126results about "Fractional crystallization" patented technology

Process and apparatus for reducing organic content of brine comprising subjecting a brine solution to at least two purification treatments selected from electrochemical treatment, chlorinolysis, or other chemical oxidation treatment, carbon adsorption, extraction, biological treatment and chrystallizing treatment; wherein the organic content of purified brine is sufficiently low to enable sense of the purified brine in an industrial process.

A process of enhancing peel oil extraction from citrus fruit comprises providing a mixture containing citrus solids and water, subjecting the citrus solids and water mixture to high power ultrasonic energy under conditions sufficient to separate peel oil from the citrus solids, and recovering the peel oil. An apparatus for extracting peel oil from citrus fruit comprises an extractor, a conduit for flowing a citrus mixture containing citrus solids and water, and an ultrasonic generator for subjecting the citrus mixture to high power ultrasonic energy to separate peel oil from the citrus solids. In another embodiment, sonic energy is used to de-emulsify peel oil in a citrus mixture.

In a process for the purification of a crude acrylic acid melt, the crude acrylic acid melt is converted, under the action of low temperatures, into a crude acrylic acid suspension consisting of acrylic acid crystals and residual melt, and the acrylic acid crystals of the crude acrylic acid suspension are freed from remaining residual melt in a wash column, the production of the acrylic acid crystals of the crude acrylic acid suspension being carried out in the presence of water, the wash column being a wash column with forced transport of the acrylic acid crystals and the wash liquid used being the melt of acrylic acid crystals purified in the wash column.

A process for the treatment of a solution containing at least ferric ions, and one or more metal values, said process including the step of maintaining a controlled concentration of ferric ions in solution for a sufficient residence time to control iron hydroxide or oxide crystal growth, and precipitating the iron as a relatively crystalline iron hydroxide or oxide while minimising the loss of the ore or more metal values with the iron hydroxide or oxide.

Processes and apparatus for purifying brine are provided including (1) providing an aqueous brine solution comprising one or more inorganic salts and one or more organic compounds and (2) conducting at least one unit operation for removing organic compounds from the brine solution to obtain a purified brine solution.

The present invention provides a method and apparatus for separating a mixture to be separated (solid-liquid or liquid-liquid mixture) using a deliquescent filter medium. The mixture to be separated is separated into a liquid passing through a filter layer of the filter medium and a captured material captured in the filter layer.

The present invention is a novel method for removing tritium oxide contamination from a solution with water. The method captures the tritium oxide in a much smaller volume suitable for economical disposal. In so doing the original water is decontaminated of the tritium oxide and may be discharged.

The invention provides operating the dry or solvent fractionation of oils and fats in a crystallizer comprising a crystallization vessel (1,2), an agitator, cooling means and a drive, wherein said drive provides said agitator with an oscillating motion, and/or a rotating motion around an axis, with the proviso that each point of said agitator moves at substantially the same linear speed.

The invention also provides a crystallizer comprising a crystallization vessel (1,2) having a polygonal cross-section, an agitator and a drive, wherein said drive provides said agitator with an oscillating motion, and wherein said agitator is not inclined to the moving direction.

This invention relates to a process for purifying benzoic acid continuously to a purity of 99.9% or more by introducing crystals of crude benzoic acid with a bulk density of 0.2 g/cm3 or more and an average particle diameter of 0.3 mm or more into a continuous crystallization apparatus equipped with a stirrer and a heating device from the upper portion of the apparatus, effecting counter-current contact of the falling crystals of crude benzoic acid with the melt generated by heating with the heating device, withdrawing the purified benzoic acid as melt from the lower portion of the apparatus, and withdrawing the mother liquor from the upper portion of the apparatus. The process makes it possible to prepare high-purity benzoic acid continuously in a relatively simple apparatus at high efficiency.

A continuous process for the dry fractionation of edible oils and fats using one or more crystallisers in series, said process comprising the steps of: (a) providing a molten fat; (b) continuously feeding said molten oil or fat to the first of said one or more crystallisers in series in which the fat is gradually cooled by using heat exchangers containing a cooling medium so that a crystal slurry is formed, each of said one or more crystallisers exhibiting a temperature gradient, the temperature at the point where the molten or partially crystallised fat enters one of the crystallisers being higher than that at the point where the slurry leaves that crystalliser; (c) continuously withdrawing said slurry from the last of said one or more crystallisers; (d) separating said crystal slurry by filtration in a filter cake and a filtrate, wherein said process further comprises the step of at least partially melting fat encrustations deposited on said heat exchangers; and an oil fraction produced by therefrom.

The invention relates to an apparatus for the purification of a substance from a solution, a suspension or a mixture of liquids by crystallization, preferably in a continuous manner. The apparatus comprises a first crystallizer (1c) comprising an input (1) for receiving a liquid comprising the substance and an output (4) for discharging a slurry of liquid and crystals. The apparatus comprises also a first separator (1s) connected to the output 4 of the first crystallizer (1c) having a product output (2), and being with a residue output (5) connected to an input of a second crystallizer (2c), and a second separator (2s) being with an input connected to an output (6) of the second crystallizer (2c), a crystal output (7) of the second separator (2s) being connected to an input of the first crystallizer (1c).

The invention relates to the technical field of crystallizers, in particular to a static state fusing crystallizer used for material purifying and separating. The static state fusing crystallizer comprises an installing bottom plate, a base mechanism, a fusing kettle mechanism, a separating mechanism, a crystallizing kettle mechanism, a recycling tank, a flow guiding mechanism and a circulating mechanism; the fusing kettle mechanism is fixedly installed at the top of one side of the base mechanism; the flow guiding mechanism is fixedly connected between the fusing kettle mechanism and the recycling tank as well as between the crystallizing kettle mechanism and the recycling tank; one end of the circulating mechanism is fixedly connected between the recycling tank and the crystallizing kettle mechanism. One end of a circulating pipe is fixedly connected to the recycling tank, accordingly, after crystallization, remaining mother liquor and a fused solution with many impurities enter thecrystallizing kettle mechanism again and are subjected to purification again, then contained pure crystals in the mother liquor can be extracted to the maximum degree, waste is avoided, and meanwhileoperation is convenient.

Methods and apparatus are provided for the removal and purification of the water and salt by-products from spent BHP emitted from a lasing process. The apparatus comprises a liquid processing system that freezes the water and salt by-products into a slurry, and then separates out the water (as ice) and salt components by filtering in a centrifuge. In order to remove as much residual BHP from the wet mixed ice-salt component as possible, a heat source is used to partially melt ice crystals, thereby generating an aqueous rinsing liquid on the surface of the wet mixed ice-salt crystals. The applied centrifugal force causes a continual displacement of the liquid film wetting the surface, so that it becomes progressively diluted. As such, the purification of the mixture of ice and salt crystals is implemented with an aqueous (water) rinse that is unaffected by the sub-freezing temperatures within the centrifuge. The separation and purification may also be performed with a filter in which the conventional built-in water rinse is replaced with a heat source. The filter's driving force, for example gas pressure or vacuum, would be continuously applied during warming.

Methods and apparatus are described for the production of a crystal slurry during the crystallization step of fractionation processes of edible oils and fats and related oil derivatives. The crystallization process for edible oil and fats is carried out in a crystallizer with stationary heat exchange elements, wherein the contents of said crystallizer are made to move along said heat exchange elements in an oscillatory manner without the use of an internal agitator. The crystallizer for edible oil and fats with stationary heat exchange elements is also described.