| 摘要 |
PROBLEM TO BE SOLVED: To provide a production method of purified white vaseline having excellent light stability and increased safety to the skin. SOLUTION: The white vaseline is hydrogenated in the presence of a group VIII metal catalyst under conditions of 170-250°C and 6-30 MPa to have≤0.25 ultraviolet absorbance (value of 1 w/v% isooctane solution and 1 cm optical path length) at 275 nm. COPYRIGHT: (C)2008,JPO&INPIT
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