大豆蛋白废水中乳清蛋白的泡沫分离实验

采用泡沫分离法回收大豆蛋白废水中蛋白,考察了pH值、气体的流速、进料浓度、液柱和泡沫层高度等因素对分离效果的影响.低进气速度、高泡沫层高度、适当的pH值以及低进料浓度有利于较好的分离.结果表明:当进料浓度为0.54 g/L、pH值为5、泡沫层与液池高度比4∶1,通气量为15.0 L/h 时,富集比可以达到3.25;当进料浓度为0.54 g/L、pH值为5、泡沫层与液池高度比3∶1,通气量为15.0 L/h,此时脱除率可以达到48.5%.     

泡沫分离法分离纯化无患子皂苷的研究

采用泡沫分离法分离纯化无患子皂苷溶液,收集溢出分离柱的泡沫液,采用紫外分光光度计分别测定原液和泡沫液的皂苷含量,通过富集比、回收率以及纯度表征分离效果。结果表明:在进料浓度为 2.0 g/L、进料量为 150 mL、气速为 32 L/h、温度为 30 ℃、pH值为4.3条件下,富集比可达到2.153,收率与纯度分别达到 79.19 % 和 74.68 %。     

泡沫分离法回收废水中的全氟辛酸铵的研究

本文研究了用泡沫分离法回收废水中的全氟辛酸铵，通过实验研究了气体流量、进料液流量、进料液浓度、泡沫层高度和清液层高度之比、进料液的pH值等因素对废水中全氟辛酸铵脱除率的影响，得到了最佳的操作条件，为工业设计提供了有用的参考价值。     

连续泡沫分离蛋白质

本文以空气-明胶水溶液体系为研究对象，较为详细地考察了通气量、进料流量、进料浓度、进料位置、泡沫高度、溶液pH值等因素对连续泡沫分离明胶过程中明胶富集度变化的影响．     

连续环状色谱分离工艺的模拟分析

用７３２ＦeＴ＾＋＋＋型树脂为吸附剂，进行了木糖山梨糖混合溶液的分离试验。通过环 状色谱床层中的物料衡算，取得了连续性方程的解，再以表征双组分混合液分离效果的参数定义为基础，假定了相平衡关系、返混规律和相间传质机制不变的情况下，用木糖或山梨糖色谱分离收集液的产率和分离度为目标函数，以进料浓度、进料液流量、冲洗液流量、床层高度和床层旋转速度等操作条件为变量进行估算，取得了一系列曲线和一些规律，可为连续     

含铜和含锌稀溶液的吸附泡沫分离技术的研究

运用自制的泡沫分离塔,以十二烷基硫酸钠为表面活性剂对泡沫吸附分离含铜及含锌溶液的操作参数进行了研究。考察了料液浓度、pH值、气体流量、表面活性剂浓度等因素对含铜和含锌溶液泡沫分离效果的影响。结果表明：最佳操作参数为pH值5．0,料液浓度0．125mmol／L,进料流速50mL/min,气体流量100mL/min,表面活性剂浓度0．25mmol／L。同时从理论上推算出泡沫吸附分离铜离子的最佳pH值范围为5．0左右。实验还通过改变孔板的孔径大小以改变气泡的尺寸,特别研究了泡沫尺寸对泡沫吸附分离的影响。     

液膜分离过程的新发展—内耦合萃反交替分离过程

内耦合萃反交替分离过程是液膜分离过程与混合澄清槽式溶剂萃取过程相互交叉，渗透的产物。它利用相混合原理与流体力学原理的有机结合实现了以混合澄清槽为传质单元设备的非平衡传质过程，是液膜分离过程的新发展。     

超声波技术及应用(Ⅲ)--超声波在分离技术方面的应用

对超声在提取、膜分离、结晶、絮凝、吸附与脱附、泡沫浮选及双水相萃取等分离技术中的应用进行了综述;超声波具有许多独特效应,如空化效应、湍动效应、微扰效应、界面效应和聚能效应等,因此能够提高传质系数,强化分离过程,结合各自分离过程的特点,分析了超声强化各分离过程的作用机制;指出目前超声在分离技术方面的研究重点。     

