A flow limiter system is provided for extracting compounds from raw materials with an extraction column. The flow limiter system may include a flow governor assembly which contains and buffers a flow of pressurized solvent entering the base of the extraction column to prevent the flow of pressurized solvent from drilling into the raw materials packed within the extraction column. The flow governor assembly may further include a first disc with a first set of perforations to direct the surge of solvent through the first disc to transform the turbulent surge of solvent into a column of non-turbulent solvent with a flat surface layer that rises up the extraction column evenly and collectively. Additionally, the flow limiter system may also include a limiter disc including a second set of perforations to allow the extracted effluent to flow through the set of perforations and exit the extraction column.

A process for producing polyamides makes flow guidance within the process more efficient. In some respects, the process is based on the polymerization of lactam to a polyamide-containing polymer melt, the subsequent granulation of the polymer melt to polyamide granules using granulation liquid, and the subsequent extraction of monomeric and oligomeric constituents from the PA granules in an extraction column. In some examples, a temperature of the granulation liquid before being fed into an extraction liquid stream is lower than a temperature of the extraction liquid stream before the granulation liquid is fed into the extraction liquid stream. The invention relates also to a device for carrying out processes such as this one.

A method for isolating a lithium precursor according to an embodiment of the present disclosure includes preparing a preliminary precursor mixture including a preliminary lithium precursor and a preliminary transition metal precursor, mixing the preliminary precursor mixture and a precipitation liquid in a reactor to form a precursor mixture, and injecting a non-reactive gas into the precursor mixture. Accordingly, the lithium precursor can be isolated with high yield and high efficiency.

A flow limiter system is provided for extracting compounds from raw materials with an extraction column. The flow limiter system may include a flow governor assembly which contains and buffers a flow of pressurized solvent entering the base of the extraction column to prevent the flow of pressurized solvent from drilling into the raw materials packed within the extraction column. The flow governor assembly may further include a first disc with a first set of perforations to direct the surge of solvent through the first disc to transform the turbulent surge of solvent into a column of non-turbulent solvent with a flat surface layer that rises up the extraction column evenly and collectively. Additionally, the flow limiter system may also include a limiter disc including a second set of perforations to allow the extracted effluent to flow through the set of perforations and exit the extraction column.

Systems for extracting solute from a source material are shown and described. Each of the systems includes: a solvent source container configured to store a cooled solvent, a canister configured to contain the source material and receive solvent to produce an extract solution, and one or more extract containers in communication configured to receive and distill the extract solution, the solvent source container being configured to receive a post-extraction portion of the solvent. In some examples, the one or more extract containers are first and second extract containers that are each selectively coupleable to the canister and are selectively removable for storage of the extract mixture or the solute. In some other examples, the system further includes a cooling mechanism coupled to the solvent source container for cooling the recycled solvent within the solvent collection container.

Embodiments of an infusion extractor are provided including a plunger to be inserted into an infusing container containing the infusion mixture that can have vertical inner walls oriented parallel to a vertical axis of the container. In some implementations, the plunger includes a first surface with a seal situated at an edge of the surface. The seal is adapted for sealing against the inner walls of the infusing container as the plunger moves within the container. The plunger also includes a second surface extending from the first surface and defining a second chamber. At least a portion of the extract flow openings are situated at a depth either above or below the first surface along the vertical axis.

An infusion extractor is provided including a plunger to be inserted into an infusing container containing the infusion mixture that has vertical inner walls oriented parallel to a vertical axis of the container. The plunger includes a first surface with a seal situated at an edge of the surface. The seal is adapted for sealing against the inner walls of the infusing container as the plunger moves within the container, to define a first chamber containing the mixture of infusible material and extract. The plunger also includes a second surface extending from the first surface and defining a second chamber; the second surface includes extract flow openings which permit flow of extract from the first chamber into the second chamber. At least a portion of the extract flow openings are situated at a depth either above or below the first surface along the vertical axis.

An extractor with a housing, conveyor assembly, and a plurality of recycle stages which are configured to direct a flow of solvent or miscella upwardly through a material bed.

Embodiments of an liquid filtering device are provided including a plunger to be inserted into an container containing a liquid that can have vertical inner walls oriented parallel to a vertical axis of the container. In some implementations, the plunger includes a first surface with a seal situated at an edge of the surface. The seal is adapted for sealing against the inner walls of the infusing container as the plunger moves within the container. The plunger also includes a second surface extending from the first surface and defining a second chamber.

A system is provided that includes a solvent source; a canister adapted to contain plant material and positioned downstream of the solvent source; an extract container positioned for receiving and collecting at least a portion of an extract solution from at least the canister, the extract container further positioned to separate at least a portion of the solvent from at least the portion of the extract solution, thereby providing a recycled solvent; a solvent collection line for directing the recycled solvent; and a coolant line positioned for directing coolant that is thermally coupled to at least a portion of the solvent collection line for cooling the recycled solvent that is flowing through the solvent collection line.