CN1041077C - 一种磷酸铁粉末的制作方法 - Google Patents

一种磷酸铁粉末的制作方法 Download PDF

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CN1041077C
CN1041077C CN93115914A CN93115914A CN1041077C CN 1041077 C CN1041077 C CN 1041077C CN 93115914 A CN93115914 A CN 93115914A CN 93115914 A CN93115914 A CN 93115914A CN 1041077 C CN1041077 C CN 1041077C
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aqueous solution
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phosphate powder
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董国兴
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Abstract

一种磷酸铁粉末的制作方法,其特征在于(1)取三氯化铁和磷酸钠的摩尔比为FeCl3∶Na3PO4=1∶(1.05~1.10),(2)将FeCl3和Na3PO4分别配制成15~20%和10~15%的水溶液;(3)将两种水溶液混合在空温下生成悬浊液:FeCl3+Na3PO4=FePO4↓+3NaCl其pH=7;(4)将悬浊液用二倍的清水浸泡,静置淀沉降,抽去上清液,再用二倍的清水浸泡静置,如此重复三次以上;(5)将FePO4过滤得滤饼、干燥、粉碎后即得成品。其优点是:成本低、适用面广,纯度高且为中性。

Description

一种磷酸铁粉末的制作方法
本发明涉及一种磷酸铁粉未的制作方法。
目前市场所售磷酸铁产品,成本高、售价高、纯度并不高,亦非中性,很可能因其PH值而影响使用效果。
本发明的目的在于提供一种纯度高,制造方法简便的磷酸铁粉未的制作方法。
本发明的技术方案在于:
一种磷酸铁粉未的制作方法,其特征在于:(1)取三氯化铁(FecL3)和磷酸钠(Na3PO4)摩尔比为Fecl3∶Na3PO4=1∶(1.05~1.10);(2)取上述比例的Fecl3和Na3PO4,其中将Fecl3置于反应器1中,用水配制成15~20%浓度的水溶液;将Na3PO4置于反应器2中,配制成10~15%浓渡的水溶液;(3)搅拌反应器1中的Fecl3水溶液,并缓缓注入反应器2中的Na3PO4水溶液,在室温下反应生成悬浊液,用5%的Na3PO4溶液控制悬浊液的PH=7。
,其离子反应式为:
将生成的悬浮液用二倍的清水浸泡、静置、沉淀沉降、抽去上清液,再用二倍的清水浸泡,如此重复三次以上;(5)将沉淀物过滤得饼、经干燥、粉碎后即成此中性磷酸铁粉未成品。
本发明的效果在于:产品为中性、纯度高,制作成本低,适用面广;(2)产品制作工艺简便,常温下制作,无需特殊设备;(3)产品易于存放。
实施例一:
化学纯试剂FeCl3.6H2O固体270g,置于玻璃搅拌反应器中,加去离子水550mL,全部溶解后,将化学纯试剂Na3PO4·18H2O固体490g在另一玻璃容器中用去离子水溶解成室温下饱和溶液,在搅拌下30分钟内将Na3PO4溶液均匀加入FeCl3溶液中,反应混合物由深棕变为浅棕,最后呈淡黄悬浊液,PH=4.8~6.5,用另配5%的Na3PO4溶液将此悬浊液中和到PH=7.0。之后,将此悬浊液搅拌一小时后,停止搅拌,用二倍悬浊液体积的去离子水洗涤,静置5小时,发生沉降,抽去上清液,再用二倍沉淀体积的去离子水洗涤、静置、沉降,再抽去上清液,如此反复三次,将悬浊液离心过滤,滤饼于t=120±2℃鼓风干燥至恒重,将固体研磨过40目筛,得本发明技术生产的中性磷酸铁粉未260g(淡黄色)。
实施例二:
化学纯试剂Fe(OH)3107g,与足量的化学纯试剂盐酸加热反应得深棕色FeCL3液体410g,加去离子水410mL稀释后加入玻璃搅拌反应器中,另容器制备含试剂Na3PO4·18H2O,490g的饱和溶液(室温t=17℃),搅拌下于30分钟内将Na3PO4溶液均匀倒入FeCL3溶液中,反应混合物由深棕变浅棕,最后成淡黄色悬浊液,PH=5.0;用另外容器中配制的5%浓度Na3PO4溶液将此悬浊液中和到PH=7.0,搅拌一小时后,重复实施例一的洗涤、静置、沉降步骤,以及实施例一的过滤干燥步骤,研磨过筛得到淡黄色的本技术制造的中性磷酸铁粉未263g。
实施例三:
大连氯酸钾厂制的工业液体三氯化铁(FecL3≥40%,不含有零杂质)300mL,置于玻璃搅拌反应器中,加水410mL稀释,另容器制备食品级Na3PO4·18H2O(大连金光化工厂制500g(纯度>99%)的饱和溶液(t=17℃),重复上二例同样制备步骤得到本发明的中性磷酸铁粉未267g。
实施例四:
实施例三中的工业三氯化铁液体(≥40%浓度)1000mL加1400mL自来水稀释后置于搅拌反应器中,另容器将实施例三所用的磷酸三钠1800g制成室温下饱和溶液,在搅拌下于一小时之间将磷酸三钠溶液均匀倒入反应器中,反应现象同上述三例,重复上述三例的中和、洗涤、静置、沉降、过滤、干燥、研磨、筛分步骤后得到本发明制出的中性磷酸铁粉未871g。

