Cu@Ru/MCM-41 nanocatalyst, and preparation method and application thereof

A technology of MCM-41 and nano-catalyst, which is applied in the field of nano-catalyst research, can solve the problems of high impurity content in products and difficulty in treating waste water, etc., and achieve the effects of improving catalytic activity, no three wastes, and high catalytic activity

Inactive Publication Date: 2019-09-20
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The vast majority of domestic production of 1-aminothraquinone adopts the method of alkali sulfide reduction. During the reduction process of nitroanthraquinone, a large amount of difficult-to-treat wastewater will be generated, and the product has a high impurity content.

Method used

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  • Cu@Ru/MCM-41 nanocatalyst, and preparation method and application thereof
  • Cu@Ru/MCM-41 nanocatalyst, and preparation method and application thereof
  • Cu@Ru/MCM-41 nanocatalyst, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Preparation of catalyst:

[0039] Using sodium silicate as silicon source and di-n-propylamine (DPA) as template to control the channels of MCM-41, all-silicon MCM-41 mesoporous molecular sieves were synthesized by hydrothermal method in alkaline medium. Cu@Ru / MCM- 41 nanometer catalyst, in which the molar ratio of Ru and Cu is 0.15:1, and the Cu@Ru loading is 15wt%, that is, the mass of Cu@Ru accounts for 15% of the total catalyst mass.

[0040] Preparation of all-silicon MCM-41 mesoporous molecular sieve: Dissolve 40 g of sodium silicate in a beaker with 160 mL of distilled water, heat and dissolve 8 g of di-n-propylamine in 80 mL of distilled water, cool to room temperature, stir for 15 min after mixing, and use Sulfuric acid solution (3moL / L) adjusted the pH value of the mixture to 8, and continued stirring for 1 h to make the solution into a viscous transparent gel. Then pack into a 500ml stainless steel hydrothermal kettle with a polytetrafluoroethylene line...

Embodiment 2

[0049] Same as in Example 1, only changing the amount of catalyst: 0.07 g, 0.14 g, 0.28 g, 0.35 g, 0.45 g to carry out the selective hydrogenation reaction of 1-nitroanthraquinone. The product selectivity and raw material conversion rate obtained are shown in Table 1.

[0050] Table 1. Different amounts of Cu@Ru 0.15 / MCM-41 Nanocatalyst Selectively Catalyzes the Hydrogenation of 1-Nitroanthraquinone

[0051]

[0052] It can be found that in Cu@Ru 0.15 In the hydrogenation reaction of 1-nitroanthraquinone selectively catalyzed by / MCM-41 nano-catalyst, with the increase of catalyst dosage, the conversion rate of 1-nitroanthraquinone and the selectivity of the target product will increase.

Embodiment 3

[0054] With embodiment 1, only changing the temperature of reactor is: 70 o C. 110 o C. 130 o C, 150 o C carries out the selective hydrogenation reaction of 1-nitroanthraquinone. The resulting product selectivity and feedstock conversion are shown in Table 2.

[0055] Table 2. Cu@Ru at different reaction temperatures 0.15 / MCM-41 Nanocatalyst Selectively Catalyzes the Hydrogenation of 1-Nitroanthraquinone

[0056]

[0057] It can be found that in Cu@Ru 0.15 / MCM-41 nano-catalyst selectively catalyzes the hydrogenation reaction of 1-nitroanthraquinone. The increase of reaction temperature is beneficial to the conversion of 1-nitroanthraquinone into the target product 1-aminoanthraquinone. The reaction temperature is 130°C At that time, the conversion rate of 1-nitroanthraquinone to target product 1-aminoanthraquinone was 99.8%.

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Abstract

The invention relates to a Cu@Ru/MCM-41 nanocatalyst, and a preparation method and an application thereof, and belongs to the field of nanocatalyst studies. A full-silicon MCM-41 mesoporous molecular sieve and nano-Cu particles are synthesized, and the Cu@Ru/MCM-41 nanocatalyst is prepared in the presence of an organic modifier. The surface of large-grain nano-Cu is wrapped with nano-Ru to form a heterojunction type Cu@Ru shell-core structure, and the Cu@Ru shell-core structure is loaded on a porous component MCM-41, so the dispersiveness of the active component Ru is greatly increased, thereby the active component Ru exposes many active sites, and the catalyst has a good hydrogenation performance; the Cu@Ru/MCM-41 nanocatalyst prepared in the invention has high catalytic activity and stability when catalyzing the hydrogenation of 1-nitroanthraquinone to produce 1-aminoanthraquinone; and the preparation method has the advantages of simple process route, small dosage of the catalyst, greenness and environmental friendliness, and meets industrialization requirements.

Description

technical field [0001] The invention relates to a Cu@Ru / MCM-41 nano-catalyst and its preparation method and application, belonging to the field of nano-catalyst research. [0002] technical background [0003] 1-Aminoanthraquinone is mainly used in the production of anthraquinone dyes, such as bromic acid, acid blue 78, disperse red RLZ, disperse brilliant red E.RLN, disperse red FB, reduced olive T, reduced olive green B, reduced olive green 5G , Reduced gray M, reactive brilliant blue X-BR, reactive brilliant blue KN-R and other raw materials. 1-Aminoanthraquinone can also be used in the production of inks, coatings and pigments. 2 o 2 Catalysts, photosensitizing dyes and electrode materials for dye-sensitized solar cells. [0004] With the development of my country's dyestuff industry, the demand for 1-aminoanthraquinone is very large. In recent years, the domestic demand for anthraquinone dyes has exceeded 8,000 tons per year, and has increased year by year with a grow...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/03B01J29/04B01J35/10C07C221/00C07C225/34B82Y30/00B82Y40/00
CPCB01J29/0333B01J37/0018B01J35/1023B01J35/1061C07C221/00C07C2603/24
Inventor 林青鲁王爱丽殷恒波伍银环杨晨晨
Owner JIANGSU UNIV
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