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A kind of quaternary ammonium salt perrhenate ionic liquid and its synthesis method and application

A technology of ionic liquid and perrhenate, which is applied in the fields of application, chemical instruments and methods, sugar production, etc., and can solve problems such as catalysts that have not been prepared

Active Publication Date: 2018-06-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Rare metal ionic liquids are novel green catalysts with catalytic activity towards lignocellulose, but no effective catalysts have been prepared so far

Method used

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  • A kind of quaternary ammonium salt perrhenate ionic liquid and its synthesis method and application
  • A kind of quaternary ammonium salt perrhenate ionic liquid and its synthesis method and application
  • A kind of quaternary ammonium salt perrhenate ionic liquid and its synthesis method and application

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Experimental program
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Embodiment 1

[0027] Dissolve tetramethylammonium bromide and KOH in a certain amount of absolute ethanol solution respectively, wherein the molar ratio of tetramethylammonium bromide and KOH is 1:1.1, stir and react at room temperature for 12 hours, white potassium bromide Precipitation, filtration to remove potassium bromide precipitate, to obtain tetramethyl quaternary ammonium base ethanol solution. Add NH to the ethanol solution of the obtained tetramethylquaternary ammonium base 4 ReO 4 , where the quaternary ammonium base and NH 4 ReO 4 The molar ratio is 1:1.1, heated to 60°C for gentle reflux for 1h (use pH test paper to check whether ammonia gas is released), then lower the temperature to room temperature and stir for 24h, white solids (tetramethylperrhenic acid) are continuously precipitated Ammonium is insoluble in ethanol), after the reaction is completed, filter to obtain a white solid, wash with distilled water, and then dry in a vacuum oven at 40°C for 6 hours to obtain p...

Embodiment 2

[0029] Dissolve tetraethylammonium bromide and KOH in a certain amount of absolute ethanol solution respectively, wherein the molar ratio of tetraethylammonium bromide and KOH is 1:1.1, stir and react at room temperature for 10 h, white bromide Potassium is precipitated, and the potassium bromide precipitate is removed by filtration to obtain an ethanol solution of tetraethyl quaternary ammonium base. Add NH to the obtained ethanol solution of tetraethylammonium base 4 ReO 4 , where the quaternary ammonium base and NH 4 ReO 4 The molar ratio is 1:1.1, heated to 50°C for gentle reflux for 1.5h (use pH test paper to check whether ammonia gas is released), then lower the temperature to room temperature and stir for 24 h, filter after the reaction to remove excess perrhenium Ammonium perrhenate and potassium perrhenate produced by the reaction with KOH remaining in the solution, the filtrate was removed by a rotary evaporator to remove most of the ethanol solution, and then dri...

Embodiment 3

[0031] Dissolve 1-butyl(triethyl)ammonium bromide and KOH in a certain amount of absolute ethanol solution respectively, wherein the molar ratio of 1-butyl(triethyl)ammonium bromide to KOH is 1:1.1, The reaction was stirred at room temperature for 15 h, and the potassium bromide precipitate was removed by filtration to obtain an ethanol solution of butyl triethyl quaternary ammonium base. Add NH4ReO to the ethanol solution of the obtained butyltriethylammonium base 4 , where the quaternary ammonium base and NH 4 ReO 4 The molar ratio is 1:1.1, heated to 70 ℃ for gentle reflux for 0.5h (use pH test paper to check whether ammonia gas is released), then lower the temperature to room temperature and stir for 24h, filter after the reaction to remove excess perrhenic acid Ammonium and the potassium perrhenate produced by the reaction with KOH remaining in the solution, the filtrate was removed by a rotary evaporator to remove most of the ethanol solution, and then dried in a vacuu...

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Abstract

The invention discloses a quaternary ammonium salt perrhenate ionic liquid and its synthesis method and application. Firstly, the quaternary ammonium base is obtained by reacting alkyl ammonium bromide with KOH, and then the quaternary ammonium base and perrhenate (NH4ReO4 ) metal salt for displacement reaction to obtain quaternary ammonium salt perrhenate ionic liquid. The quaternary ammonium salt perrhenate ionic liquid synthesized in the invention is a green catalyst, has catalytic activity to lignocellulose, can be used as a catalyst to degrade lignocellulose to prepare reducible sugar, and obtain higher yield.

Description

technical field [0001] The invention relates to a quaternary ammonium salt perrhenate ionic liquid and a synthesis method and application thereof. The synthesized ionic liquid can be used as a catalyst to efficiently degrade cellulose to prepare reducible sugar. Background technique [0002] With the aggravation of climate warming, environmental pollution and the depletion of fossil energy, people are paying more and more attention to the development and utilization of biological and alternative energy. Biomass is one of the most abundant resources in the world. The use of lignocellulose-rich rice straw, straw and other agricultural and forestry wastes to produce energy materials or chemicals has become a research hotspot in recent years. Cellulose is the main component of lignocellulose, which can be degraded into a variety of high value-added multi-platform compounds, but most platform compounds must be synthesized by biomass conversion technology based on reducible sugars...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C211/63C07C209/00B01J31/02C13K13/00C13K1/02
Inventor 周明东张全王景芸臧树良王欣
Owner CHINA PETROLEUM & CHEM CORP
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