Solid-phase catalyst for decomposing hydrogen peroxide and method for producing same

Patent metadata

Field	Value
Publication number	US-10758893-B2
Application number	US-201716069619-A
Country	US
Kind code	B2
Filing date	Jan 13, 2017
Priority date	Jan 14, 2016
Publication date	Sep 1, 2020
Grant date	Sep 1, 2020

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.

First claim

What is claimed is:

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).

2. 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.

3. 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 (KMnO 4 ), zinc permanganate (Zn(MnO 4 ) 2 ), calcium permanganate (Ca(MnO 4 ) 2 ), silver permanganate (AgMnO 4 ), sodium permanganate (NaMnO 4 ), barium permanganate (Ba(MnO 4 ) 2 ), magnesium permanganate (Mg(MnO 4 ) 2 ), strontium permanganate (Sr(MnO 4 ) 2 ), lithium permanganate (LiMnO 4 ), cadmium permanganate (Cd(MnO 4 ) 2 ), cesium permanganate (CsMnO 4 ), and rubidium permanganate (RbMnO 4 ).

4. 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.

5. 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.

6. 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.

Assignees

• Korea Res Inst Chemical Tech
• Nf Co Ltd
• Korea Research Insitute Of Chemical Tech

Inventors

• Heo Iljeong
• Suh Jeong Kwon
• Kim Beom Sik
• Chang Tae Sun
• Jeong Yun Ho
• Park Ji Hoon
• Kim Soo Min
• Choi Ji Na

Classifications

• B01J35/45

  Nanoparticles · CPC title

• B01J23/688

  with manganese, technetium or rhenium · CPC title

• C01G45/1214

  containing alkali metals · CPC title

• C01B15/01

  Hydrogen peroxide · CPC title

• C01G45/02

  Oxides · CPC title