Method for the production of rare earth containing phosphates
    6.
    发明授权
    Method for the production of rare earth containing phosphates 有权
    生产含稀土磷酸盐的方法

    公开(公告)号:US08545784B2

    公开(公告)日:2013-10-01

    申请号:US11551381

    申请日:2006-10-20

    CPC classification number: C09K11/7777 C01B25/26

    Abstract: A method for the synthesis of rare earth containing phosphates of the LaPO4:Ce,Tb type comprising providing an initial charge of phosphate having a pH above 2 to a reactor; subsequently commencing introduction of a rare earth solution to the reactor, and subsequently, continuing to introduce both the phosphate and the rare earth solution to the reactor to form a mixture; whereby a rare earth phosphate precipitate is produced, at least a portion of which is precipitated while the pH of the mixture is less than 2.

    Abstract translation: 一种用于合成LaPO 4:Ce,Tb型稀土含磷酸盐的方法,包括向反应器提供pH高于2的磷酸盐的初始电荷; 随后开始向反应器中引入稀土溶液,随后继续向反应器中引入磷酸盐和稀土溶液以形成混合物; 由此产生稀土磷酸盐沉淀物,其中至少一部分沉淀,同时混合物的pH小于2。

    PHOSPHATE RECOVERY FROM SLUDGE
    8.
    发明申请
    PHOSPHATE RECOVERY FROM SLUDGE 有权
    磷酸盐从泥沙中恢复

    公开(公告)号:US20120070360A1

    公开(公告)日:2012-03-22

    申请号:US13318228

    申请日:2010-04-30

    Abstract: A process for recovering reusable materials, in particular phosphate, from sewage sludge products, namely sewage sludge, sewage sludge ash or sewage sludge slag, by extraction, in which a suspension of the sewage sludge product is produced in water, alcohol, water-alcohol mixture or an aqueous solution, gaseous carbon dioxide (CO2) or supercritical carbon dioxide (scCO2) is introduced as an extraction agent into the suspension of the sewage sludge product, undissolved solids are separated from the liquid suspension agent, carbon dioxide is removed from the suspension agent, and reusable materials dissolved in the suspension agent are precipitated and separated from the suspension agent.

    Abstract translation: 通过提取从污水污泥产品即污水污泥,污水泥灰或污泥渣中回收可再利用材料,特别是磷酸盐的方法,其中在水,醇,水 - 醇中产生污泥产物的悬浮液 将混合物或水溶液,气态二氧化碳(CO 2)或超临界二氧化碳(scCO2)作为萃取剂引入到污水污泥产物的悬浮液中,将未溶解的固体与液体悬浮剂分离,将二氧化碳从 溶解在悬浮剂中的悬浮剂和可重复使用的材料沉淀并与悬浮剂分离。

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