699-12-7Relevant articles and documents
A novel CuO NPs/AgZSM-5 zeolite composite adsorbent: Synthesis, identification and its application for the removal of sulfur mustard agent simulant
Sadeghi, Meysam,Yekta, Sina,Mirzaei, Daryoush
, p. 995 - 1005 (2018)
In this investigation, the parent NaZSM-5 zeolite has been successfully fabricated by the hydrothermal route and then to enhance the catalytic performance of this zeolite, silver ions (Ag+) and copper oxide nanoparticles (CuO NPs) were loaded in its structure through the ion exchange and impregnation methods to attain the novel CuO NPs/AgZSM-5 zeolite composite adsorbent. The parent and modified samples were comprehensively analyzed and identified by using the FESEM-EDX, TEM, XRD, and FTIR techniques. This is the first time that the CuO NPs/AgZSM-5 (containing 3.4 wt% Ag and 12.6 wt% CuO) has been utilized for the removal (adsorption and degradation) of 2-chloroethyl phenyl sulfide (2-CEPS) as a toxic sulfur mustard agent simulate, and its applicability was proved according to the GC-FID, GC-MS, and FTIR results. Moreover, the consequences of several experimental factors such as contact time, initial concentration, adsorbent dose, and adsorbent type on the removal efficiency of 2-CEPS were also surveyed. The GC-FID analysis data confirmed that the maximum removal yield of 2-CEPS was 100%. Besides, the parameters of contact time (120 min), initial concentration (25 mg/L), and adsorbent dose (0.3 g) were perused and optimized for the subsequent reaction. The reaction kinetic status was also studied employing first order model. The quantities of the half-life (t1/2) and rate constant (k) were indicated as 26.25 min and 0.0264 min?1, respectively. The product obtained from the degradation and hydrolysis reaction between the 2-CEPS and CuO NPs/AgZSM-5 was 2-hydroxy ethyl phenyl sulfide (2-HEPS) which is substantially less toxic than original pesticide.
A NaX zeolite framework containing magnetic MgFe2O4/CdO nanoparticles: Synthesis, characterization and catalytic performance in the decontamination of 2-chloroethyl phenyl sulfide (2-CEPS) as a model of sulfur mustard agent
Farhadi, Saeed,Sadeghi, Meysam,Zabardasti, Abedin
supporting information, p. 21315 - 21326 (2021/12/04)
The present study highlights the successful fabrication of a zeolite NaX/MgFe2O4/CdO magnetically separable nanocomposite catalyst via an ultrasonic-assisted hydrothermal strategy for the decontamination of sulfur mustard agent simulant 2-chloroethyl phenyl sulfide (2-CEPS) for the first time. The as-fabricated nanocomposite was fully characterized using FESEM, TEM, EDAX, FTIR spectroscopy, XRD, AFM, VSM, N2-BET, and ICP-AES analyses. The decontamination process of 2-CEPS was monitored via GC-FID analysis. Furthermore, the effects of different analytical parameters such as contact time, catalyst type, catalyst amount and solvent type on the decontamination efficiency of 2-CEPS were precisely investigated. By using 50 mg of NaX/MgFe2O4/CdO catalyst in the presence of an n-heptane non-polar solvent, a decontamination efficiency of 100% was achieved after a contact time of 120 min. The decontamination process rate was verified by a first-order kinetic model. The obtained outcomes demonstrated that the apparent rate constant (kapp) and half-life time (t1/2) were 0.219 min-1 and 31.64 min, respectively. Lastly, the presence of hydrolysis and elimination products, namely 2-hydroxy ethyl phenyl sulfide (2-HEPS) and phenyl vinyl sulfide (PVS), from the effective degradation of 2-CEPS over the NaX/MgFe2O4/CdO catalyst was confirmed, and GC-MS analysis was performed to identify the degradation products of this agent simulant. This illustrates that the NaX/MgFe2O4/CdO catalyst could potentially be utilized for the removal of hazardous chemical warfare agents. This journal is
Method for synthesizing 2-thiophenyl ethanol through continuous liquid-solid phase catalysis reaction
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Paragraph 0022-0041, (2019/02/26)
The invention discloses a method for synthesizing 2-thiophenyl ethanol through a continuous liquid-solid phase catalysis reaction and relates to the technical field of organic vulcanization. Accordingto the method, inorganic porous material loaded alkali metal salt is adopted as a catalyst; at normal pressure, when the temperature is 120 DEG C, the volume air speed of a mixed solution of ethylenecarbonate and thiophenol is 0.75-1.5 h, the thiophenol conversion rate is 99.9%, and the 2-thiophenyl ethanol selectivity is 99.9%, the catalyst is enabled to be continuously operated for 168 hours, wherein the thiophenol conversion rate and the selectivity of the 2-thiophenyl ethanol are both 99% or greater than 99%; a product is subjected to vacuum distillation, and a trace amount of unconverted thiophenol and ethylene carbonate are removed through alkali absorption to obtain a 2-thiophenyl ethanol product of which the purity is greater than 99%.
