A method for extracting herbal medicine includes: step one, spray extraction; step two, pressure filtration and concentration; step three, spray and countercurrent precipitation; and step four, concentrating reduced pressure and drying.

An industrial waste salt resourceful treatment method comprises the following steps: the industrial waste salt is sequentially subject to dissolving, chemical pre-purification, deep purification, organic matter concentration reduction, adsorption and oxidation decolorization and multi-effect evaporative crystallization to respectively obtain sodium sulfate, sodium chloride and sodium nitrate crystals; the crystallization temperature of sodium sulfate is in a range of 75° C. to 85° C.; the crystallization temperature of sodium chloride is in a range of 60 to 70° C.; and the crystallization temperature of sodium nitrate is in a range of 45° C. to 55° C. An industrial waste salt resourceful treatment device is further provided.

The present invention is directed to a method of producing active pharmaceutical ingredients (APIs). The method includes subjecting a reaction mixture with an API precursor to solvent extraction to produce a reactant stream with the API precursor. The method includes concentrating the API precursor in the reactant stream using at least one membrane. The method includes carrying out a reaction in a membrane reactor. The method includes separating the API precursor from the reaction stream using a separator. The method includes crystallizing the API precursor using a crystallizer to produce APIs.

A zero-liquid discharge (ZLD) wastewater treatment apparatus is provided. The ZLD wastewater treatment apparatus includes a concentrator configured to concentrate wastewater to produce a primary concentrate, an evaporation crystallizer configured to concentrate and crystallize the primary concentrate to produce a secondary concentrate, a cooling crystallizer configured to cool the secondary concentrate to generate crystals from the secondary concentrate, a dehydrator configured to separate the product produced by the cooling crystallizer into a solid component and a liquid component, and a cooling system configured to cool the secondary concentrate introduced into the cooling crystallizer, wherein the liquid component produced by the dehydrator heat exchanges with a cooling medium in the cooling system and returns to the evaporation crystallizer.

A method of producing pure cannabidiol (CBD) isolate crystals including the steps of extracting the CBD compound from a cannabis plant; winterizing to remove fats, waxes and chlorophyll from the CBD extract; filtering the CBD extract through a series of filter plates; removing carboxylic acid and CO2 from the CBD extract; removing impurities from the CBD extract by distillation; and crystallizing the purified CBD extract to produce pure CBD isolate crystals and chopping the pure CBD isolate crystals to produce crystals of between 200 and 600 microns in size. A further embodiment includes the steps of grinding the crystals to produce micro-particles of between 1 and 5 microns and releasing the micro-particles into an air environment.

An example method for refining lactose may include washing lactose crystals in a lactose stream in an upstream wash stream including an upstream recirculating wash medium. Washed lactose crystals may be sieved from the upstream recirculating wash medium. The upstream recirculating wash medium may be recirculated back to the upstream wash stream. The washed lactose crystals may be discharged to a downstream wash stream comprising a downstream recirculating wash medium. An example system may include a plurality of refining stages. At least one refining stage may include a washing tank including a lactose crystal inlet and a crystal slurry outlet. The refining stage may include a pump to recirculate a wash stream from the crystal slurry outlet back to the washing tank at a predetermined flow rate. The refining stage includes a screen to separate washed lactose crystals from the wash stream.

A method for producing mixed metal salts containing manganese ions and at least one of cobalt ions and nickel ions, the method including: an Al removal step of subjecting an acidic solution containing at least manganese ions and aluminum ions, and at least one of cobalt ions and nickel ions, to removal of the aluminum ions by extracting the aluminum ions into a solvent, the acidic solution being obtained by subjecting battery powder of lithium ion batteries to a leaching step; and a precipitation step of neutralizing an extracted residual liquid obtained in the Al removal step under conditions where a pH is less than 10.0, to precipitate mixed metal salts comprising a metal salt of manganese and a metal salt of at least one of cobalt and nickel.

The present invention relates to a salt recovery solution and to a process for separating a salt from an aqueous solution. The present disclosure also relates to a salt recovery solution and to its use to concentrate a salt or brine solution by recovering water therefrom. The salt recovery solution comprising at least two or more components independently selected from any combination of integers a), b), c) and d): where a) is a straight, branched or optionally substituted cyclic C.sub.4-C.sub.9 ether containing compound; b) is a straight chain or branched C.sub.3-C.sub.9 alkyl substituted by —OH; c) is a straight chain, branched or cyclic C.sub.4-C.sub.9 ketone or C.sub.4-C.sub.9 diketone; and d) is a straight chain or branched C.sub.3-C.sub.9 ester containing compound.

A method of operating a crystallizing vessel assembly, said vessel assembly having a crystallizing vessel, and a rotor comprising a rotor shaft, said rotor including a plurality of rotor arms, said rotor arms having arms attached to the rotor shaft and scrapers attached at the arms. The crystals are grown on the inside of the vessel and the rotor is rotated to scrape said crystals off. To improve liquid flow inside the crystallizing vessel, a plurality of arms of the rotor arms are hollow arms, each arm of the plurality of arms including an inlet opening that is relatively close to the shaft and an outlet opening that is relatively far from the shaft.

An online measurement device for crystal size and shape in a high-solid-content crystallization process includes a solution amplifier, a measurement device, a peristaltic pump, a crystallization kettle, a dilution device and a solution storage tank. A crystal-containing solution is arranged in the crystallization kettle; an inner wall of the solution amplifier is smooth, one end is an amplification end, and the other end is a contraction end. The contraction end is communicated with one end of the solution storage tank and one end of the crystallization kettle. The amplification end is communicated with the dilution device and the peristaltic pump. The peristaltic pump is communicated with the other end of the crystallization kettle. The solution amplifier, the peristaltic pump and the crystallization kettle form a complete passage through a pipeline. A measurement instrument of the measurement device is arranged at the outer side of the solution amplifier.