리튬 화합물의 제조 방법
    1.
    发明申请
    리튬 화합물의 제조 방법 审中-公开
    生产锂化合物的方法

    公开(公告)号:WO2018070726A1

    公开(公告)日:2018-04-19

    申请号:PCT/KR2017/010979

    申请日:2017-09-29

    Abstract: 본 개시는, 리튬 화합물의 제조 방법에 대한 것으로, 인산 리튬을 준비하는 단계, 상기 인산 리튬과 황산을 혼합하여 혼합물을 수득하는 단계, 상기 혼합물 내 반응을 통해 상기 인산 리튬이 황산 리튬으로 전환되는 단계, 및 상기 황산 리튬을 고상으로 분리하는 단계를 포함하고, 상기 혼합물 내 반응을 통해 상기 인산 리튬이 황산 리튬으로 전환되는 단계에서, 상기 혼합물의 액상 내 인 (P) 및 황 (S)의 합계 농도가 ([P+S] mol/L) 5 mol/L 이상인 리튬 화합물의 제조 방법을 제공할 수 있다.

    Abstract translation: 本发明涉及一种制备锂化合物的方法,该方法包括以下步骤:制备磷酸锂,将磷酸锂和硫酸混合以获得混合物, 在步骤,其中锂过渡包括以下步骤将被转换成一个硫酸锂,和分离硫酸盐在固相中的锂,其中,所述磷酸盐从用硫酸和锂的反应混合物锂在液体状态下的(P)内的混合物的 硫(S)的总浓度为([P + S] mol / L)5mol / L以上。

    一种利用钛白废酸预处理磷矿的方法

    公开(公告)号:WO2013174063A1

    公开(公告)日:2013-11-28

    申请号:PCT/CN2012/078208

    申请日:2012-07-05

    CPC classification number: C01B25/222

    Abstract: 一种利用钛白废酸预处理磷矿的方法,包括将酸性溶液与固含量为75%以上的磷矿矿浆在反应槽中进行反应得到反应料浆,以及将反应料浆进行固液分离的工艺步骤,其中所述的酸性溶液由以下步骤制得:(1)将硫酸法钛白粉生产过程中的钛白废酸收集到废酸贮槽中,控制钛白废酸的硫酸质量百分含量为20-30%,硫酸亚铁的质量百分含量为10-14%;(2)将稀释水与钛白废酸按4-10:1的质量比混合稀释,控制硫酸质量百分含量在1-8%。该方法不仅脱镁率高,磷损失率低,而且解决了酸浓度波动对预处理pH值的影响。该方法适用于不同规模的湿法磷酸生产,生产效率高,运行成本低,经济实用。

    PROCESS FOR RECOVERING PHOSPHORIC ACID FROM SOLID PHOSPHORUS SOURCES

    公开(公告)号:WO2020169708A1

    公开(公告)日:2020-08-27

    申请号:PCT/EP2020/054433

    申请日:2020-02-20

    Abstract: The invention pertains to a process for preparing phosphoric acid from a solid phosphorus-containing material, comprising the steps of: - reacting a solid phosphorus-containing material with strong acid in an amount of 1.0-15 mole acid, calculated as protons, per mole of phosphorus (calculated as P) in the solid phosphorus-containing material in a monophasic reaction medium comprising an organic solvent, to form a solution of phosphoric acid in organic solvent and remaining solid material, - separating the solution of phosphoric acid in organic solvent from the remaining solid material. It has been found that phosphoric acid can be recovered from a solid phosphorus-containing material in high purity and efficiency via a solid-state rearrangement/elution process. The process according to the invention does not require the use of the large amounts of water required by the conventional dissolution/extraction processes known in the art. The solution of phosphoric acid in organic solvent can be used as a starting material for further processes.

    PRÉPARATION D'ACIDE PHOSPHORIQUE
    6.
    发明申请

    公开(公告)号:WO2019092380A1

    公开(公告)日:2019-05-16

    申请号:PCT/FR2018/052794

    申请日:2018-11-09

    Applicant: COATEX OCP SA

    Abstract: L'invention concerne une méthode de préparation industrielle de l'acide phosphorique à partir d'une suspension aqueuse comprenant de l'eau et des particules d'au moins un matériau phosphaté dispersées en présence d'au moins un additif de type polymère anionique. L'acide phosphorique est obtenu par traitement de cette suspension au moyen d'au moins un acide fort. Le polymère est obtenu par réaction de polymérisation d'au moins un acide choisi parmi l'acide acrylique, l'acide méthacrylique et leurs sels. L'invention concerne la mise en œuvre de ce polymère anionique ainsi que la méthode d'amélioration de la rhéologie de la suspension et de l'hydrodynamique du milieu réactionnel siège des réactions de fabrication d'acide phosphorique.

