磁作用改善离子交换过程的初步探讨

综述了离子交换树脂近年来在制糖生产过程中的应用状况，针对其不足之处，提出通过磁性树脂的研制，将离子交换与高梯度磁分离有机地结合起来，以达到进一步强化和完善制糖工业的离子交换处理系统。     

糖品生产过程中的离子交换问题与分析

本文综述了离子交换树脂近年来在糖品生产过程中的应用情况，针以其所存在的不足之处，提出通过磁性树脂的研制，将离子交换与高梯度磁分离有机结合起来，以达到进一步强化和完善离子交换处理系统，使其将来能在糖品生产中得到更好的发展。     

阴离子交换树脂在制糖工业中的应用

0前言离子交换树脂应闭干制镇工业已有几十年的历史。在厂大的制糖工作者努力下，发明了许多工艺流程，主要可分为三大类，即糖汁的软化，脱色及非糖份的除去（脱盐）。其中的一些工艺流程得以在英、法、德、日、匈、俄、西班牙等国家应用。而在我国，目前仅有广东大旺华侨糖厂应用了离子交换树脂脱色工艺。离子交换树脂应用技术在我国糖业上没能广泛应用的原因主要是经济效益；司题。为此，我们致力于寻找一种即实用又经济的离子交换树脂应用技术，借鉴国外的先进经验，开展了阴离子交换树脂在制糖工业中应用的研究工作，现将研究结果报告…     

离子交换树脂在酒处理中的应用

叙述了离子交换树脂的结构、类型及功能，吸附树脂在低度白酒处理中的应用，离子交换树脂在葡果酒处理和酒精处理中的应用。（陆月霜）     

谷胱甘肽的分离和干燥方法

本文报道了用离子交换树脂从谷胱甘肽提取物中分离谷胱甘肽的可能性，并且用几种干燥方法来干燥谷胱甘肽的分离物。     

谷胱甘肽的分离和干燥方法

本文报道了用离子交换树脂从谷胱甘肽提取物中分离谷胱甘肽的可能性，并且用几种干燥方法来干燥谷胱甘肽的分离物。     

探讨离子交换树脂在水处理中的应用

本文首先从离子交换树脂结构和分类、离子交换原理、离子交换树脂应用范围、离子交换树脂回收再利用等方面阐述离子交换树脂水处理工艺,然后从仪器和试剂、离子交换树脂复苏类型、复苏原理及复苏结果等方面阐述离子交换树脂再生复苏工艺,再从仪器和试剂、复合材料制备与测定、吸附量测定、有机染料测定、测定结果分析等方面阐述离子交换树脂活性...     

离子交换技术在食品工业中的应用

<正> 自1935年Adams和Holmes成功地研制了酚醛型离子交换树脂以来,离子交换树脂的应用已经历了60多年的发展历史。各种类型离子交换树脂的相继出现、应用技术的不断改善,应用范围的日益扩大,都显示了离子交换树脂所具备的优越性和发展潜力。目前,离子交换树脂已由最初在水处理工业中的应用,延伸到化工、电力、电子、环境科学、湿法冶金、分析化学、食品加工和医疗药物等领域中,形成一个独特的化工操作单元。本文主要阐述离子交换树脂近几年来在食品工业中的应用情况。     

离子交换树脂在食品工业中的应用

离子交换树脂是食品和发酵工业应用中最活跃、最有创造力的一个领域，它对食品工业的发展起着举足轻重的作用：随着我国改革开放的深入和人民生活水平的提高，人们对饮食消费的要求越来越高，食品的安全、卫生、无毒是人们长期以来追求的一大趋势，而离子交换树脂在这方面起了重要作用，因此树脂在食品工业中的应用将越来越广，对树脂的要求也越来越严。本文介绍了有关树脂对食品进行提纯、去味、脱色、分离催化等方面的作用及具体的操作方法，希望能够为相关研究者和企业提供有益的参考？     

机械浆中树脂类物质脂肪酶处理的变化

利用DEAE-sephadex离子交换树脂分离方法将TMP浆料树脂组分的抽出物进行了分离分析.通过红外分析来探讨脂肪酶对TMP浆料中的树脂组分的降解作用.结果表明,DEAE-Sephadex离子交换方法可以有效地分离树脂类物质的中性和酸性组分;脂肪酶处理后的树脂中的中性组分含量明显减少,酸性组分相对增加;脂肪酶对树脂的降解作用主要针对于树脂类物质的一些中性组分和少部分脂及酸组成.     

Stoichiometry of removal of natural organic matter by ion exchange

Five anion exchange resins, including a magnetic ion exchange (MIEX) resin, were evaluated for removal of Suwannee River Fulvic Acid (SRFA) in the presence of bicarbonate and chloride. The charge density of SRFA, obtained by potentiometric titration, was used to perform charge balances for ion exchange reactions involving SRFA, bicarbonate, and chloride under different solution conditions. The results clearly show the equivalence of SRFA uptake and chloride release by ion exchange. Although the structure of the anion exchange resins did not affect the stoichiometry of the reaction, the polyacrylic resins did exhibit greater removal of SRFA than the polystyrene resins. The hindered removal of SRFA by the polystyrene resins was hypothesized to be a result of size exclusion. The MIEX resin, which has a polyacrylic structure, performed similarly to the other polyacrylic resins. For the MIEX resin, the separation factor for SRFA over chloride was approximately 8 times greater than for bicarbonate over chloride. This work provides an improved understanding of the interactions between natural organic matter (NOM), inorganic anions, and anion exchange resins, and should result in more effective applications of ion exchange for the removal of NOM in the treatment of drinking water.     

