PROCESS AND EQUIPMENT FOR THE EXTRACTION OF SOLID, GRANULAR AND/OR CRUSHED MATERIALS WITH A LIQUID AND FOR PRETREATMENT THEREOF TO FURTHER EXTRACTION

摘要

The invention relates to a process for the extraction of a granular and/or crushed solid with a liquid and for the pretreatment thereof to further extraction, where in the process, the solid is mixed with a liquid resulting in the chemical decomposition thereof and the liquid mixed with the substance to be obtained is pressed out from the solid, which comprises bringing onto the solid, while agitating and moving it forwards, a liquid resulting in a chemical decomposition, with which liquid the solid is intimately contacted in this way; further conveying the wetted solid, while continuously decreasing its volume, under a pressure being higher than atmospheric pressure and increasing this pressure during its passing forwards, thus rupturing the cell walls of the solid or a part thereof, and removing by the overpressure a liquid mixed with the substance to be obtained from the wetted solid; in the case of a further extraction, further conveying, while agitating, the pressed and partially liquid-exempted solid, meanwhile adding a decomposing liquid thereof and intimately contacting it with the decomposing liquid during its conveyance, then charging (feeding) it into the extractor. The invention further relates to an equipment, which is particularly useful for carrying out the process of the invention.