428results about "Purification by physical means" patented technology

A process for obtaining one or more than one salt of an organic acid(s), or organic acid(s), from an aqueous sugar stream comprising one or more than one mineral acid and the organic acid(s) is provided. The process comprises introducing the aqueous sugar stream to a separation system comprising one or more beds of anion exchange resin and obtaining a stream therefrom comprising the sugar. The one or more beds of anion exchange resin are then regenerated in one or more stages to produce at least one product stream comprising the organic acid, a salt of the organic acid, or a combination thereof, and a separate outlet stream comprising the mineral acid, a salt of the mineral acid, or a combination thereof. The product stream is then recovered. The separation may be conducted with two separation units, or using a single anion exchange unit.

An acid recovery system used in a hydrolysis operation includes a chromatographic unit to provide initial separation of sugar and acid. The sugar product provided by the chromatographic unit is processed to produce higher value products, such as ethanol. The remaining acid is contaminated by sugar. A nanofiltration unit containing a nanofilter membrane processes the sugar contaminated acid. The acid is allowed to permeate across the nanofilter membrane while sugar is rejected. The permeate is provided to a conventional acid recovery system and recycled for use in the hydrolysis process.

The invention discloses an industrialized production method of primitive brown sugar. The method comprises the steps of with cane sugar factory mixed juice as a raw material, adding lime milk to regulate the pH value to 5.8-6.6; sieving and filtering; heating, floating and removing floating slag; removing impurities through microfiltration; evaporating and concentrating to obtain syrup with the concentration of 60-65-degree Bx; boiling sugar at the temperature of 125-130 DEG C at normal pressure to obtain syrup with the concentration of 95-98-degree Bx; sanding and forming to realize industrialized production of the primitive brown sugar. When used for producing brown sugar, the industrialized production method disclosed by the invention is safe and reliable in production process, high in mechanization degree, capable of realizing large-scale production of the primitive brown sugar and stable in product quality.

The invention discloses a technology for refining saccharose. The technology comprises specific steps of juicing, pretreating, micro-filtering by a membrane, pre-concentrating, decoloring through ion exchange, desalting, evaporating and concentrating through MVR (mechanical vapor recompression), crystallizing, separating through centrifuging, and drying so as to obtain the saccharose crystal. The technology has the advantages that ceramic microfiltration substitutes for sedimentation by sheet frames and lime, so that the step of ultrafiltration is saved; due to concentration by the membrane, the evaporation capacity of evaporation and concentration equipment is reduced, the energy consumption is lowered, and part of inorganic salt is removed; the technology of decoloring and removing impurities through ion exchange substitutes for the technology of stoving, so that the problem of residual sulphur in the saccharose is solved, and the quality of the product is improved; the manner of ion exchange can effectively remove the salt in cane juice; energy consumption is effectively lowered due to the MVR; by adopting the membrane concentration and separation and ion exchange equipment, the floor space of the equipment is reduced, and investment of capital construction is lowered.

A process for the preparation of white and brown sugar from raw diffuser beet juice. The juice is purified by membrane filtration at 70-95° C. on a filter having a molecular weight cut-off between 2,000 and 500,000 Dalton and evaporated to a dry matter content of between 60 and 80% by weight under vacuum to a thick juice. A conventional multi-step evaporative crystallisation of the thick juice gives crops of white and brown sugar crystals. The brown sugar obtained have valuable organoleptic properties.

An originally ecological black sugar processing method comprises the following steps: after sugarcane is squeezed for extracting juice, carrying out rough filtration so as to obtain sugarcane juice; heating the sugarcane juice to 90-100 DEG C and keeping heat for 1-3 min so as to obtain heated sugarcane juice; conveying the heated sugarcane juice to a multistage ceramic membrane ultrafiltration device for ultrafiltration clarification so as to obtain clarified sugarcane juice; concentrating the clarified sugarcane juice into syrup; concentrating the syrup through a jacketed iron pot so as to obtain decocted massecuite; graining, cooling and forming so as to obtain originally ecological black sugar. The originally ecological black sugar prepared through the method provided by the invention is small in grain, brown-dark brown and natural in color, contains fewer impurities, has a natural caramel charcoal burning fragrance, is rich in flavor, and fine and smooth in mouthfeel, retains the nutritional ingredients of sugarcane to the greatest extent, and has a high nutritional value; the turbidity is less than 0.5 NTU after the black sugar is dissolved to 11.5 degrees Bx, so that the problem that precipitates occur after the black sugar is dissolved for a long time is solved.

