果葡糖浆中果糖分离方法研究进展

介绍了离子交换树脂分离法、色谱分离法、结晶分离法、硼酸盐法、参数泵分离法、复盐分离法等几种果葡糖浆中果糖分离纯化方法,并对各种分离方法的优、缺点进行了阐述。经对比认为,离子交换树脂分离法与色谱分离法因其可以大规模生产而在工业生产中占主导地位;结晶分离法、硼酸盐分离法和复盐分离法等则因其工艺简单、耗能少而更适合于中、小企业生产;参数泵分离法则在节省能源方面独具优势。     

蔗糖转化果葡糖浆的生产工艺和分离提取研究进展

简述了蔗糖水解生产果葡糖浆的相关工艺技术,包括酸催化水解法、酶水解法和阳离子交换树脂法,同时介绍了果葡糖浆的分离技术,包括离子交换树脂吸附分离、色谱分离、结晶分离、硼酸盐分离、复盐分离等,以期为蔗糖转化果葡糖浆的资源化高效利用提供参考。     

从果葡糖浆中分离果糖的研究

本文研究利用蔗糖水解成为果葡糖浆，从果葡糖浆中分离现果糖浆和葡萄糖浆，果葡糖浆的分离方法采用钠盐沉淀葡萄糖或钙盐沉淀果糖的方法，本法采用离子树脂法也称色谱分离法，证实了色谱分离法完全能实现。     

探讨离子交换树脂在果葡糖浆生产中的应用

离子交换树脂在食品和发酵工业应用中最活跃、最有创造力,对食品工业的发展起着举足轻重的作用。由于果葡糖浆在生产过程中会产生杂质,用离子交换树脂法对糖液进行去盐、脱色、提纯、分离等方面的操作,可以提高产品的品质。随着人民生活水平的提高,人们对饮食的要求越来越高,食品的安全、卫生是人们长期以来追求的一大趋势。本文结合离子交换树脂在果葡糖浆生产过程中的应用进行阐述。     

高纯度＆低能耗的生产技术在淀粉深加工领域的应用

以工业色谱分离／MVR节能蒸发技术膜过滤／连续离子交换为代表的现代分离技术,因其高效节能、清洁环保的优点广泛应用于淀粉深加工生产领域。同时,由于这些新技术的应用,不但解决了很多现有生产中的收率低、副产品多的问题,还尽可能的降低了能量消耗。例如柠檬酸新工艺生产、结晶糖母液的处理、木糖母液的分离、维生素C母液的回收等等,都使得这些技术在食品添加剂加工领域中取得了巨大成功。     

模拟移动床色谱分离甘露醇工艺

甘露醇是一种重要的医药、食品原料和助剂,在传统的工业化生产中,结晶甘露醇主要是采用重结晶工艺来实现。该工艺路线较为复杂、能耗高,还存在杂醇不易外排、结晶收率低等缺陷。模拟移动床色谱分离技术是一种可规模化生产的连续色谱分离技术,能较好地克服上述问题。该文采用3组分模拟移动床色谱分离技术对甘露醇的分离效率和分离产物的质量进行了研究;通过对色谱用树脂的选型、分离参数优化,提高了结晶过程中的物料纯度,达到了缩短结晶工艺路线、改善产品质量、提高甘露醇结晶收率的目的。该技术具有分离工艺路线简捷高效、设备运行成本低和工艺自动化程度高等特点,为工业化制备高纯度甘露醇结晶产品开辟了一条新的工艺路线。     

多酚氧化酶的提取及分离纯化研究进展

多酚氧化酶(PPO)是自然界中分布极广的一种金属蛋白酶,能催化邻-苯二酚氧化成邻-苯二醌,也是许多果蔬等农产品酶促褐变的主要原因。本文综述了国内外多酚氧化酶的提取及分离纯化技术的研究进展,包括传统提取方法(如缓冲液匀浆法、丙酮提取法、丙酮粉提取法等)和新型提取方法(超声波辅助提取法和超高压提取法等),传统经典分离纯化方法(如溶剂法、沉淀法)和新型分离纯化方法(如凝胶色谱分离法和离子交换色谱分离法等),旨在为多酚氧化酶的研究和应用,特别是为抑制农产品酶促褐变提供参考。     

