[Study on extraction of shikimic acid from pine needles of Pinus elliottii by decompressing inner ebullition]

We studied the extracting process of shikimic acid from pine needles of Pinus elliottii Engelm, using pine needles of Pinus elliottii Engelm as raw materials, a high concentration of alcohol as the desorption and a low concentration of alcohol as the hot-extraction, and the decompressing inner ebullition method. Through the single factor test and orthogonal test, the best processing of the decompressing inner ebullition was as follows: when the concentration of alcohol was 70 percent with 18 minutes' desorption, the temperature of hot-extraction was 65 degrees C with 4 minutes' hot-extraction, solid-liquid ratio was 1:1.6 with 260 mL of hot-extraction, with a concentration of 30%. The extracting effect was the best when extracted twice. The extracting proportion of shikimic acid from dry pine needles of Pinus elliottii was 1.51%.