent‐volume impregnation method using γ‐Al2O3 as a carrier, whereas nitrates and chlorides of the three alkaline earth metals (Mg, Ca, and Ba) were employed as precursors. Their catalytic performance was investigated and compared, taking into account the main factors influencing the catalytic efficiency, such as X‐ray diffraction (XRD), N2 adsorption–desorption, energy dispersive spectrometry (EDS) coupled with TEM, and CO2 temperature‐programmed desorption (CO2‐TPD). The results have shown that the specific surface area and the number of active base sites are the main factors that are affecting the catalytic efficiency. Among the series of as‐prepared catalysts, 10BaO/γ‐Al2O3 had improved catalytic performance. Based on the obtained results for the characterization of catalysts, the increased catalytic activity could be mainly attributed to the increase in base strength resulting from BaO loading onto the surface of γ‐Al2O3. Under optimized conditions, 98.4% conversion of 1,3‐DCH and approximately 90% of ECH selectivity were achieved using 10BaO/γ‐Al2O3 with a reaction temperature of 270°C. During the reaction process, the catalytic activity of 10BaO/γ‐Al2O3 remained consistently high, and its catalytic stability was excellent.

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“…As an important chemical precursor and fine chemical product, epichlorohydrin (ECH) is used to synthesize epoxy resins, chlorohydrins rubber, pesticides, and plasticizers . Some current industrial processes to prepare ECH include propylene chlorination, propylene acetate chlorination, and glycerol chlorination .…”

Section: Introductionmentioning

confidence: 99%

Preparation, characterization, and catalytic behavior of xMO/yNaZSM‐5 catalyst for dichlorohydrin dechlorination reaction

Liang

Yang

et al. 2018

Asia-Pacific J Chem Eng

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A series of loaded CaO or MgO catalysts with NaZSM-5 zeolites as supports were prepared by incipient wetness impregnation and used to catalyze the dechlorination of dichlorohydrin (DCH) to epichlorophydrin (ECH). The resulting prepared catalysts were characterized by X-ray diffraction, N 2 adsorption-desorption, CO 2 temperature-programmed desorption, and the Hammett indicator method. The reaction results demonstrated that the MgO/ NaZSM-5 catalyst exhibited better catalytic performance compared with the CaO/NaZSM-5. In addition, the effect of different MgO loadings on the activities of as-synthesized catalysts was investigated. Notable, the activity of MgO/ NaZSM-5 catalyst increased with the increased loading content of MgO. Based on the obtained characterization for the xMO/yNaZSM-5 catalysts, the increased catalytic activity could be attributed to both the increase of Brunauer-Emmett-Teller values and the increase in base strength resulting from MgO loading onto the NaZSM-5 zeolite. In addition, the calcination temperature of the sample was also an important factor for the DCH dechlorination reaction. Under optimized conditions, 99.8% conversion of 1,3-DCH and 95.5% yield of ECH were achieved using 10MgO/80NaZSM-5 zeolite calcined at 550°C under atmospheric pressure, a reaction temperature of 330°C, weight hourly space velocity of DCH 1.06 hr −1 , a nitrogen feed flow rate of 100 ml/ min and a DCH saturator temperature of 80°C.

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Evaluation of an improved epichlorohydrin synthesis from dichloropropanol using a microchemical system

Cited by 12 publications

References 21 publications

Ultrasensitive Detection of Nitrite through Implementation ofN-(1-Naphthyl)ethylenediamine-Grafted Cellulose into a Paper-Based Device

Ultrasensitive Detection of Nitrite through Implementation ofN-(1-Naphthyl)ethylenediamine-Grafted Cellulose into a Paper-Based Device

Synthesis of epichlorohydrin from 1,3‐dichlorohydrin with solid catalysts using γ‐Al₂O₃ as carrier material

Preparation, characterization, and catalytic behavior of xMO/yNaZSM‐5 catalyst for dichlorohydrin dechlorination reaction

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Evaluation of an improved epichlorohydrin synthesis from dichloropropanol using a microchemical system

Cited by 12 publications

References 21 publications

Ultrasensitive Detection of Nitrite through Implementation ofN-(1-Naphthyl)ethylenediamine-Grafted Cellulose into a Paper-Based Device

Ultrasensitive Detection of Nitrite through Implementation ofN-(1-Naphthyl)ethylenediamine-Grafted Cellulose into a Paper-Based Device

Synthesis of epichlorohydrin from 1,3‐dichlorohydrin with solid catalysts using γ‐Al2O3 as carrier material

Preparation, characterization, and catalytic behavior of xMO/yNaZSM‐5 catalyst for dichlorohydrin dechlorination reaction

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Synthesis of epichlorohydrin from 1,3‐dichlorohydrin with solid catalysts using γ‐Al₂O₃ as carrier material