现代分离技术在高附加值食品添加剂行业的工业应用

主要介绍膜过滤技术、离子交换技术、色谱分离技术等现代分离技术在食品添加剂生产上的工业应用状况，如果葡糖浆、多元醇、氨基酸、有机酸、维生素、酶制剂等。     

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。     

色层法分离果糖与葡萄糖酸的工艺研究

该文考查各分离介质的几个主要性能指标,选定国产００１×４强酸性离子交换树脂钙型作为分离果糖与葡萄酸的分离介质。在长径比为２５的层析柱上,以正交实验确定最佳的色层分离工艺,其分离度Ｒｆ达到０．８７。实验结果经离子色谱鉴定：富含果糖部分的纯度达９５．５７％,得率９６．１１％,富含葡萄糖酸纯度达９１．９０％,得率９７．８６％。因而本文从理论上和实验上论证了氧化──色层法分离果葡糖浆中的果糖和葡萄糖,是一种效益明显,切实可行的分离工艺。     

树脂在现代果汁加工中的应用

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。现在，树脂在工业生产、生化医疗、环境保护、食品制造，还有国防军事、原子能研究等很多方面都有应用。随着一些新型树脂的问世，它的用途越来越广泛，详细介绍了树脂在果汁加工中的应用。     

732离子交换树脂和DEAE-23树脂纯化大蒜多糖比较

大蒜多糖是具有多种生物活性的杂果聚糖,为探讨其工业化制备的方法,对比了强酸性阳离子交换树脂（732）和DEAE-23树脂制备该多糖的流速、交换容量等操作参数,分析了其产品的蛋白质含量、大蒜多糖产量、红外光谱等质量指标.结果表明：732离子交换树脂和DEAE-23树脂制备的大蒜多糖红外光谱基本一致,产率分别为12.3%和10.37%,732DEAE-23树脂离子交换树脂的交换容量较大,制备过程简单、速度较快,成本较低,是较适宜工业化生产大蒜多糖的方法.     

On the production of glucose and fructose syrups from cashew apple juice derivatives

The cashew crop is an important agro-economic activity in many equatorial areas, although less than 10% of the cashew apple production is exploited industrially. This work focuses on two aspects: obtaining food-grade syrups from cashew apple juice and studying fixed bed adsorption dynamics to separate fructose from glucose. Syrups obtained by concentrating clarified cashew apple juice under vacuum showed similar characteristics to a reference food-grade syrup, with a higher content in fructose, which may contribute to a higher sweetening power with less caloric intake. Adsorption equilibrium studies were performed with synthetic solutions of fructose and glucose by frontal analysis under the concentration range found in the syrups (10-120 g/L) at 30, 40 and 60 °C, using the cation exchange resin Dowex MTO 99Ca. Fructose was more strongly adsorbed than glucose, with measured selectivities ranging from 1.50 to 2.25. Resistance to mass transfer was significant and thought to be due to resin crosslinkage. Glucose and fructose breakthrough curves using cashew apple syrup as feed were practically identical to those measured with synthetic solutions, which leads us to believe that high-fructose syrups may be readily obtained by using current continuous chromatographic units, such as SMB.     

Anreicherung und Gewinnung von Fructose aus lsosirup oder Invertzucker

Enrichment and Production of Fructose from Iso-Sirup or Invert Sugar. For the enrichment and isolation of fructose, principally, a great number of methods can be taken into consideration. In particular should be mentioned precipitation of the fructose as metal fructosate, alternating crystallization of glucose and fructose in presence of alcohol, chromatographic separation by preferably calcium-loaded cation exchangers, isolation of the glucose as glucose/sodium chloride-double compound, complex formation of fructose with free or anion exchanger fixed borates or other complex compounds, and finally oxidation of the glucose by means of glucoseoxidase. The complexing of fructose by means of boric acid and sodium tetraborate is illustrated on the basis of experiments, and studies on the removal of borate by anion exchangers are described. Finally, own experiences in separation of glucose from fructose/gluconic acid mixtures, which were obtained by enzymatic solutions, are reported and an industrial process is proposed.     

