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Method for catalyzing selective hydrogenolysis of lignin by zirconium phosphate loaded nickel-based material

A nickel-based catalyst and lignin technology, applied in chemical instruments and methods, catalyst activation/preparation, physical/chemical process catalysts, etc., can solve problems such as harsh reaction conditions, high production costs, and expensive raw materials, and achieve equipment The effect of low requirements, low price and simple process conditions

Active Publication Date: 2018-09-21
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantages are that the raw materials are expensive, the production cost is high, and the reaction conditions are harsh.

Method used

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  • Method for catalyzing selective hydrogenolysis of lignin by zirconium phosphate loaded nickel-based material
  • Method for catalyzing selective hydrogenolysis of lignin by zirconium phosphate loaded nickel-based material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: the preparation of catalyst 20wt%Ni / ZrP-2

[0023] (1) Weighing 23.02g of ZrOCl with a purity of 98% 2 ·8H 2 O solid, fully dissolved with 70ml deionized water for use, similarly, weigh 18.77g of NH with a purity of 98.5% 4 h 2 PO 4 The solid was dissolved in 140 ml deionized water. Then pour the two into a 250ml round-bottomed flask in turn, while fully stirring. Filter until a white emulsion is formed, and carefully wash the solid part with deionized water several times until no obvious precipitation is formed. Take the solid part and place it in an oven at 120°C for 12h, and then calcinate it in a muffle furnace at 550°C for 4h, and the obtained white powder is the catalyst carrier ZrP-2.

[0024] (2) Weigh 2.225g of Ni(NO 3 ) 2 ·6H 2 O was dissolved in 0.55 ml of deionized water, and after the dissolution was complete, 2 g of the carrier ZrP-2 prepared in step (1) was added. After immersion for 12 h, it was dried in a 120 °C drying oven for 2...

Embodiment 2

[0026] Embodiment 2: the preparation of 15wt%Ni / ZrP-1

[0027] The difference of this embodiment, such as embodiment 1, is:

[0028] (1) Catalyst carrier raw material ZrOCl 2 ·8H 2 O and NH 4 h 2 PO 4 The amount ratio of substances is 1:1;

[0029] (2) The loading amount of the catalyst active component Ni is 15wt%.

Embodiment 3

[0030] Embodiment 3: the preparation of 15wt%Ni / ZrP-2.5

[0031] The difference of this embodiment, such as embodiment 1, is:

[0032] (1) Catalyst carrier raw material ZrOCl 2 ·8H 2 O and NH 4 h 2 PO 4 The molar ratio of substances is 2.5:1;

[0033] (2) The loading amount of the catalyst active component Ni is 15wt%.

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Abstract

The invention discloses a method for catalyzing selective hydrogenolysis of lignin by a zirconium phosphate loaded nickel-based material. The method is used for preparing a monophenol chemical productthrough the hydrogenolysis. The method comprises the following steps: taking a renewable biomass as a raw material; adding a nickel-based catalyst into an alcohol solution reaction medium; regulatinga phosphorus-zirconium ratio of a carrier in the catalyst and reaction temperature; carrying out selective catalytic hydrogenolysis on the raw material under the conditions that the H2 pressure is 1to 4MPa and the reaction time is 1 to 5h, so as to obtain the monophenol chemical product with high additional value. The phosphorus-zirconium ratio of the carrier in the nickel-based catalyst is 1 to(1 to 3) and the loading amount of Ni is 5 weight percent to 25 weight percent. The conversion rate of the lignin is 85.1 percent and the yield of monophenol is 13.0 percent; the selectivity of 4-ethylphenol is higher than 38.3 percent. The method disclosed by the invention has a simple technology and moderate reaction conditions, and can be used for intermittent and continuous production. The obtained small-molecular product can be used as the chemical product with the high additional value and also can be used as a biomass fuel oil precursor.

Description

technical field [0001] The invention relates to biomass degradation, in particular to a method for preparing monophenolic chemicals (mainly 4-ethylphenol) by selectively catalyzing lignin hydrogenolysis with a nickel-based catalyst; it belongs to the field of high-value utilization of renewable biomass. Background technique [0002] The use of fossil energy has brought great convenience to the development of human society, but it has also brought many problems such as energy crisis and environmental pollution. In recent years, more and more people have turned their attention to clean and renewable resources such as hydropower, wind energy, biomass, and nuclear energy. Among them, renewable lignin resources have attracted widespread attention. Compared with other renewable resources, lignin has the following significant advantages: (1) It has a chemical composition similar to that of traditional fossil energy (mainly composed of three elements, C, H, and O); (3) It is the o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C37/54C07C39/07C07C39/06C07C39/04C07C41/01C07C43/23C07C59/52C07C65/21B01J27/185B01J37/02B01J37/03B01J37/08B01J37/18
CPCC07C37/54C07C41/01C07C51/00B01J27/1853B01J37/0201B01J37/03B01J37/088B01J37/18C07C39/06C07C39/07C07C39/04C07C43/23C07C59/52C07C65/21Y02P20/52C07C37/52C07C41/18B01J37/0207B01J23/755
Inventor 李雪辉马宏卫龙金星赵伟杰李浩维
Owner SOUTH CHINA UNIV OF TECH
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