2402-79-1Relevant articles and documents
-
Chambers et al.
, p. 1917 (1979)
-
Facile preparation of Mn3O4 hollow microspheres via reduction of pentachloropyridine and their performance in lithium-ion batteries
Jiang, Zhan,Huang, Kaihua,Yang, Dian,Wang, Shuai,Zhong, Hong,Jiang, Chongwen
, p. 8264 - 8271 (2017)
Mn3O4 hollow microspheres have been facilely prepared via a green synthesis of 2,3,5,6-tetrachloropyridine reduced from pentachloropyridine by manganese. The specific hollow microspheres were made by a H2 gas bubble-templating method presenting a high specific surface area (87.1 m2 g-1) and a big total pore volume (0.2030 cm3 g-1). The Mn3O4 hollow microspheres as an anode material demonstrate a good electrochemical performance, with a high reversible capacity of 646.9 mA h g-1 after 240 cycles at a current density of 200 mA g-1. The good cycling performance is attributed to numerous mesopores, high specific surface area and big total pore volume, which can offer good electrical contact and conductivity as well as accommodate the mechanism strains. In addition, the yield and selectivity of 2,3,5,6-tetrachloropyridine achieved up to 99.2% and 99.5%, respectively.
Preparation method of 3,5-difluoro-2,6-diaminopyridine
-
Paragraph 0009-0012, (2019/02/04)
The invention discloses a preparation method of 3,5-difluoro-2,6-diaminopyridine, and belongs to the technical field of preparation methods of chemical drug intermediates. 2,3,4,5,6-pentachloropyridine is utilized as a raw material; and the 3,5-difluoro-2,6-diaminopyridine is prepared through reduction by a metallic reducing agent, fluorination and aminolysis. The method provided by the inventionis simple to operate, short in reaction time, environmentally friendly in process route and higher in yield, and has higher industrialization value; and an economical and high-efficiency catalyst is adopted.
Preparation method of 2,3,5,6-tetrachloropyridine
-
Paragraph 0021-0023; 0026; 0029; 0031; 0033, (2018/03/25)
The invention discloses a preparation method of 2,3,5,6-tetrachloropyridine and belongs to the field of chemical industry. The preparation method comprises: introducing 2-chloropyridine and chlorine gas as raw materials into a fixed-bed reactor loaded with an activated carbon catalyst, and generating 2,3,5,6-tetrachloropyridine under the action of the activated carbon catalyst. The catalyst uses one or more of AlCl3, NiCl2, CuCl2, ZnCl2, FeCl3, CaCl2, BaCl2, MgCl2, CoCl2 and LaCl2 as active components and activated carbon as a support; the active components in the catalyst account for 4-27% bymass, and the activated carbon accounts for 73-96% by mass; the catalyst uses 2-chloropyridine and chlorine gas as raw materials, and the 2-chloropyridine and chlorine gas is generated under the action of the catalyst that is nontoxic and harmless; the preparation method has high conversion rate, good selectivity and zero pollution.