Xu, Xiao-Feng; Wang, Yao-Feng; Guo, Tao; Luan, Li-Kun; Liu, Shan-Shan; Xu, Bao-Hua published an article in 2022, the title of the article was Synthesis of adiponitrile from dimethyl adipate and ammonia in the vapor-phase over niobium oxide.Formula: C7H10O3 And the article contains the following content:
An environmentally benign route leading to adiponitrile (ADN), a nylon-6,6 intermediate, was achieved by direct vapor-phase nitrilation of di-Me adipate (DMA) with ammonia (NH3) in a fixed-bed reactor. The challenges of this reaction include not only inhibiting both intramol. cyclization and the intermol. polycondensation of the electron-withdrawing group functionalized carbon chain but also suppressing the thermolysis of aliphatic DMA and ADN. Both amphoteric oxides and acidic oxides enable the transformation but exhibit different reactivities. Under evaluation conditions, the acidic oxides exhibit moderate to good nitrile selectivity, while the amphoteric oxides exhibit high DMA conversions with relatively low nitrile selectivity. Under the optimized conditions, the desired ADN was obtained with a selectivity of 84.3% with 97.7% DMA conversion over Nb2O5-1000 consisting of a monoclinic structure/phase (H-Nb2O5). The structure-performance relationship of this catalyst was preliminarily discussed. Furthermore, a tentative reaction pathway consisting of ammonolysis and dehydration processes in a tandem mode was proposed. The experimental process involved the reaction of Methyl 2-cyclopentanonecarboxylate(cas: 10472-24-9).Formula: C7H10O3
The Article related to adiponitrile dimethyl adipate ammonia vapor niobium oxide, Industrial Organic Chemicals, Leather, Fats, and Waxes: Manufacture Of Industrial Organic Chemicals and other aspects.Formula: C7H10O3
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