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用旋喷冒浆测控旋喷体液固含量及喷射直径 被引量:1
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作者 韦讲汉 《煤田地质与勘探》 CAS CSCD 北大核心 1999年第6期69-72,共4页
对旋喷体进行定量分析是十分必要的。本文以实践经验,结合数学方法对旋喷冒浆进行定量分析,以确定旋喷体的液固含量、旋喷孔口冒浆量、旋喷喷射直径,取得了好的效果。
关键词 旋喷冒浆 液固含量 喷射直径 定量分析 旋喷浆
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无皂乳液VAC/DMC/VHE-水泥基复合材料的性能研究 被引量:2
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作者 张学旭 施强 +2 位作者 耿兵 张书香 许仲梓 《硅酸盐通报》 CAS CSCD 北大核心 2005年第4期49-51,57,共4页
研究了无皂乳液醋酸乙烯酯(VAC)/甲基丙烯酰氧乙基三甲基氯化铵(DMC)/乙烯基羟丁基醚与水泥共混所形成的水泥基复合材料的性能。研究发现,聚灰比为5%或10%时,该复合材料的抗折强度都有相应的提高,而抗压强度变化不大。与较早研究的2种... 研究了无皂乳液醋酸乙烯酯(VAC)/甲基丙烯酰氧乙基三甲基氯化铵(DMC)/乙烯基羟丁基醚与水泥共混所形成的水泥基复合材料的性能。研究发现,聚灰比为5%或10%时,该复合材料的抗折强度都有相应的提高,而抗压强度变化不大。与较早研究的2种无皂乳液与水泥共混所形成的复合材料比较,有更好的性能。 展开更多
关键词 复合材料 液固含量 无皂乳醋酸乙烯酯 甲基丙烯酰氧乙基三甲基氯化铵 乙烯基羟丁基醚 水泥 抗折强度 抗压强度
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Determination of Eleutheroside B and E in Acanthopanax Preparations by High-P erformance Liquid Chromatography with Solid-Phase Extraction 被引量:6
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作者 胡芳弟 封士兰 +2 位作者 赵健雄 陈立仁 徐静汶 《Journal of Chinese Pharmaceutical Sciences》 CAS 2005年第1期51-55,共5页
Aim An HPLC method for analyzing eleutheroside B (ELU B) and eleutheroside E(ELU E) , two of the main active substances of Acanthopanax preparations were studied. Methods Thesamples were analyzed on a kromasil ODS col... Aim An HPLC method for analyzing eleutheroside B (ELU B) and eleutheroside E(ELU E) , two of the main active substances of Acanthopanax preparations were studied. Methods Thesamples were analyzed on a kromasil ODS column with water-acetonitrile as a gradient mobile phase.The flow rate was 0.8 mL·min^(-1) and detecting wavelengths were 206 nm for ELU B, 220 nm for ELUE, solid phase extraction (SPE) and internal standard-salicin were selected. Results The recoveriesof Acanthopanax tablets and injection were 90.4% - 96.8% and 96.4% - 99.8% for ELU B, 87.7% -93.3%and 95.7% - 98.5% for ELU E, respectively. The linear ranges were 4.45 - 22.25 μg· mL^(-1) (r =0.999 8) and 5.11 - 25.55 μg·mL^(-1) ( r = 0.999 7) respectively. Conclusion This method can savethe time for cleaning the chromatographic system and improve sensitivity for Acanthopanaxpreparations , thus providing a way to evaluate the quality of Acanthopanax preparations. 展开更多
关键词 eleutherosides acanthopanax preparations HPLC solid phase extraction
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Solid-Liquid Equilibria of D-Glucose,D-Fructose and Sucrose in the Mixture of Ethanol and Water from 273.2 K to 293.2 K 被引量:5
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作者 龚行楚 王珊珊 瞿海斌 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2011年第2期217-222,共6页
Experimental data on the solubility of D-glucose,D-fructose and sucrose in the mixed solvents com-posed of water and ethanol from 273.2 to 293.2 K were determined.The solubility of D-glucose,D-fructose and sucrose dec... Experimental data on the solubility of D-glucose,D-fructose and sucrose in the mixed solvents com-posed of water and ethanol from 273.2 to 293.2 K were determined.The solubility of D-glucose,D-fructose and sucrose decreased as the ethanol content increased in the mixed solvent.The solubility of D-glucose,D-fructose and sucrose decreased with decreasing equilibrium temperature.The modified UNIQUAC model,S-UNIFAC model and mS-UNIFAC model were applied to predict the solid-liquid equilibria.The prediction results were compared and discussed.Better prediction accuracy was generated using the modified UNIQUAC model. 展开更多
关键词 GLUCOSE FRUCTOSE SUCROSE ETHANOL solid-liquid equilibria
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Factors Influencing Droplet Size of Silicone Oil Emulsion with High Solid Content 被引量:2
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作者 Li Fengyan Zhu Wenli +2 位作者 Zhao Tianbo Dai Danghui Yang Fang 《China Petroleum Processing & Petrochemical Technology》 SCIE CAS 2011年第3期21-26,共6页
A silicone oil emulsion with 60% of solid content was prepared with methyl silicone oil used as the main material by means of the emulsifier-in-oil method.The influence of emulsification conditions on the droplet diam... A silicone oil emulsion with 60% of solid content was prepared with methyl silicone oil used as the main material by means of the emulsifier-in-oil method.The influence of emulsification conditions on the droplet diameter of silicone oil emulsion was discussed.The experimental results showed that the emulsification method,including the quantity of the emulsifier,the time and temperature of emulsification,the emulsifying water dosage,and the stirring speed,had significant impact on the droplet size.The optimal conditions were identified to achieve a smallest droplet diameter of the emulsion at an emulsifier dosage of 6%,an emulsification temperature of 70 ℃,an emulsification time of 30 min,and a stirring speed of 1100 r/min,with water added in two portions at a ratio of 1:1.The high-solid content silicone oil emulsion with a mean droplet diameter of 2.731 μm was prepared under these conditions that could ensure absence of stratification and floating oil under centrifuging at a speed of 3000 r/min for 30 min. 展开更多
