Method for producing hydroxylamine compound using platinum catalyst fixed on ion-exchange resin
The present invention discloses a method for producing a hydroxylamine compound wherein a nitro compound is contacted with a hydrogen source or further with a poisoning agent in the presence of a platinum catalyst fixed on an ion-exchange resin. According to the method of the present invention where a platinum catalyst fixed on a matrix of an ion-exchange resin is used, the objective hydroxylamine compound can be produced (manufactured) efficiently, more industrially and safely with little formation of a byproduct. Further, the platinum catalyst fixed on an ion-exchange resin of the present invention is hardly deactivated even if repeatedly used many times because platinum metal is fixed on a matrix of the ion-exchange resin, and handling in recovery, reuse and the like of said catalyst is extremely easy because particle size of said catalyst is very large.
1. A method for producing a hydroxylamine compound, comprising:
contacting a nitro compound with a hydrogen source in the presence of a platinum catalyst fixed on an ion-exchange resin,
wherein the hydrogen source is hydrazine and the platinum catalyst fixed on an ion-exchange resin is obtained by adsorbing a platinum-containing ion in an aqueous solvent derived from a platinum compound with the ion-exchange resin followed by subjecting the ion to a reductive treatment, and
the platinum compound is selected from the group consisting of ammonium hexachloroplatinate, ammonium tetrachloroplatinate, potassium hexachloroplatinate, potassium tetrachloroplatinate, potassium tetrabromoplatinate, sodium hexachloroplatinate, sodium tetrachloroplatinate, platinum nitrate, platinum sulfate, platinum acetate, and platinum complexes coordinated with a ligand selected from the group consisting of 1,5-cyclooctadiene (COD), dibenzylideneacetone (DBA), norbornadiene (NBD), tricyclohexylphosphine (PCγ 3 ), triethoxyphosphine (P(OEt) 3 , tri-tert-butylphosphine (P(O′Bu) 3 , bipyridine (BPY), phenanthroline (PHE), triphenylphosphine (PPh 3 ), 1,2-bis(diphenylphosphino)ethane (DPPE), triphenoxyphosphine (P(OPh) 3 ), trimethoxyphosphine (P(OCH 3 ) 3 ), ethylene (CH 2 ═CH 2 ), amine(NH 3 ), N 2 and PO 3 .
2. The method according to claim 1 , wherein the nitro compound is a nitrobenzene derivative.
3. The method according to claim 1 , wherein a nitro compound is further contacted with a poisoning agent.
4. The method according to claim 3 , wherein the poisoning agent is dimethylsulfoxide.
5. The method according to claim 1 , wherein an ion-exchange resin used in preparation of the platinum catalyst fixed on an ion-exchange resin is a polystyrene copolymer cross-linked with divinylbenzene which has an ion-exchange group bonded to an aromatic ring thereof.
6. The method according to claim 1 , wherein an ion-exchange resin used in the preparation of the platinum catalyst fixed on an ion-exchange resin is a polyacrylic ester which has an ion-exchange group bonded to a carbonyl moiety of an ester group thereof.
7. The method according to claim 5 or 6 , wherein the ion-exchange group is an anion-exchange group.
8. The method according to claim 7 , wherein the anion-exchange group is selected from the group consisting of a primary amino group, a secondary amino group, a tertiary amino group, a quaternary ammonium group and an alkyldiamine group.
9. The method according to claim 8 , wherein the tertiary amino group is selected from the group consisting of a dimethylamino group, a methylethylamino group and a diethylamino group, and the quaternary ammonium group is selected from the group consisting of the following groups:
10. The method according to claim 5 or 6 , wherein the ion-exchange group is a cation-exchange group.
11. The method according to claim 10 , wherein the cation-exchange group is selected from the group consisting of a sulfonic acid group, a carboxyl group and a phenolic hydroxyl group.
12. The method according to claim 3 , wherein amount of the poisoning agent is 1 to 30% by weight to the nitro compound.
13. The method according to claim 1 , wherein the platinum compound is potassium tetrachloroplatinate or sodium tetrachloroplatinate.
14. The method according to claim 1 , wherein yield of hydroxylamine is 90% and over.