玫瑰精油的提取方法有蒸餾法、冷吸法、亞臨界萃取法等，蒸餾法因加工溫度高，組分變性及輕組分損失，精油的氣味會發(fā)生變化，不夠純正，冷吸法效率低、成本高，目前應用較少。

亞臨界低溫萃取技術可以提取玫瑰鮮花和干花中的精油成分，其低溫萃取的特性，使揮發(fā)性精油成分損失小，熱敏性成分基本不變性，生產(chǎn)規(guī)模達到每天30t鮮花。亞臨界萃取得到的產(chǎn)品為淡黃色浸膏，經(jīng)過脫蠟或分子蒸餾處理可進一步得到精油。

Subcritical Extraction for Rose Essential Oil

The extraction methods for rose essential oil include distillation, enfleurage (cold absorption), and subcritical extraction, among others.

Distillation: Due to its high processing temperature, distillation causes component denaturation and the loss of volatile compounds. This alters the oil's aroma, resulting in a product that lacks purity.

Enfleurage (Cold Absorption): This method suffers from low efficiency and high costs, making it less commonly used nowadays.

Subcritical Low-Temperature Extraction: This technology can extract essential oil components from both fresh and dried rose flowers. Its low-temperature extraction characteristic minimizes the loss of volatile oil constituents, and thermosensitive components largely retain their original state. The production scale reaches a daily processing capacity of 30 metric tons of fresh flowers. The product obtained through subcritical extraction is a pale yellow, wax-containing extract. This extract can be further processed via dewaxing or molecular distillation to yield the essential oil.