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method for sulfatentfernung in purified phosphoric acid by extraction

机译：萃取法纯化纯磷酸中硫酸铁的方法

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摘要

A process for removing sulfate ions from extracted phosphoric acid which is substantially free of metallic ion impurities and which has been prepared by extracting wet process phosphoric acid with an organic solvent which comprises:PPA. ADJUSTING THE EXTRACTED PHOSPHORIC ACID CONCENTRATION TO A CONCENTRATION GREATER THAN 70%; PPB. ADDING AN AMOUNT OF A BARIUM COMPOUND WHICH IS LESS THAN THE STOICHIOMETRIC EQUIVALENT AMOUNT OF BARIUM RELATIVE TO THE AMOUNT OF DISSOLVED SULFATE ION TO FORM BARIUM SULFATE CRYSTALS; ANDP PC. SEPARATING SAID BARIUM SULFATE FROM THE RESULTING SLURRY AT A TEMPERATURE LESS THAN 80° C and recovering purified, extracted phosphoric acid;PPWHEREIN THE AMOUNT OF BARIUM COMPOUND ADDED IS SUCH THAT SAID PURIFIED EXTRACTED PHOSPHORIC ACID CONTAINS AT LEAST 5 PPM OF SULFATE IONS.

机译：一种从萃取的磷酸中去除硫酸根离子的方法，该方法基本上不含金属离子杂质，并且已经通过用包含以下各项的有机溶剂萃取湿法磷酸来制备：P

A。将提取的磷酸浓度调整到大于70％的浓度;

B。相对于溶解的硫酸根离子形成的硫酸钡晶体，添加少于钡的化学计量当量的钡化合物; AND

C。在低于80°C的温度下从所产生的浆液中分离出硫酸钡，并回收纯化的提取的磷酸;

其中添加的钡化合物的量至少能纯化5ppm的萃取的磷酸。硫酸根离子展开▼

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公开/公告号DE2704545B2

专利类型
公开/公告日1979-05-10

原文格式PDF
申请/专利权人 TOYO SODA MANUFACTURING CO. LTD. SHIN-NANYO YAMAGUCHI (JAPAN);
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申请/专利号DE19772704545
发明设计人 HIRAGA YOICHI;KIKUCHI MITSUO;
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申请日1977-02-03
分类号C01B25/46;
国家 DE
入库时间 2022-08-22 19:51:13

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