Advanced Materials Research Vols. 287-290

Abstract: The inhibition effect of N,N-diethylammonium O,O'-di(2-phenylethyl)dithiophosphate (EPP, [NH₂(Et)₂][S₂P(OCH₂CH₂Ph)₂]₂) against the corrosion of Q235 steel in H₂SO₄ solution was studied by weight loss measurement, potentiodynamic polarization and SEM(scanning electron microscope) techniques. The results show that EPP acts as an excellent corrosion inhibitor in 5% H₂SO₄ by suppressing simultaneously the cathodic and anodic processes via chemical adsorption on Q235 steel surface, which complies with the Langmuir adsorption isotherm. Polarization curves indicate EPP is a mixed-type inhibitor. The effects of temperature, acid concentration and immersion time were also studied.

Abstract: Under certain experimental conditions, the formed coke with hollow and cricoid stria. Through the perfect supposition about briquette carbonization process, the formation mechanism of the hollow and cricoid stria in formed coke is analyzed and the property of physical and chemical change and their conditionality relationship during briquette carbonated are demonstrated by use of the rules of heat conduction, the chemical reaction in the melting stage of colloid matter in coal and hydrodynamics. The conclusions from above analysis has an important instruction for the preparation mechanism of other allied carbon stuff.

Abstract: The burning temperatures of several types of gunpowder were calculated and tested by approximate equation, REAL software and CIT-1MD infrared thermometer. The results show that comparing with approximate equation and CIT-1MD infrared thermometer, the results obtained by REAL software are more accurate.

Abstract: With the beginning of the characteristics of sintering flue gas, the thermodynamics and chemical reaction mechanism of sintering flue gas desulphurization with pyrolusite slurry were analyzed and discussed in the paper. Results shown that the main chemical reaction was oxidation-reduction reaction of sulfur dioxide and manganese dioxide with a high reaction velocity and desulphurization efficiency at the first stage. The reaction speed and the desulphurization efficiency decreased gradually and Mn²⁺ is used as catalyst in the desulphurization reaction with the proceeding of chemical reaction and decreasing of PH value of solution.

Abstract: Human-like collagen (HLC)-Fe complex has been synthesised in aqueous solution. Ultraviolet-visible absorption (UV-vis) spectroscopy and Fourier transform infrared (FTIR) spectroscopy were employed to investigate the interaction between human-like collagen (HLC) and ferrous ion. The results obtained from the experiments indicated that there exactly existed coordination interaction between HLC and Fe²⁺, in addition, the complex was formed via both groups of C=O and N-H of amide in HLC. The binding rate, determined by inductively coupled plasma mass spectroscopy, was about 33.35%.

Abstract: Current density and energy density is one of the most important parameters for designing the electric melting glass furnace. This paper analyzed the relation between current density and energy density based upon the generated representation, mathematical simulation and empirical equation, defined the bearing scope of current density for several kinds of electrodes, discussed the tendency of the change of current density and volume melting rate on different kinds of glasses, provided the theoretical basis to design electric melting glass furnace and established proper thermotechnical regime, so as to ensure the optimum operating condition in electric melting glass furnace.

Abstract: An experimentation project has been put forward to enrich indium from sulfuric acid leaching solution bearing high content of indium: preneutralization using calcine---reduction using zinc sulfide concentrate---neutralization using limestone for precipitating indium, and ascertained optimal dosage of reagent in every procedure through experiment under certain condition: the dosage of calcine is 1.3 times of theoretic value, the dosage of zinc sulfide mineral concentrate is 2.2～2.3 times of theoretic value, the dosage of limestone is double of theoretic value. On this optimal condition, the straight recovery rate of indium is more than 97%, and the content of indium sediment from precipitating is more than 0.1%.

Abstract: By means of an electrochemical study, the influence of Sb³⁺ on cathode polarization process in zinc electrowinning and its kinetics equation and parameters have been studied. The results show that antimony has a depolarization function in the presence of [Sb³⁺] ≥0.5 mg·L–1 in zinc electrowinning, and Sb³⁺ has a polarization function in zinc electrowinning in the presence of [Sb³⁺] ≥1 mg·L^–1, the polarization curve enters into the hydrogen evolution range from the activation range, which indicates that the presence of antimony has adverse influence on the zinc electrowinning process.

Abstract: Ultraviolet (UV) corona inspector is used to detect corona according to the ultraviolet radiation of the discharge. High detecting sensitivity of the inspector requires high ultraviolet transmission property of the detecting window. In this paper, high performance JGS-1 (type name of glass) ultraviolet quartz glass is used as the inspector detecting window material and the ultraviolet transmission characteristics of the glass is studied. A new method with the smart corona detecting module to test the ultraviolet transmission parameter of quartz glass is demonstrated. The comparison results of UV spectrometer and this new method manifest that JGS-1 quartz glass has good ultraviolet transmission character and the new test method with corona detecting module is direct and feasible.

Abstract: The effects of four types of extraction methods on the yield and the quality of coix seed oil were investigated. The extraction yields (EYs) by these methods were: 3.43% (Microwave-assisted extraction, MAE); 2.13% (Ultrasound-assisted extraction, UAE); 1.72% (Aqueous enzymatic extraction, AEE) and 1.29% (Refluxing extraction, RE) respectively. Both the peroxide number and acid value by RE are the highest, while by other methods are almost the same.