2 results about "Trimethyl orthoformate" patented technology

The application provides a preparation method of 3-aryl / alkyl-beta-naphthyl ether compounds, and the preparation method comprises the following steps: reacting trimethyl orthoformate with 1,3-diaromatic propyl ketone compounds or 1-aryl-3-alkyl ketone compounds to obtain 3-aryl-beta-naphthyl ether compounds or 3-alkyl-beta-naphthyl ether compounds. The reaction condition of the application is mild, trimethyl orthoformate is cheap and easy to obtain, can be used as a methylation reagent and a carbon source for extending a carbon chain at the same time, the range of reaction substrates is wide, and the functional group tolerance is good; the reaction is efficient, the selectivity is high, the post-treatment is simple, the operation is simple, and the application is suitable for large-scale industrial production; the complex substrate prepared in advance in the traditional reaction is avoided, the metal catalyst necessary for the traditional reaction is not needed, the binaftyl alcohol precursor compounds can be prepared with high chemical selectivity, and a more simple and efficient route is provided for the olefin hydroformylation / hydroformyl esterification reaction for synthesizing bidentate ligands.

The application discloses a preparation method of a nanofiber-based flame-retardant functionalized diaphragm and a lithium battery. The preparation method comprises the following steps: adding polyacrylonitrile into N,N-dimethylformamide and stirring until the PAN is completely dissolved to obtain a spinning precursor solution; performing electrostatic spinning on the spinning precursor solution to obtain a PAN nanofiber membrane; dropping trimethyl orthoformate into trifluoromethanesulfonic anhydride to obtain a first mixed solution; soaking the PAN nanofiber membrane in the first mixed solution and stirring and soaking; adding a second mixed solution composed of diethyl phosphite and dichloromethane into the first mixed solution, stirring and soaking and reacting to obtain the nanofiber-based flame-retardant functionalized diaphragm. The prepared phosphate-based functionalized PAN diaphragm has good flame retardancy and can be self-extinguished rapidly when contacting a flame; has high heat resistance and still maintains good fiber morphology at 200 DEG C; exhibits a high electrochemical stability window, so that the diaphragm also shows excellent application potential in high-voltage-resistant batteries.