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Preparation method of metal-acid-base function integrated catalyst and application of metal-acid-base function integrated catalyst in catalytic cracking of lignin ether bonds to prepare aromatic substances

A catalyst quality and catalyst technology, applied in the direction of catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, organic compound preparation, etc., can solve problems such as difficult recovery, achieve separation and recovery difficulties, and avoid a large amount of The effect of low energy consumption for acid/alkali, reaction and separation

Inactive Publication Date: 2020-12-15
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the combination catalysis of these metals and acid / base functional coupling has the problem of difficult recovery.

Method used

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  • Preparation method of metal-acid-base function integrated catalyst and application of metal-acid-base function integrated catalyst in catalytic cracking of lignin ether bonds to prepare aromatic substances
  • Preparation method of metal-acid-base function integrated catalyst and application of metal-acid-base function integrated catalyst in catalytic cracking of lignin ether bonds to prepare aromatic substances
  • Preparation method of metal-acid-base function integrated catalyst and application of metal-acid-base function integrated catalyst in catalytic cracking of lignin ether bonds to prepare aromatic substances

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1: Preparation of PD / MGO-C and Its Catalytic Performance Experiment

[0027] (1) Weigh 0.36 g of nine hydrogen nitrate and 0.17 g of citric acid into the crucible, add 3 ml of deionized water, and then add 1.0 g of nano magnesium oxide after stirring, and continue to stir in liquid volatiles at 80 ° C, The sample was then placed in a muffle furnace, and then warmed to 450 ° C for 2 h. After the calcination, the sample was transferred to the reduced tube, and 2 h was reduced by hydrogen at 500 ° C. Subsequently, the reducing furnace was heated to 700 ° C, and hydrogen was switched into nitrogen and purged for 60 min, and the furnace temperature was continued to adjust the heat treatment temperature of 1000 ° C. Nitrogen in 50 ~ 80 ml / min is mixed with methanol vapor by methanol steam generator (65 ° C water bath), and mixed gas enters the reduction furnace to modify MGO, and the mixed air access time is 10 min. Stopping the heating procedure after the mixture is ...

Embodiment 2

[0030] Example 2: Preparation of RU / MGO-C and its catalytic performance experiment

[0031] (1) in the same manner (1) in the first embodiment.

[0032] (2) Weigh 0.136 g of Rucl3, dissolved in 2.5 ml of anhydrous ethanol, continuously stirred and added 0.5 g of MgO-C sample, and uniformly dispersed the solid, stirred to ethanol all volatilize 2 h. After drying sample was ground, 2 h was reduced at 300 ° C (10 min) to obtain a Ru / MgO-C catalyst, and its SEM map see figure 1 .

[0033] (3) Take 0.1 mmol dimer-creator chipphenol-glycerol-β-创 木 醚, 25 ml of ethyl acetate / water two-phase solvent (ethyl acetate / water = 4: 1, v / v) and 50 mGRU / mgO-C catalyst was added to 50 mL of Hakobloy reactor, and the gas was sealed with hydrogen. The gas was used for 3 times, and 15bar hydrogen was charged, the reaction temperature was 140 ° C, the reaction was 4 h, and the stirring speed was 500 rpm. The results of the reaction are shown in Table 1.

Embodiment 3

[0034] Example 3: Preparation of CO / MGO-C and Its Catalytic Performance Experiment

[0035] (1) in the same manner (1) in the first embodiment.

[0036] (2) Weigh 0.331G COCL 2 , Dissolved in 2.5 ml of anhydrous ethanol, continuously stirred and added 0.5 g of MgO-C sample, and uniformly dispersed the solid, stirred until all volatilizers were volatilized after each volatilization of 100 ° C for 2 h. After drying samples were ground, 2 h was reduced in a 600 ° C reduction furnace (warmed by 30 min) to give a CO / MgO-C catalyst. SEM map figure 1 .

[0037] (3) Take 0.1 mmol dimer-creator chipphenol-glycerol-β-创 木 醚, 25 ml of ethyl acetate / water two-phase solvent (ethyl acetate / water = 4: 1, v / v) and 50 mg CO / MgO-C catalyst was added to 50 mL of the Hanse alloy reaction kettle, and the gas was sealed with hydrogen gas 3 times, and 15bar hydrogen was charged, the reaction temperature was 140 ° C, the reaction was 4 h, and the stirring velocity was 500 rpm. The results of t...

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Abstract

The invention discloses a preparation method of a metal-acid-base function integrated catalyst and application of the metal-acid-base function integrated catalyst in catalytic cracking of lignin etherbonds to prepare aromatic substances. A MgO hydrophilic end and a C grafted metal hydrophobic end in the catalyst respectively complete selective catalytic conversion reaction in a two-phase solvent;meanwhile, a metal center and an acid / alkali active center with hydrogen treatment activity realize low-temperature efficient catalytic fracture conversion in a lignin ether bond two-phase system, the selectivity and yield of converting lignin into a monomer aromatic substance are improved, the complexity of the product is reduced, meanwhile, an amphiphilic interface catalyst is easy to recover;and the problem that separation and recovery of catalysts, products and solvents are difficult in the prior art is solved.

Description

Technical field: [0001] The present invention relates to a metal - acid functional integration Application catalyst preparation and their catalytic lignin ether bond breaking of the aroma system. Background technique: [0002] Lignin is a complex three-dimensional amorphous polymer, a methoxyphenyl propane and derivatives thereof, about 15 to 35% of lignocellulosic biomass. Currently, the world's paper and pulp industry produced annually than 50 million tons of lignin, with the rapid development of lignocellulosic biomass as a feedstock second-generation bioethanol, 2030 will produce 220 million tons of lignin. However, more than 98% of the carbohydrates are treated as waste, and burned for heating. Lignin as the sole repository of aroma, as a potentially abundant production of fuels and chemicals from renewable resources. [0003] Lignin is an aromatic monomeric p-coumaric alcohol, rosin and sinapyl alcohol units by three-dimensional polymer compound C-C and C-O linkages in a co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/44B01J23/46B01J23/75B01J37/18C07C41/18C07C43/23C07C45/00C07C45/51C07C45/52C07C47/277C07C49/84C07C49/255
CPCB01J23/58B01J23/78B01J37/18B01J37/0036C07C41/18C07C45/00C07C45/51C07C45/52C07C43/23C07C47/277C07C49/84C07C49/255
Inventor 吕微王晨光徐莹朱妤婷马隆龙张琦皮奇峰王文锦
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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