An apparatus and method for the removal of unwanted taste components from beverages is described. The apparatus provides a method for contacting a oleophilic-absorbing surface and/or hydrophobic-absorbing surface of polymer media with a beverage before, during or after it is dispensed so that undesirable flavors are selectively removed from the beverage without removing desirable flavors improving the enjoyment of its consumption.

The present invention relates to the technical field of deep processing of tea, specifically to a preparation method of tea essences particles. The present invention provides a preparation method of tea essences particles, including a process of extraction, filtration and separation, purification and decontamination, activation of activity and improvement of bioavailability, and spray granulation, which enhances activity and bioavailability of the active ingredient of the tea essences, improves taste of the tea essences, and increases the product yield of the tea essences.

The present invention relates to the technical field of deep processing of tea, specifically to a preparation method of tea essences particles. The present invention provides a preparation method of tea essences particles, including a process of extraction, filtration and separation, purification and decontamination, activation of activity and improvement of bioavailability, and spray granulation, which enhances activity and bioavailability of the active ingredient of the tea essences, improves taste of the tea essences, and increases the product yield of the tea essences.

The disclosure discloses a nicotinamide dummy template surface molecularly imprinted polymer, a preparation method and application thereof, and belongs to the technical field of chemical materials. The preparation method of the disclosure includes the steps of preparing a modified silica gel carrier, preparing a dummy template surface molecularly imprinted polymer and the like. The disclosure uses nicotinamide, a structural analogue of imidacloprid and acetamiprid, as a dummy template to prepare a silica gel surface molecularly imprinted polymer. The polymer not only can effectively avoid pollution caused by the leakage of template molecules, but also can specifically remove imidacloprid and acetamiprid from water-soluble tea extracts. The removal rate of imidacloprid and acetamiprid is greater than 96% and 93%, respectively, and the loss of tea polyphenols in the extracts is less than 10%. In addition, the molecularly imprinted adsorption column prepared by the disclosure can be eluted with ethanol solution, and the eluted adsorption column can be recycled, so the disclosure can be well applied to the preparation technology of tea extracts and has good application prospects.

This disclosure relates to methods, systems and compositions for food coloring. Embodiments disclosed herein may include methods and systems for combining tea leaves and water to form a feed slurry; processing a feed slurry to at least partially remove a tea essence from the feed slurry, thereby obtaining a tea extract with a predetermined amount of one or more of an aroma or a flavor; and adjusting a color of the tea extract, thereby obtaining a coloring agent with a predetermined color-related feature, wherein the coloring agent is added in a predetermined amount to a food product to adjust a color of the food product. Embodiments may also including coloring compositions, which may include a dry tea extract, wherein an essence has been removed from the dry tea extract to a predetermined amount, and a color of the dry tea extract has been adjusted to have a predetermined color-related feature.

This disclosure relates to methods, systems and compositions for food coloring. Embodiments disclosed herein may include methods and systems for combining tea leaves and water to form a feed slurry; processing a feed slurry to at least partially remove a tea essence from the feed slurry, thereby obtaining a tea extract with a predetermined amount of one or more of an aroma or a flavor; and adjusting a color of the tea extract, thereby obtaining a coloring agent with a predetermined color-related feature, wherein the coloring agent is added in a predetermined amount to a food product to adjust a color of the food product. Embodiments may also including coloring compositions, which may include a dry tea extract, wherein an essence has been removed from the dry tea extract to a predetermined amount, and a color of the dry tea extract has been adjusted to have a predetermined color-related feature.

A method of preparing a tea extract can include loading an extraction material into an extraction cell having a first portion and a second portion. The extraction material can include tea leaves. The method can further include introducing a flow of extraction medium through the first portion of the extraction cell. The extraction medium can have a temperature of between 74 C. to 95 C. The method can include, within 50 seconds to 150 seconds of introducing a portion of the flow of extraction medium into the extraction cell, withdrawing from a filter at the second portion of the extraction cell, the tea extract that has been extracted from the extraction material by the portion of the flow of extraction medium introduced into the extraction cell. The tea extract can have a concentration between 4 Brix to 20 Brix.

Methods for modulating the bitterness and astringency of green tea, and nutritional products having a green tea with reduced bitterness and astringency, are provided. In a general embodiment, the methods comprise performing microfiltration on green tea extract to form a microfiltration retentate and a microfiltration permeate; performing at least one of ultrafiltration or reduced temperature fractionation on the microfiltration permeate; and using the ultrafiltration permeate from the ultrafiltration or the supernatant from the reduced temperature fractionation to make a green tea product. The ultrafiltration permeate or the supernatant can be further concentrated, spray or freeze dried to form a powder, used as a concentrate, or diluted to form a ready-to-drink beverage. In an embodiment, the ultrafiltration is performed on the microfiltration permeate to form an ultrafiltration retentate and an ultrafiltration permeate and then the reduced temperature fractionation is performed on the ultrafiltration permeate to form a supernatant and a sediment.

Methods for modulating the bitterness and astringency of green tea, and nutritional products having a green tea with reduced bitterness and astringency, are provided. In a general embodiment, the methods comprise performing microfiltration on green tea extract to form a microfiltration retentate and a microfiltration permeate; performing at least one of ultrafiltration or reduced temperature fractionation on the microfiltration permeate; and using the ultrafiltration permeate from the ultrafiltration or the supernatant from the reduced temperature fractionation to make a green tea product. The ultrafiltration permeate or the supernatant can be further concentrated, spray or freeze dried to form a powder, used as a concentrate, or diluted to form a ready-to-drink beverage. In an embodiment, the ultrafiltration is performed on the microfiltration permeate to form an ultrafiltration retentate and an ultrafiltration permeate and then the reduced temperature fractionation is performed on the ultrafiltration permeate to form a supernatant and a sediment.

An apparatus and method for the removal of unwanted taste components from beverages is described. The apparatus provides a method for contacting a oleophilic-absorbing surface and/or hydrophobic-absorbing surface of polymer media with a beverage before, during or after it is dispensed so that undesirable flavors are selectively removed from the beverage without removing desirable flavors improving the enjoyment of its consumption.