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Preparation method of superfine manganese oxide

A technology of manganese oxide and manganese salt, which is applied in the field of preparation of ultra-fine manganese oxide, can solve the problems of powder particle size not reaching the nanometer level, strong oxidation and corrosion, etc. The effect of low cost and simple preparation process

Active Publication Date: 2012-05-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The production process of this method is relatively simple, but the raw materials potassium permanganate and sodium hydroxide have strong oxidizing and corrosive properties, and the produced Mn 3 o 4 Powder particle size does not reach the nanometer level

Method used

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  • Preparation method of superfine manganese oxide
  • Preparation method of superfine manganese oxide
  • Preparation method of superfine manganese oxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Weigh manganese nitrate Mn(NO 3 ) 2 (concentration 50%, analytical pure AR, molecular weight 178.95) solution 35.8 grams, (being Mn(NO 3 ) 2 0.1mol), after heating to 40°C in a water bath, 12.9 grams of citric acid (C 6 h 8 o 7 , analytically pure, molecular weight 192.14) particles (0.067mol), stirred to dissolve in the above Mn(NO 3 ) 2 solution, denoted as A1.

[0041] Raise the temperature of the water bath to 50° C., and place A1 there for 6 hours to form B1.

[0042] Put B1 into an oven, bake at 110°C for 4 hours, put it into a muffle furnace, and bake at 300°C for 4 hours to form C1. Carry out XRD and TEM analysis and test of C1, and the results of the obtained crystal form and particle size are shown in the attached figure 1 and figure 2 .

Embodiment 2

[0044] Weigh manganese acetate (Mn(CH 3 COO) 2 4H 2 O, AR, molecular weight 245.10) 24.5 grams (0.1mol), make it be dissolved in 25 grams of deionized water, form the manganese acetate solution of 35%, after being heated to 40 ℃ in water bath, add 19.2 grams of citric acid particles wherein ( 0.1mol), stirred to dissolve in manganese acetate solution, denoted as A2.

[0045] Raise the temperature of the water bath to 50° C., and place A2 there for 8 hours to form B2.

[0046] Put B2 into an oven, bake at 100°C for 4 hours, put it into a muffle furnace, and bake at 300°C for 4 hours to form C2. The results of XRD and TEM analysis of C2 are shown in Table 1.

Embodiment 3

[0048] Weigh Mn(NO 3 ) 2 (50%, AR) solution 35.8 grams (0.1mol), after heating to 40 ℃ in water bath, add 15 grams (0.1mol) tartaric acid (C 4 h 6 o 6 , AR, molecular weight 150.09), stirred to dissolve in Mn(NO 3 ) 2 solution, denoted as A3.

[0049]Raise the temperature of the water bath to 50° C., and place A3 there for 5 hours to form B3.

[0050] Put B3 into an oven, bake at 110°C for 4 hours, put it into a muffle furnace, and bake at 350°C for 4 hours to form C3. C3 was analyzed and tested by XRD and TEM, and the results of crystal form and particle size are shown in Table 1.

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Abstract

The invention discloses a preparation method of a superfine manganese oxide. The preparation method comprises the following steps of: adding organic acid to a manganese salt solution, stirring for uniform mixing, then drying and roasting to obtain the superfine manganese oxide, wherein manganese salt is divalent soluble manganese salt, the concentration of the manganese salt solution is 20-50 percent, the organic acid is organic carboxylic acid with oxidization resistance or ascorbic acid with reducibility, wherein the molar ratio of carboxyl in the organic carboxylic acid to manganese is (1-6): 1, the molar ratio of the ascorbic acid to the manganese is (0.5-3): 1, the stirring temperature is 40-80 DEG C, and a solvent is kept to be evaporated in the range of the stirring temperature; the drying temperature is 100-120 DEG C; and the roasting temperature is 300-600 DEG C, and the roasting time is 2-10h. The preparation method disclosed by the invention has the advantages of simple production process flow and common and easily-obtained raw materials; and the prepared manganese oxide powder has the particle size of between 10nm and 60nm.

Description

technical field [0001] The invention relates to the preparation of manganese oxides in the chemical field, and furthermore, relates to a preparation method of ultrafine manganese oxides. Background technique [0002] Many manganese materials have important applications in the electronics industry and energy and chemical industries. For example, Mn 3 o 4 The powder and the manganese zinc ferrite soft magnetic material prepared from it have been widely used in the electronics and information industries, and in the chemical industry, catalysts with manganese as the main active component can be used to reduce nitrogen oxides, Nitro compounds and elimination of carbon monoxide etc. Manganese is also an active component or an important component in various purifiers and catalysts. Purifiers and catalysts that use it as an active component mainly include desulfurizers, dearsenic agents, deoxidizers, desulfurization and denitrification catalysts, ozonolysis catalysts and other o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/02
Inventor 王翀王秀玲王红亚鲁树亮徐洋
Owner CHINA PETROLEUM & CHEM CORP
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