Comprehensive utilization process of coffee grounds

A technology of coffee grounds and processes, applied in the fields of extraction and separation of natural compounds and reuse of biomass wastes

Pending Publication Date: 2021-09-24
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, few people have proposed the idea of ​​comprehensive utilization of coffee grounds, and for this waste resource, it is necessary to fully explore its maximum reuse value to promote its resource utilization

Method used

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  • Comprehensive utilization process of coffee grounds
  • Comprehensive utilization process of coffee grounds

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Weigh 5.0 g of crushed dry coffee grounds powder, add 75 mL of petroleum ether, set the temperature of the water bath at 30 ° C, extract for 90 min, and extract by heating and reflux;

[0024] (2) After the extraction is completed, remove the residue by filtration, take 15 mL of petroleum ether to wash the residue and combine it with the extract, concentrate the filtrate to remove the solvent completely, and obtain 0.6265 g of coffee oil product, with an extraction rate of 12.53%, and dry the residue for future use.

Embodiment 2

[0026] (1) Weigh 5.0 g of crushed dry coffee grounds powder, add 75 mL of petroleum ether, set the temperature of the water bath at 70 ° C, extract for 150 min, and extract by heating and refluxing;

[0027] (2) After the extraction is completed, remove the residue by filtration, take 15 mL of petroleum ether to wash the residue and combine it with the extract, concentrate the filtrate to remove the solvent completely, and obtain 0.7415 g of coffee oil product, with an extraction rate of 14.83%, and dry the residue for future use.

Embodiment 3

[0029] (1) Weigh 5.0 g of crushed dry coffee grounds powder, add 75 mL of petroleum ether, set the temperature of the water bath at 50 ° C, extract for 210 min, and extract by heating and refluxing;

[0030] (2) After the extraction is completed, remove the residue by filtration, take 15 mL of petroleum ether to wash the residue and combine it with the extract, concentrate the filtrate to remove the solvent completely, and obtain 0.7460 g of coffee oil product with an extraction rate of 14.92%, and dry the residue for future use.

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Abstract

The invention provides a comprehensive utilization process of coffee grounds. Coffee grounds are used as a raw material, a step-by-step extraction process according to polarity difference is provided for valuable components in the coffee grounds, lipid, chlorogenic acid, caffeine, trigonelline, polysaccharide and other components in the coffee grounds are extracted, a carbon adsorption material is prepared to achieve value-added utilization of residual residues, and the method belongs to the field of natural compound extraction and separation and waste reutilization. The specific process comprises the following steps: firstly, extracting lipid components in coffee grounds by using petroleum ether; extracting alkaloid and phenolic acid components with an ethanol aqueous solution; extracting polysaccharide by a hydrothermal method by taking water as a solvent; and activating residual residues by using solid zinc chloride to prepare the activated carbon with adsorption performance. The process route realizes value-added and waste-free utilization of the coffee grounds.

Description

technical field [0001] The invention provides a comprehensive utilization process of coffee grounds, specifically extracting components such as lipids, alkaloids, phenolic acids, and polysaccharides from coffee grounds, and then preparing the remaining residues into activated carbon to realize the comprehensive utilization of waste coffee grounds. Utilization belongs to the fields of extraction and separation of natural compounds and reuse of biomass waste. Background technique [0002] Coffee is one of the most popular beverages in the world. Coffee grounds are a by-product of the coffee industry, accounting for about 2 / 3 of the quality of coffee dry beans, and the annual production of coffee grounds can reach 6 million tons. Coffee grounds contain biologically active substances such as lipids, polysaccharides, caffeine, and chlorogenic acid, as well as organic substances such as lignin and cellulose, which can be used as a source of related value-added products. However, ...

Claims

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Application Information

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IPC IPC(8): B01D11/02C10B53/02C11B1/10
CPCB01D11/02C10B53/02C11B1/10Y02E50/10Y02E50/30
Inventor 孙立权张鹏科罗爱芹
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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