关键词 high-solid content silicone oil emulsion particle size EMULSIFICATION
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Effect of Si content on interfacial reaction and properties between solid steel and liquid aluminum 被引量:5
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作者 Tian-peng ZOU Gao-yang YU +5 位作者 Shu-hai CHEN Ji-hua HUANG Jian YANG Zhi-yi ZHAO Ji-ping RONG Jin YANG 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2021年第9期2570-2584,共15页
The effect of Si content on the microstructures and growth kinetics of intermetallic compounds(IMCs)formed during the initial interfacial reaction(<10 s)between solid steel and liquid aluminum was investigated by a... The effect of Si content on the microstructures and growth kinetics of intermetallic compounds(IMCs)formed during the initial interfacial reaction(<10 s)between solid steel and liquid aluminum was investigated by a thermophysical simulation method.The influence of Si addition on interfacial mechanical properties was revealed by a high-frequency induction brazing.The results showed that IMCs layers mainly consisted ofη-Fe_(2)Al_(5)andθ-Fe_(4)Al_(13).The addition of Si reduced the thickness of the IMCs layer.The growth of theηphase was governed by the diffusion process when adding 2 wt.%Si to the aluminum melt.When 5 wt.%or 8 wt.%Si was added to aluminum,the growth was governed by both the diffusion process and interfacial reaction,and ternary phaseτ1/τ9-(Al,Si)_(5)Fe_(3)was formed in theηphase.The apparent activation energies of theηphase decreased gradually with increasing Si content.The joint with pure aluminum metal had the highest tensile strength and impact energy. 展开更多
关键词 intermetallic compounds Si content solid steel liquid aluminum interfacial reaction mechanical properties
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Flocculation of the Moroccan phosphates slimes
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作者 J. Briuni J. Naja R. M'Hamdi 《Journal of Chemistry and Chemical Engineering》 2009年第12期7-14,共8页
In Morocco, the phosphate industry generates by washing during the ore beneficiation in humid way, big quantities of sludge loaded in fine mineral particles (or slimes) with contents of water in the order of 90-95%.... In Morocco, the phosphate industry generates by washing during the ore beneficiation in humid way, big quantities of sludge loaded in fine mineral particles (or slimes) with contents of water in the order of 90-95%. The specific consumption in water for the beneficiation of one tone of dry ore is approximately 0.6 m3. The management of this sludge and the recycling of process water are played to a schema of solid-liquid separation by flocculation, settling then stocking in basins of several dozens hectares. Recovered clear waters are recycled into the circuit of washing. The principal motivation of this work which is a part of EL MAA project is dedicated to the study of the impact of the speed of agitation on the flocculation behavior in terms of dewatering of the phosphate slimes and recycling of the process water. Study was driven on sample of slimes taken in entrance of the thickeners of a Moroccan washing plants, before flocculation. The raw slimes have a concentration in solid of 75.5 g·L^-1, a P205 grade of 17.3% and a free settling velocity 9 cm·h^-1. Fine fraction -2 μm, responsible for the poor settling of slimes is composed in practice of nearly 96% of smectite. It represents 9% of the dry solid content in the slimes. Measurements reveal important variations of the granulometric and textural properties of large floes in response to flocculation, opening ways of optimization for the velocity gradient. 展开更多
关键词 FLOCCULATION phosphate slime water recycling
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Determination of Cholesterol Content in Waste Fat by Dual-wavelength Spectrophotometry
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作者 LIU Jia-di XU Shu-jun +1 位作者 XU Chun-xiang QIN Jin-ping 《Chinese Food Science》 2012年第2期40-42,共3页
[Objective]The aim was to find a way to measure the cholesterol content in deserted oil.[Method]Dual-wavelength spectrophotometry method was used for the determination of cholesterol in edible oil.630 nm and 720 nm we... [Objective]The aim was to find a way to measure the cholesterol content in deserted oil.[Method]Dual-wavelength spectrophotometry method was used for the determination of cholesterol in edible oil.630 nm and 720 nm were set as target band and reference band in this method,respectively.The result was compared to liquid chromatography method.[Result]The relative standard deviation(RSD)was at 1.26% and recovery was between 101.9% and 110.7%.Linear range was 8.0-40.0 μg/ml.The tested result was close to the result of liquid chromatography.[Conclusion]It was proved that this method was easy,fast and accurate.The disturbance of sitosterol was eliminated without isolation.It can be used for fast identification of the authenticity of waste fat. 展开更多
关键词 Dual-wavelength Spectrophotometry Waste fat CHOLESTEROL SITOSTEROL China
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