Aqueous formulation of oil-soluble corrosion inhibitor, and preparation method and regeneration method thereof

A method for preparing an aqueous formulation of an oil-soluble corrosion inhibitor, comprising the steps of:

• (1) obtaining a temperature T at which the conductivity of the aqueous formulation of the oil-soluble corrosion inhibitor is decreased to no higher than 100 μs/cm;
• (2) gradually adding water dropwise to a corrosion inhibitor stock solution, which is obtained by mixing the oil-soluble corrosion inhibitor and a solvent oil homogeneously, to produce a reverse micelle liquid A, and then heating up the reverse micelle liquid A to a temperature equal to or higher than the temperature T and maintaining at the temperature equal to or higher than the temperature T;
• (3) mixing a non-ionic surfactant, an anionic surfactant and water homogeneously to obtain a mixture solution B, and heating up the mixture solution B to a temperature equal to or higher than the temperature T and maintaining at the temperature equal to or higher than the temperature T;
• and
• (4) mixing the reverse micelle liquid A and the mixture solution B homogeneously, and stirring it at the temperature equal to or higher than the temperature T for no more than 2 minutes before cooling it, to obtain the aqueous formulation of the oil-soluble corrosion inhibitor;
• wherein in step (1), the temperature T is determined by a process comprising:
• mixing homogeneously all raw materials for the formula components of the aqueous formulation of the oil-soluble corrosion inhibitor in advance to obtain a mixture C;
• gradually heating up the mixture C, and detecting the trend of conductivity of the mixture C with the temperature during the heating process, wherein as the temperature increases, the conductivity increases and then decreases and continues to decrease to no higher than 100 μs/cm;
• and
• recording the temperature at which the conductivity is decreased to no higher than 100 μs/cm as the temperature T.