    MODIFICATION OF PRECIPITATE MORPHOLOGY AND SETTLING CHARACTERISTICS IN ACID CONDITIONS
    7.
    发明申请
    MODIFICATION OF PRECIPITATE MORPHOLOGY AND SETTLING CHARACTERISTICS IN ACID CONDITIONS 审中-公开
    酸性条件下降解形态和结实特性的修改

    公开(公告)号:WO2010080806A1

    公开(公告)日:2010-07-15

    申请号:PCT/US2010/020223

    申请日:2010-01-06

    CPC classification number: C01B25/22 C01B25/01 C01B25/222 C01B25/234 C01F11/46

    Abstract: The current invention relates to the modification of precipitate formed from an acidic slurry or solution resulting in decreased settling times and final solids bed volumes. The current invention uses an aqueous synthetic mixture comprising a phosphate, phosphonate, anionic polymer, anionic/cationic polymer blend or combinations thereof in the slurry and/or solution to improve clarification of the process stream. The claimed invention has a significant effect on precipitate morphology consequently improving settling characteristics and allowing for superior solid-liquid separation and process throughput.

    Abstract translation: 本发明涉及由酸性浆料或溶液形成的沉淀物的改性,导致沉降时间和最终固体床体积减少。 本发明使用包含磷酸盐,膦酸盐,阴离子聚合物,阴离子/阳离子聚合物共混物或其组合的水性合成混合物在浆料和/或溶液中以改善工艺流的澄清。 所要求保护的发明对沉淀物形态具有显着的影响,从而改善沉降特性并允许优异的固液分离和工艺生产量。

    PROCEDE INTEGRE DE DECADMIATION D'ACIDE PHOSPHORIQUE

    公开(公告)号:WO2022124875A1

    公开(公告)日:2022-06-16

    申请号:PCT/MA2021/050020

    申请日:2021-12-10

    Abstract: La présente invention concerne un procédé intégré de décadmiation d'acide phosphorique, comprenant : attaque (1) de phosphate (Ph) par de l'acide sulfurique (AS) dans un réacteur de sorte à préparer une solution d'acide phosphorique contenant du cadmium et du sulfate de calcium dihydrate ou hémihydrate; concentration (2) de ladite solution d'acide phosphorique, de sorte à former un acide phosphorique concentré (AP) présentant une teneur massique entre 42% et 61% en P2O5; ajout (3) d'acide sulfurique (AS) pour ajuster la teneur en sulfate libre, de l'anhydrite étant formé par recristallisation du sulfate de calcium dihydrate et hémihydrate, le cadmium co-cristallisant avec ledit anhydrite, de sorte à obtenir de l'acide phosphorique décadmié et des boues d'anhydrites riches en cadmium; - désulfatation (4) de l'acide phosphorique décadmié; désursaturation (5) et clarification (6) par décantation du mélange d'acide phosphorique décadmié et des boues; conditionnement (7) desdites boues (PS1) avec une solution d'acide phosphorique (APd) présentant un titre massique inférieur ou égal à 61% en P2O5; recyclage des boues conditionnées (PS2) dans l'étape (1) d'attaque du phosphate.

    SELECTIVE PHOSPHATE EXTRACTION
    9.
    发明申请

    公开(公告)号:WO2022098241A1

    公开(公告)日:2022-05-12

    申请号:PCT/NL2021/050686

    申请日:2021-11-09

    Applicant: SUSPHOS B.V.

    Abstract: The invention relates to a process for the production of phosphoric acid, phosphoric acid obtainable by the process, the production of ammonium phosphate salts, and to the use of ammonium salts. A process for the production of phosphoric acid, comprising: i) reacting a phosphorus-containing material with an acid, without organic solvent, thereby forming a reaction mixture comprising phosphoric acid, wherein said acid has a pKa of 3.5 or lower, and ii) extracting phosphoric acid from the reaction mixture by adding organic solvent to the reaction mixture, thereby forming a phosphoric acid solution, wherein 20 wt.% or less of free water is added to the reaction mixture, based on the total weight of the reaction mixture, and the phosphorus-containing material comprises secondary raw material comprising phosphate.

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