Preparation method of high-base-number hydrocarbyl calcium salicylate

The invention relates to the petrochemical industry field and in particular relates to a preparation method of high-base-number hydrocarbyl calcium salicylate. The method comprises the following steps: carrying out shallow hydrogenation on shell dry distillation liquid to prepare hydrocarbyl salicylic acid; carrying out neutral reaction with lime on prepared hydrocarbyl salicylic acid under the action of a kicker, then introducing carbon dioxide to perform carbonation reaction with the lime, and posttreating to obtain the hydrocarbyl salicylic acid calcium salt products with different base numbers. According to the preparation process, the shell dry distillation liquid with shallow hydrogenation is selected as a raw material and a high-activity kicker, the prepared product is good in biodegradability, and the problem that traditional products can not be degraded and pollute the environment is solved. Hydrocarbyl side chain is longer in the product structure so that the oil solubility of the product is improved. In addition, the selected raw material of the shell liquid is extensive in source, environmental friendly, nontoxic and renewable and is an environmentally friendly production raw material.