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| Preparation of cosmetic-grade granular lanolin alcohol |
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| DOI： |
| KeyWord:lanolin alcohol cosmetic-grade granular molecular distillation |
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| Abstract: |
| With industrial-grade lanolin alcohol as raw material, the cosmetic-grade granular lanolin alcohol was prepared by two-stage molecular distillation and granulation process, and the process conditions were optimized. The resuls showed that cosmetic-grade lanolin alcohol was obtained by two-stage molecular distillation under the conditions of vacuum degree 10 Pa, first molecular distillation temperature 200 ℃, second molecular distillation temperature 240 ℃, feeding rate 400 mL/h and film scraping speed 20 r/min. Then, cosmetic-grade granular lanolin alcohol was obtained by granulation process under the conditions of ambient temperature 10 ℃, ambient humidity 20% and feeding temperature 60 ℃. Under these conditions, the product total yield reached 91.46%, and the primary qualification rate was 97.85%. The acid value and saponification value conformed to the European Pharmacopoeia and the United States Pharmacopoeia. |
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