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METHOD FOR RECOVERING NOBLE METAL AND NOBLE METAL RECOVERING AGENT

Foreign code F180009346
File No. S2016-0602-C0
Posted date Apr 17, 2018
Country WIPO
International application number 2017JP012468
International publication number WO 2017170444
Date of international filing Mar 27, 2017
Date of international publication Oct 5, 2017
Priority data
  • P2016-064547 (Mar 28, 2016) JP
  • P2016-064560 (Mar 28, 2016) JP
Title METHOD FOR RECOVERING NOBLE METAL AND NOBLE METAL RECOVERING AGENT
Abstract A method for recovering a noble metal from a mixture that contains the noble metal with use of a noble metal recovering agent which contains at least one amine compound selected from among aromatic primary amine compounds and aliphatic primary amine compounds. In this method for recovering a noble metal, the noble metal recovering agent and the mixture are added into a hydrochloric acid that has a concentration of from 1.0 mol/L to 9.0 mol/L (inclusive), and the noble metal recovering agent is caused to adsorb the noble metal. In this connection, the aromatic primary amine compounds are aniline, 3-phenoxy aniline, 4-phenoxy aniline and 4-alkyl anilines having an alkyl group with 1-8 carbon atoms; and the aliphatic primary amine compounds are linear alkyl monoamines having 6 to 18 carbon atoms (inclusive), 2-ethylhexyl amine and benzyl amine. By this method, a noble metal is efficiently recovered at low cost.
Scope of claims [claim1]
1. An aromatic primary amine compound, or, a compound selected from the group consisting of aliphatic primary amines and at least one amine compound containing a noble metal recovery agents, from a mixture comprising a precious metal, precious metal recovery method, wherein the concentration of said mixture with a noble metal recovery is greater than or equal to 9.0mol/L or less and included in the 1.0mol/L hydrochloric acid, wherein the precious metal to said noble metal is a noble metal adsorption agent for recovering the collected in the method of, wherein the aromatic primary amine compound, an aniline, 3 - phenoxyaniline, 4 - phenoxyaniline, having an alkyl group of 1-8 carbon atoms and 4 - methylaniline, the aliphatic primary amine compounds, the number of carbon atoms greater than or equal to 6 18 straight-chain alkyldiureas, 2 - amine, a benzylamine, method.
[claim2]
2. Wherein the noble metal is, platinum, palladium, rhodium and at least one selected from the group consisting 1, according to claim 1 precious metal recovery method.
[claim3]
3. Claim as an amine compound, the aliphatic primary amine using a compound, wherein the concentration of hydrochloric acid, more than 3.0mol/L, according to claim 1 or 2 precious metal recovery method.
[claim4]
4. Wherein the amino compound and the amino groups contained in the mixture the molar ratio of said noble metal is 10 to (NH2/REM) or more, a precious metal recovery method of any one of the claims 1-3.
[claim5]
5. Wherein the amine compound, wherein said aromatic primary amine compound, the concentration of hydrochloric acid, 2.0mol/L or more, are allowed to adsorb to the rhodium, the method according to claim 1 precious metal recovery.
[claim6]
6. Wherein the concentration of hydrochloric acid, 8.0mol/L or more and less than or equal to 2.5mol/L, according to claim 5 precious metal recovery method.
[claim7]
7. Wherein the amino group of an amino compound wherein the molar ratio of the rhodium contained in the mixture (NH2/Rh) is greater than or equal to 5, according to claim 5 or 6 precious metal recovery method.
[claim8]
8. As a precious metal, platinum, palladium, and rhodium from a mixture comprising, a method for selectively recovering a precious metal of each of the method, the number of carbon atoms greater than or equal to 6 8 straight-chain alkyldiureas noble metals recovery and the first compound and the agent, the concentration of said mixture less than or equal to 2.0mol/L or more is included in hydrochloric acid of 0.5mol/L, of the first noble metal platinum adsorbed platinum collecting agent recovery step, wherein after the step of recovering the platinum hydrochloric acid solution comprising a mixture of 3mol/L to 9mol/L or more and concentration of hydrochloric acid is adjusted to less than or equal to, 6 carbon atoms after the hydrochloric acid solution of 8 or more alkyldiureas straight-chain of the first compound and the noble metals recovery and the agent, wherein the first noble metal recovery agent is adsorbed to the rhodium is rhodium recovery step, wherein after the step of recovering the rhodium with hydrochloric acid solution comprising a mixture of 12 or more carbon atoms in the straight-chain 9 alkyldiureas noble metals recovery and the second compound is allowed to be included agents, noble metals recovery and the second palladium adsorbed palladium agent corresponds to the recovery step, the, method of selective recovery of a precious metal.
[claim9]
9. 3- Phenoxyaniline, 4 - phenoxyaniline, having an alkyl group of 1-8 carbon atoms 4 - methylaniline, the number of carbon atoms greater than or equal to 6 18 straight-chain alkyldiureas, 2 - amine, 1 amine of the amine compound of at least one selected from the group consisting characterized in containing, collecting agent for the noble metal.
[claim10]
10. Wherein the noble metal is, platinum, palladium, rhodium and at least one selected from the group consisting 1, according to claim 9 noble metals recovery and the agent.
[claim11]
11. 3- Phenoxyaniline, 4 - phenoxyaniline, having a carbon number of 1-8 4 - alkyl groups of which have at least one amine selected from the group consisting 1 alkylaniline compound, rhodium collecting agent.
  • Applicant
  • ※All designated countries except for US in the data before July 2012
  • AKITA UNIVERSITY
  • Inventor
  • MATSUMOTO KAZUYA
  • JIKEI MITSUTOSHI
  • YAMAKAWA SUMITO
IPC(International Patent Classification)
Specified countries (WO2017170444)
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 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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