Abstract: This invention relates to an improved process for the separation and isolation of coffee aroma constituents from roasted coffee, combining the aroma constituents with an edible substance and subsequently incorporating the aromatized substance in a food product.The process involves improving the condensation of vapors generated from the distillation of coffee oil by condensing the distilled aroma constituents onto a sleeve cooled by and snugly surrounding a container filled with coolant. The sleeve is removed and the aroma constituents condensed thereon are then preferably combined with an edible substance by manipulating the condensed constituents quickly and efficiently thus minimizing aroma loss and degradation caused by undesirable prolonged contact with air.

Abstract: Coffee aroma gas is admixed with an absorbent comprising aqueous liquid and liquid edible oil under pressure to produce a foam. This foam may then be contacted with soluble coffee solids to effect their aromatization.

Abstract: Hydrophilic and lipophilic flavor and odor producing components of natural products are obtained by extraction with defined dimethyl either-water mixtures.

Abstract: A process for preparing a tea extract is disclosed in which a heated aqueous tea slurry is confined in a first zone separated from a second zone by a liquid-pervious barrier, a body of extraction liquid is maintained in said second zone to permit diffusion of tea solubles from the tea slurry into the extraction liquid, the volume of the slurry being 0.5 to 2.5 times the volume of the body of extraction liquid. After a suitable contact time, the extraction liquid and slurry are removed from the zones and the tea solubles diffused in the extraction liquid and present in the slurry ultimately are combined, intervening processing including, for example, stripping and removing of aromatic volatiles before a final extract product is provided.

Abstract: Soluble coffee of improved stability during storage is prepared by removing a portion of the aromatics from an aqueous coffee extract, drying the remaining extract, fixing the removed aromatics by mixing them in solution with a fixative and drying the resultant solution, and adding at least a portion of the fixed aromatics to the dried remaining extract. The soluble coffee powder so prepared is characterized by its lack of off-flavors normally developed during storage.

Abstract: A process is disclosed wherein the decaffeination of aqueous extracts of vegetable material with non-ionic, hydrophobic resin may be performed in a continuous manner. In accordance therewith, extract is contacted with resin to effect decaffeination, exhausted resin containing adherent caffeine and non-caffeine water solubles is bleached with water to remove the caffeine, the caffeine-free resin is then washed with a solution comprising water and an organic solvent to elute non-caffeine water solubles and then the resin is rinsed with water to permit its reuse in the further decaffeination of vegetable material extracts.

Abstract: Grinder gas aroma evolved from the comminution or fracturing of freshly roasted coffee beans is stabilized by condensing the gas and adding an oxygen scavenger to the condensate. This condensate is then briefly contacted and extracted with a fluorinated-chlorinated hydrocarbon to remove harsh aroma compounds and then with a mixture of non-polar and polar solvents in order to extract desirable aromatics. This extract is stable at freezer temperatures and can be used to aromatize coffee or coffee-like products.

Abstract: An improvement to conventional processes for countercurrent extraction of roast ground coffee is disclosed. Therein, fresh roast ground coffee is contacted with previously produced aqueous coffee brew, and then the resultant admixture is added to the extraction zone.

Abstract: Aqueous liquids resulting from the condensation of vapours emitted by aqueous vegetable extracts are purified by treatment with an ion exchange resin. The purified condensates may be used for the extraction of the vegetable material.

Abstract: A novel process for extracting roasted coffee using split-extraction percolation techniques is disclosed comprising obtaining an autoclave coffee extract by passing aqueous extraction liquid through the autoclave section of the percolator set, splitting the autoclave extract into a product portion and a feed portion, obtaining an atmospheric coffee extract product from the atmospheric section of the percolator set by passing the feed portion of the autoclave coffee extract through the atmospheric section, and further processing the atmospheric coffee extract product and the product portion of the autoclave extract to obtain a dry instant coffee product.

Abstract: In the process for the concentration of volatiles-bearing products by a low-temperature, short-time, multi-effect evaporation method, a forward feed of the product and vapor occurs so that at least from a given stage of evaporation, each subsequent stage of evaporation is carried out at a lower temperature. The volatile constituents, removed with the vapor from one or more effects and subsequently condensed and recovered, are combined with the partially concentrated product before a final stage or stages of evaporation at a temperature lower than that at which they were originally distilled off. Thus a more highly volatile fraction is again removed with the vapor in the said final stage or stages of evaporation.