Liquid Solid Extraction _top_ Jun 2026

Liquid-solid extraction remains a cornerstone of separation science. While traditional methods like Soxhlet extraction remain relevant for standardization and initial research, the industry is clearly shifting towards assisted extraction technologies (UAE and MAE) and green solvent systems.

– Used in food (oil extraction from seeds), pharmaceuticals (herbal extraction), mining (heap leaching of metals), and waste treatment. liquid solid extraction

Liquid-solid extraction (LSE) is a fundamental separation technique used to isolate soluble constituents from a solid matrix using a solvent. While the principle remains rooted in basic mass transfer and equilibrium thermodynamics, modern applications have evolved to prioritize efficiency, selectivity, and environmental sustainability. This paper provides a comprehensive review of LSE methodologies, ranging from conventional maceration and Soxhlet extraction to advanced techniques such as ultrasound-assisted extraction (UAE), microwave-assisted extraction (MAE), and supercritical fluid extraction (SFE). The underlying thermodynamic and kinetic mechanisms governing the extraction process are analyzed, with specific attention paid to the influence of solvent polarity, temperature, and particle size. Furthermore, the paper discusses current industrial applications in the pharmaceutical, food, and environmental sectors, highlighting the shift towards green chemistry principles in extraction technologies. solid-liquid ratio of 1:20

This paper presents an optimization study on the liquid-solid extraction of phenolic compounds from olive leaves using response surface methodology (RSM). The authors investigated the effects of solvent type, solid-liquid ratio, extraction temperature, and extraction time on the yield of phenolic compounds. The results showed that the optimal extraction conditions were: methanol as solvent, solid-liquid ratio of 1:20, extraction temperature of 60°C, and extraction time of 60 minutes. Under these conditions, the yield of phenolic compounds was 35.6 mg/g of dry olive leaves. extraction temperature of 60°C

Percolation involves the downward flow of solvent through a packed bed of solid material. It is widely used in the pharmaceutical industry for the preparation of tinctures and fluid extracts. It offers better solvent utilization than maceration but requires careful control of flow rates to ensure equilibrium is reached.