# US 10,758,893 B2 · Solid-phase catalyst for decomposing hydrogen peroxide and method for producing same

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- Number: US 10,758,893 B2
- Document ID: US10758893B2
- Status: Granted
- Kind: B2
- Application number: 16/069,619
- Filed: 2017-01-13
- Published: 2019-01-10
- Granted: 2020-09-01
- Earliest claimed: 2016-01-14
- Assignees: Korea Research Insitute of Chemical Technology; Nf Corporation
- Applicants: Korea Research Institute of Chemical Technology; Nf Co., Ltd
- Inventors: Iljeong Heo; Jeong Kwon Suh; Beom Sik Kim; Tae Sun Chang; Yun Ho Jeong; Ji Hoon Park; Soo Min Kim; Ji Na Choi
- Web page: https://patentgrep.com/patent/US10758893B2

## CPC

- B01J 23/34: Manganese
- B01J 23/688: {with manganese, technetium or rhenium}
- B01J 35/45: Nanoparticles
- B01J 37/0236: {Drying, e.g. preparing a suspension, adding a soluble salt and drying}
- B01J 37/031: {Precipitation}
- B01J 37/04: Mixing {(B01J37/0009, B01J37/0018 take precedence)}
- B01J 37/06: Washing {(B01J37/0009, B01J37/0018 take precedence)}
- B01J 37/088: {Decomposition of a metal salt}
- C01B 5/00: Water
- C01B 13/0203: {from inorganic compounds}
- C01B 15/01: Hydrogen peroxide
- C01G 45/1214: containing alkali metals
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C}
- C01G: COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F (metal hydrides {monoborane, diborane or addition complexes thereof} C01B6/00; salts of oxyacids of halogens C01B11/00; peroxides, salts or peroxyacids C01B15/00; thiosulfates, dithionites, polythionates C01B17/64; compounds containing selenium, or tellurium C01B19/00; binary compounds of nitrogen with metals C01B21/06; azides C01B21/08; {compounds containing nitrogen, other non-metals and metal C01B21/082}; metal amides C01B21/092; nitrites C01B21/50; {compounds of noble gases C01B23/0005}; phosphides C01B25/08; salts of oxyacids of phosphorus C01B25/16; carbides C01B32/90; compounds containing silicon C01B33/00; compounds containing boron C01B35/00; compounds having molecular sieve properties but not having base-exchange properties C01B37/00; compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites, C01B39/00; cyanides C01C3/08; salts of cyanamide C01C3/16; thiocyanates C01C3/20)

## Abstract

The present invention provides a solid-phase catalyst for decomposing hydrogen peroxide comprising a permanganate salt and a manganese (II) salt. The solid-phase catalyst stays a solid state in the form of nanoparticles at the time of hydrogen peroxide decomposition, and thus can be recovered for reuse and also has an excellent decomposition rate. In the method for producing a solid-phase catalyst for decomposing hydrogen peroxide according to the present invention, a solid-phase catalyst is produced from a solution containing a permanganate salt, a manganese (II) salt, and an organic acid, so that the produced solid-phase catalyst is precipitated as a solid component even after a catalytic reaction, and thus is reusable and environmentally friendly, and cost reduction can be achieved through the simplification of a catalyst production technique.

## Claims

### Claim 1

A method for producing a solid-phase catalyst for decomposing hydrogen peroxide comprising the following steps:
preparing an aqueous solution, comprising adding a permanganate salt, a manganese (II) salt and one or more organic acids selected from the group consisting of formic acid, acetic acid, oxalic acid, and citric acid to water (step 1);
aging the aqueous solution of step 1 to form a solid-phase catalyst (step 2); and
cleaning, drying and calcinating the solid-phase catalyst formed in step 2 (step 3).

### Claim 2 (depends on 1)

The method for producing a solid-phase catalyst for decomposing hydrogen peroxide according to claim 1, wherein the solid-phase catalyst is a heterogeneous catalyst of nanoparticles.

### Claim 3 (depends on 1)

The method for producing a solid-phase catalyst for decomposing hydrogen peroxide according to claim 1, wherein the permanganate salt is selected from the group consisting of potassium permanganate (KMnO4), zinc permanganate (Zn(MnO4)2), calcium permanganate (Ca(MnO4)2), silver permanganate (AgMnO4), sodium permanganate (NaMnO4), barium permanganate (Ba(MnO4)2), magnesium permanganate (Mg(MnO4)2), strontium permanganate (Sr(MnO4)2), lithium permanganate (LiMnO4), cadmium permanganate (Cd(MnO4)2), cesium permanganate (CsMnO4), and rubidium permanganate (RbMnO4).

### Claim 4 (depends on 1)

The method for producing a solid-phase catalyst for decomposing hydrogen peroxide according to claim 1, wherein the manganese (II) salt is one or more compounds selected from the group consisting of manganese acetate, manganese nitrate, manganese chloride, manganese acetylacetonate, manganese bromide, manganese carbonate, manganese fluoride, manganese iodide, and manganese sulfate.

### Claim 5 (depends on 1)

The method for producing a solid-phase catalyst for decomposing hydrogen peroxide according to claim 1, wherein the aging treatment in step 2 is performed with the sealed mixture in a dark room at room temperature at normal pressure for 5˜80 hours.

### Claim 6 (depends on 1)

The method for producing a solid-phase catalyst for decomposing hydrogen peroxide according to claim 1, wherein the calcinating process in step 3 is performed in air or an inert gas atmosphere at 50˜350° C.