Title: Metal corrosion inhibitor containing nitrogen, phosphorus and sulphur
Application Number: 89108670 Application Date: 1989.11.14
Publication Number: 1043534 Publication Date: 1990.07.04
Approval Pub. Date: Granted Pub. Date: 1992.10.14
International Classifi-cation: C23F11/167,E21B41/02
Applicant(s) Name: Daqing Petroleum College Address: 151400
Inventor(s) Name: Gao Yuzhen, Sun Xuezhong
Attorney & Agent: GAO YANGXIAN
Abstract:
     The invented inhibitor is formed with the complex of phenyl instead of thiourea mixed phosphate and glyoxaline organic acid salt. Its matching proportion is 50-90% of glyoxaline organic acid salt and 10-15% of phenyl instead of thiourea mixed phosphate wherein the phenyl instead of thiourea mixed phosphate is formed in combination of the phosphate ester prepared with mixed alcohol and the phenyl instead of thiourea prepared with saturated hydrogencarbon as solvent. The said metal corrosion inhibitor possesses the feature of strong adsorptive power, large adsorpting quantity and thick adsorpting layer. It can prevent effectively CO2 or CO2EOR from corroding the metal pipe and column under ground in the condition of low sulphur containing ( <5ppm) geology. At the same time, it has the advantages of no pullution, strong versatility and simple technology.
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