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頁籤選單縮合
題名 | 廢白土經灰化處理後的再生利用=Regeneration of Spent bleaching Earth by Ashing Treatment |
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作者 | 江文德; 朱燕華; | 書刊名 | 食品科學 |
卷期 | 23:3 1996.06[民85.06] |
頁次 | 頁395-402 |
分類號 | 466.1 |
關鍵詞 | 正己烷萃取; 熱水萃取; 灰化處理; 再生效率; 再生白土; Hexane extraction; Hot water extraction; Ashing treatment; Regeneration efficiency; Regenerated spent bleaching earth; |
語文 | 中文(Chinese) |
中文摘要 | 本研究分別利用熱水(93℃)和正己烷等萃取方法回收廢白土中的油脂,其中以正己烷在室溫下所回收的油脂品質最佳,這兩種方法均可將廢白土的殘留油脂含量從21.3%降低至5%以下。這些去油廢白土再經750℃、0.5~16小時的灰化再一處理試驗後得知:經2小時後灰化所得之再生白土,其再生效率趨於平衡,平均可達92±1%;以2小時的再生處理最具有經濟效益。將去油廢白土利用750℃灰化2小時的循環再生處理試驗後得知,經第六次循環再生後所得的再崇白土仍具有84%的再生效率。因此這些再生白土當可取代一些活性白土,有效的重覆利用在油脂的脫色。 |
英文摘要 | Hot water (93℃) and hexane extraction methods were used to recover oil from spent bleaching earth (SBE), respectively. The quality of recovered oil from hexane extraction was better than that from hot water extraction, especially when the former extraction was conducted under room temperature. Both methods could reduce the residual oil in SBE from 21.3% to below 5%. The deoiled SBE was further regenerated by ashing at 750℃ for 0.5~16 hr. The results indicated that the regeneration efficiency (RE) of regenerated SBE reached an equilibrium after 2 hr of ashing treatment. The average RE was 92±1%. For economic reason, regeneration of SBE using 2 hr of ashing would be most desirable for institutional purposes. Moreover, under the condition of repeating the 2 hr ashing treatment at 750℃, the regenerated SBE obtained after 6 cycles of regeneration still remained at 84% RE. Therefore, the regeneration of deoiled SBE by using ashing treatment was feasible for oil processing, and the resultant clay could be effectively used as a substitute for activated clay in oil bleaching. |
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