An extractor suitable for using a solvent to separate a compound from a solid or semisolid substance containing the compound. The extractor includes a conveying assembly having an inclined conveyor for receiving the substance from a substance inlet and moving the substance through the solvent, an inclined upper surface associated with the first conveyor and an inclined lower surface associated with the first conveyor. The conveyor is configured to move the substance downward through the solvent along the upper surface toward a lower end of the conveyor and upward through the solvent along the lower surface toward an upper end of the conveyor.

The present invention belongs to the technical field of petrochemical engineering, and relates to a method for continuous post-treatment of benzotriazole (abbreviated as BTA) synthetic fluid. In particular, the present invention relates to a method for synthesizing BTA, including subjecting the BTA synthetic fluid to post-treatment steps of continuous acidification, water washing, extraction, back-extraction, dehydration, and distillation and the like. The method utilizes the difference in solubility of the BTA in water under different pHs to achieve separation by extraction without consuming a large amount of evaporation energy. The present invention is easy to operate, has little environmental pollution, high economic efficiency and low energy consumption, and is easily industrialized.

Disclosed herein is a method of remediating chromated copper arsenate (CCA) treated timber. Particularly, the method comprises contacting the CCA timber with an oxidative solvent and an acidic solvent which provides remediated timber and a variety of extracts containing amongst other things the metals of concern. One or more of the steps is conducted using continuous counter current extraction (CCE).

The present document describes a system and a process for the extraction of several products from apple peel. There are several unit operations involved including an ultrafiltration unit, concentration unit, and a three stage counter current separator centrifuge wherein water is used as the solvent. The final products that are extracted from apple peel include pectin, syrup, fibers, as well as soluble and dried retentate fractions.

The present invention relates to an extraction apparatus for extracting at least one constituent in a substance. The extraction apparatus comprises an extractor, an extraction separator and an extraction condenser. The extractor is used to mix the substance and an extraction fluid, wherein the extraction fluid is a subcritical fluid. The extraction separator is connected to the extractor for receiving and heating the extraction fluid to gasify the extraction fluid and to separate the constituent and the gasified extraction fluid. The extraction condenser is connected to the extraction separator and the extractor for receiving and liquefying the gasified extraction fluid from the extraction separator and sending the liquefied extraction fluid to the extractor.

A method for separating aromatic hydrocarbons by an extractive distillation, comprising introducing a hydrocarbon mixture containing aromatic hydrocarbons into the middle of an extractive distillation column (8); introducing an extraction solvent into the upper part of the extractive distillation column; after an extractive distillation, a raffinate containing benzene is discharged from the top of the column, wherein the benzene content is 3-40% by mass, and sent to the lower part of the extraction column (10); the extraction solvent is introduced to the upper part of the extraction column for a liquid-liquid extraction; a raffinate liquid free of aromatic hydrocarbons is discharged from the top of the extraction column; a rich solvent containing benzene is discharged from the bottom of the column and enters the upper-middle part of the extractive distillation column; the rich solvent obtained at the bottom of the extractive distillation column is sent to the solvent recovery column to separate the aromatic hydrocarbons and the solvent. By combining an extractive distillation with a liquid-liquid extraction ingeniously, the method can achieve the separation of aromatic hydrocarbons with a high purity and a high recovery rate, and a significant decrease of the energy consumption in the extraction and separation process.

The present invention is directed to sunflower protein products, very low in, or free of, beany, green, vegetable or similar flavour notes and useful for the fortification of food and beverage products and prepared without the use of salt in the process. The sunflower protein products of the present invention are obtained by extracting sunflower protein source with water to form an aqueous sunflower solution, at least partially separating the aqueous sunflower protein solution from residual sunflower protein source, adjusting the pH of the aqueous sunflower protein solution to a pH between about 1.5 to about 3.5 to solubilize the bulk of the protein and form an acidified sunflower protein solution then separating the acidified sunflower protein solution from the add insoluble solid material. The acidified sunflower protein solution may be dried following optional concentration and diafiltration to form a sunflower protein product, which may be an isolate. The add insoluble Said material may be washed with acidified water and then dried to form another sunflower protein product. These products may be dried at the acidic pH at which they were prepared or may be adjusted in pH before drying.

A method for continuous exchange of material includes countercurrent contacting of a first fluid phase and a second fluid phase that are not completely miscible. The contacting is carried out in a single centrifugal partition chromatography (CPC) apparatus into which only the first and second fluid phases introduced. The apparatus includes a plurality of cells, each with a stationary phase immobilized and a mobile phase passing through the stationary phase. The following steps are carried out successively: a) the mobile phase is formed by the first fluid phase, and the stationary phase immobilized in the cells is formed by the second fluid phase; b) the mobile phase is formed by the second fluid phase, and the stationary phase immobilized in the cells is formed by the first fluid phase; c) repetition of the succession of steps a) and b) each step being carried out immediately after the preceding step.

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.

The present disclosure relates to methods and an apparatus for extracting terpenes and rosin from resinous wood with an agent that comprises, consists or consists essentially of a terpene to thereby extract the rosin and/or terpene fractions from the resinous wood. The apparatus for extracting rosin and/or terpene fractions comprises a treatment chamber for treating the resinous wood with the agent. The treatment chamber is in communication with a distillation chamber for separating the rosin and terpene fractions extracted from the resinous wood.