Preparation method of alkylbenzotriazole fatty amine salt and oil product additive

The invention relates to the technical field of synthesis, in particular to a preparation method of alkylbenzotriazole fatty amine salt and an oil product additive. The preparation method of the alkylbenzotriazole fatty amine salt comprises the following steps: S1, carrying out first reaction on paraformaldehyde, a primary amine cation collector and alkylbenzotriazole to obtain a first reaction solution; and S2, carrying out a second reaction on the first reaction solution, secondary amine and paraformaldehyde to obtain the alkylbenzotriazole fatty amine salt, wherein the number of carbon atoms of the primary amine cation collecting agent is different from that of carbon atoms of the secondary amine cation collecting agent. According to the preparation method of the alkylbenzotriazole fatty amine salt, two different amines are adopted to react step by step, and no organic solvent is added in the reaction process, so that the yield and the purity of the product are improved. The alkyl benzotriazole fatty amine