Catalysts for preparing gamma-valerolactone as well as preparation method and application of catalysts

A valerolactone and catalyst technology, applied in the field of ruthenium-based catalysts and their preparation, can solve problems such as poor recycling performance and inability to industrialize, achieve good dispersibility, improve economy, and overcome the effects of high loading of precious metals

Inactive Publication Date: 2018-06-05
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, Ru / C has the highest activity among ruthenium-based catalysts, but the poor recycling performance of Ru / C in this reaction system has become a difficulty in its industrialization.

Method used

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  • Catalysts for preparing gamma-valerolactone as well as preparation method and application of catalysts
  • Catalysts for preparing gamma-valerolactone as well as preparation method and application of catalysts
  • Catalysts for preparing gamma-valerolactone as well as preparation method and application of catalysts

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Embodiment Construction

[0017] The present invention will be described below with specific examples, but the protection scope of the present invention is not limited to these examples.

[0018] 1. Preparation of catalyst

[0019] Weigh 0.28g of zirconium chloride and dissolve it in 40mL of DMF, add 0.232g of terephthalic acid to it, add a certain amount of glacial acetic acid and RuCl 3 The solution was sonicated for 30min and then transferred to a 100mL hydrothermal reaction kettle. The reaction kettle was placed in a programmed temperature-controlled oven, and the heating rate was set to 1°C / min, heated at 120°C for 24h, then slowly lowered to room temperature (24h), filtered, DMF washed three times, H 2 O washed three times and baked at 60 °C overnight to obtain UiO-66 or Ru@UiO-66 materials. Subsequently, the UiO-66 or Ru@UiO-66 sample was transferred to a tube furnace, raised to 600-800°C at a heating rate of 5°C / min, calcined under nitrogen atmosphere for 4-8 h, and ZrO was obtained after nat...

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Abstract

The invention relates to a type of catalysts for preparing gamma-valerolactone as well as a preparation method and application of the catalysts. The catalysts are prepared through thermal treatment bytaking a metal organic framework material UiO-66 as a precursor. By utilizing the catalysts, acetylpropionic acid can be completely converted and hydrogenated into gamma-valerolactone, and the selectivity of gamma-valerolactone can reach 99.9%. According to the catalysts, the disadvantages that the load capacity of active metals is high, the temperature and the pressure are high, an organic solvent is used, the cycle use performance is poor, and the like in an existing process are overcome, so that the catalysts have potential industrial application values.

Description

technical field [0001] The invention relates to a ruthenium-based catalyst for preparing γ-valerolactone from levulinic acid and a preparation method thereof. The catalyst is obtained after heat treatment by using metal-organic framework material UiO-66 as a precursor. This kind of catalyst can completely convert levulinic acid into γ-valerolactone by hydrogenation under mild conditions, and the selectivity of γ-valerolactone can reach 99.9%. The invention overcomes the disadvantages of high active metal loading, high temperature and high pressure, use of organic acids and bases and organic solvents, and poor recycling performance in the prior art, so the catalyst has potential industrial application value. Background technique [0002] Energy crisis and environmental pollution have become the key problems restricting the sustainable development of society and economy. Therefore, it is urgent to seek and develop renewable energy and efficient alternative energy. Biomass en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/46C07D307/33
CPCB01J23/462B01J35/0073B01J37/086C07D307/33Y02P20/584
Inventor 王爱琴曹文秀张涛
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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