Extraction devices and related methods are disclosed. Extraction devices disclosed may include a hopper, a piston, and an evaporation chamber. The hopper may be filled with a plant material and a solvent. The piston may be removably housed within the hopper so as to form a hermetic seal with the hopper. Once a solvent and extract mixture is formed within the hopper, a valve in the bottom of the hopper may be opened to allow the solvent and extract mixture to flow into the evaporation chamber via gravity. The remaining plant material may be compressed by the piston to remove any remaining solvent and extract mixture. The solvent may be evaporated in the evaporation chamber leaving a purified plant extract. Various types of plant materials may be used within the hopper. Various types of solvents may be used as well, including heptane and hexane.

This invention was designed to condense, separate and collect volatile compounds from the vapor steam as they exit the dehydrator. Bulk condensate is allowed to accumulate and separate in a separator vessel under vacuum. The undesirable water phase condensate is periodically drained into a water vessel, which is also held under vacuum instead of atmospheric pressure to avoid agitation and mixing of the contents of the separator vessel arising from purging the separator vessel to atmosphere. The separated and desirable oily condensates can then be easily recovered from the separator vessel.

A solar-powered system including a chamber that is bordered by an evaporation layer and a condensation layer; and a photothermal layer located over the evaporation layer so that sun rays incident on the photothermal layer are transformed into heat and the heat is supplied to the evaporation layer for evaporating water. The sun rays incident on the photothermal layer do not pass through the condensation layer prior to arriving at the photothermal layer.

The present invention relates to a method for treating a vent gas steam from heat treatment of plant biomass. The invention also relates to an apparatus for performing the method for treating a vent gas steam from heat treatment of plant biomass.

Systems and methods for solvent-free direct extraction of target compounds from plant matter are disclosed herein. The disclosed systems and methods use low pressure to reduce the evaporation temperature of target compounds without affecting the chemical integrity thereof. Target compounds are extracted from the plant matter in an evacuation chamber, and the extracted target compounds are then collected using a cooling system. Target compounds may be drawn from the evacuation chamber into the cooling system using a carrier gas to facilitate transport of the targeted compounds in the vapor phase. The evaporated target compounds may, for example, be drawn into the cooling system using a recirculation system that includes a blower. The disclosed systems and methods may be used, for example, to extract target compounds from plant matter such as fresh or dried cannabis and hemp, lavender, rosemary, lilac, or other suitable plant matter containing desirable compounds for extraction.

In a helium purification process, a stream containing at least 10% of helium, at least 10% of nitrogen in addition to hydrogen and methane is separated to form a helium-enriched stream containing hydrogen, a first stream enriched in nitrogen and in methane and a second stream enriched in nitrogen and in methane, the helium-enriched stream is treated to produce a helium-rich product and a residual gas containing water, the residual gas is treated by adsorption (TSA) to remove the water and the regeneration gas from the adsorption is sent to a combustion unit (O).

An atmospheric water harvesting material includes a deliquescent salt, a photothermal agent, and a polymeric hydrogel matrix containing the deliquescent salt and photothermal agent.

An atmospheric water harvesting generator includes an adsorbent with a nanopore structure and a moisture-condensing substrate with an amphiphilic structure such that water can be efficiently harvested from the atmosphere even in a dry climate, the generator is easy to operate with little power, and the flow of air can be controlled with a simple control to efficiently and continuously harvest water.

Cooling a first device and second device in a fashion to produce water. The method includes collecting environmental air from an environment. The environmental air is used to cool a first device. Cooling the first device generates first device exhaust air produced from the environmental air. The first device exhaust air is provided to a first device portion of a heat exchanger. At a second device portion of the heat exchanger, thermally coupled to the first device portion of the heat exchanger, second device exhaust air generated by cooling a second device is received. At the heat exchanger, the first device exhaust air is used to cool the second device exhaust air to a dew point, causing condensed water to be created from the second device exhaust air. The condensed water is collected.

The disclosure pertains to a urea production plant and process using a high-pressure CO.sub.2 stripper, downstream medium-pressure treatment unit and a medium-pressure dissociator receiving urea synthesis solution from the reactor, wherein gas from the treatment unit and dissociator are condensed in a first condenser and off-gas from the synthesis section is condensed separately in a second condenser. A revamping method is also described.