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A pure-phase nickel ferrite nanomaterial and its preparation method, and a preparation method of aromatic amine

A nanomaterial, nickel ferrite technology, applied in the field of nickel ferrite and its preparation method, and aromatic amine preparation field, can solve the problems of high price of precious metals, increase production cost, difficult to meet industrialization process, etc., and achieve high catalytic activity and efficiency High and low cost effect

Active Publication Date: 2015-09-23
ANHUI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the performance of these catalysts is excellent, the disadvantages such as the high price of the precious metal itself and the difficulty of recycling the catalyst severely limit the use of this type of catalyst, and borohydrides are expensive, and the use of excessive borohydrides increases the production cost. Difficult to meet the increasing pursuit of high-efficiency industrialization process

Method used

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  • A pure-phase nickel ferrite nanomaterial and its preparation method, and a preparation method of aromatic amine
  • A pure-phase nickel ferrite nanomaterial and its preparation method, and a preparation method of aromatic amine
  • A pure-phase nickel ferrite nanomaterial and its preparation method, and a preparation method of aromatic amine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Fig. 3(a) is a scanning electron micrograph of the pure-phase nickel ferrite prepared in Example 1, which is octahedral nano-magnetic particles with a particle size of 70nm.

[0053] The preparation method of pure phase nickel ferrite nanometer material comprises the following steps:

[0054] a. Stir and mix 1mmol of cetyltrimethylammonium bromide with 5mL of n-hexane and 1.7mL of isopropanol to obtain solution A; mix 1.5mmol of cetyltrimethylammonium bromide with 5mL of n-hexane and 2.5mL of isopropanol were stirred and mixed to obtain solution B;

[0055] b. Take 0.7mL of nickel chloride hexahydrate and ferric nitrate nonahydrate mixed salt solution, add it dropwise into the solution A, stir for 20 minutes to obtain suspension A, put the mixed salt solution in 0.7mL Contains 0.125 mmol of nickel chloride hexahydrate and 0.25 mmol of ferric nitrate nonahydrate; add 6 mL of 0.5 mol / L potassium hydroxide solution dropwise to the solution B, and stir for 20 minutes to ob...

Embodiment 2

[0060] Fig. 3(b) is a scanning electron micrograph of the pure-phase nickel ferrite prepared in Example 2, which is octahedral nano-magnetic particles with a particle size of 80 nm.

[0061] The preparation method of pure phase nickel ferrite nanometer material comprises the following steps:

[0062] a. Stir and mix 25mL of 5mmol cetyltrimethylammonium bromide n-hexane and 9.2mL of isopropanol to obtain solution A; mix 6mmol cetyltrimethylammonium bromide with 30mL of n-hexane and 11mL of isopropanol was stirred and mixed to obtain solution B;

[0063] b. Take 2mL of mixed salt solution of nickel chloride hexahydrate and ferric nitrate nonahydrate, add it dropwise to the solution A, and stir for 30 minutes to obtain suspension A. The 2mL mixed salt solution contains nickel chloride hexahydrate 0.376mmol and 0.752mmol of ferric nitrate nonahydrate; 10mL of 1mol / L sodium hydroxide solution was added dropwise to the solution B, and stirred for 30 minutes to obtain a suspension B...

Embodiment 3

[0068] Fig. 3(c) is a scanning electron micrograph of the pure-phase nickel ferrite prepared in Example 3, which is octahedral nano-magnetic particles with a particle size of 100 nm.

[0069] The preparation method of pure phase nickel ferrite nanometer material comprises the following steps:

[0070] a. Stir and mix 1.5mmol of cetyltrimethylammonium bromide with 17mL of n-hexane and 6.1mL of isopropanol to obtain solution A; mix 8mmol of cetyltrimethylammonium bromide with 20mL of n-hexane Stir and mix with 5.5mL of isopropanol to obtain solution B;

[0071] b. Take 1.2mL of nickel sulfate hexahydrate and ferric chloride hexahydrate mixed salt solution, dropwise added to the solution A, stirred for 40 minutes, to obtain suspension A, the mixed salt solution contained six 0.225 mmol of nickel sulfate hydrate and 0.45 mol of ferric chloride hexahydrate; 12 mL of 0.25 mol / L sodium hydroxide solution was added dropwise to the solution B, and stirred for 40 minutes to obtain susp...

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Abstract

The invention discloses a pure-phase nickel ferrite nano material as well as a preparation method thereof and a preparation method of aromatic amine. The pure-phase nickel ferrite nano material provided by the invention is as follows: pure-phase nickel ferrite is an octahedral nano magnetic particle with particle diameter of 50 nm-120 nm. The preparation method of the pure-phase nickel ferrite nano material comprises the following steps of: uniformly mixing mixed salt liquor of a nickel salt and a ferric salt with mixed liquor of a surfactant, normal hexane and isopropanol; uniformly mixing an alkaline agent with the mixed liquor of the surfactant, normal hexane and isopropanol; and mixing the two liquor, heating and reacting, cooling, washing, and drying in vacuum to obtain a catalyst nickel ferrite. The invention further discloses a method of preparing aromatic amine by using the nickel ferrite as the catalyst, wherein the preparation method comprises the following step of: adding proper amount of the catalyst into liquor of an aromatic nitro-compound containing a ceriman amount of sodium borohydride to realize catalysis. The invention provides a pure-phase nickel ferrite catalyst which is economical, efficient and capable of being recycled as well as a method of preparing aromatic amine with low speed, quick speed and high efficiency.

Description

technical field [0001] The invention relates to the field of nickel ferrite sodium and its preparation method, and the preparation method of aromatic amine, and in particular to a pure-phase nickel ferrite nanomaterial and its preparation method, and a preparation method of aromatic amine. Background technique [0002] Aromatic amine is an important organic intermediate and raw material, which is used in the synthesis of pesticides, medicines, rubber additives, fuels and pigments, synthetic resins, textile auxiliaries, surfactants, photosensitive materials, etc. Aromatic amines can be obtained by reduction of the corresponding nitroaromatic compounds. There are many reduction methods, among which borohydride reduction of nitroaromatic compounds has attracted much attention due to its mild reaction conditions, fast reaction speed, high yield and simple process. When borohydride is used for reduction, catalysts need to be added for catalysis. At present, heterogeneous catalys...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/755C07C213/02C07C215/76C07C215/80C07C209/36C07C211/51
Inventor 倪永红郑航嵩
Owner ANHUI NORMAL UNIV
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