Biphasic catalyst, preparation method thereof and application of biphasic catalyst in lignocellulose biomass conversion

A technology of lignocellulose and catalyst, applied in the conversion of lignocellulose biomass, two-phase catalyst and its preparation field, can solve the problems of a large amount of waste acid and alkali, equipment corrosion, harsh operating conditions, etc., and achieve equipment corrosion The effect of low cost, reduced processing cost, and low production cost

Active Publication Date: 2021-08-24
HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the harsh operating conditions, severe corrosion of equipment, and the generation of a large amount of waste acid and alkali in the method for converting lignocellulose in the prior art, the present invention provides a two-phase catalyst and its preparation method and its use in lignocellulose For application in biomass conversion, the present invention achieves the purpose of one-pot catalytic conversion of lignocellulose through a two-phase catalyst system composed of a hydrophilic phase catalyst and a hydrophobic phase catalyst, simplifying industrial dissolution, hydrolysis, saccharification and reprocessing. The complex steps of extraction realize the efficient degradation of lignocellulose, which is of great significance for the resource utilization of lignocellulosic biomass solid waste

Method used

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  • Biphasic catalyst, preparation method thereof and application of biphasic catalyst in lignocellulose biomass conversion
  • Biphasic catalyst, preparation method thereof and application of biphasic catalyst in lignocellulose biomass conversion

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Embodiment 1

[0044]Embodiments of the present invention provide a dual-phase catalyst, comprising a hydrophilic phase and a hydrophobic phase, wherein the hydrophilic phase is composed of tetrabutylammonium bromide and FeCl with a molar ratio of 3:1 3 ·6H 2 A deep eutectic solvent composed of O, and the hydrophobic phase is a deep eutectic solvent composed of tetraphenylammonium borate and capric acid in a molar ratio of 10:1.

[0045] The preparation method of above-mentioned biphasic catalyst comprises the steps:

[0046] Step a, according to design ratio, with 0.6mol tetrabutylammonium bromide and 0.2mol FeCl 3 ·6H 2 O mixed evenly, heated to 65°C, and stirred at constant temperature for 2 hours to obtain a uniform and transparent hydrophilic phase;

[0047] Step b, according to the design ratio, mix 0.5mol tetraphenylammonium borate and 0.05mol capric acid evenly, heat to 100°C, and stir at constant temperature for 2.5h to obtain a uniform and transparent hydrophobic phase;

[0048...

Embodiment 2

[0057] Embodiments of the present invention provide a dual-phase catalyst, comprising a hydrophilic phase and a hydrophobic phase, wherein the hydrophilic phase is composed of (1-butyl) triethylammonium bromide and FeCl with a molar ratio of 1:1 3 ·6H 2 A deep eutectic solvent composed of O, and the hydrophobic phase is a deep eutectic solvent composed of ammonium phosphomolybdate and capric acid with a molar ratio of 5:1.

[0058] The preparation method of above-mentioned biphasic catalyst comprises the steps:

[0059] Step a, according to design ratio, with 0.6mol (1-butyl) triethyl ammonium bromide and 0.6mol FeCl 3 ·6H 2 O mixed evenly, room temperature 25 ° C, constant temperature stirring for 3 hours, to obtain a uniform and transparent hydrophilic phase;

[0060] Step b, according to the design ratio, mix 0.2mol ammonium phosphomolybdate and 0.04mol capric acid evenly, and stir at a room temperature of 25°C for 5 hours at a constant temperature to obtain a uniform an...

Embodiment 3

[0066] Embodiments of the present invention provide a dual-phase catalyst, comprising a hydrophilic phase and a hydrophobic phase, wherein the hydrophilic phase is composed of tetrapropylammonium bromide and FeCl in a molar ratio of 6:1 3 ·6H 2 A deep eutectic solvent composed of O, and the hydrophobic phase is a deep eutectic solvent composed of cetyltrimethylammonium bromide and capric acid in a molar ratio of 4:1.

[0067] The preparation method of above-mentioned biphasic catalyst comprises the steps:

[0068] Step a, according to design ratio, with 0.6mol tetrapropyl ammonium bromide and 0.1mol FeCl 3 ·6H 2 O mixed evenly, heated to 68°C, and stirred at constant temperature for 2.5h to obtain a uniform and transparent hydrophilic phase;

[0069] Step b, according to the design ratio, mix 0.2mol cetyltrimethylammonium bromide and 0.05mol capric acid evenly, heat to 75°C, and stir at constant temperature for 3.0h to obtain a uniform and transparent hydrophobic phase;

...

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Abstract

The invention relates to the technical field of solid waste treatment, and particularly discloses a biphasic catalyst, a preparation method thereof and application of the biphasic catalyst in lignocellulose biomass conversion. The biphasic catalyst comprises a hydrophilic phase and a hydrophobic phase, wherein the hydrophilic phase is a low-eutectic solvent composed of hydrophilic quaternary ammonium salt and ferric trichloride, and the hydrophobic phase is a low-eutectic solvent composed of insoluble ammonium salt and capric acid. Lignocellulose is converted into glucose through catalysis of ammonium salt in the hydrophobic phase, then the glucose enters the hydrophilic phase and is converted into gluconic acid through catalytic oxidation of ferric trichloride in the hydrophilic phase, and the gluconic acid is precipitated from the hydrophilic phase. Due to the design of the biphasic catalyst, the generated intermediate product glucose can be removed from the hydrophobic phase in time, continuous and efficient proceeding of the lignocellulose degradation conversion reaction is promoted, meanwhile, the glucose entering the hydrophilic phase can be subjected to catalytic oxidation under the catalytic action of ferric trichloride to generate precipitated gluconic acid, automatic separation of products is achieved, and the practical application value is extremely high.

Description

technical field [0001] The invention relates to the technical field of solid waste treatment, in particular to a two-phase catalyst, a preparation method thereof and an application in lignocellulose biomass conversion. Background technique [0002] As a traditional large agricultural country, China inevitably produces a huge amount and variety of agricultural and forestry wastes in the process of agricultural and forestry production. The main component of these agricultural and forestry wastes is lignocellulose, which is the most abundant renewable resource, chemical and material on the earth. However, at present, most of the agricultural and forestry wastes are only treated by incineration and landfill, and have not been rationally developed and use. [0003] Cellulose is a natural polymer composed of gluconic acid units linked by β-1,4 glycosidic bonds. Moreover, the hydroxyl groups in the cellulose molecules tend to form hydrogen bonds with the oxygen-containing groups ...

Claims

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Application Information

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IPC IPC(8): B01J31/02B01J31/04B01J27/128B01J27/19B01J27/135B01J27/24B01J31/14C07C51/00C07C51/235C07C59/105C13K1/02
CPCB01J31/0239B01J31/04B01J27/128B01J27/19B01J27/135B01J27/24B01J31/146C07C51/00C07C51/235C13K1/02B01J2231/70C07C59/105Y02P20/584
Inventor 张子珩任红威梁原顼刘沛浩朱泓宇赵腾达刘佳郝春蕾
Owner HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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