20565-75-7Relevant articles and documents
Thermally stable imidazoline-based sulfonate copolymers for enhanced oil recover
Gou, Shaohua,Luo, Shan,Liu, Tongyi,Xia, Hong,Jing, Dong,Zhang, Qin,Li, Shiwei,Li, Zhonghui,Guo, Qipeng
, p. 85165 - 85173 (2015)
Novel imidazoline-based sulfonate copolymers (noted PAMDSCM and PAMPSCM) were successfully prepared by copolymerization of acrylamide (AM), acrylic acid (AA), 1-acrylamido ethyl-2-oleic imidazoline (ACEIM) with the sodium salts of 3-(diallyl-amino)-2-hydroxypropyl (NDS) or 2-acrylamido-2-methylpropane sulfonic acid (AMPS), respectively. The copolymers were characterized by infrared (IR) spectroscopy, 1H nuclear magnetic resonance (1H NMR) spectroscopy, pyrene fluorescence probe spectroscopy, viscosimetry and thermogravimetry (TG). Both PAMDSCM and PAMPSCM copolymers had excellent high-temperature tolerance in comparison with the same concentration of HPAM, and the residual viscosities were 32.0 mPa s and 31.3 mPa s (viscosity retention rates were 38.8% and 37.1%) at 140 °C, respectively. The copolymers possessed superior long-term thermal stability and their residual viscosity rates were up to 81.8% and 63.8% (52.9 mPa s and 47.1 mPa s) lasting 1.5 hours at 100 °C and 170 s-1, respectively.
Corrosion inhibition bactericide and preparation method thereof, and corrosion inhibition bactericide for CO2 flooding production well
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, (2020/06/16)
The invention discloses a corrosion inhibition bactericide and a preparation method thereof, and a corrosion inhibition bactericide for CO2 flooding production well, and belongs to the field of oilfield chemistry. The corrosion inhibition bactericide comprises an imidazoline quaternary ammonium salt modified product, dodecyl dimethyl benzyl ammonium chloride, dithiocyano-methane and an anti-freezing agent according to a mass ratio of (3-5):(1-2):(0.1-0.3):(3-6), the chemical structural formula of the imidazoline quaternary ammonium salt modified product is defined in the specification, and inthe formula, R is branched hydrocarbon containing 12-17 carbon atoms, and n is any positive integer from 2 to 5. The corrosion inhibition bactericide has excellent corrosion inhibition, sterilizationand anti-freezing properties, and can be applied to corrosion prevention and sterilization environments of high and cold and winter low-temperature environments.
Carbamido contained bis-imidazoline corrosion inhibitor and preparation method thereof
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Paragraph 0019; 0020; 0029; 0030; 0037; 0038, (2017/03/28)
The invention provides a carbamido contained bis-imidazoline corrosion inhibitor and a preparation method thereof. The corrosion inhibitor is bis-imidazoline which is produced through a reaction of imidazoline and urea and contains carbamido in molecules; the preparation method mainly comprises steps as follows: step one, imidazoline is produced from organic acid and diethylenetriamine; step two, imidazoline and urea are subjected to a reaction at the high temperature, and carbamido contained bis-imidazoline is produced. According to imidazoline prepared with the method, multi-point adsorption can be formed on the metal surface through multiple nitrogen atoms in the molecules, carbamido in carbamido contained bis-imidazoline molecules is prone to forming hydrogen bonds with hydroxide radicals on the metal surface, so that the film forming capacity of imidazoline by adsorption on the metal surface is further enhanced, the desorption speed of the corrosion inhibitor from the metal surface at the high temperature is reduced, and corrosion inhibition efficiency is remarkably improved.