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Palladium-molybdenum bimetallic catalyst as well as preparation method, preparation equipment and application thereof

A bimetallic catalyst and crystallization technology, applied in catalyst activation/preparation, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems that the reaction kettle cannot be carried out, the time is long, and the discovery is not found, so as to strengthen the experimental time and process. Control, reduce impact, reduce the effect of usage

Active Publication Date: 2021-11-23
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In addition, the synthesis of palladium-molybdenum bimetallic catalysts is used to directly catalyze the preparation of 5-hydroxymethylfurfural from cellulose sources. As a new experimental scheme, manual experimental preparation is currently required. Due to the long time of the entire experimental process, personnel need to be on duty for a long time and operation
At present, the container of the process chemical reaction is mainly the reactor, but the reactor cannot carry out the roasting process with the same effect. Suitable for experiments with automated equipment
However, experimental equipment suitable for this synthesis process has not yet been found

Method used

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  • Palladium-molybdenum bimetallic catalyst as well as preparation method, preparation equipment and application thereof
  • Palladium-molybdenum bimetallic catalyst as well as preparation method, preparation equipment and application thereof
  • Palladium-molybdenum bimetallic catalyst as well as preparation method, preparation equipment and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] A preparation method of a palladium-molybdenum bimetallic catalyst, comprising the following steps:

[0054] (1) NaAlO 2 , The first lye and deionized water are mixed according to the molar ratio of 1: (0.5-10): (50-1000), and the SiO 2 with NaAlO 2 The molar ratio is 1: (10-40) by adding SiO 2 Carrying out crystallization, after the crystallization is completed, filtering, washing, drying and roasting to obtain sodium mordenite;

[0055] Among them, the crystallization temperature is 100-300°C, the crystallization time is 10-80h, the drying temperature is 50-150°C, the drying time is 1-10h, the roasting temperature is 400-700°C, and the roasting time is 5-10h;

[0056] (2) The sodium mordenite, template agent, second lye, alcohol solution and deionized water are mixed according to the molar ratio of 1: (0.1-50): (1-100): (1-700): (200-2000) mixed in a ratio of 2000 to 2000 for alkalization treatment, and the product after alkalization treatment was filtered and was...

Embodiment 2

[0066] Such as Figure 2-7 Shown, a kind of equipment for preparing palladium molybdenum bimetallic catalyst comprises:

[0067] Such as figure 2 As shown, the reaction vessel moving module is used to move the reaction vessel 8 to different experimental stations, including the installation main board 1, the left and right movement module 3, the front and rear guiding cylinders 5, and the air claws 7 for clamping the reaction vessel 8. The installation main board 1 is provided with a left and right moving module 3, the front and rear guide cylinder 5 is installed on the sliding part of the left and right moving module 3 through the cylinder mounting plate 4, and the air claw 7 is installed through the air claw mounting plate 6 On the sliding part of the front and rear guide cylinder 5;

[0068] Such as Figure 3-5 As shown, the feeding and mixing module includes a temperature control platform 9, a feeding cylinder 10, a stirring and lifting cylinder 12, an agitator 13, an a...

Embodiment 3

[0077] Such as figure 2 As shown, the reaction vessel 8 can be clamped by the air claws 7, and moves back and forth, left and right under the action of the left and right moving module 3 and the front and rear guiding cylinder 5. The left and right movement module 3 moves to the first position corresponding to the feeding and stirring position of the reaction vessel 8, the left and right movement module 3 moves to the second position corresponding to the filter washing position of the reaction vessel 8, and the left and right movement module 3 to the third position corresponds to the reaction vessel 8. Roasting position.

[0078] A preparation method of a palladium-molybdenum bimetallic catalyst, comprising the following steps:

[0079] Take 29g SiO 2 (Station II), 20 g of cetyltrimethylammonium bromide template agent (CTMABr) (Station III), and 2 g of microcrystalline cellulose powder (Station IV) were loaded into 3 boxes of 16 The stations are respectively recorded as st...

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Abstract

The invention discloses a palladium-molybdenum bimetallic catalyst as well as a preparation method, preparation equipment and application thereof. Sodium mordenite and hydrogen mordenite are sequentially prepared, the palladium-molybdenum bimetallic catalyst is obtained through an ion exchange method, a carrier of the prepared palladium-molybdenum bimetallic catalyst is mordenite, and active components of the prepared palladium-molybdenum bimetallic catalyst are palladium and molybdenum. Under a hydrothermal condition and a nitrogen atmosphere, the palladium-molybdenum bimetallic catalyst can directly catalyze a cellulose source to obtain 5-hydroxymethylfurfural with higher yield. The invention further discloses the preparation equipment of the palladium-molybdenum bimetallic catalyst, wherein the preparation equipment comprises a reaction vessel moving module, a feeding and stirring module, a filtering and washing module, a muffle furnace and a reaction vessel, and the equipment can be controlled by a computer to perform operations such as solution adding, solid reagent adding, stirring, filtering, washing, drying and roasting on a reaction vessel according to a specific process.

Description

technical field [0001] The invention belongs to the technical field of solid catalysts, and in particular relates to a palladium-molybdenum bimetallic catalyst for catalyzing the direct hydrolysis of cellulose sources to prepare 5-hydroxymethylfurfural, a preparation method and preparation equipment thereof. Background technique [0002] The current resource crisis and environmental pollution have become global issues affecting countries all over the world. Biomass, as the only renewable carbon source, is expected to be used as energy to replace fossil energy. Cellulose is the most abundant biomass resource with the simplest structural composition, which is recyclable, easily biodegradable, and cheap. Therefore, it is of great practical significance to convert cellulose into high value-added chemicals or fuels through chemical or fermentation treatment. [0003] 5-Hydroxymethylfurfural is a high value-added platform compound that can be prepared by dehydrating monosacchari...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/26B01J37/30C07D307/46
CPCB01J37/30B01J29/26C07D307/46B01J2229/38B01J2229/18Y02P20/584
Inventor 阎智锋冯宇宋云彩李跃斌侯文生史晟
Owner TAIYUAN UNIV OF TECH
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