1-(2, 3, 5, 6-tetrafluorophenyl)-2, 2-dimethyl acetone compound and preparation method thereof

The invention provides a 1-(2, 3, 5, 6-tetrafluorophenyl)-2, 2-dimethyl acetone compound. The structural formula of the 1-(2, 3, 5, 6-tetrafluorophenyl)-2, 2-dimethyl acetone compound is shown in the specification. A synthetic method of the compound comprises the steps that 1, 2, 4, 5-phenyl tetrafluoride serving as a raw material exchanges with n-butyllithium so as to generate 2, 3, 5, 6-tetrafluorophenyl lithium, addition reaction happens between 2, 3, 5, 6-tetrafluorophenyl lithium and tert-butyl formonitrile, and finally the product is obtained through hydrolysis; another synthetic method of the compound comprises the steps that addition reaction happens between 2, 3, 5, 6-phenyl tetrafluoride formonitrile serving as a raw material and tert-butyllithium, and finally the target product is obtained through hydrolysis. The compound provided by the invention has the advantages of short synthetic time and low cost in an application process.

Different-diameter tower separation method of boron-10 and boron-11 isotopes

The invention discloses a different-diameter tower separation method of boron-10 and boron-11 isotopes. In the different-diameter tower separation method, the used equipment is simple in structure, easy to operate, fast to achieve balance, high in separation efficiency and less in energy consumption, products of the boron-10 and boron-11 isotopes with high abundance can be obtained simultaneously, and a rectifying tower is used for rectification and separation on boron trifluoride ether complex. The volume of a rectifying tower is reduced gradually from bottom to top in four sections, wherein the height of the first section is 12m, the diameter of the first section is 600-800mm, the heights from the second section to the fourth section are all 10m, and the volume ratio of the four sections is (10-80:(8-5):(5-3):(2-1); an insulating different-diameter static mixer is connected in series in each section, the diameter of each insulating different-diameter static mixer is reduced gradually ...

Different-diameter tower separation method of boron-10 and boron-11 isotopes