泡沫分离法分离桔梗皂苷的工艺研究

采用间歇式泡沫分离法对桔梗提取液中的桔梗皂苷予以分离工艺条件研究;实验以富集比、回收率以及带液率为指标衡量分离效果,在单因素试验基础上,通过正交试验法,获得桔梗皂苷的最佳分离条件。结果表明分离桔梗皂苷的最佳工艺条件为:进料浓度0.014 mg/m L,气体流速700 m L/min,温度30℃,表面活性剂用量(0.505 mg/m L)30 m L,回收率为77.58%,富集比为2.50,带液率为21.67%。因此泡沫分离桔梗皂苷是一种简单、有效、可行的分离方法。     

泡沫相部分水平泡沫分离塔强化分离牛血清蛋白的工艺研究

为了加强泡沫相排液,提高目的产物的富集比,设计了一种新型泡沫分离塔即泡沫相部分水平泡沫分离塔.以传统泡沫相垂直泡沫分离塔为对照塔,以牛血清蛋白(BSA)为体系,考察了表观气速、装液量、物料初始浓度和初始pH对牛血清蛋白(BSA)富集比和回收率的影响.结果表明泡沫相部分水平泡沫分离塔有效减小了泡沫相排液的阻力,提高了BS...     

Élements de calcul des colonnes de fractionnement par moussage continu

Foam fractionation is considered as a unit operation. A theory based upon dimensional analysis is used for calculating continuous fractionation columns. Internal reflux ratio resulting from foam instability was taken into consideration and a numerical value is given. The concepts of specific productivity of the column P* and specific energy consumption E* are introduced. A formula is given for the correlation between P* and the parameters characterizing the column geometry (column diameter, foam height) and operating conditions (gas rate, external reflux ratio, feed concentration, feed rate, feed level).     

Intensified Effect of Reduced Pressure on the Foam Fractionation Process of Bovine Serum Albumin

A novel method to intensify the foam fractionation process by operating the column under reduced pressure was reported in this paper. It was found that a poorer foam stability, a bigger mean bubble size and a wider bubble size distribution in the foam layer, a less upward liquid flux and volumetric liquid fraction at the top of the foam layer, and a higher enrichment ratio but a lower mass recovery of the foam fractionation process were obtained under reduced pressures compared to the ones under atmospheric pressure. The most important effect of the reduced pressure on the foam layer during the foam fractionation process is the encouraged bubble coalescence process which was exhibited by those unusual foam properties discussed above. The limitations of this new method were also discussed.     

泡沫分离法除去水溶液中微量铜离子的工艺

以十二烷基苯磺酸为表面活性物质,自制的单金属离子水溶液为研究体系,对泡沫分离法除去水溶液中金属离子的工艺进行了研究,重点考察了溶液的pH、鼓泡气体流量、表面活性剂浓度及泡沫塔装液量的影响. 结果表明,十二烷基苯磺酸具有良好的起泡性能,对水溶液中铜离子的去除效果也比较理想,最佳操作条件下富集比为18.2,去除率为96.1%,与常规的表面活性剂十二烷基硫酸钠相比,十二烷基苯磺酸在泡沫分离过程结束后不会在体系中残留金属离子,这为探索脱盐新方法提供了依据.     

基于甘草配伍黄芩同时泡沫分离甘草酸和黄芩苷

为了同时分离甘草中有表面活性的甘草酸和黄芩中无表面活性的黄芩苷,开发了甘草配伍黄芩泡沫分离工艺。通过荧光光谱、紫外吸收光谱和红外吸收光谱分析表明,甘草酸与黄芩苷存在相互作用,并且甘草黄芩配伍强化了甘草酸和黄芩苷的提取。以甘草酸和黄芩苷的富集比和回收率为评价指标,当温度为40℃、气体体积流量为100 ml·min^-1、甘草酸初始浓度为0.2 g·L^-1、甘草黄芩质量比为3：1时,获得甘草酸的富集比和回收率分别为11.0和73.5%,黄芩苷的富集比和回收率分别为5.8和38.5%。通过甘草与黄芩配伍,利用泡沫分离获得黄芩中的黄芩苷。同时,与单独泡沫分离甘草中甘草酸相比,甘草酸的富集比提高了194.9%,回收率提高了23.3%。因此,甘草配伍黄芩能有效泡沫分离甘草酸和黄芩苷。     

