6004-38-2Relevant articles and documents
Preparation method of adamantanone
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Paragraph 0033; 0043; 0052; 0062; 0070; 0080; 0088; 0098;, (2021/04/03)
The invention discloses a preparation method of adamantanone, and relates to the technical field of adamantanone synthesis. The problems that the reaction time is long and the operation process is tedious are solved. The preparation method specifically comprises the following steps: putting raw materials including adamantane, sulfuric acid and trifluoroacetic acid into a batching kettle, and stirring and mixing at 30 DEG C; raising the temperature to 50 DEG C, and introducing nitrogen into the batching kettle; pressing the mixed materials into a reaction tube, and performing standing for 1 minute; pouring the reaction solution on 500g of ice, adding a NaOH aqueous solution which is 7 times the weight of adamantane during cooling, and adjusting the pH value to 9; and extracting by using methylbenzene of which the weight is 3 times that of adamantane. The raw materials are mixed and then heated, nitrogen is introduced, then an oxidation reaction occurs, the retention time and temperatureof reaction liquid in a reaction tube are controlled in the leading-out period, the reaction liquid is extracted through methylbenzene and the NaOH aqueous solution, the extraction liquid is subjected to reduced pressure distillation concentration, cooling, separation and drying treatment, the final product is obtained, the operation process is relatively simple, the reaction is controllable, andthe time is short.
Hydrogenation of alkenes over nickel nanoparticles under atmospheric pressure of hydrogen
Mokhov,Popov, Yu. V.,Nebykov
, p. 319 - 323 (2016/06/06)
Nickel nanoparticles have been shown to be an accessible catalyst which allows hydrogenation of unsaturated compounds to be accomplished under atmospheric pressure of hydrogen at relatively low temperatures. Linear and cyclic alkenes, styrene and norbornene derivatives, as well as pinenes and camphene have been smoothly hydrogenated under these conditions. In some cases, selective hydrogenation of unsaturated carbon–carbon bond is possible with the other functional group remaining intact.
Oxygen-Deficient Tungsten Oxide as Versatile and Efficient Hydrogenation Catalyst
Song, Jiajia,Huang, Zhen-Feng,Pan, Lun,Zou, Ji-Jun,Zhang, Xiangwen,Wang, Li
, p. 6594 - 6599 (2015/11/18)
Heterogeneous hydrogenation is one of the most important industrial operations, and reduced metals (mostly noble metals and a few inexpensive metals) generally serve as the catalyst to activate molecular H2. Herein we report oxygen-deficient tungsten oxide, such as WO2.72, is a versatile and efficient catalyst for the hydrogenation of linear olefins, cyclic olefins, and aryl nitro groups, with obvious advantages compared with non-noble metal nickel catalyst from the aspect of activity and selectivity. Density functional theory calculations prove the oxygen-deficient surface activates H2 very easily in both kinetics and thermodynamics. Testing on several oxygen-deficient tungsten oxides shows a linear dependence between the hydrogenation activity and oxygen vacancy concentration. Tungsten is earth-abundant, and WO2.72 can be synthesized in large scale using a low-cost procedure, which provides an ideal catalyst for industrial application. Because oxygen vacancy is a common characteristic of many metal oxides, the findings in this work may be extended to other metal oxides and thus provide the possibility for exploring a new type of hydrogenation catalyst.
