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Manganese/oxygen compound with arsenic adsorption

外国特許コード F110005683
整理番号 Y0127US
掲載日 2011年9月9日
出願国 アメリカ合衆国
出願番号 47389001
公報番号 20040109821
公報番号 7335622
出願日 平成13年10月19日(2001.10.19)
公報発行日 平成16年6月10日(2004.6.10)
公報発行日 平成20年2月26日(2008.2.26)
国際出願番号 JP2001009216
国際公開番号 WO2002081376
国際出願日 平成13年10月19日(2001.10.19)
国際公開日 平成14年10月17日(2002.10.17)
優先権データ
  • 特願2001-103988 (2001.4.2) JP
  • 特願2001-277169 (2001.9.12) JP
  • 2001WO-JP09216 (2001.10.19) WO
発明の名称 (英語) Manganese/oxygen compound with arsenic adsorption
発明の概要(英語) (US7335622)
A novel technique that is able to efficiently remove, in addition to pentavalent arsenic, trivalent arsenic that has been considered to be difficult to remove.
By using a manganese oxygen compound which is characterized by being a product of burning or heating which comprises an oxygen compound of bismuth and an oxygen compound of manganese and by containing manganese as a major component, an aqueous arsenic solution is treated to adsorptively remove the arsenic.
特許請求の範囲(英語) [claim1]
1. A manganese oxygen compound with pentavalent or trivalent arsenic sorbability which is a product of burning or heating which consists of an oxygen compound of bismuth and an oxygen compound of manganese and contains manganese as a major component, wherein the molar mixing ratio of the compound of bismuth and the compound of manganese is in the range of 0.01:1 to 1:1.
[claim2]
2. The manganese oxygen compound with pentavalent or trivalent arsenic sorbability according to claim 1, wherein a compound of manganese in which a compound of bismuth is added is burned or heated in the atmosphere or an atmosphere containing oxygen.
[claim3]
3. The manganese oxygen compound with pentavalent or trivalent arsenic sorbability according to claim 1, wherein a mixture of oxidized bismuth carbonate powder and manganese carbonate powder is burned or heated at a temperature of 150 deg. C. to 400 deg. C.
[claim4]
4. An arsenic adsorbent comprising the oxygen compound of manganese according to claim 1, or a compound containing the oxygen compound of manganese.
[claim5]
5. A method of adsorption and removal of arsenic in solution which comprises, contacting an arsenic adsorbent according to claim 4 and an aqueous arsenic solution, and adsorbing and removing arsenic contained in solution.
[claim6]
6. A method of reclaiming the arsenic adsorbent of claim 5 which comprises, performing an acid treatment on the arsenic adsorbent which adsorbed arsenic, making arsenic desorb into an acid solution, and recovering the arsenic adsorbent.
[claim7]
7. An arsenic adsorbent comprising the manganese oxygen compound according to claim 1 retained on or filled in a carrier substance.
[claim8]
8. A method of adsorption and removal of arsenic in solution which comprises, contacting an arsenic adsorbent according to claim 7 and an aqueous arsenic solution, and adsorbing and removing arsenic contained in solution.
[claim9]
9. A method of reclaiming the arsenic adsorbent of claim 8 which comprises, performing an acid treatment on the arsenic adsorbent which adsorbed arsenic, making arsenic desorb into an acid solution, and recovering the arsenic adsorbent.
[claim10]
10. A process for producing the manganese oxygen compound with pentavalent or trivalent arsenic sorbability according to claim 1, which comprises mixing a base material for the oxygen compound of bismuth and a base material for the oxygen compound of manganese for forming the manganese oxygen compound, and burning or heating the base materials.
[claim11]
11. The process according to claim 10, wherein the base materials are burned or heated at a temperature of 150 deg.C. to 400 deg.C.
[claim12]
12. The process according to claim 10, which further comprises treating the product of burning or heating with an acid.
[claim13]
13. The manganese oxygen compound with pentavalent or trivalent arsenic sorbability according to claim 1, wherein the product of burning or heating is an acid-treated product.
  • 発明者/出願人(英語)
  • KOYANAKA HIDEKI
  • KASAI TOSHIHIRO
  • JAPAN SCIENCE AND TECHNOLOGY AGENCY
国際特許分類(IPC)
米国特許分類/主・副
  • 502/400
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