20565-75-7Relevant academic research and scientific papers
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.
Preparation method of novel imidazoline alkyl guanidine corrosion-inhibition bactericide
-
Paragraph 0033; 0034; 0035, (2020/02/14)
The invention discloses a preparation method of a novel imidazoline alkyl guanidine corrosion-inhibition bactericide. The novel imidazoline alkyl guanidine corrosion-inhibition bactericide is characterized in that the preparation method of the novel imidazoline alkyl guanidine corrosion-inhibition bactericide comprises the following steps: preparing imidazoline alkyl guanidine; the method comprises the following steps: (1) adding a fatty acid, polyethylene polyamine and a water carrying agent into a four-neck flask provided with a water segregator and a condenser pipe; heating to 130-160 DEG C, reacting for 3-5 hours, continuously heating to 210-240 DEG C, reacting for 6-10 hours, and removing the excess water-carrying agent and unreacted polyethylene polyamine by using reduced pressure distillation to obtain a fatty acid-based imidazoline; (2) mixing the obtained fatty acid-based imidazoline with guanidine hydrochloride, heating to 150-200 DEG C, and keeping the temperature for 2-4 hours to obtain the novel imidazoline alkyl guanidine corrosion-inhibition bactericide.
Corrosion inhibition bactericide and preparation method thereof, and corrosion inhibition bactericide for CO2 flooding production well
-
, (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.
Imidazoline Mannich base corrosion inhibitor and preparation method thereof
-
, (2019/10/01)
The invention relates to the technical field of corrosion inhibitors, and in particular relates to an imidazoline mannich base corrosion inhibitor and a preparation method thereof. The imidazoline mannich base corrosion inhibitor is of the structure shown in the formula I. The imidazoline mannich base corrosion inhibitor is prepared from, by mass, 10-20% of benzaldehyde, 5-15% of butanone, 40-60%of oleic acid imidazoline, 10-30% of ethanol, 1-5% of concentrated hydrochloric acid and 0.1-0.5% of a catalyst. According to the imidazoline mannich base corrosion inhibitor, a benzene ring, an imidazole ring and an ultra-long hydrophobic alkyl chain on imidazoline are introduced, the benzene ring in benzaldehyde and N atoms in the imidazoline ring have relatively high electron cloud density andcan form a firm coordination bond with an empty d track of metal, and the super-long hydrophobic alkyl chain forms a hydrophobic membrane layer away from the surface of the metal and has a peripheralshielding effect on the surface of the metal, so that the corrosion inhibitor has excellent corrosion inhibition performance in a high-temperature acidification environment.
Carbamido contained bis-imidazoline corrosion inhibitor and preparation method thereof
-
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.
Alkynol-based imidazoline compound, corrosion inhibitor for carbon dioxide oil displacement, and preparations of alkynol-based imidazoline compound and corrosion inhibitor
-
Paragraph 0041; 0042; 0043, (2017/08/02)
The present invention discloses an alkynol-based imidazoline compound, a corrosion inhibitor for carbon dioxide oil displacement, and preparations of the alkynol-based imidazoline compound and the corrosion inhibitor, wherein the alkynol-based imidazoline compound has the following structure formula represented by a formula (I), and the corrosion inhibitor for carbon dioxide oil displacement comprises the alkynol-based imidazoline compound. According to the present invention, by improving the key alkynol-based imidazoline compound preparation method, the applications of the alkynol-based imidazoline compound, the application method and the like, the poor corrosion inhibition of the CO2 corrosion inhibitor can be effectively solved, and the corrosion inhibitor used for carbon dioxide oil displacement and prepared by using the alkynol-based imidazoline compound can effectively inhibit the corrosion on the pipeline during the carbon dioxide oil displacement process. The formula (I) is defined in the specification.
A novel water-soluble hydrophobically associating polyacrylamide based on oleic imidazoline and sulfonate for enhanced oil recovery
Gou, Shaohua,Luo, Shan,Liu, Tongyi,Zhao, Peng,He, Yang,Pan, Qinglin,Guo, Qipeng
supporting information, p. 7805 - 7814 (2015/10/12)
3-(2-(2-Heptadec-8-enyl-4,5-dihydro-imidazol-1-yl)ethylcarbamoyl)acrylic acid (NIMA), 3-(diallyl-amino)-2-hydroxypropyl sulfonate (NDS), acrylamide (AM) and acrylic acid (AA) were successfully utilized to prepare novel acrylamide-based copolymers (named AM/AA/NIMA and AM/AA/NDS/NIMA) which were functionalized by a combination of imidazoline derivative and/or sulfonate via redox free-radical polymerization. The two copolymers were characterized by infrared (IR) spectroscopy, 1H nuclear magnetic resonance (1H NMR), viscosimetry, pyrene fluorescence probe, thermogravimetry (TG) and differential thermogravimetry (DTG). As expected, the polymers exhibited excellent thickening property, shear stability (viscosity retention rate 5.02% and 7.65% at 1000 s-1) and salt-tolerance (10:000 mg L-1 NaCl: viscosity retention rate up to 17.1% and 10.2%) in comparison with similar concentration partially hydrolyzed polyacrylamide (HPAM). The temperature resistance of the AM/AA/NDS/NIMA solution was also remarkably improved and the viscosity retention rate reached 54.8% under 110 °C. According to the core flooding tests, oil recovery could be enhanced by up to 15.46% by 2000 mg L-1 of the AM/AA/NDS/NIMA brine solution at 80 °C.
Some imidazoline derivatives as corrosion inhibitors
Aiad, Ismail Abdelrhman,Hafiz,El-Awady,Habib
, p. 247 - 254 (2011/12/02)
In this study, cationic surfactants having different alkyl chain lengths were prepared by amidation of lauric, myristic, palmitic, stearic, oleic acids with diethylene triamine. The products were quaternized using chlo-roacetic acid. The chemical structure of the prepared compounds was elucidated using different spectroscopic techniques. The critical micelle concentration (CMC) and the free energy of the micellization and adsorption of these compounds were determined by surface tension and conductivity measurements. The products were evaluated as surface-active agents as well as corrosion inhibitors for steel alloy in 1 M hydrochloric and sulfuric acid, the results indicate that these materials have a high efficiency as corrosion inhibitors and as surface active agents. These results were correlated with the chemical structure of the prepared compounds. AOCS 2009.
