Binuclear quaternary ammonium salt ionic liquid compound and application thereof

The invention discloses a binuclear quaternary ammonium salt ionic liquid compound and application thereof, and the binuclear quaternary ammonium salt ionic liquid compound can be used for rapidly trapping low-concentration H2S, performing in-situ conversion on an alpha, beta-unsaturated carboxylic ester compound for reaction, and selectively preparing monomer mercaptan and dimer thioether. According to the method, H2S can be quickly captured and various alpha, beta-unsaturated carboxylic esters can be converted into corresponding dimer thioether products in situ under the condition of H2S low partial pressure or normal pressure through pressure regulation and temperature regulation, four substrates can be highly selectively converted into monomer thioalcohol products under the condition of H2S high partial pressure, and the monomer thioalcohol products can be obtained through centrifugal operation. The separation of the ionic liquid catalyst and the product can be conveniently realized. According to the nove