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    Method of purifying phosphoric acid
    26.
    发明授权
    Method of purifying phosphoric acid 有权

    公开(公告)号：US10189710B2

    公开(公告)日：2019-01-29

    申请号：US15110745

    申请日：2015-01-18

    申请人： BATEMAN ADVANCED TECHNOLOGIES LTD.

    发明人： Jonathan Lipp

    IPC分类号： C01B25/237 ,  C01B25/234

    摘要： A method of purifying phosphoric acid solution produced in wet process using nanofiltration. The claimed method contains the following: (a) providing wet phosphoric feed (b) subjecting the said feed to a first nanofilter (c) produce sulfate solids (d) removing the solids (e) subjecting a second nanofilter.

    Manufacture of sodium tripolyphosphate from wet acid
    28.
    发明授权
    Manufacture of sodium tripolyphosphate from wet acid 失效
    从湿酸制造三聚磷酸钠

    公开(公告)号：US4676963A

    公开(公告)日：1987-06-30

    申请号：US861163

    申请日：1986-05-09

    申请人： Nirmal K. Khanna

    发明人： Nirmal K. Khanna

    IPC分类号： C01B25/237 ,  C01B25/41 ,  C01B15/16 ,  C01B25/235 ,  C01B25/46

    CPC分类号： C01B25/416 ,  C01B25/2375

    摘要： A process is described for converting wet acid into sodium tripolyphosphate by pretreating the wet acid in a pretreatment stage with a sodium source and SiO.sub.2 to precipitate fluoride values from the wet acid, solvent extracting the pretreated wet acid to remove further impurities, reacting the solvent extracted acid with a sodium source in a made up stage to form a sodium orthophosphate liquor, heating the resulting liquor in a calcining stage to produce sodium tripolyphosphate, passing gases from the calcining stage into a scrubber liquor to remove fluoride impurities and entrained sodium tripolyphosphate, recycling scrubber liquor to the make up stage to recover sodium tripolyphosphate values, and removing a bleed stream from the recycled scrubber liquor and recycling it to the pretreatment stage to remove fluoride impurities therein in the pretreatment stage.

    摘要翻译： 描述了一种通过用钠源和SiO 2在预处理阶段预处理湿酸来将湿酸转化成三聚磷酸钠的方法，以从湿酸中沉淀氟化物值，溶剂萃取预处理的湿酸以除去进一步的杂质，使萃取的溶剂反应 酸与钠源形成正磷酸钠溶液，在煅烧阶段加热所得液体以产生三聚磷酸钠，将气体从煅烧阶段送入洗涤液以除去氟化物杂质和夹带的三聚磷酸钠，再循环 洗涤液至补充阶段以回收三聚磷酸钠值，并从再循环的洗涤液中除去排出的流，并在预处理阶段将其再循环到预处理阶段以除去其中的氟化物杂质。

    Process for removing fluorine and organic compounds from prepurified wet processed phosphoric acid
    29.
    发明授权
    Process for removing fluorine and organic compounds from prepurified wet processed phosphoric acid 失效
    从预纯化湿法磷酸中除去氟和有机化合物的方法

    公开(公告)号：US4539192A

    公开(公告)日：1985-09-03

    申请号：US625456

    申请日：1984-06-28

    申请人： Gunther Schimmel ,  Reinhard Gradl ,  Gero Heymer

    发明人： Gunther Schimmel ,  Reinhard Gradl ,  Gero Heymer

    IPC分类号： C01B25/234 ,  C01B25/237 ,  C01B25/46 ,  C01B25/16

    CPC分类号： C01B25/461 ,  C01B25/237

    摘要： The disclosure provides for phosphoric acid to be freed in a single process stage from fluorine and organic contaminants. To this end, the disclosure provides for the acid to be introduced into the upper portion of a closed structural element, for it to be treated therein at elevated temperature and pressure with steam flowing countercurrently to the acid, and for the acid so treated to be reacted in the lower portion of the structural element with hydrogen peroxide. The disclosure also provides an apparatus for carrying out the process.

    摘要翻译： 本公开提供在单一工艺阶段中从氟和有机污染物中释放的磷酸。 为此，本公开提供了将酸引入封闭结构元件的上部，以使其在升高的温度和压力下被处理，其中蒸汽与酸反向流动，并且对于被酸处理的酸 在结构元件的下部与过氧化氢反应。 本公开还提供了一种用于执行该过程的装置。