The application belongs to the field of daily chemicals, and particularly relates to a preparation method of hydrogenated
castor seed oil and hair-care essence containing the hydrogenated
castor seed oil. The preparation method of the hydrogenated
castor seed oil comprises the following steps: S1. crushing castor seeds and sieving to obtain castor seed
powder; S2. treating the castor seed
powder in a low-frequency
pulse electric field and intermittent
microwave to obtain pretreated castor seed
powder; S3. mixing the pretreated castor seed powder with a composite
enzyme preparation and performing subcritical extraction to obtain an extraction liquid; S4. filtering and distilling the extraction liquid to obtain a refined filtrate; S5. mixing the refined filtrate with a
palladium-carbon catalyst to obtain a semi-finished product; and S6. passing the semi-finished product through a
fixed bed layer of special
activated carbon to obtain a first filtrate, and filtering the first filtrate to obtain the hydrogenated castor seed oil. The hydrogenated castor seed oil used in the application can achieve the effects of high
active ingredient retention rate and good
oxidation stability, and can lay a foundation for the
efficacy and safety of the hair-care essence prepared subsequently.