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gshg112709金虫 (小有名气)
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| 以固废磷化渣和NaOH为原料制得Na3PO4，采用化学沉淀法将Na3PO4溶液滴加到Ca(OH)2溶液中反应制备出羟基磷灰石，再将羟基磷灰石与硫酸反应制备磷酸。考察了温度、NaOH浓度制备Na3PO4时对磷化渣中磷酸根的提取率的影响，确定了最佳条件为：在110℃质量分数为30%NaOH溶液条件下磷酸根的提取率为91.45%。同时考察了温度、液固比、酸过量系数、时间等因数制备磷酸对羟基磷灰石中磷酸根的转化率的影响，确定最佳工艺参数。实验结果表明：在反应温度75+3℃，酸过量系数1.02，液固比为2.5:1，反应时间3h条件下，磷酸根的转化率可达96.69%。 |
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Meteor_Dzz
银虫 (小有名气)
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wypward(金币+1):谢谢参与 2010-09-16 13:11:05
发芽土豆(金币-3):机器翻译 2010-09-18 14:16:29
wypward(金币+1):谢谢参与 2010-09-16 13:11:05
发芽土豆(金币-3):机器翻译 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楼2010-09-16 02:23:22
izhangxing
新虫 (正式写手)
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wypward(金币+1):谢谢参与 2010-09-15 12:12:58
ringzhu(金币+10, 翻译EPI+1):辛苦 欢迎常来翻译版~~ 2010-11-22 13:05:24
wypward(金币+1):谢谢参与 2010-09-15 12:12:58
ringzhu(金币+10, 翻译EPI+1):辛苦 欢迎常来翻译版~~ 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时 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楼2010-09-14 22:06:55
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