树脂吸附技术在果汁加工中的应用进展

树脂的发展经历了沸石、磺化媒、磺化酚醛树脂、凝胶聚苯乙烯、聚丙烯酸到大孔离子交换树脂和吸附树脂的过程。树脂处理技术具有操作简单、成本低、易于实现自动化以及可以循环使用等优点,从而使该技术在果汁脱色、脱苦和澄清等方面得到广泛的应用。本文详细的介绍了树脂处理技术在果汁加工方面的应用进展。     

猕猴桃酒两种不同降酸方法的研究

壳聚糖及离子交换树脂降酸都可降低猕猴桃酒的酸度。在一定范围内，壳聚糖的加入量与降酸后酒液的滴定酸呈线性关系，1g壳聚糖可以降低0．41g／L的滴定酸，但壳聚糖只能吸附主要有机酸中的柠檬酸和苹果酸，对奎尼酸无作用。流速是影响离子交换树脂降酸的重要因素，较小的流速可使猕猴桃酒荻得较大的处理量，树脂对主要有机酸的吸附顺序首先是柠檬酸．其次是苹果酸，最后才是奎尼酸。壳聚糖和离子交换树脂降酸后的酒进行比较，其中330树脂处理后的酒颜色变化较小，处理量较大，降酸效果较好。     

酒精去杂新工艺的研究

本文根据酒精中的主要有害物质──甲醇、杂醇油和醛的物理和化学性质，系统地研究了物理和化学的去杂方法，确定了酒精去杂的新工艺：待处理酒精→（１号树脂柱）４号树脂柱→（１号分子筛柱）２号分子筛柱→简单蒸馏或过滤→优质酒精。通过该工艺流程，对酒精中的甲醇、杂醇油和醛的平均去除率分别为９３．６％、７７．８％和８０．８％，故该工艺能有效地去除酒精中的杂质。     

Ion exchange and adsorbent resins for removal of acids and bitter principles from citrus juices

A further 20 commercially available ion exchange and adsorbent resins were screened for their affinities for titratable acid and citrus bitter principles. Two anion exchange resins offer the prospect of simultaneous acid reduction and debittering; two cation exchange and five adsorbent resins were moderate to powerful adsorbers of the bitter principles. The food regulation status of these resins is discussed.     

外加磁场作用下强化磁性树脂吸附葛根黄酮的应用效能

在外加磁场磁感应强度为1.0T 时,对原液质量浓度为4.88mg/ml 的葛根黄酮溶液,在pH 值为7 的中性环境下,分别研究磁性树脂的静态和动态吸附,并就使用次数与普通树脂进行比较。结果显示：静态吸附时磁性树脂与普通树脂的吸附效能相差不大;当吸附流速为2BV/h 时,磁性树脂达到饱和吸附时可处理12BV 量的黄酮溶液,优于普通树脂;在使用4 次后,磁性吸附树脂的吸附效果明显优于AB-8 树脂。     

磁性阳离子交换树脂对食品稀糖液中Ca~(2 )、Mg~(2 )脱除效能的初步研究

在研究了３种大孔型阳离子交换树脂脱除食品稀糖液中Ｃａ２＋、Ｍｇ２＋效能的基础上,对稀糖液中Ｃａ２＋、Ｍｇ２＋除去效果最好,交换能力最大的Ａｍｂｅｒｌｉｔｅ２５２树脂采用化学转化法进行磁化处理。比较磁化前后的阳离子交换树脂对食品稀糖液中Ｃａ２＋、Ｍｇ２＋的除去效果,结果表明,磁化过程并不影响树脂的交换容量     

Sustainable sunflower processing — I. Development of a process for the adsorptive decolorization of sunflower [Helianthus annuus L.] protein extracts

A novel process for the production of light-colored sunflower protein isolates was developed, combining mild-acidic protein extraction with adsorptive removal of phenolic compounds. Four commercial food-grade adsorbent and three ion exchange resins were tested with regard to their affinity towards polyphenols. Amberlite™ XAD 16HP and FPX 66 showed optimal decolorization of the sunflower crude extracts. In contrast, ion exchange resins exerted maximal binding of monomeric phenolic compounds, but were less effective in removing colored compounds. Adsorption behavior of individual resins was assessed by adding resin to protein extracts varying the amounts of resin, protein concentration of the solutions and temperature. Furthermore, a D-optimal experimental design was applied to optimize adsorptive polyphenol removal from sunflower protein extracts using a styrene–divinylbenzene copolymer. Adsorption isotherms were determined for 5-O-caffeoylquinic acid and total phenolics, respectively. Optimal conditions were deduced from experiments at different temperatures, with different flow rates and extract concentrations. Finally, adsorbent and ion exchange resin columns were connected in series and successfully applied to produce light-colored sunflower protein on a pilot scale under the conditions optimized in laboratory experiments, thus demonstrating that this technology can easily be integrated into existing process lines.

Industrial relevance

A vital necessity to exploit novel protein sources arises from the increasing demand for human nutrition. Residues originating from sunflower oil production are rich in proteins and might serve as a source of plant proteins, which has not been valorized so far. This is due to their high contents of phenolic compounds that may interfere with the proteins lowering their nutritional value and impairing their sensory properties. Therefore, a process for mild-acidic protein extraction combining adsorption and ion exchanger technology for the removal of polyphenols from crude sunflower extracts was developed in the present study.     

纯水生产中离子交换柱混床再生冲洗终点的研究

理论分析了纯水电导率与离子含量的关系,结合离子交换树脂混床再生冲洗电导率的变化趋势,确定了以电导率为指标的混床再生冲洗终点的控制值,以电导率控制冲洗终点效果良好,比PH控制更,灵敏,同时还分析了终点控制不准确,可能造成氯化钠污染树脂的情况。