Cyclohexanone ammoximation
WebApr 10, 2024 · Especially, cyclohexanone oxime (CHO) is the key intermediate for the production of ε-caprolactam, a monomer for the nylon-6 and plastics [3], [4]. Current industrial methods for CHO production mainly include “cyclohexanone-hydroxylamine”[5], “cyclohexanone-ammoximation” [6] and “cyxlohexane-photonitrosation” [7]. WebUrchin-like Nb 2 O 5 nanostructures have been used for the first time as a novel catalyst instead of conventional titanosilicate in the liquid-phase ammoximation of cyclohexanone. The as-prepared urchin-like Nb 2 O 5 nanostructures exhibit high catalytic activity in cyclohexanone ammoximation.
Cyclohexanone ammoximation
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WebDec 31, 2004 · An intrinsic kinetic of the cyclohexanone ammoximation in the liquid phase over titanium silicate molecular sieves is investigated in an isothermal slurry reactor at different initial reactant... WebWu Jing is an academic researcher from East China Normal University. The author has contributed to research in topic(s): Catalysis & Acetaldehyde. The author has an hindex of 3, co-authored 5 publication(s) receiving 54 citation(s).
WebMay 5, 2024 · Ammoximation reaction conditions: Cyclohexanone (20 wt %): NH 3 (26 wt %) (1: 0.5), 3.6% H 2, 6.4% O 2, 90% N 2 (580 psi, 20 ml min −1), catalyst (0.41 g), …
WebAbstract Influence of metal ions on hydrogen peroxide decomposition on the liquid-phase ammoximation of cyclohexanone was studied in homogeneous and heterogeneous … WebAug 1, 2002 · This mechanism is supported by the reported observation that ketones such as 4-tert-butylcyclohexanone can participate in the ammoximation reaction, although the bulky radical should prevent...
WebThe ammoximation of cyclohexanone to cyclohexanone oxime is a key process in the production of Nylon-6, with annual global production of the polyamide predicted to reach 8.9 million tons by 2024, a concurrent increase in the demand for cyclohexanone oxime is likewise expected. 1 The application of the titanosilicate TS-1, first developed by ...
Web14.Application and optimization of membrane separation system in cyclohexanone ammoximation unit氨肟化装置膜分离系统的应用和优化 15.The reformation and strategies put forward for the synthetic ammonia system合成氨造气工段水系统改造效果分析 taichung city xitun districtWebAug 24, 2016 · Cyclohexanone oxime, produced by cyclohexanone ammoximation, is one of the most important chemical intermediates to produce ε-caprolactam via a Beckmann intramolecular rearrangement [ 52 – 54 ]. ε-caprolactam is widely used to manufacture nylon-6 worldwide, which acts as the precursor for producing fiber, plastic, resins, so on. taichung commercial bank co ltdWebMoreover, a monolithic TS-1/cordierite reactor with external looping was utilized to investigate the characteristics of the continuous heterogeneous ammoximation reaction without the organic solvent tert-butanol (TBA). The reaction results showed that the conversion of cyclohexanone and selectivity of oxime approached more than 0.96 and … taichung com bk coWebScheme S1 Reaction network of cyclohexanone ammoximation over titanosilicates. According to the hydroxylamine route, the side reactions were complicated in the cyclohexanone ammoximation, including but not limited to the condensation and consecutive oxidation of ketone, together with deep oxidation of oximes and … taichung city third marketWebAbstract The skeleton desilication accompanied by Ti active sites leaching accounts for the dominant chemical deactivation reasons during the clean industrial production of … twice baked sweet potatoes delishWebOct 10, 2014 · It was first reported by Roffia et al. in 1988 that TS-1 had an excellent catalytic performance in the reaction of cyclohexanone ammoximation to cyclohexanone oxime with NH 3 and H 2 O 2. Although the mechanism of ammoximation is still controversial, the hydroxylamine route has been generally accepted in recent years (see … twice baked sweet potato casseroleWebNov 22, 2016 · In this paper,boron-modified titanium silicalite-1(B-TS-1)was synthesized,and its catalytic performance was studied.B-TS-1 improved the stability of cyclohexanone ammoximation.Combined with the root of deactivation of the catalyst and H2O2reaction behavior in the liquid-phase ammoximation process, analysis showed that H2O2is the … twice baked sweet potatoes ree drummond