D-核糖发酵液电渗析脱盐及工艺优化

D--核糖发酵液中残存着大量的无机离子,如不去除会影响后续D--核糖的纯化。目前工业上常采用离子交换树脂脱盐,随着料液含盐量的增加,其脱盐成本也成比例增加,并产生大量的废水,既不经济也不环保。为明确电渗析脱盐是否可行、具体脱盐成本及最佳的脱盐工艺,以D-D-核糖发酵液的滤液为原料,采用均相阳离子交换膜CMX和阴离子交换膜AMX组成的小试设备LANRAN-40-2040,进行了电渗析法脱盐研究。结果表明,将脱盐率控制在54%,产品收率达到97.68%,但当进一步提高脱盐率时,会有一定量的D--核糖渗透到电渗析浓缩室中,且随着运行时间的增加,浓缩室的D--核糖质量浓度增加较快。采用电渗析联合离子交换树脂脱盐工艺比全树脂脱盐工艺产品收率提高了1.9%,节约一半的离子交换树脂及酸碱用量,并减少一半的废水排放,因此为D--核糖的工业生产提供较好的参考。     

蔗糖水解制取结晶果糖技术研究

为提升制糖产业的综合效益,以白砂糖为原料开发附加值更高的结晶果糖,探讨用蔗糖原料制取高纯度结晶果糖的最优工艺方法.实验以高浓度蔗糖液(55％w/w)为原料,食品酸味剂柠檬酸为水解剂,通过蔗糖水解、脱色、阴阳离子树脂除盐,以钙型树脂分离、纯化果葡糖液,在常温下得到结晶果糖和结晶葡萄糖.实验优化蔗糖最佳水解工艺条件:水解温...     

离子交换法提取木瓜皮中果胶的动力学研究

以木瓜皮为原料,分别研究了离子交换树脂法和酸提法提取果胶的动力学模型,获得速率常数和表观活化能,经过有效性检验和模型预测能力验证,模型均能很好预测果胶提取的动力学过程。离子交换法提取果胶的活化能Ea为23.68kJ/mol,与酸提法获得的37.88kJ/mol相比明显降低,离子交换树脂法提取木瓜皮中果胶明显优于酸提法。在树脂用量为5%、料液比为1∶30(g/mL)、浸提液pH值为1.5条件下,离子交换树脂法提取木瓜皮中果胶的最佳浸提温度为80℃,动力学分析优化最佳结果,得Tmax=117.3min,果胶得率达17.47%,与试验结果相吻合。     

Continuous production of very enriched fructose syrup by the conversion of glucose to ethanol from glucose-fructose mixtures in an immobilized cell reactor

The yeast Saccharomyces cerevisiae ATCC 36859, which preferentially utilizes glucose in glucose-fructose mixtures, was immobilized and used for the continuous production of very enriched fructose syrup. A syrup containing fructose as 99% of the reducing sugars was produced from a 10.1% w/v glucose and 9.8% w/v fructose mixture at a dilution rate of 0.106 h⁻¹. Later in this process when the dilution rate was increased to 0.366 h⁻¹ the ethanol productivity was 12.7 g 1⁻¹ h⁻¹. This is 16% less than the value attained in a similar medium containing only glucose as the carbohydrate. The fructose content was also increased from 55 to 95% of the reducing sugars in a food grade mixture of high fructose corn syrup and Jerusalem artichoke juice. Purification of the product with activated carbon and ion-exchange resin produced a stable, colourless and very enriched fructose syrup suitable for human consumption.