A method of treating whey for demineralization purposes, the method comprising a stage of separating out salts by transfer through electrodialysis or nanofiltration membranes, wherein, upstream from this separation stage, the method comprises in succession at least one step of exchanging divalent cations for protons and at least one step of exchanging divalent anions for chloride ions.

A process to clarify raw sugar cane juice, which comprises adding a source of lime, adding an anionic inorganic colloid or polyacyrlamide, and carbonating.

PCT No. PCT/FI95/00329 Sec. 371 Date Mar. 10, 1997 Sec. 102(e) Date Mar. 10, 1997 PCT Filed Jun. 7, 1995 PCT Pub. No. WO96/00776 PCT Pub. Date Jan. 11, 1996The invention relates to a process for fractioning vinasse, in which process the pH value of the vinasse is lowered by adding acid, and the formed precipitate is separated in order to obtain an inorganic fraction, whereupon an organic fraction remains. The invention also relates to the products obtained. The inorganic fraction mainly contains potassium salt, and it is useful for example as a fertilizer. The organic fraction mainly contains organic acids, and it is useful for example as an additive in animal feed and in producing silage.

The invention discloses a process for preparing sugar from cane. The process comprises the following steps: pressing, namely horizontally pressing at first and then longitudinally pressing to obtain cane juice; filtering, namely putting the cane juice into a filter to obtain pure cane juice, and separating out cane residues; clarifying and decolorizing, namely heating the pure cane juice, adding citric acid and calcium hydroxide for mixing, adding lime milk for neutralizing, carrying out secondary heating, and adding polyacrylamide for settling separation to obtain clear juice and mud juice; filtering the mud juice to obtain filtered clear juice, combining the clear juice, and adding active carbon into the clear juice for deodorizing; performing evaporation concentration, sugar boiling and crystallization, honey separation and drying to obtain the finished sugar. The process has good filtering, clarifying and deodorizing effects, and is time-saving, labor-saving and simple to operate.

The invention relates to an improved nanofiltration process for separating and recovering components, such as sugars and sugar alcohols from multicomponent mixtures. The process of the invention is characterized by collecting the nanofiltration retentate/permeate in several fractions with different purity, optional recycling of at least one of the collected nanofiltration retentate/permeate fractions to the nanofiltration and recovering the desired component from the nanofiltration permeate/retentate fractions by different methods. In one embodiment of the invention, the process comprises a combination of nanofiltration and chromatography.

The present invention provides a method wherein flavored sugarcane juice containing 18-20% soluble solids and can be preserved after suitable dilution in aseptic unit packs.

The present invention relates to a sugar making process for refining cane mixed juice by use of a membrane separation technology. The process comprises: heating cane mixed juice; adding an alkaline substance into the heated cane mixed juice to regulate the pH value;separating suspended impurities such as bagasse and the like from the cane mixed juice; collecting a separated liquid phase; removing suspended impurities with small particle sizes, macromolecules, colloids and the like through filtration of a microfiltration membrane; putting the collected filtrate into an ultrafiltration membrane with the molecular weight cutoff greater than that of sucrose; removing pigments and non-sugar substances with molecular weight greater than that of sucrose; using a nanofiltration membrane with the molecular weight cutoff less than that of sucrose molecules to concentrate a decolorized clear liquid; and removing inorganic salts with molecular weight less than that of the sucrose, monosaccharide and the like by virtue of the nanofiltration membrane. Compared with the traditional process, the process provided by the present invention is capable of greatly reducing the chroma and turbidity of the sugar juice, greatly reducing the content of nonsugar macromolecular substance in the sugar juice, and increasing the purity and yield of sucrose, and is free of clarifying agents such as lime and the like in the main process.

