Palladium separating agent, method for producing same and use of same

Patent metadata

Field	Value
Publication number	US-10752977-B2
Application number	US-201214349870-A
Country	US
Kind code	B2
Filing date	Oct 5, 2012
Priority date	Oct 7, 2011
Publication date	Aug 25, 2020
Grant date	Aug 25, 2020

Abstract

To provide a palladium separating agent capable of separating palladium ions from a solution containing palladium ions of a low concentration to a high concentration in a short time with a high selectivity, and a method for separating palladium.
A palladium separating agent having a functional group represented by the formula (1) bonded to a carrier:

—Z—(CH 2 ) n -S—R  (1)
wherein R is a C 1-18 chain hydrocarbon group, a C 3-10 alicyclic hydrocarbon group, a C 6-14 aromatic hydrocarbon group, a carboxymethyl group or a carboxyethyl group, n is an integer of from 1 to 4, and Z is an amide bond.

First claim

The invention claimed is:

1. A palladium separating agent which selectively adsorbs palladium ions and which comprises a functional group represented by the formula (2) bonded to an inorganic carrier by means of a methylene group pre-bonded to the inorganic carrier, an ethylene group pre-bonded to the inorganic carrier, a C 3-8 linear alkylene group pre-bonded to the inorganic carrier, or a C 3-8 branched alkylene group pre-bonded to the inorganic carrier:

wherein R is a C 1-18 chain hydrocarbon group, a C 3-10 alicyclic hydrocarbon group, a C 6-14 aromatic hydrocarbon group, a carboxymethyl group or a carboxyethyl group, and n is an integer of from 1-4.

2. The palladium separating agent according to claim 1 , wherein the functional group represented by the formula (1) is bonded to the inorganic carrier by means of a n-propylene group pre-bonded to the inorganic carrier.

3. The palladium separating agent according to claim 1 , wherein R in the formula (2) is a methyl group, an ethyl group, a propyl group, a butyl group, an isopropyl group, a phenyl group or a benzyl group.

4. The palladium separating agent according to claim 1 , wherein the inorganic carrier is a silica gel.

5. A method for producing the palladium separating agent according to claim 1 , which comprises reacting a sulfide-containing carboxylic acid compound represented by the formula (3) with an inorganic carrier having an amino group to obtain the palladium separating agent which comprises a function group represented by the formula (2) bonded to the inorganic carrier by means of a methylene group pre-bonded to the inorganic carrier, an ethylene group pre-bonded to the inorganic carrier, a C 3-8 linear alkylene group pre-bonded to the inorganic carrier, or a C 3-8 branched alkylene group pre-bonded to the inorganic carrier:

wherein R is a C 1-16 chain hydrocarbon group, a C 3-10 alicyclic hydrocarbon group, a C 6-14 aromatic hydrocarbon group, a carboxymethyl group or a carboxyethyl group, n is an integer of from 1 to 4;
HO 2 C—(CH 2 ) n —S—R  (3)

wherein R is a C 1-16 chain hydrocarbon group, a C 3-10 alicyclic hydrocarbon group, a C 6-14 aromatic hydrocarbon group, a carboxymethyl group, a carboxyethyl group, and n is an integer of from 1 to 4.

6. The method for producing the palladium separating agent according to claim 5 , wherein the inorganic carrier having an amino group is one obtained by reacting a silane coupling agent having an amino group represented by the formula (4) with an inorganic carrier

wherein each of X's which are independent of one another, is a methyl group, an ethyl group, a methoxy group or an ethoxy group, provided that at least one of them is a methoxy group or an ethoxy group, and Y is a C 1-12 aminoalkyl group having from 1 to 2 nitrogen atoms.

7. A method for adsorbing palladium ions, which comprises bringing a palladium separating agent as defined in claim 1 into contacted with a solution containing palladium ions.

8. A method for desorbing palladium ions, which comprises bringing the palladium separating agent in which palladium ions are adsorbed, obtained by the method for adsorbing palladium ions as defined in claim 7 , into contact with a desorbing agent.

9. The method for desorbing palladium ions according to claim 8 , wherein the desorbing agent is ammonia, thiourea or methionine.

10. A chromatography column, comprising the palladium seperating agent as defined in claim 1 .

Assignees

• Tosoh Corp

Inventors

• Sudo Yukinori
• Masuda Takahiro
• Yoshida Setsuo

Classifications

• C02F1/683

  by addition of complex-forming compounds · CPC title

• B01J20/345

  using a particular desorbing compound or mixture (elution or regeneration of stationary phases in liquid chromatography B01D15/08) · CPC title

• C22B11/04 Primary

  by wet processes (extraction of metal compounds by leaching in organic solutions C22B3/16; treatment or purification of solutions by liquid-liquid extraction C22B3/26) · CPC title

• B01J20/3219

  involving a particular spacer or linking group, e.g. for attaching an active group · CPC title

• Y02P10/20

  Recycling · CPC title