{
  "$type": "site.standard.document",
  "description": "The present invention pertains to a method for recovering a rare metal salt, the method comprising: an acid treatment step for obtaining a rare metal-containing acidic aqueous solution by putting a material containing monovalent and polyvalent rare metals in contact with an acid aqueous solution; a…",
  "path": "/patents/1402019",
  "publishedAt": "2025-10-08T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B01D61/02",
    "TORAY INDUSTRIES [JP]"
  ],
  "textContent": "The present invention pertains to a method for recovering a rare metal salt, the method comprising: an acid treatment step for obtaining a rare metal-containing acidic aqueous solution by putting a material containing monovalent and polyvalent rare metals in contact with an acid aqueous solution; a separation step for obtaining permeated water containing the monovalent rare metal and non-permeated water containing the polyvalent rare metal from the rare metal-containing acidic aqueous solution by using a nanofiltration membrane satisfying a specific condition (1); and a concentration step for obtaining non-permeated water having a higher concentration of the monovalent rare metal and permeated water having a lower concentration than the permeated water in the separation step, by using a reverse osmosis membrane.",
  "title": "METHOD FOR RECOVERING RARE METAL SALT"
}