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METHOD FOR PRODUCING LIQUID FERTILIZER

外国特許コード F200010211
整理番号 (S2019-0003-N0)
掲載日 2020年8月4日
出願国 世界知的所有権機関(WIPO)
国際出願番号 2019JP044961
国際公開番号 WO 2020101031
国際出願日 令和元年11月15日(2019.11.15)
国際公開日 令和2年5月22日(2020.5.22)
優先権データ
  • 特願2018-215968 (2018.11.16) JP
発明の名称 (英語) METHOD FOR PRODUCING LIQUID FERTILIZER
発明の概要(英語) This method for producing a liquid fertilizer produces a liquid fertilizer in which phosphorus is dissolved, and this method for producing a liquid fertilizer is characterized by comprising: a first dissolution step wherein an acidic liquid and an object to be processed containing phosphorus and a heavy metal are mixed with each other, thereby having the phosphorus and the heavy metal contained in the object to be processed dissolved; a first solid-liquid separation step wherein a first liquid in which the phosphorus and the heavy metal are dissolved is separated from the solid contents; and a heavy metal removal step wherein the heavy metal is removed from the first liquid. Consequently, the present invention is able to provide a method for producing a liquid fertilizer, by which a liquid fertilizer that contains phosphorus, while having a low heavy metal content, is able to be efficiently produced at low cost.
従来技術、競合技術の概要(英語) BACKGROUND ART
In the house of the plant cultivation or the like, phosphorus-containing liquid fertilizer is widely used. Such a liquid fertilizer, typically, a plurality of types of high-purity compound at a predetermined ratio is prepared by mixing (for example, see Patent Document 1).
On the other hand, in the ash sludge, a relatively high content of phosphorus is contained, its effective use is demanded. However, the sludge ash, together with the phosphorous, Ni, As, Cd, a relatively high content of heavy metals such as Pb and included, such as liquid fertilizer and it is difficult to effectively be utilized.
  • 出願人(英語)
  • ※2012年7月以前掲載分については米国以外のすべての指定国
  • NIIGATA UNIVERSITY
  • 発明者(英語)
  • KIM, Hee Joon
国際特許分類(IPC)
指定国 National States: AE AG AL AM AO AT AU AZ BA BB BG BH BN BR BW BY BZ CA CH CL CN CO CR CU CZ DE DJ DK DM DO DZ EC EE EG ES FI GB GD GE GH GM GT HN HR HU ID IL IN IR IS JO JP KE KG KH KN KP KR KW KZ LA LC LK LR LS LU LY MA MD ME MG MK MN MW MX MY MZ NA NG NI NO NZ OM PA PE PG PH PL PT QA RO RS RU RW SA SC SD SE SG SK SL SM ST SV SY TH TJ TM TN TR TT TZ UA UG US UZ VC VN ZA ZM ZW
ARIPO: BW GH GM KE LR LS MW MZ NA RW SD SL SZ TZ UG ZM ZW
EAPO: AM AZ BY KG KZ RU TJ TM
EPO: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
OAPI: BF BJ CF CG CI CM GA GN GQ GW KM ML MR NE SN ST TD TG
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