Abstract: A hop resin-based substance has the soft resin at least substantially removed such that the hard resin is present in an enriched state, the hard resin is enriched in terms of the water-insoluble constituents and xanthohumol has been, at least substantially, removed. The substance allows both very balanced bitterness to be adjusted and it does not constitute any optical impairment of beer due to insoluble matter caused by xanthohumol.

Abstract: A pressure vessel arrangement comprises an external pressure vessel and at least one insert basket in the pressure vessel for receiving a substance to be treated which is exposable to a pressure fluid which is feedable to the pressure vessel and the insert basket. There is provided a control device for the internal pressure prevailing in the insert basket, in particular in the form of a switchable pressure compensation line connecting the interior of the insert basket directly to the surroundings, i.e. not via the pressure vessel.

Abstract: The invention relates to a method for decaffeinating tea (Camellia sinensis). The method involves of using, as an extraction agent, a carbon dioxide which is compressed of a pressure greater than 50 and up to 100 MPa.

Abstract: A pressure vessel arrangement comprises an external pressure vessel and at least one insert basket in the pressure vessel for receiving a substance to be treated which is exposable to a pressure fluid which is feedable to the pressure vessel and the insert basket. There is provided a control device for the internal pressure prevailing in the insert basket, in particular in the form of a switchable pressure compensation line connecting the interior of the insert basket directly to the surroundings, i.e. not via the pressure vessel.

Abstract: In a process for preparing a xanthohumol-enriched hop extract, a concentrate having contents of up to 90% xanthohumol is obtained from a xanthohumol-containing hop raw material by dissolving the xanthohumol in lye and subsequent precipitation with acid.

Abstract: The invention relates to a method for decaffeinating tea (Camellia sinensis). The method consists of using, as an extraction agent, a carbon dioxide which is compressed of a pressure greater than 50 and up to 100 MPa.

Abstract: In a method of producing a xanthohumol-concentrated hop extract, the xanthohumol-containing hop extract is extracted from a xanthohumol-containing hop raw material by highly compressed CO2 as a solvent at pressures above 500 bar and temperatures above 60° C.

Abstract: Moistened black tea is decaffeinated using carbon dioxide as a solvent. The mixture consisting of caffeine, water, aroma constituents and gaseous carbon dioxide obtained in the course of the purification of the carbon dioxide (prior to recirculation of the latter) is removed from the separation tank and separated by raising the temperature at atmospheric pressure into an aqueous caffeine solution and a gaseous aroma fraction. The emanating carbon dioxide transports the aroma components, after a dew point depression by lowering the temperature, to decaffeinated, dried tea, to which the aroma constituents are impregnated.

Abstract: This invention relates to a process for extracting nonpolar constituents from natural substances such as hops with simultaneous separation of residues of nonpolar plant protectives (fungicides/insecticides). In a first step, the plant protective as well as other ingredients that are soluble under the chosen conditions is extracted with compressed gases, and in a subsequent stage, the dissolved mixture is passed through an adsorbent and the plant protective is selectively removed from the mixture.

Abstract: The invention relates to a process for extracting nonpolar constituents from hops with simultaneous separation of residues of nonpolar plant protectives. In a first step the plant protective as well as other ingredients that are soluble under the chosen conditions are extracted with compressed gases, and in a subsequent stage the dissolved mixture is passed through an adsorbent and the plant protective is selectively removed from the mixture.