Over the last decades, the exploration of new natural sources for obtaining valuable compounds, which can be used in food technology, has been a research challenge. Several natural products, such as fruits, juices, natural extracts, have been proposed. Today, many different technologies are being tested to carry out the extraction of different high-added value compounds (nutraceuticals, phenolic compounds, antioxidants, anthocyanins, saccharides), in which the membrane-based technologies (microfiltration, ultrafiltration, and nanofiltration) have been considered thanks to their intrinsic properties. In fact, these pressure-driven membrane processes are addressed as a promising alternative based on their ability to recover, separate, and fractionate different high-added-value compounds from different aqueous systems. To date, ultrafiltration and nanofiltration have shown the capability to meet the current valorization protocols.

The aim of this paper is to provide a critical review of the main natural products processed by membrane technologies for the recovery of high-added value compounds. State-of-the-art of developments in the field are described. Particular attention is paid to experimental results reported for the separation of bioactive compounds and their derivatives of different molecular weight. The literature data are analyzed and discussed in relation to separation technologies, molecule properties, membrane characteristics and other interesting phenomena that occur during their recovery.

在过去的几十年中，探索新的天然来源以获得可用于食品技术的有价值的化合物一直是研究的挑战。已经提出了几种天然产物，例如水果，果汁，天然提取物。如今，正在测试许多不同的技术来提取不同的高附加值化合物（营养品，酚类化合物，抗氧化剂，花色苷，糖类），其中基于膜的技术（微滤，超滤和纳滤）已经得到了应用。被认为是由于它们的内在特性。实际上，这些压力驱动的膜工艺因其从不同的水性体系中回收，分离和分馏不同的高附加值化合物的能力而被视为有前途的替代方案。迄今为止，

本文的目的是对膜技术处理的主要天然产物进行关键性的综述，以回收高附加值的化合物。描述了该领域的最新发展。特别注意所报道的分离生物活性化合物及其不同分子量衍生物的实验结果。分析和讨论了有关分离技术，分子特性，膜特性和回收过程中发生的其他有趣现象的文献数据。