Method for catalyzing biomass to prepare levulinate by red mud-based catalyst

A technology of levulinic acid ester and catalyst is applied in the field of red mud-based catalyst catalyzing biomass to prepare levulinic acid ester, and achieves the effects of stable performance, simple operation and cost saving of catalyst

Active Publication Date: 2019-08-23
ENERGY RES INST CO LTD HENAN ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of this invention is to provide a kind of red mud-based catalyst catalyzed biomass to prepare the method for levulinic acid ester, to overcome the existing problem in the preparation process of levulinic acid ester at present

Method used

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  • Method for catalyzing biomass to prepare levulinate by red mud-based catalyst
  • Method for catalyzing biomass to prepare levulinate by red mud-based catalyst
  • Method for catalyzing biomass to prepare levulinate by red mud-based catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Example 1 Catalyzing wheat straw to prepare ethyl levulinate

[0026] 5g of wheat straw (40-60 mesh), 1.8g of red mud-based catalyst (the active component is 1-methyl-3-(4-sulfonic acid butyl) imidazole tetraferric chloride with a loading of 5%) After mixing with 75g of absolute ethanol, place it in a high-pressure reaction kettle, raise the temperature to 190°C, and react for 80 minutes. When the cooling water is passed through to cool down to 90°C, the reaction kettle is taken out from the heating kettle, and the temperature continues to drop at room temperature. After cooling down to room temperature, the liquefied product was taken out. The liquefied product is filtered to obtain a liquefied residue and a filtrate.

[0027] Clean the liquefied residue, dry it in an oven at 105°C until it reaches a constant weight, recover the red mud containing the magnetic ionic liquid by using the principle of a magnetic field, weigh the residue again and record it as m 1 , calc...

Embodiment 2

[0032] Example 2 Catalyzing poplar wood chips to prepare methyl levulinate

[0033] 3g poplar sawdust (80-100 mesh), 0.6g red mud-based catalyst (the active component is 1-propylsulfonic acid-3-methylimidazolium tetrachloride ferric salt with a loading of 5%) and 60g anhydrous After mixing methanol, put it in a high-pressure reactor, raise the temperature to 200°C, and react for 60 minutes. When the cooling water is passed through to cool down to 90°C, take out the reactor from the heating kettle, and continue to cool down at room temperature. After the temperature of the reactor drops to room temperature , take out the liquefied product. Filter the liquefied product to obtain the liquefied residue and filtrate, wash the liquefied residue, dry the residue at 105°C, recover the catalyst, weigh the residue, and calculate the liquefaction rate, which is 76.33%. At the same time, the washing liquid and the filtrate are rotary evaporated to reclaim the methanol solvent, and water ...

Embodiment 3

[0034] Example 3 Catalyzing rice straw to prepare methyl levulinate

[0035] 5g of rice straw (80-100 mesh), 1.25g of red mud-based catalyst (the active component is 1-propylsulfonic acid-3-methylimidazolium tetrabromide with a loading capacity of 15%) and 75g of anhydrous methanol After mixing, put it in a high-pressure reactor, raise the temperature to 180°C, and react for 90 minutes. When the cooling water is passed through to cool down to 90°C, take out the reactor from the heating kettle, and continue to cool down at room temperature. After the temperature of the reactor drops to room temperature, Remove the liquefied product. Filter the liquefied product to obtain the liquefied residue and filtrate, wash the liquefied residue, dry the residue at 105°C, recover the catalyst, weigh the residue, and calculate the liquefaction rate, which is 73.46%. Simultaneously, washing liquid and filtrate are rotary-evaporated to reclaim methanol solvent, water is added in gained rotary...

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Abstract

The invention belongs to the technical field of biomass utilization and in particular relates to a method for catalyzing biomass to prepare levulinate by a red mud-based catalyst. A catalyst taking red mud as a carrier is adopted in the invention. With the adoption of the catalyst and a corresponding method in the invention, compared with an ordinary liquefaction method, the method in the invention is nontoxic and low in corrosivity. The operation is simple, the raw material liquefaction ratio is high, and the product is high in yield and purity.

Description

technical field [0001] The invention belongs to the technical field of biomass utilization, in particular to a method for preparing levulinate from biomass by catalyzing a red mud-based catalyst. Background technique [0002] my country is a large agricultural country with abundant biomass resources, especially agricultural and forestry waste biomass. The content of cellulose and hemicellulose in this kind of biomass is relatively high, and carbohydrates such as glucose can be obtained after degradation. It can be used as a raw material for the synthesis of important chemical levulinate, and is further used in resins, medicines, spices, coatings, and pesticides. and surfactant industries. The preparation of levulinic acid esters from agricultural and forestry wastes not only improves the utilization rate of agricultural and forestry wastes, but also reduces the preparation cost required by the original production technology of levulinic acid esters, and can also alleviate e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C67/00C07C69/716B01J31/02B01J37/03
CPCB01J31/0285B01J37/03B01J35/0033C07C67/00C07C69/716
Inventor 关倩徐海燕岳峰郜毅于显敬岳增合李自杰陈高峰辛晓菲师新广
Owner ENERGY RES INST CO LTD HENAN ACADEMY OF SCI
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