Comprehensive utilization method of peony shells

[0031] Extracting peony oil from peony shells includes the following steps:

[0032] a. Peony shells are crushed to 40-100 mesh with a pulverizer, and the extraction kettle is installed;

[0033] b. Use food grade CO 2 , set the extraction pressure to 20-45MPa, the temperature to 25-50°C, the separator conditions are: separator I pressure 10KPa, temperature 50°C, separator II pressure 4KPa, temperature 40°C, extraction time 0.5-4 hours.

[0034] c. After the extraction is completed, collect the extract to obtain the peony oil, and leave the residue after the extraction of the peony oil for future use.

[0035] food grade CO 2 The purity is 99.99%, and the flow rate is 12-18L / hour.

[0036] In step b above, use food grade CO 2 , the extraction pressure is set to 30MPa, the temperature is 40°C, the separator conditions are: the pressure of separator I is 10KPa, the temperature is 50°C, the pressure of separator II is 4KPa, the temperature is 40°C, and the extraction time is ...

[0038] Using the peony shell residue after extracting peony oil in step c of Example 1 as raw material to extract melanin, the steps are as follows:

[0039] Grinding the peony shell residue after extracting peony oil in step c to 100-200 mesh, and placing it in an airtight container;

[0040] Pour 95% ethanol into an airtight container and soak for 24 hours;

[0041] Pour out the solution, then soak in 95% ethanol for 6 hours, repeat 2 times;

[0042] Finally, all the solutions are mixed, filtered, distilled, and ethanol is recovered, and the remaining obtained is a dye solution containing melanin.

[0044] Using the peony shell residue after extracting the peony oil in step c of Example 1 as raw material, extracting lignans includes the following steps:

[0045] a. Preparing the alcohol-water extract: crushing the peony shell residue that has been extracted from the peony oil in step c and adding it to the fatty acid alcohol aqueous solution, stirring and extracting at room temperature, filtering, and evaporating the filtrate to remove the solvent to obtain the extract;

[0046] b. Preparation of hydrolyzate aqueous solution: add the extract to alkaline aqueous solution, stir and hydrolyze at room temperature to obtain a hydrolyzate solution;

[0047] c. Separation of lignans: extracting and separating the hydrolyzate with an organic solvent to obtain a crude aqueous solution of lignans;

[0048] d. Purification of lignans: adding alcohol to the separated aqueous solution of crude lignans, absorbing them with silica gel, and hydrolyzing and adsorbing them with alcohol con...