The removal of sodium,cadmium and chromium ions from dilute aqueous solutions using foam fractionation

Cationic metallic ions such as sodium, cadmium and chromium were flotated from aqueous solution by using foam separation or foam fractionation technique in a continuous flow system. Experimental results showed a considerable difference between mono- or divalent and trivalent metallic ions in their affinity to neutralize the negatively charged surface layer formed at the gas-liquid interface. This was verified by use of the Gouy-Chapman diffuse double-layer theory, except for the case of high concentration of the co-existing collector which formed miscellaneous metal-collector complexes.     

低密度聚乙烯泡沫塑料研究进展

综述了低密度聚乙烯(LDPE)泡沫塑料的研究现状,介绍了共混、交联等改性LDPE泡沫塑料的方法及工艺参数如发泡温度、压力、滞留时间等对LDPE发泡行为的影响,概述了国内外有关LDPE开孔泡沫塑料、LDPE泡沫塑料阻燃性能以及废旧LDPE泡沫塑料回收再利用的研究情况.     

Surfactant Recovery from Water Using Foam Fractionation

Abstract

The purpose of this study was to investigate the use of foam fractionation to recover surfactant from water. A simple continuous mode foam fractionation was used and three surfactants were studied (two anionic and one cationic). The effects of air flow rate, foam height, liquid height, liquid feed surfactant concentration, and sparger porosity were studied. This technique was shown to be effective in either surfactant recovery or the reduction of surfactant concentration in water to acceptable levels. As an example of the effectiveness of this technique, the cetylpyridinium chloride concentration in water can be reduced by 90% in one stage with a liquid residence time of 375 minutes. The surfactant concentration in the collapsed foam is 21.5 times the feed concentration. This cationic surfactant was easier to remove from water by foam fractionation than the anionic surfactants studied.     

Foam fractionation for effective recovery of leaf protein from alfalfa (Medicago sativa L.)

ABSTRACT

Foam fractionation for recovering leaf protein from alfalfa (Medicago sativa L.) has been investigated. The extraction yield of alfalfa leaf protein (ALP) from the dried alfalfa leaves reached 71.90% under the extraction conditions of pH 8.0, temperature 70°C, and extracting time 40 min. For strengthening foam drainage at room temperature, a novel foam fractionation column with a cross-internal component covered superhydrophobic coating was developed. By using the extraction liquor as the feeding solution, a two-stage foam fractionation had been performed. Under the suitable operation conditions, the enrichment ratio and the recovery percentage of ALP were 4.33 and 89.0%, respectively.     

表面活性剂在生物分离领域中的应用

本文综述了表面活性剂在生物分离领域中的应用,具体介绍了胶束与反胶束萃取、胶束催化、胶束电动色谱、胶束液相色谱、泡沫分离和细胞内产物的释放,并对表面活性剂的应用前景及生物分离的发展进行了展望。     

阴离子表面活性剂/蛋白质混合体系泡沫的富集行为

借助泡沫分离法对阴离子表面活性剂十二烷基硫酸钠（ＳＤＳ）、牛血清白蛋白（ＢＳＡ）混合体系中,两种表面活性物质的富集行为进行了研究,并讨论这两种成分的存在对泡沫行为的相互影响。结果表明阴离子表面活性剂和蛋白质混合体系的起泡性能及各成分在泡沫中的富集不同于二者单独存在时的体系;表面活性剂浓度较低时,在泡沫分离中蛋白质和表面活性剂的提浓率较高：而表面活性剂浓度较高时,蛋白质和表面活性剂的提浓率均降低。