COFFEE MELANOIDIN NANOPARTICLES AND NANOFIBERS

The invention relates to a process for preparing a melanoidin product, the process comprising:a) an extraction step in which coffee grounds are treated with an extraction agent with a pH value greater than 7 to extract a melanoidin-containing solute in a fluid phase of the extraction agent;b) a firs...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	Medina, Juan, Ascensão Aroso, Ivo Manuel, Gonçalves dos Reis, Rui Luis, de Sá Bessa, Ricardo, Akcay, Adnan
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	COFFEE FOODS OR FOODSTUFFS FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BYSUBCLASSES A23B - A23J HUMAN NECESSITIES HYGIENE MANUFACTURE, PREPARATION, OR INFUSION THEREOF MEDICAL OR VETERINARY SCIENCE PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL TEA THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OFNUTRITIVE QUALITIES, PHYSICAL TREATMENT THEIR SUBSTITUTES THEIR TREATMENT, NOT COVERED BY OTHER CLASSES
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Beschreibung
Zusammenfassung:	The invention relates to a process for preparing a melanoidin product, the process comprising:a) an extraction step in which coffee grounds are treated with an extraction agent with a pH value greater than 7 to extract a melanoidin-containing solute in a fluid phase of the extraction agent;b) a first separation step in which the fluid phase is separated from the coffee grounds;c) a precipitation step in which the fluid phase is contacted (i) with an acid to obtain an acidic mixture with a pH value lower than 4 or (ii) with an organic phase separation agent and with an acid to obtain a mixture with a pH value in the range of from 4 to 8, thereby forming precipitates containing melanoidin; andd) a second separation step in which the formed precipitates are separated from the acidic mixture.The invention further relates to melanoidin nanoparticles and melanoidin nanofibers obtained from coffee grounds.