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Green is the new black – a review of technologies for carboxylic acid recovery from black liquor
Green Chemistry ( IF 9.3 ) Pub Date : 2020-10-28 , DOI: 10.1039/d0gc02627a Laura Reyes 1, 2, 3, 4, 5 , Clémence Nikitine 1, 2, 3, 4, 5 , Léa Vilcocq 1, 2, 3, 4, 5 , Pascal Fongarland 1, 2, 3, 4, 5
Green Chemistry ( IF 9.3 ) Pub Date : 2020-10-28 , DOI: 10.1039/d0gc02627a Laura Reyes 1, 2, 3, 4, 5 , Clémence Nikitine 1, 2, 3, 4, 5 , Léa Vilcocq 1, 2, 3, 4, 5 , Pascal Fongarland 1, 2, 3, 4, 5
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Carboxylic acids are one of the most important building blocks and feedstocks for fine chemicals, flavors and polymers, yet their production largely relies on petrochemical derivatives or processes that require large amounts of energy or chemicals. To ensure their long-term sustainable production, it is necessary to explore different options of renewable feedstocks. An alternative solution is the recovery of carboxylic acids present in black liquor. These compounds are formed as by-products during the cooking stage in the Kraft pulping process; they are later burnt along with the other compounds present in black liquor to be transformed into energy. However, usually an energy surplus is generated due to the large amounts entering the unit, therefore their recovery and later use as renewable feedstocks could be considered as an advancement in waste valorisation. Furthermore, the extraction of carboxylic acids from black liquor can increase pulp production, boosting the efficiency of the Kraft process. This review aims to examine the different technologies to recover carboxylic acids from black liquor as well as the challenges associated with their incorporation into paper and pulp mills in order for them to become integrated forest biorefineries.
中文翻译：
绿色是新的黑色–从黑液中回收羧酸的技术回顾
羧酸是用于精细化学品，调味剂和聚合物的最重要的基石和原料之一，但其生产很大程度上依赖于石油化学衍生物或需要大量能源或化学物质的工艺。为了确保其长期可持续生产，有必要探索可再生原料的不同选择。另一种解决方案是回收黑液中存在的羧酸。这些化合物是在牛皮纸制浆过程中的蒸煮阶段形成副产品的。它们随后与黑液中存在的其他化合物一起燃烧，转化为能量。但是，通常会由于大量进入设备而产生能量过剩，因此，将它们的回收和以后用作可再生原料的做法可被视为废物估价的进步。此外，从黑液中提取羧酸可以提高纸浆产量，从而提高卡夫工艺的效率。这篇综述旨在研究从黑液中回收羧酸的不同技术，以及将其纳入造纸厂和纸浆厂以使其成为森林生物精炼厂所面临的挑战。
更新日期：2020-11-18
中文翻译：
绿色是新的黑色–从黑液中回收羧酸的技术回顾
羧酸是用于精细化学品，调味剂和聚合物的最重要的基石和原料之一，但其生产很大程度上依赖于石油化学衍生物或需要大量能源或化学物质的工艺。为了确保其长期可持续生产，有必要探索可再生原料的不同选择。另一种解决方案是回收黑液中存在的羧酸。这些化合物是在牛皮纸制浆过程中的蒸煮阶段形成副产品的。它们随后与黑液中存在的其他化合物一起燃烧，转化为能量。但是，通常会由于大量进入设备而产生能量过剩，因此，将它们的回收和以后用作可再生原料的做法可被视为废物估价的进步。此外，从黑液中提取羧酸可以提高纸浆产量，从而提高卡夫工艺的效率。这篇综述旨在研究从黑液中回收羧酸的不同技术，以及将其纳入造纸厂和纸浆厂以使其成为森林生物精炼厂所面临的挑战。
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