Claims (2)

1、一种磷酸铁粉未的制作方法,其特征在于:
(1)取三氯化铁(Fecl3)和磷酸钠(Na3PO4)摩尔比为FecL3∶Na3PO4=1∶(1.05~1.10);
(2)将FecL3置于反应器1中,配制成浓度为15~20%的FecL3水溶液;将Na3PO4置于反应器2中,配成浓度为10%~15%的水溶液;
(3)搅拌反应器1中的FecL3水溶液,并缓缓注入反应器2中的Na3PO4水溶液,在室温下反应生成悬浊液;
其离子反应式为:
此时用PH试纸测定悬浊液的PH值,应控制为中性PH=7;
(4)将此悬浊液用二倍清水浸泡、静置、沉淀沉降,抽去上清液,再用二倍的清水浸泡、静置,如此重复三次以上;
(5)将沉淀物FePO4过滤得滤饼,干燥、粉碎后即得中性磷酸铁粉未成品。
2、如权利要求1所述的一种磷酸铁粉未的制作方法,其特征在于所说的反应后的悬浊液的PH值,如果PH小于7,用事先配制好的5%的Na3PO4水溶液仔细滴定至PH=7。
CN93115914A 1993-11-18 1993-11-18 一种磷酸铁粉末的制作方法 Expired - Fee Related CN1041077C (zh)

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CN100540464C (zh) * 2007-10-12 2009-09-16 杭州电子科技大学 一种磷酸铁的制备方法
TWI466370B (zh) 2008-01-17 2014-12-21 A123 Systems Inc 鋰離子電池的混合式金屬橄欖石電極材料
WO2011025823A1 (en) 2009-08-25 2011-03-03 A123 Systems, Inc. Mixed metal olivine electrode materials for lithium ion batteries having improved specific capacity and energy density
US9660267B2 (en) 2009-09-18 2017-05-23 A123 Systems, LLC High power electrode materials
WO2011035235A1 (en) 2009-09-18 2011-03-24 A123 Systems, Inc. Ferric phosphate and methods of preparation thereof
CN105800578B (zh) * 2016-03-02 2018-04-24 杨第伦 气泡液膜法生产超微、纳米磷酸铁的方法

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全国化工产品目录(上) 1986.10.1 《全中化工产品目录》编辑部编化工部科技情报研究所出版 *

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