Synthesis and characterization of novel polyaspartic acid/urea graft copolymer with acylamino group and its scale inhibition performance

Synthesis and evaluation of an environment‐friendly terpolymer CaCO3scale inhibitor for oilfield produced water with better salt and temperature resistance

“…10,20,27 The experimental process is as follows: the CaCl 2 and NaHCO 3 were used for the preparation solution and the concentrations of Ca 2+ and HCO − 3 were 240 mg L −1 and 356 mg L −1 . 10,20,27 The experimental process is as follows: the CaCl 2 and NaHCO 3 were used for the preparation solution and the concentrations of Ca 2+ and HCO − 3 were 240 mg L −1 and 356 mg L −1 .…”

“…15,16 However, these scale inhibitors will decompose and form phosphate acid due to the increase in temperature and react with calcium ions to form an insoluble calcium phosphate scale. At present, many natural substances have been widely studied as green scale inhibitors, such as polyaspartic acid 20 and polyepoxy succinic acid, 1 starch, 21 and citric acid. 18,19 The second category is the natural scale inhibitors.…”

“…23 The third type is polycarboxylic acid-type scale inhibitors, such as polyacrylic acid and polymaleic anhydride. 20,[26][27][28][29][30][31] To improve the scale inhibition performance of polycarboxylic acid scale inhibitors, many scholars try to take maleic anhydride (MA) or acrylic acid (AA) as the monomer to copolymerize with other monomers, which contains functional groups such as sulfonate group and the amide group. However, most of these scale inhibitors only contain carboxylic groups.…”

Synthesis and characterization of a biodegradable polyaspartic acid/2-amino-2-methyl-1-propanol graft copolymer and evaluation of its scale and corrosion inhibition performance

“…A PASP/urea gra copolymer was prepared by Zhang et al, and its scale inhibition performance against Ca 3 (PO 4 ) 2 was improved. [24][25][26] Although these studies have improved the scale and corrosion inhibition performance of PASP to some extent, there still remains many problems such as the degradation behavior of the copolymer. To obtain a biodegradable inhibitor with outstanding comprehensive properties, it is necessary to introduce new functional groups into the side chain of PASP.…”

Determination of Suitable Anti-Scaling Agent to Inhibit Scale Formation of Water Processed in Coal Power Plant System

“…Generally anti-scalants do not eliminate the scaling constituents or its tendency; instead they delay the onset crystallization (nucleation phase of crystallization) or retard the growth of mineral salt crystals (growth phase of crystallization) [22]. An example of an anti-scaling agent is polyaspartic acid, which is non-toxic, does not contain phosphorous and shows good biodegradability and the carboxylic, hydroxylic and acylamino functional groups in its chemical structure are what give this chemical its scale inhibiting properties, but does not show great inhibiting performance [23]. The functional groups having certain affinities to different scale forming substances.…”