The invention provides a new sugaring and clarifying process of low-sulfur low-phosphorus sugarcane. The process comprises the following steps of: respectively adding an inorganic salt decoloring agent, polyquaternium and a zinc dihydrogen phosphate coagulant into the mixed sugarcane juice, feeding the mixed juice into a sedimentation tank or a floatation tank to separate out clear juice and mud juice after performing primary heating, the neutralization by adding lime milk and secondary heating; and obtaining a finished product of sugar after the clear juice is evaporated, concentrated, sugar boiled, crystallized and purged. Compared with the existing phosphate-sulfite clarification method, the new sugaring and clarifying process of low-sulfur low-phosphorus sugarcane disclosed by the invention has the advantages of short process flow, low tone and good quality of the clear juice and good thermal stability, and is capable of saving the resources of lime, sulphur and phosphoric acid, shortening the process flow, improving the product quality and realizing the cleaned production by removing the sulphitation process and device.

The invention relates to a nanofiltration process for enriching and concentrating a neutral organic compound into the permeated liquid with negative retention.

The invention discloses a membrane technology-based refined sugar clear-syrup impurity removal and decoloring technology. The technology comprises the following steps of carrying out press filtration on syrup to obtain clear syrup, before evaporation, feeding the clear syrup to a microfiltration device, carrying out microfiltration on the clear syrup by a microfiltration device to obtain a microfiltred concentrate liquid and a microfiltred penetrating liquid, removing the microfiltred concentrate liquid, collecting the microfiltred penetrating liquid, feeding the microfiltred penetrating liquid into a ultrafiltration device, carrying out further condensation treatment on the primary ultrafiltration concentrate liquid, carrying out sterilization to obtain a sugar liquid, and feeding the last ultrafiltration concentrate liquid into follow-up processes of sugar refining. The technology does not produce a waste liquid, is free of a chemical reagent, has no damage to the human body, improves syrup purity, reduces syrup turbidity and is conducive to crystallization.

The invention provides a production process and a production device of golden sugar. The production process comprises the following steps: pressing sugarcane or beets to obtain cane sugar juice; pre-filtering the cane sugar juice through a coarse filter and feeding the pre-filtered crane sugar juice into a microfiltration membrane for filtering to obtain clear cane sugar juice; pre-concentrating the clear cane sugar juice to obtain a pre-concentrated solution; feeding the pre-concentrated solution into ion exchange resin for desalting to obtain a permeation solution; feeding the permeation solution into an evaporator for concentrating to obtain cane sugar concentrated liquid; heating the cane sugar concentrated liquid to be oversaturated, adding crystal seeds, naturally cooling and crystallizing, and centrifuging the obtained crystals to obtain golden sugar crystals; drying the golden sugar crystals to obtain a finished product of the golden sugar. The production device comprises the coarse filter, a microfiltration membrane filter, a nanofiltration membrane filter, an anion exchange resin bed, a cation exchange resin bed and the evaporator which are connected in sequence. The production method provided by the invention is capable of continuously producing high-quality golden sugar, the chromatic value of the obtained product is 800-3,000, the desalting rate is high, and the yield is high.

This invention discloses a new cleaning process of producting high quality sugar, and solves the problems of the long line of production, high energy consumption and high processing cost in the well-known two-step method which is used in it.The well-known process comprises the following steps: sugar-cane squeeze or beet lixiviation-elementary filtering-washing the filtered liquid-cooking sugar-separating honey-finished sugar. The cleaning process adds membrane filter, which comprises a membrane assembly, a container, a pump, a device for adding enzymes, a valve and a pipe. Filtering the washing liquid by membrane filter, and then evaporating pure washing liquid, partial washing liquid which don't pass the membrane will return to the container, and the entrapped concentrated liquid which contains many impurities will return to the elementary filter. The membrane in the membrane assembly is ceramic membrane, the aperture of it is 1 mum-0.02 mum. The liquid from the second and the third step is added enzymes by the device befor the membrane filter. The enzymes are amylase. The proportion between amylase to liquid as 0.05-20ppm. The temperature in the membrane filter is 25-100 degrees. In this way, the turbidity index is reduced largely, and the quality of liquid is increased substantially, so much more high quality sugar is produced. And it can improve membrane flux remarkably and availably, and prolong the cleaning frequency for membrane. It fits specially sugar production process for sugar-cane and beet.