Method and Apparatus for Industrial Production of an Extract by Solid-Liquid Extraction

A method for the industrial production of an extract by solid-liquid extraction by means of an extraction container, wherein

• a secondary solvent located in the extraction container and a primary mixture consisting of a solid primary solvent and a transition component are brought into contact with each other for a predetermined dwell time to obtain the extract,
• the primary mixture is enclosed in a liquid-permeable vessel within the extraction container,
• the primary mixture with a predetermined second mass is introduced into the vessel located in the extraction container,
• the extraction container is filled with a predetermined first mass of the secondary solvent,
• the obtained extract and a complementary portion of raffinate are separated from each other after the predetermined dwell time,
• an extract freed from the raffinate with residual moisture is discharged from the extraction container, and
• the residual moisture consisting of extract is at least partially removed from the raffinate with residual moisture through dehumidification by mechanical pressing in the vessel and is supplied to the obtained extract, the method comprising:
• (i) one of:
• introducing the primary mixture having the predetermined second mass into the vessel located in the extraction container, or
• placing the vessel filled with the primary mixture having the predetermined second mass into the extraction container;
• (ii) enhancing the solid-liquid extraction during a first dwell time by at least one of:
• at least partially flooding the vessel in the form of at least one flow discharged in a planned and targeted manner with the secondary solvent or the obtained extract,
• swirling and keeping in suspension the primary mixture within the vessel by supplying the secondary solvent or the obtained extract via a foot area of the vessel through an upwardly directed additional flow, or
• moving the vessel relative to the extraction container within the obtained extract;
• (iii) circulating the secondary solvent or the obtained extract in the extraction container by a circulation guide incorporating the extraction container from top to bottom relative to the extraction container;
• (iv) supplying extract ((C∞B)**) obtained by dehumidification and freed from raffinate with residual moisture to the extract freed from raffinate with residual moisture that is already separated or to be separated;
• and
• (v) filling the extraction container with a predetermined additional first mass of the secondary solvent after the first dwell time according to step, wherein the solid-liquid extraction is continued with a second dwell time.