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Catalyst for catalytic hydrogenation and preparation method and application thereof

A catalytic hydrogenation and catalyst technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve low product yield, short service life of catalysts, synthetic Problems such as poor hydrogenation efficiency can achieve the effects of reducing the decay rate, prolonging the service life, and increasing the number of hydrogenation times

Pending Publication Date: 2021-11-30
广东众和高新科技股份公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the catalytic hydrogenation process of 1,8-diamino-3,6-naphthalene disulfonic acid in the prior art, there are problems such as poor synthesis hydrogenation efficiency, low product yield, and short catalyst service life.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] This embodiment provides a catalyst for catalytic hydrogenation, the catalyst comprising:

[0044] 9.5% of cerium, 4.5% of cobalt, 4.5% of aluminum, and the balance is nickel.

[0045] The preparation method is as follows:

[0046] (1) carry out mixed treatment with lye, cerium powder and aluminum-nickel alloy according to formula, obtain intermediate material; The mass concentration of described lye is 17%; The liquid-solid ratio mL / mL / g is 7.56:1; the mixing process is a stirring and mixing process; the stirring velocity in the stirring and mixing process is 1500r / min; the time of the mixing process is 70min;

[0047] (2) The intermediate material obtained in step (1) is washed, and then the washed intermediate material is filtered to remove the remaining cerium powder and mixed with cobalt powder to obtain the catalyst; the end point of the washing is washing water The pH value of the mixture is 7; the mixing speed is 1500r / min; the mixing time is 35min.

Embodiment 2

[0049] This embodiment provides a catalyst for catalytic hydrogenation, the catalyst comprising:

[0050] 9% of cerium, 5% of cobalt, 4% of aluminum, and the balance is nickel.

[0051] The preparation method is as follows:

[0052] (1) carry out mixed treatment with lye, cerium powder and aluminum-nickel alloy according to formula, obtain intermediate material; The mass concentration of described lye is 20%; The liquid-solid ratio mL / mL / g is 6:1; the mixing process is a stirring and mixing process; the stirring velocity in the stirring and mixing process is 1400r / min; the time of the mixing process is 80min;

[0053] (2) The intermediate material obtained in step (1) is washed, and then the washed intermediate material is filtered to remove the remaining cerium powder and mixed with cobalt powder to obtain the catalyst; the end point of the washing is washing water The pH value of the mixture is 6; the mixing speed is 1550r / min; the mixing time is 40min.

Embodiment 3

[0055] This embodiment provides a catalyst for catalytic hydrogenation, the catalyst comprising:

[0056] 10% of cerium, 4% of cobalt, 5% of aluminum, and the balance is nickel.

[0057] The preparation method is as follows:

[0058] (1) carry out mixed treatment with lye, cerium powder and aluminum-nickel alloy according to formula, obtain intermediate material; The mass concentration of described lye is 15%; The liquid-solid ratio mL / mL / g is 9:1 and the mixing treatment is stirring and mixing treatment; the stirring speed in the stirring and mixing treatment is 1400r / min; the time of the mixing treatment is 60min;

[0059] (2) The intermediate material obtained in step (1) is washed, and then the washed intermediate material is filtered to remove the remaining cerium powder and mixed with cobalt powder to obtain the catalyst; the end point of the washing is washing water The pH value of the mixture is 8; the mixing speed is 1450r / min; the mixing time is 30min.

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Abstract

The invention relates to a catalyst for catalytic hydrogenation and a preparation method and application thereof. The catalyst comprises the following components, by mass: 9-10% of cerium, 4-5% of cobalt, 4-5% of aluminum and the balance of nickel. According to the catalytic hydrogenation catalyst provided by the invention, the problem of poor hydrogenation efficiency of 1, 8-diamino-3, 6-naphthalene disulfonic acid at present is solved by redesigning the catalyst components, the catalytic hydrogenation reduction catalytic efficiency of the 1, 8-dinitro-3, 6-naphthalene disulfonic acid is improved, and the conversion rate of the 1, 8-dinitro-3, 6-naphthalene disulfonic acid is over 99%.

Description

technical field [0001] The invention relates to the field of catalytic hydrogenation, in particular to a catalyst for catalytic hydrogenation and its preparation method and application. Background technique [0002] 1,8-diamino-3,6-naphthalene disulfonic acid is an intermediate for the preparation of H acid, and can also be directly used to synthesize new reactive dyes. H acid (chemical name: 1-amino-8-naphthol-3,6-disulfonic acid) is the most important organic intermediate in the naphthalene series, and is also an important intermediate in the dye and pigment industry. It is widely used in printing and dyeing, Textile, cotton and chemical industries. [0003] For example, CN103113269A discloses a 1,8-dinitro-3,6-naphthalene disulfonate hydrogenation reduction method, which belongs to the technical field of hydrogenation reaction containing nitronaphthalene disulfonic acid connected to the same carbon frame. Catalytic hydrogenation reduction of 1,8-dinitro-3,6-naphthalene ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83C07C303/22C07C309/47B01J35/02
CPCB01J23/83C07C303/22B01J35/40C07C309/47
Inventor 曹勇俊杨寿盛张海涛郑岩季成忠许诺
Owner 广东众和高新科技股份公司
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