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Molybdenum carbide catalyst as well as preparation method and application thereof

A molybdenum carbide and catalyst technology, applied in the field of polyurethane, can solve the problems of poor thermal insulation of polyurethane, poor biological straw activity, low filling amount, etc., and achieve the effects of good thermal insulation performance, high compressive strength, and optimized electronic structure.

Active Publication Date: 2020-05-08
ZHEJIANG NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the poor activity and low filling amount of biological straw in the prior art when the biological straw is used as a polyurethane raw material, and the production The disadvantage of the poor thermal insulation of the obtained polyurethane, thereby providing a preparation of a molybdenum carbide catalyst, a biopolyol prepared by its catalysis and a polyurethane prepared from the biopolyol

Method used

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  • Molybdenum carbide catalyst as well as preparation method and application thereof
  • Molybdenum carbide catalyst as well as preparation method and application thereof
  • Molybdenum carbide catalyst as well as preparation method and application thereof

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Embodiment 1-8

[0062] Embodiment 1-8 provides a kind of molybdenum carbide catalyst and preparation method thereof, each parameter in molybdenum carbide and preparation method is shown in Table 1; The molybdenum carbide catalyst in embodiment 1-8 is respectively marked as A, B, C, D , E, F, G, H;

[0063] The preparation method of molybdenum carbide catalyst comprises the steps:

[0064] After molybdenum trioxide, imidazole compound and water are mixed and reacted for 12 hours, the precursor of molybdenum carbide is obtained after filtering and drying;

[0065] The molybdenum carbide precursor is first calcined in a hydrogen atmosphere for 2 hours, then the gas is switched to an inert gas, and the temperature is raised to a certain temperature for the second calcining. The calcining time is 6 hours, and then the molybdenum carbide catalyst is obtained after cooling down to room temperature.

[0066] Each parameter in the preparation method of table 1 embodiment 1-8 molybdenum carbide cataly...

Embodiment 9-24

[0071] Embodiment 9-24 provides a kind of preparation method of biopolyol, respectively adopts the molybdenum carbide catalyst prepared in embodiment 1-8 as the catalyst for preparing biopolyol, and the settings of specific parameters are shown in Table 2; biopolyol The preparation method comprises the following steps,

[0072] Corn stalks, molybdenum carbide catalysts, catalytic aids and 100ml of solvent are reacted under anaerobic conditions (passing nitrogen), then cooled to room temperature, filtered, rotary steamed, and biopolyols are obtained after removing residues and solvents; wherein corn stalks, The type, amount and setting of reaction conditions of molybdenum carbide catalyst and catalytic promoter are shown in Table 2.

[0073] Parameters in the preparation method of table 2 embodiment 9-24 biopolyols

[0074]

[0075]

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Abstract

The invention belongs to the technical field of polyurethane preparation, and particularly relates to a molybdenum carbide catalyst, a preparation method of the molybdenum carbide catalyst, biologicalpolyol prepared through catalysis of the molybdenum carbide catalyst and polyurethane prepared from the biological polyol. The molybdenum carbide catalyst prepared by the method can be used for simultaneously breaking chemical bonds in cellulose, hemicellulose and lignin in biological straw; the biological straw is converted from a solid state into the biological polyol which is high in reactionactivity and contains hydroxyl and benzene rings; further, the biological polyol is applied to the preparation of the polyurethane; According to the method, a process route for preparing the polyurethane by taking the biological straw as the raw materials is realized, the problems of low straw filling amount and poor polyurethane performance when the polyurethane is prepared by taking the biological straw as the raw material in the prior art are solved, and the prepared polyurethane has the advantages of low heat conductivity coefficient, good heat preservation performance, high compression strength and the like.

Description

technical field [0001] The invention belongs to the technical field of polyurethane preparation, and in particular relates to a molybdenum carbide catalyst and a preparation method thereof, biopolyols prepared by the catalyst, and polyurethane prepared from the biopolyols. Background technique [0002] Corn is one of the three major food crops in my country. The planting area of ​​corn in my country is about 530 million mu, and the annual production of biological straw reaches 260 million tons. However, the energy density of biological straw is low and the oxygen content is high, which leads to low utilization efficiency of combustion and gasification, which directly break the structure of macromolecules in straw and transform them into energy and small molecular gases. The annual economic loss and environmental pollution caused by straw burning and landfilling cannot be underestimated, and it also causes a great waste of the inherent hydrocarbon components in straw. [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C07C29/00C08H8/00C08G18/64
CPCB01J27/24C07C29/00C08H8/00C08G18/6492
Inventor 马睿王秋月叶博超陈玉芳苏天妹卢信清王宁伟王雪彭安娜许春慧涂高美朱伟东
Owner ZHEJIANG NORMAL UNIVERSITY
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