Catalyst for preparing high purity taurine and use thereof

A method for preparing taurine, comprising using a catalyst having a structure represented by Formula I in an ammonolysis process of the method,

• wherein R1 and R2 are each independently selected from the group consisting of alkyl, alkenyl, alkynyl, alkoxy, sulfhydryl, a thioether group, aryl, heteroaryl, amino, an amide group, an imide group, cyano, an aldehyde group, carbonyl, carboxyl, a sulfonic acid group, an ester group, and combinations thereof;
• and X is selected from H, a metal element of group IA, or a metal element of group IIA;
• the alkyl is a linear or branched saturated C1-C18 hydrocarbyl;
• the alkenyl is selected from linear or branched alkenyl groups containing at least one C═C double bond and 2 to 12 carbon atoms;
• the alkynyl is selected from linear or branched alkynyl groups containing at least one C≡C triple bond and 2 to 12 carbon atoms;
• the alkoxy is selected from linear or branched C1-C6 alkoxy;
• the thioether group is selected from a methyl sulfide group or an ethyl sulfide group;
• the aryl is selected from phenyl or substituted phenyl, wherein the substituted phenyl means that at least one hydrogen on a benzene ring is substituted by a substituent selected from a hydrogen isotope, halogen, cyano, nitro, carboxyl, an ester group, unsubstituted methylthio, methylthio substituted with 1 to 3 fluorine atoms, C1-C8 alkyl, or C1-C8 alkoxy;
• the heteroaryl is selected from a five- to seven-membered monocyclic aromatic ring containing at least one heteroatom or an eight- to twelve-membered bicyclic aromatic ring containing at least one heteroatom, wherein the at least one heteroatom is selected from N, O or S, and the rest are carbon;
• the amide group is an amide group substituted with a linear or branched C1-C18 alkyl;
• the imide group is an imide group substituted with a linear or branched C1-C18 alkyl;
• the carbonyl is alkoxycarbonyl;
• and
• the ester group is selected from an ester group substituted with a linear or branched C1-C18 alkyl, an aryl ester group, or a carboxylic ester group.