Abstract: A filter plug assembly comprises a base having a first base surface with at least one base surface channel, the base surface channel including a flow cavity opening of a flow cavity extending through the base to a second base surface, the base surface channel further including an instrument cavity opening of an instrument cavity extending through the base to the second base surface. The assembly may further include a filter retaining piece, a filter fastener for releasably securing the filter retaining piece to the base while holding the filter between the filter retaining piece and the base forming a filter plug sub-assembly, and an extraction vessel fastener such that an instrument connected to the instrument cavity may sense a condition of a process fluid or mixture within the filter plug sub-assembly without contacting a source material within the extraction vessel.

Abstract: A dual phase re-circulating extraction apparatus comprises at least one extraction vessel, at least one separation chamber, and a circulation conduit configured to direct a process fluid into the extraction vessel, where it may come into contact with a source material to form a mixture, and is then passed to the separation chamber, where the process fluid separates from the extracted material, and the process fluid is recirculated back to the extraction vessel. The apparatus includes a gas pump, at least one heat exchanger, and a liquid pump, each connected to the conduit, to efficiently convert a relatively low pressure gas after separation to a relatively high pressure liquid or supercritical fluid for extraction. The apparatus can be configured to enable a batch mode process allowing continuous flow to the separators while the extractors are cycled online and offline in a sequence to enable servicing and reloading.

Abstract: A dual phase re-circulating extraction apparatus comprises at least one extraction vessel, at least one separation chamber, and a circulation conduit configured to direct a process fluid into the extraction vessel, where it may come into contact with a source material to form a mixture, and is then passed to the separation chamber, where the process fluid separates from the extracted material, and the process fluid is recirculated back to the extraction vessel. The apparatus includes a gas pump, at least one heat exchanger, and a liquid pump, each connected to the conduit, to efficiently convert a relatively low pressure gas after separation to a relatively high pressure liquid or supercritical fluid for extraction. The apparatus can be configured to enable a batch mode process allowing continuous flow to the separators while the extractors are cycled online and offline in a sequence to enable servicing and reloading.