Patent ID: 11939681
Assignee: SOUTHWEST PETROLEUM UNIVERSITY
Field: Surface technology, coating (Chemistry)
Classification: CPC C  Y | IPC C

Claim 1:
2. The plant composite corrosion inhibitor for the oil field according to claim 1, wherein preparation steps of the first plant ingredient specifically comprise: washing fresh marigold, disinfecting the washed marigold with anhydrous ethanol, drying the disinfected marigold at 40° C., then grinding and crushing the dried marigold, placing obtained marigold powder in an extraction kettle of a supercritical extractor, using supercritical CO2 as a solvent to flow upwardly at a constant flow rate of 0.012 kg/min for 6 hours, using anhydrous ethanol as a co-solvent to send into a preheating container in front of the extraction kettle through a high performance liquid chromatography pump, wherein the extraction kettle has an extraction pressure of 36.7 MPa and an extraction temperature of 40.5° C., when each cycle is ended, depressurizing an effluent flow in a heated back pressure valve, collecting an extract in a cooled two-chamber collection container, dissolving zeaxanthin and a derivative thereof in ethanol, and removing the solvent by evaporation to obtain the first plant ingredient.