耐腐蚀易剥离贴体CIIR复合包装膜的研制

以CIIR的甲苯溶液为主体材料制备一种耐腐蚀易剥离的具有底层和表层的复合包装膜,底层配方为:CIIR溶液(将5.0 g CIIR溶于50 mL甲苯中制得) 100.脱模剂D 10.缓蚀剂苯并三氮唑 1.5.性能测试结果表明.该膜透明,气密性和弹性好,可有效隔离环境中的水分和有害介质对金属材料的腐蚀,包装工艺简单,易剥离,且剥离时不会沾掉锈层,可作为武器、设备和金属文物等的优良包装材料.     

累托石对水中扑尔敏的吸附性能

对累托石对水中扑尔敏的吸附性能进行了研究,系统地研究了吸附时间、溶液浓度、pH值对其吸附行为产生的影响。实验结果表明:累托石对扑尔敏的吸附速率先快速增大后趋于平缓,反应系统达到吸附平衡的时间约为22 h;在等温吸附研究中,室温下累托石对扑尔敏的最大吸附量为121.76 mg/g,吸附等温线方程符合Langmuir等温模型;吸附行为符合拟二级动力学方程;在pH值为2～8时,吸附量随pH值的升高而增大。     

热酸结合改性高岭石及流化催化裂化催化剂载体性能

以热酸结合改性高岭石为载体材料制备流化催化裂化（FCC）催化剂,研究改性对FCC催化剂催化性能的影响。结果表明:经热酸改性后,高岭石产生了微弱的B酸位和L酸位,比表面积由21.4 m²/g增至44.6 m²/g。与高岭石基FCC催化剂相比,改性高岭石基FCC催化剂性能大幅提升,转化率提高1.97个百分点,重油率降低1.62个百分点,总液收增加1.54个百分点。     

微生物-化学耦合法再生活性炭的研究(英文)

In this study,spent activated carbon(AC) saturated with caramel was regenerated by using yeast and NaOH.The efficiency of regeneration was evaluated under parameters such as amount,treatment time,temperature,pH value,stirring temperature of yeast and NaOH concentration.The optimum condition for AC regeneration was 8 h for yeast treatment time,35 ℃ for 0.075% yeast culture temperature,a pH value of 6 for the yeast dealing with the spent AC,90 ℃ for NaOH stirring temperature of AC and 6% NaOH for washing after the spent AC was treated by yeast.Under these conditions,methylene blue(MB) adsorption was 213 mg·g-1 in comparison with 60 mg·g-1 of spent AC.The micro structure and surface area of the regenerated AC were characterized by scanning electron mi-croscope(SEM) and N2 sorption,respectively.The pore size distributions of virgin and regenerated AC were ana-lyzed by means of H-K equation,resulting in a mean pore diameter of 1.28 nm and a pore volume of 1.13 cm3·g-1.This study provides data for theoretical support of the AC regeneration technology.     

碳酸盐储层用VES转向酸的黏弹性(英文)

Storage modulus and loss modulus is the main performance index of visco-elastic properties. In this paper the storage modulus and loss modulus of a new diverting acid and their influencing factors were systematically investigated. Besides, the constitutive equations of the diverting acid at different temperatures were elicited from shearing experiments, which show that the visco-elastic surfactant (VES) acid system is a non-Newtonian power law fluid at low temperature and a Newtonian fluid at high temperature. The storage modulus and loss modulus at different temperatures, pH, and VES content in the acid are critical for the design of acid stimulation for oil well, especially when the VES acid is used in this field only on trial and the basic data are in urgent needed for the design and construction of the acidification stimulation.     

应变和氯离子浓度对304不锈钢点蚀敏感性的影响

The effects of strain and chloride concentration on pitting susceptibility for type 304 stainless steel were studied in situ using the electrochemical technology under constant strain. The impact factor fc was brought forward to value the effect of strain on pitting. The pitting behaviors of type 304 stainless steel in various chloride concentrations under the strain levels 0%, 10%, and 30% were investigated. Potentiostatic polarization technology was used to study how the chloride concentration affected corrosion current density. The results indicated that fc increased substantially and pitting potential varied remarkably when chloride concentration was over 90 mg.L . Under the three levels of strain mentioned above, when chloride concentration was below 463 mg.L^-1,121 mg.L^-1, and 98 mg.L^-1 respectively, the pitting potential shifted towards positivity and, the passive film became more stable. When the strain was below 10%, the pitting susceptibility of type 304 stainless steel varied greatly as strain increased, whereas the susceptibility only changed a little when the strain was over 10%.     

Performance of EDAB-HCl acid blended system as fracturing fluids in oil fields简

Due to the high price and formation damage of the guargum fracturing fluid, many oilfields are more and more interested in surfactant based fracturing fluids. The rheological properties of erucicamide dimethyl amidopropyl betaine （EDAB）-HC1 acid blended system and its suitability as fracturing fluid were investigated in this work. The effects of pH, concentration of EDAB, and temperature on the rheological properties of the blended system were studied. The results show that addition of EDAB improved the viscosity of the system from less than 10 mPa. s to about 400 mPa. s, which could retard the acid-rock reaction to about one half at 60℃ and one quarter at 90℃ comparing to straight HC1 acid, suggesting that there is sufficient time for the blended fluid to react with formation rock when it is used as fracturing fluid in an oil field. Core flow tests demonstrated that the EDAB-acid blended fluid could divert itself from high permeability formation core to low permeability one, thus ensuring proper acid placement in the target reservoirs.     

低硬度循环冷却水中Cl^-、SO4^2-及水处理剂对304不锈钢腐蚀行为的影响

采用极化曲线、电化学噪声、电化学阻抗谱(EIS)和能量色散谱(EDS)等方法研究Cl-、SO42-及水处理剂RP-98H对304不锈钢在低硬度循环冷却水中腐蚀行为的影响.探讨了RP-98H对304不锈钢在低硬度循环冷却水中的缓蚀机理.结果表明,Cl-增强了304不锈钢的点蚀敏感性,SO42-能够减缓Cl-的侵蚀,而RP-98H能够在304不锈钢表面迅速成膜,提高其点蚀电位.该水处理剂为混合型水处理剂,其缓蚀率可达84.8%,最佳使用浓度为100 mg/L.     

Fabrication of Super Hydrophobic Surfaces on Copper by Solution-immersion

Super hydrophobic copper wafer was prepared by means of solution immersion and surface self-assembly methods. Different immersion conditions were explored for the best hydrophobic surface. Scanning ele...     

Apparent Dissolution Kinetics of Diatomite in Alkaline Solution

The dissolution kinetics of diatomite in alkaline solution is the theoretical basis for the process optimization of alkali-diatomite reaction and its applications. In this study, the dissolution kinetics of diatomite in NaOH solution is investigated. The results indicate that the dissolution reaction fits well the unreacted shrinking core model for solid-liquid heterogeneous reactions. The apparent reaction order for NaOH is 2 and the apparent activation energy for the reaction (E_a) is 28.06 kJ·mol^-1. The intra-particle diffusion through the sodium silicate layer is the rate-controlling step. When the dissolution reaction occurs at the interface of unreacted diatomite solid core, the diffusion in the trans-layer (the liquid film around the wetted particle) reduces the rate of whole dissolution process.