| abstract |
The invention relates to the technical field of lubricating oil additives, in particular to a preparation method of a modified bentonite lubricating oil additive, which comprises the following steps: soaking bentonite in dilute acid solution, soaking acid swelling modified bentonite in surfactant water solution for the first time, soaking in saturated copper chloride solution for the second time, quickly burning to obtain bentonite with nano-copper inserted between layers, and grinding and compounding the bentonite, oleic acid, calcium borate, high-temperature antioxidant and organic molybdenum in a sand mill. According to the preparation method of the modified bentonite lubricating oil additive, the copper ions are attached to the bentonite in advance, and then the copper ions are reduced to form the nano-level copper simple substance, so that the difficulty in obtaining the nano-copper is reduced, and the preparation method is convenient to popularize and apply. The modified bentonite lubricating oil additive has good antifriction and wear resistance, good dispersibility in lubricating oil and no agglomeration phenomenon. |