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gshg112709金蟲 (小有名氣)
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| 以固廢磷化渣和NaOH為原料制得Na3PO4，采用化學(xué)沉淀法將Na3PO4溶液滴加到Ca(OH)2溶液中反應(yīng)制備出羥基磷灰石，再將羥基磷灰石與硫酸反應(yīng)制備磷酸。考察了溫度、NaOH濃度制備Na3PO4時對磷化渣中磷酸根的提取率的影響，確定了最佳條件為：在110℃質(zhì)量分數(shù)為30%NaOH溶液條件下磷酸根的提取率為91.45%。同時考察了溫度、液固比、酸過量系數(shù)、時間等因數(shù)制備磷酸對羥基磷灰石中磷酸根的轉(zhuǎn)化率的影響，確定最佳工藝參數(shù)。實驗結(jié)果表明：在反應(yīng)溫度75+3℃，酸過量系數(shù)1.02，液固比為2.5:1，反應(yīng)時間3h條件下，磷酸根的轉(zhuǎn)化率可達96.69%。 |
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izhangxing
新蟲 (正式寫手)
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- 注冊: 2010-03-07
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- 專業(yè): 電化學(xué)
★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★
wypward(金幣+1):謝謝參與 2010-09-15 12:12:58
ringzhu(金幣+10, 翻譯EPI+1):辛苦 歡迎常來翻譯版~~ 2010-11-22 13:05:24
wypward(金幣+1):謝謝參與 2010-09-15 12:12:58
ringzhu(金幣+10, 翻譯EPI+1):辛苦 歡迎常來翻譯版~~ 2010-11-22 13:05:24
| With the solid waste of phosphate slag and NaOH as raw material Na3PO4, by chemical precipitation method for spot Na3PO4 solution to the CaOH2 solution preparation of hydroxyapatite and preparation of hydroxyapatite and sulfuric acid reaction. Study on Temperature and NaOH concentration of preparation Na3PO4時 on the influence of phosphate residue of phosphate by extraction rate and determine the best condition is : In the second ℃ quality score of 110 NaOH solution under the condition of phosphate by Extraction Rate of 91.45. Study on the temperature at the same time, liquid and solid acid excess coefficient, time and other factors in the preparation of hydroxyapatite influence of phosphate conversion to determine the optimum technological parameters. Experimental results show that in reaction temperature of 75 - 3 ℃ acid excess coefficient of 1.02, liquid and solid than 2.5:1, reaction time 3h under the condition of phosphate conversion rate will reach 96.69. |
2樓2010-09-14 22:06:55
Meteor_Dzz
銀蟲 (小有名氣)
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wypward(金幣+1):謝謝參與 2010-09-16 13:11:05
發(fā)芽土豆(金幣-3):機器翻譯 2010-09-18 14:16:29
wypward(金幣+1):謝謝參與 2010-09-16 13:11:05
發(fā)芽土豆(金幣-3):機器翻譯 2010-09-18 14:16:29
| To solid waste phosphate sludge and NaOH as raw materials obtained Na3PO4, by chemical precipitation method Na3PO4 solution was dropwise added Ca (OH) 2 solution prepared in response to hydroxyapatite, and then prepared by the reaction of hydroxyapatite with phosphoric acid . The effects of temperature, NaOH concentration of phosphate when preparation Na3PO4 phosphate residue extraction rate, the optimum conditions: 110 ℃ in the mass fraction of 30% NaOH solution under the conditions of phosphate extraction was 91.45%. While of temperature, liquid ratio, acid excess factor, time factor in the preparation of phosphoric acid on phosphate hydroxyapatite conversion rate, to determine the optimum process parameters. The results showed that: the reaction temperature 75 +3 ℃, acid excess coefficient of 1.02, liquid to solid ratio of 2.5:1, anti- |
3樓2010-09-16 02:23:22
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