A solid-liquid separation device performs dehydration or deoiling from a treated object using a substance A that is a gas at normal temperature and pressure and is capable of dissolving water and oil when liquefied. The separation device includes a substance B that circulates while generating phase change in a closed system, a compressor that compresses the substance B, a first heat exchanger that condenses substance B and evaporates of the substance A, an expansion valve that decompresses the condensed substance B, a second heat exchanger that evaporates substance B and condenses substance A, and a treatment tank wherein substance A is mixed with the treated object, substance A is evaporated while separated from the liquid in the first heat exchanger, and condensed in the second heat exchanger. The center of gravity of the first heat exchanger is lower than the second heat exchanger in a vertical direction.

An apparatus and a method for plant extraction are disclosed. The apparatus of the present invention comprises an extraction module, a separating module and a reservoir. The method essentially includes plant material preparing, decarboxylating, active components extracting and separating. By using liquid tetrafluoroethane as the solvent in the apparatus of the present invention, the active components of the plant material are efficiently extracted under low pressure extraction and high pressure extraction conditions.

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.

Various aspects of this patent document relate to a method to extract an oil from a plant material using an apparatus by first exposing the plant material to a heated gas stream at a temperature sufficient to volatilize the oil from the plant material, and then rapidly cooling the gas stream to liquefy the oil.

An apparatus and method for extraction of oils from botanical material using high-pressure hydrocarbons such as propane, or butane, or mixtures thereof are described. A high-pressure propane or butane saturated liquid/vapor mixture formed by pressure reduction through a valve placed before an extraction column, thereby serving as an expansion port was employed. The apparatus is capable of both continuous liquid extraction or batch-style liquid operation through the use of a manifold valve, which directs the solvent liquid/vapor in the system to either a supply tank or an extraction column.

A method of making CBD concentrate or CBD Isolate comprises (a) milling a raw material; (b) contacting the milled raw material with an extraction solvent and separating a solid waste material to form a filtered extract; (c) concentrating the filtered extract; (d) washing the concentrated extract to form an organic phase and an aqueous phase; (e) separating the aqueous phase from the organic phase to form a washed extract; (f) removing an organic solvent from the washed extract to form a concentrated washed extract; (g) decarboxylating the concentrated washed extract; (h) vacuum distilling the decarboxylated extract to form a distillate; (i) dewaxing the distillate to form a post-dewax filtrate; (j) applying a vacuum to the post-dewax filtrate to form a post-dewax concentrate; (k) degassing the post-dewax concentrate; and (l) vacuum distilling the degassed concentrate to form a CBD concentrate.

A method of producing an extract of an animal-derived or plant-derived biological material includes: extracting a component in the biological material using liquefied dimethyl ether for the biological material to obtain a liquefied dimethyl ether solution including the component; separating the solution from the biological material; and volatilizing or separating the liquefied dimethyl ether from the solution.

A method of isomerizing Δ9-tetrahydrocannabinol (“Δ9-THC”) to Δ10-tetrahydrocannabinol (“Δ10-THC”). The method includes the steps of: extracting Δ9-THC from cannabis biomass, which optionally contains one or more of the components found in fire retardant such as PHOS-CHEK®; dewaxing of crude extracts by winterization; pH-adjusting extracts by washing the extracts in heptane solution with aqueous solutions of: citric acid, sodium bicarbonate, and brine; isomerizing Δ9-THC to Δ10-THC by exposure to suitable conditions and in the presence of a catalyst based on the components of fire retardant; vacuum distillation of Δ10-THC at a predetermined temperature range and vacuum level; collecting the distillate and redistilling it up to three times to acquire distillate containing less than 60% Δ10-THC; and purification of the MO-THC to a purity of 99% or greater by crystallization from n-pentane solution.

A method and apparatus for extracting active components from a plant material by: introducing the material containing the active components in an extraction chamber: introducing a hydrofluorocarbonated compound in a tank at a pressure between 482.6 kPa and 1,447.9 kPa (70 psi to 210 psi): introducing ethanol in a receptacle; mixing the hydrofluorocarbonated compound with ethanol; allowing the mixture to reach the plant material; allowing the mixture enriched with ethanol and the hydrofluorocarbonated compound to flow out of the extraction chamber and into a tank; allowing the ethanol to evaporate and become separated from the residual mixture slower than the hydrofluorocarbonated compound; optionally, the hydrofluorocarbonated compound is recovered by condensing and returning it to the pressurised tank; optionally, the ethanol is recovered by condensing and returning it to the mixing receptacle.

A process for the recovery of lithium from waste lithium ion batteries or parts thereof is disclosed. The process comprising the steps of A) providing a crude lithium hydroxide as a solid, which contains fluoride; and (B) dissolving the crude lithium hydroxide solid with a lower alcohol such as methanol or ethanol provides good separation of lithium in high purity.