This contribution compares the supercritical (SC) CO₂ extraction of astaxanthin from disrupted Haematococcus pluvialis cysts in either an aqueous suspension or packed bed of dry powder at 40 or 70 ºC and 35–55 MPa. The initial stage of the process for aqueous suspensions consisted of a solubility-controlled removal of water that delays oleoresin extraction in comparison to the dry substrate. In addition, residual water in the partially dried suspension made oleoresin extraction slower than from the dry substrate. However, the presence of water in an aqueous suspension surprisingly made the oleoresin extraction more sensitive to temperature in comparison to dry powder, affecting the selectivity of the extraction for astaxanthin in a large extend.

该贡献比较了在 40 或 70 ºC 和 35–55 MPa 的水悬浮液或干粉填充床中，从破碎的雨生红球藻胞囊中提取虾青素的超临界 (SC) CO ₂提取。水悬浮液过程的初始阶段包括溶解度控制的水去除，与干基质相比，延迟了油树脂的提取。此外，部分干燥的悬浮液中的残留水使油树脂的提取比从干燥的基质中提取的速度慢。然而，与干粉相比，水悬浮液中水的存在出人意料地使油树脂提取对温度更敏感，在很大程度上影响了提取虾青素的选择性。