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孤獨的永恒金蟲 (初入文壇)
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Effect of reaction temperature on reduction of chroma value of ZSO Some ZSO was weighed, added into 2.5% peroxide, and mixed round for 1h on the temperature of 20°C, 40°C, 70°C, 90°C, 110°C. The results were displayed in Figure 2. Advanced Materials Research Vol. 460 The chroma value was reducing with the temperature increasing until the temperature was to 90°C, as shown in Figure 2. The decoloration was most remarkable on the temperature 90°C. With the temperature increasing continually, the chroma value was enhanced. It was because of the peroxide analyzed in the higher temperature. Accordingly, the oxidation function of peroxide was played down, and some substance of the oil sample was carbonized with temperature increasing. That was all the cause for color deepened of ZSO. Effect of reaction time on reduction of chroma value of ZSO Some ZSO was weighed, added into 2.5% peroxide, and mixed round for 10min, 30min, 1h,1.5h and 2h on the temperature of 90°C. The results were revealed in Figure 3. The Figure 3 showed the chroma value of ZSO can be fallen to the lowest when the reaction time was for 1h. If the reaction time is less than 1h, the oxidation will be not enough. However, when the reaction time is more than 1h, the oxidation nearly stopped, which lead to the color rebounded a little and viscosity increased. Orthogonal test Based on single factor experiment, the orthogonal test was adopted to review on the influencing factor, such as peroxide content, reaction temperature and reaction time. The experimental factor and level were show in Table 1. |
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danielaiyao
木蟲 (小有名氣)
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【答案】應(yīng)助回帖
★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★
孤獨的永恒: 金幣+40, 翻譯EPI+1, ★★★很有幫助 2013-05-07 13:13:06
孤獨的永恒: 金幣+40, 翻譯EPI+1, ★★★很有幫助 2013-05-07 13:13:06
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反應(yīng)溫度對ZSO色度值降低的影響 稱量一些ZSO，然后加入2.5%的NaOH，并分別在20°C, 40°C, 70°C, 90°C, 110°C攪拌一個小時。結(jié)果如表2. 色度值隨著溫度的增加而減少，直到90℃，如表2. 最值得注意的是90℃的漂白。隨著溫度的持續(xù)增加，色度值也在提高。這是由于是在較高的溫度下分析NaOH的。因此，NaOH的氧化作用在減弱，并且隨著溫度的升高，油樣中有一些物質(zhì)被碳化。這是ZSO顏色加深的所有原因。 反應(yīng)時間對ZSO色度值降低的影響 稱量適量ZSO，然后加入2.5%的NaOH，在90℃下分別攪拌10分鐘，30分鐘，1小時，1.5小時，2小時。結(jié)果如表3.表3顯示了在1小時時，ZSO的色度值降到最低。如果反應(yīng)時間小于1小時，氧化不充分。然而，當(dāng)反應(yīng)時間超過1小時，氧化近乎停止，這將導(dǎo)致顏色反彈一點，粘度增大。 正交實驗 基于以上單因素實驗，正交實驗采取回顧其影響因素，如NaOH含量，反應(yīng)溫度和反應(yīng)時間等。實驗因素和標(biāo)準(zhǔn)都在表1中顯示。 |
2樓2013-05-06 23:01:53
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3樓2013-05-06 23:32:21
孤獨的永恒
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- 專業(yè): 食品科學(xué)基礎(chǔ)
4樓2013-05-07 13:24:01
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