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Fractal Geometry of Particle Aggregates Formed in Calcium Sulfite Slurry
sedimentation fractal geometry Stokes' Law
2009/11/16
The solid-liquid separation is an important operation for the regenerated slurry of dual-alkali FGD system, and calcium sulfite could predominate in particle aggregates of the slurry. The settling vel...
Interfacial Properties of Ethyl Cellulose/Cellulose Acetate Blends by HPLC
ethyl cellulose cellulose acetate interfacial property
2009/11/16
The high performance liquid chromatography method (HPLC) with ethyl cellulose/cellulose acetate (EC/CA) blends and EC as column packing material, and small molecular weight compound as probe molecules...
Microscale and Nanoscale Process Systems Engineering: Challenge and Progress
process systems engineering microchemical engineering nanotechnology
2009/11/16
This is an overview of the development of process systems engineering (PSE) in a smaller world. Two different spatio-temporal scopes are identified for microscale and nanoscale process systems. The fe...
P507从酸性硫脲浸金液中回收金
硫脲 萃取 P507
2009/11/13
研究了用P507的煤油溶液作为萃取剂，从酸性硫脲(TU)浸金液中回收金的性能. 用浓度为1.65 mol/L的P507萃取剂在料液[H2SO4]＝0.335 mol/L, 相比O/A=1:1，两相接触时间5 min的条件下萃取金，得到金的一级萃取率达99.80%；用50 g/L的Na2SO3溶液反萃，一级反萃率达82.45%，同时达到金、铁的分离.
Partition Behavior of Penicillin in Three-liquid-phase Extraction System
three-phase extraction penicillin
2009/11/13
Partition behavior of penicillins G and V was studied in a novel three-liquid-phase extraction system, which is composed of butyl acetate (BA), polyethylene glycol (PEG), ammonia sulfate [(NH4)2SO4] a...
PVA-TEOS/PAN渗透汽化膜的制备及其乙酸乙酯脱水
聚乙烯醇 渗透汽化 乙酸乙酯-水溶液
2009/11/13
以聚丙烯腈(PAN)中空纤维超滤膜为底膜，以聚乙烯醇(PVA)和正硅酸乙酯(TEOS)的混合液为涂膜液，采用溶胶-凝胶法制备了PVA-TEOS/PAN渗透汽化复合膜，并用于乙酸乙酯脱水. FT-IR和XRD谱图证实复合膜表层中由于PVA与TEOS的交联反应而形成了Si?O?C共价键，且PVA的结晶度下降. 另外，利用静态接触角测量对复合膜表层的亲水性进行了表征. 考察了复合膜在乙酸乙酯水溶液中的溶...
P型沸石膜的合成及表征
沸石膜 P沸石 水热合成
2009/11/13
采用水热合成法，详细考察了凝胶碱度对P沸石及其膜的合成的影响，发现凝胶碱度变化对合成晶化产物结构具有决定性影响，确定在实验条件下最佳合成碱度为Na2O/H2O=0.0163~ 0.0212. 在长250 mm、平均孔径3~5 mm的a-Al2O3陶瓷管外表面经二次涂膜，直接原位合成出膜厚约10~12 mm的沸石膜；XRD, SEM及H2, N2单组分气体渗透表征测试表明，载体管上的晶粒均匀规整，互...
Recovery of Copper from Leaching Solution of Copper Smelting Ash
recovery copper copper smelting ash N902
2009/11/13
An efficient and reliable approach based on solvent extraction to selectively recover copper from leaching solution of Jinchuan copper smelting ash has been developed in this work. And the extraction ...
Seeded Induction Period and Secondary Nucleation of Lithium Carbonate
lithium carbonate reactive crystallization secondary nucleation
2009/11/13
Seeded nucleation of lithium carbonate in aqueous solution during reactive crystallization was monitored by FBRM (focused beam reflectance measurement) and PVM (particle video microscope). The impacts...
Simulation of multi-component multi-stage separation process -An improved algorithm and application
separation distillation multi-component simulation
2009/11/13
This paper presents a flexible model and a robust algorithm for simulation of multi-stage multi-component separation processes in which multiple feeds, side streams, strippers and/or side heat exchang...
Span-20和Tween-80对发酵液中Nisin泡沫分离的影响
泡沫分离 非离子表面活性剂 乳链菌肽
2009/11/13
含0.5 g/L Tween-80发酵液；Tween-80的加入破坏了气泡表面的网状结构，因而泡沫层持气量较高；连续通气时，2种表面活性剂都会引起泡沫层高度降低，但Tween-80会增加泡沫层的稳定性. 当Tween-80浓度达0.5 g/L时，Nisin的收率大幅度提高，原因是分离过程中Nisin失活率减少.
Unseeded Induction Period and Primary Nucleation of Lithium Carbonate
lithium carbonate primary nucleation reactive crystallization
2009/11/13
A set of laser apparatus was used to study induction period and primary nucleation of lithium carbonate in reactive crystallization. The results show that induction period increases with the decrease ...
丙烯腈装置气液分离器的出口结构
气液分离器 出口结构 分离效率
2009/11/13
气液分离器是丙烯腈生产装置的关键设备之一，用于除去气体产品中的酸雾. 分离器的出口结构是影响分离效率的关键因素之一. 本研究借助通用流体分析软件PHOENICS对气液分离器内流场进行了分析，结果发现，增大液滴向器壁运动机会和减弱二次夹带效应均有利于提高分离效率. 基于此原则，对气体出口结构进行了优化实验，并提出了最佳的分离器双层套筒出口结构. 这种结构与其他几种结构相比除雾效果更佳，不管在低空速还...
在N2气保护下对颗粒状活性炭进行了不同温度(400—800 ℃)下的高温改性, 考察了不同的空气流湿度(30%—80% R.H.)下全氟异丁烯(PFIB)在活性炭床层中的吸附穿透行为. 利用Wheeler方程对穿透数据进行了处理, 并采用线性平衡吸附体系的动力学模型对床层的穿透实验数据进行了关联. 结果表明, 基炭经高温改性后, 活性炭的孔隙结构没有明显变化, 表面含氧量随处理温度的提高而减少, ...