The QL-03 corrosion inhibition system is obtained by the compounds of quinoline quaternary ammonium salt，mannich base and synergist. The mechanism of QL-03 with HP13Cr in 20%HCl is investigated by potentiodynamic polarization curves, EIS and weight loss measurements. The results show that the inhibition efficiency towards HP13Cr steel is improved greatly and reaches as high as 90% at 90°C, as a mixed corrosion inhibition system. Cumulating the inhibition efficiency from electrochemical results is more reasonable than weight loss result.

Investigated the sorption kinetics of methylene blue on spherical chitosan resin. Studied the influences of ionic strength, pH， initial concentration on the adsorption process. The adsorption of methylene blue increases with the decreasing ionic strength and the increasing pH and the initial concentration of the system. Furthermore, the adsorption process correspondes with Lagergren pseudo-second kinetic equation and the finess (R 2 ) of the model was above 0.99.

In this study, the graft copolymerization of acryalmide and acrylonitrile onto chitosan with K2S2O8-NaHSO3 initiator under N2 interaction is studied and the mechanism is discussed. Compared to the chitosan graft of acrylamide or acrylonitrile, the graft yield and graft efficiency of ternary polymerization increase significantly. The stability and reproducibility are also improved obviously. To be specific, the reaction time, the reaction temperature, the effect of the amount of materials, the concentration of K2S2O8, and the concentration of NaHSO3 on the graft yield and graft efficiency is investigated respectively. The C=C of acrylamide and the acrylonitrile react respectively with -NH2 and C6-OH of chitosan initiated by SO4-•. The experimental results show that the optimal synthesis conditions are given as follows: the reaction time is 6h, the reaction temperature is 60°C, the ratio of m(chitosan):m(acrylamide):m(acrylonitrile) is 1:7:5, the concentration of K2S2O8 is 4.5mmol/L, and the concentration of NaHSO3 is about 2.6mmol/L. Under such conditions the graft yield and graft efficiency can be up to 839.52% and 70.00%, respectively.

Using formaldehyde as a crosslinking reagena novel cross-linked chitosan resin was synthesized by orthogonal. The resin material with good properties of sphericity and acidresistivity can be prepared under the optimal experimental conditions, which are found to be 1:6 for the ratio of chitosan and formaldehyde, 60°C for the temperature, 1 h for the reaction time, 640r/min for the stirring rate and 9 for the pH, and the cross-linking rate under the optimal conditions is 401.86%. SEM shows the surface morphology changes of raw materials and products; IR of the raw materials and products shows that the reaction occurs mainly on the amino and the hydroxyl of chitosan, and TG shows that the crosslinking reaction of chitosan can change its heat resistance.

The density functional theory (DFT) calculations explored the structural optimization and the frequency of N-carboxymethyl chitosan (N-CMCS) and O-carboxymethyl chitosan (O-CMCS). For the isomers, the calculations comparatively were performed. The charge distribution and frontier molecular orbit were analyzed by using the natural bond orbital (NBO) method. The results showed: the two rotational isomers a and b can stably exist, with the stability order a>b; N-carboxymethyl chitosan reaction active sites are concentrated in -OH and -NHCH2COOH, while O-carboxymethyl chitosan reaction active sites are concentrated in -NH2 and -CH2COOH; The water-soluble mechanism of carboxymethyl chitosan was investigated deeply, on the one hand, the presence of carboxymethyl of carboxymethyl chitosan had a tendency to ionize H+, on the other hand the carboxymethyl increased the distance and weakened the hydrogen bonds between molecules, even though Einstein shift H-bond is formed in the carboxymethyl chitosan molecules.

