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Polyacid catalyst, preparation method and use method thereof

An acid catalyst and catalyst technology, which are applied in the preparation of carbon-based compounds, chemical instruments and methods, preparation of organic compounds, etc., to achieve the effects of reducing the use cost, the regeneration method is simple, and the operation is simple

Active Publication Date: 2017-06-30
BEIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use in catalyzing the directional conversion of lignocellulose has not been reported so far

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Weigh the polyacid compound K with a molar ratio of 1:4 5 [PW 11 TiO 40 ]·6H 2 O and surfactant [C 16 H 33 (CH 3 ) 3 N]Br; the polyacid compound K 5 [PW 11 TiO 40 ]6H 2 Pour O into the reactor, add 6 times the mass ratio of distilled water, heat to 60°C, stir to dissolve; then add surfactant, the reaction solution is aged for 7 hours, a white solid is precipitated, filtered, and the precipitate is washed with distilled water Three times, until the pH value of the eluate reaches 7.1, a precipitate is obtained; the precipitate is placed in a muffle furnace and sintered at 170°C for 2 hours to obtain a polyacid catalyst for the directional conversion of lignocellulose. The rate is 50%.

Embodiment 2

[0024] The lignocellulose 1g, 30mg [C 16 H 33 (CH 3 ) 3 N] 5 [PW 11 TiO 40 ]·6H 2 The O catalyst was put into a high-pressure reactor, and 6 mL of deionized water was added, and heated and stirred. The reaction temperature is 100°C, and the reaction time is 8 hours. After the reaction is completed, the reaction mixture is placed in a centrifuge tube for centrifugal separation after cooling. The clear liquid contains the product glucose, xylose and vanillin, and the precipitate contains unreacted lignocellulose and catalyst. The product was extracted twice with methyl isobutyl ketone, and the organic phase was distilled under reduced pressure at 40°C to distill out methyl isobutyl ketone to obtain the product vanillin; the aqueous phase was extracted with ethanol, and the ethanol phase was distilled under reduced pressure at 40°C to obtain the ethanol. Glucose; the remaining water phase was distilled under reduced pressure at 50°C to distill water to obtain xylose; the yields we...

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Abstract

The invention discloses a polyacid catalyst for catalyzing oriented conversion of lignocellulose and a preparation method thereof. The polyacid catalyst is a polyacid compound with a Keggin structure and can be adopted for catalyzing the lignocellulose to prepare glucose, xylose and oxalaldehyde. The catalyst disclosed by the invention is high in catalytic activity and repeatability and wide in material applicability, and in the whole preparation process, no waste water is generated, and the green and environment-friendly effects are achieved.

Description

Technical field [0001] The invention relates to the technical field of catalyst preparation and application, and specifically relates to a new nano-solid polyacid catalyst. At the same time, the invention also relates to the preparation of the nano-catalyst and its application in the directional conversion of lignocellulose. Background technique [0002] In the 21st century, the development of modern society is facing serious problems such as resource shortage, energy crisis and environmental degradation. The shortage of fossil resources has become one of the bottleneck factors of global economic development. Therefore, various countries have put forward corresponding development strategies. In order to protect the environment and save energy, people have focused their attention on renewable resources. Biomass materials and energy are gradually emerging, and the development of the biomass industry has become an important development strategy for my country. Biomass exists widely ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/18B01J27/188C07H3/02C07H1/00C07C45/51C07C47/58C07C49/04
Inventor 时君友王晓红段喜鑫李翔宇
Owner BEIHUA UNIV
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