Lipophilic extractives from several nonwoody lignocellulosic crops (flax, hemp, sisal, abaca) and their fate during alkaline pulping and TCF/ECF bleaching.
Lipophilic extractives from several nonwoody lignocellulosic crops (flax, hemp, sisal, abaca) and their fate during alkaline pulping and TCF/ECF bleaching.
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DOI：
10.1016/j.biortech.2009.08.036
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发表时间：
2010
影响因子：
11.4
通讯作者：
G. Marques;J. D. del Río;A. Gutiérrez
中科院分区：
文献类型：
--
作者：
G. Marques;J. D. del Río;A. Gutiérrez
研究了几种非木本植物（亚麻、大麻、剑麻和abaca）中用于纤维素制浆的亲脂提取物在碱/蒽醌（AQ）制浆和全无氯（TCF）和无元素氯（ECF）漂白过程中的命运。为此，采用气相色谱-质谱联用技术对原料及其未漂白和漂白的工业纸浆中的亲脂提取物进行分析。碱/AQ制浆后，醛、羟基脂肪酸和酯蜡、甾醇酯和烷基阿魏酸酯等酯化化合物大幅减少，而烷烃、醇、游离甾醇和甾醇苷在蒸煮过程中幸存下来。在未漂白纸浆中保留的亲脂提取物中，TCF纸浆中仍存在一定量的游离甾醇，而ECF纸浆中几乎没有。在TCF和ECF漂白后，甾醇苷也被去除。相比之下，两种漂白纸浆中仍存在饱和脂肪酸、脂肪醇和烷烃。
The fate of lipophilic extractives from several nonwoody species (flax, hemp, sisal and abaca) used for the manufacturing of cellulose pulps, was studied during soda/anthraquinone (AQ) pulping and totally chorine free (TCF) and elemental chlorine free (ECF) bleaching. With this purpose, the lipophilic extracts from the raw materials and their unbleached and bleached industrial pulps, were analyzed by gas chromatography–mass spectrometry. Aldehydes, hydroxyfatty acids and esterified compounds such as ester waxes, sterol esters and alkylferulates strongly decreased after soda/AQ pulping while alkanes, alcohols, free sterols and sterol glycosides survived the cooking process. Among the lipophilic extractives that remained in the unbleached pulps, some amounts of free sterols were still present in the TCF pulps whereas they were practically absent in the ECF pulps. Sterol glycosides were also removed after both TCF and ECF bleaching. By contrast, saturated fatty acids, fatty alcohols and alkanes were still present in both bleached pulps.