With chitosan as the raw material, a new type of resin material is synthesized through formaldehyde crosslinking. The effects of the reactant ratio, the reaction temperature, the reaction time, the stirring rate and the system pH on the cross-linking rate are studied in detail. The resin material is then characterized by means of IR. The experimental results show that the reaction occurs mainly on the amino and the hydroxyl of chitosan. The chitosan-based resin material with good properties of sphericity and acidresistivity can be prepared under the optimal experimental conditions, which are found to be 1:5 for the ratio of chitosan and formaldehyde, 60°C for the temperature, 1 h for the reaction time, 440r/min for the stirring rate and 10 for the pH.

The waste water system generated in the process of production of cuprous chloride was studied. The existing forms of copper in the system and the influence of temperature and pH on the existing forms of copper ion were analyzed and determined through calculating the coefficients of copper complex distribution. In the waste water system, the main forms of copper are CuSO4, Cu2+, CuCl+, CuCl2−, and CuCl32−. Temperature has little influence on the distribution coefficient of Cu(II), but has significant influence on distribution coefficient of Cu(I). With the increase of temperature, the distribution coefficient of CuCl2−, increases significantly while the distribution coefficient of CuCl32− decreases. The pH has nearly no influence on the distribution coefficients of various Cu(I)-compounds, but has sizable influence on the distribution coefficients of Cu(II)-compounds. With the increase of pH, the distribution coefficient of CuSO4(aq) increases while the distribution coefficients of Cu2+ and CuCl+ decrease. According to these results, the anion resin of 201×7 OH− and the cation resin of 732 Na were chosen to dispose the waste water solution of cuprous chloride. Finally, 97.9% copper in the waste water is recovered.

The method of leaching nickel directly with oxidants of sulphate and silver salts with the assistance of ultrasonic was proposed.The influence of stirring speed,S2O82-concentration,leaching temperature,silver ion concentration and granularity on the leaching rate of nickel was investigated.The reaction mechanism of oxidizing leaching was explored.The results show that the influence of stirring speed or granularity on the leaching rate is not obvious in a certain range;with the increase of S2O82-concentration or leaching temperature,the leaching rate of nickel increases,whereas when the temperature is above 70 ℃,the increase of leaching rate is not obvious;S2O82-plays a dominant role in the oxidation action during the leaching process.The presence of a small amount of silver salt can promote the leaching reaction.Through investigating the dynamic parameters of the process,the dynamics in accordance with the shrinking core model is found.The overall reaction rate is controlled by interfacial chemical reaction with apparent activation energy of 39.67 kJ/mol.The macro-dynamic equations of the process are established.

The absorption of sulfur dioxide in simulated flue gas by using liquid-containing membrane was investigated. The process of sulfur dioxide desorption from the absorbent of citrate solution was explored. The influence of the gas-phase, and the liquid-phase on absorption efficiency of sulfur dioxide and the influence of ultrasonic frequency, ultrasonic power and stirring speed on desorption efficiency of sulfur dioxide were examined. The results indicate that the absorption efficiency decreases with increasing flow velocity and sulfur dioxide content in gas-phase, and can be improved by increasing the concentration and the pH value of citrate solution. It is concluded that lower ultrasonic frequency results in a better degassing efficiency. The using of ultrasound in desorbing sulfur dioxide from citrate solution improves the desorbing efficiency in the some conditions, without changing the essence of chemical reaction.

A terpolymer AA-HPA-SVS was synthesized from acrylic acid (AA), 2-hydroxypropyl acrylate (HPA) and sodium vinyl sulfonate (SVS) by following a free radical polymerization procedure. The scale and corrosion inhibition efficiency and dispersion ability of the terpolymer were studied. The results showed that the AA-HPA-SVS terpolymer had good antiscaling properties towards calcium carbonate and calcium phosphate, and good dispersion ability towards ferric oxide. The scale inhibiting efficiency of the terpolymer can reach to 95% and 93% for CaCO3 and Ca3(PO4)2 respectively when the dosage was 20mg/L. Its corrosion inhibition efficiency towards carbon steel was improved greatly when sodium molybdate was added. When 150mg/L sodium molybdate dehydrate was added to 20 mg/L terpolymer, the corrosion inhibition rate can reach to 85%.