313 results about "Chloride potassium" patented technology

The invention provides a method for promoting generation of tea acid from Nemania sp YAFEF112, and relates to the technical field of microbial culture. According to the method, mycelia of Nemania sp YAFEF112 are inoculated into a culture medium containing pruned walnut branches for culture, the culture medium is an MM culture medium, and the specific formula of the culture medium comprises 1.52 g / L of monopotassium phosphate, 0.52 g / L of magnesium sulfate, 6 g / L of sodium nitrate and 0.52 g / L of potassium chloride. According to the method, the defects in the prior art are overcome, and good conditions are provided for the production of the tea pickled acid by optimizing the formula of the fermentation culture medium, adding pruned walnut branches into the culture medium, improving the fermentation conditions and increasing the content of the tea pickled acid in the Nemania sp YAFEF112 hyphae.

The invention discloses a composite inducer for promoting adhesion and metamorphosis of marine bivalve mollusk larvae and an application method of the composite inducer. The composite inducer for promoting adhesion and metamorphosis of the marine bivalve mollusk larvae comprises glutamine, glutamic acid, potassium chloride, calcium chloride and taurine, and the concentration ratio of the glutamine to the glutamic acid to the potassium chloride to the calcium chloride to the taurine is 1: 1: 2 * 10: 1.7 * 10: 4. According to the application, glutamine, potassium ions, calcium ions, glutamic acid and taurine are matched, the application effect of the glutamine, the potassium ions, the calcium ions, the glutamic acid and the taurine in the aspect of improving the attachment and metamorphosis rate of the shellfish larvae is defined, the technical blank of multi-component cooperative regulation and control of the attachment and metamorphosis of the shellfish at present is filled, a new solution is provided for bivalve shellfish fry production, and the application prospect is wide. The method is of great significance in promoting healthy development of the mariculture industry.

The invention discloses a low-sodium myofibrillar protein flavor prediction method and a low-sodium myofibrillar protein flavor prediction device. The method comprises the following steps: firstly, constructing a protein-flavor interaction system containing myofibrillar protein, potassium chloride, kappa-carrageenan and representative aldehyde flavor compounds; then, by means of spectroscopy, rheometer combination, an electronic tongue and the like, protein conformational change, typical aldehyde molecule binding rate and taste features are represented in a multi-dimensional mode. And establishing a random forest prediction model, taking protein conformation parameters as input, and taking a flavor binding rate and effective taste intensity as output. The model can reveal cross correlation between protein conformations and functions and identify key conformation parameters that affect flavor. And in combination with quantification and prediction capabilities of the model, a conformation-flavor relationship can be systematically analyzed, a basis is provided for optimization of a low-sodium formula, flavor is enhanced while salty taste is increased and bitter taste is inhibited, and healthy and sustainable development of low-sodium meat products is promoted.

The invention relates to the field of potassium chloride purification, and provides an analytically pure potassium chloride purification method, which comprises: S1, dissolving industrial grade potassium chloride, adding a refining agent to remove impurities, and filtering to obtain a supersaturated potassium chloride solution; s2, performing variable-speed cooling crystallization treatment on the supersaturated potassium chloride solution to obtain a potassium chloride crystal mixture; s3, performing crystal layer pretreatment on the potassium chloride crystal mixture to obtain a potassium chloride crystal layer; s4, carrying out gradient spraying washing treatment on the potassium chloride crystal layer to obtain a potassium chloride crystal wet material; s5, drying the potassium chloride crystal wet material to obtain analytically pure potassium chloride; the method is simple in process equipment and mild in operation condition, and analytically pure potassium chloride can be stably prepared under the condition of conventional equipment.

The invention discloses a special slow-release fertilizer for wheat in saline-alkali soil as well as a preparation method and application thereof, and relates to the technical field of slow-release fertilizers. The fertilizer contains various functional substances and a microbial agent, and specifically contains the following components in parts by weight: 5-10 parts of urea, 0.5-3 parts of potassium chloride, 5-10 parts of diammonium phosphate, 2-5 parts of triple superphosphate, 0.5-1 part of magnesium sulfate, 0.5-1 part of zinc sulfate, 0.2-0.5 part of boric acid, 0.2-0.4 part of resveratrol, 0.5-1 part of alginic acid, 0.3-0.5 part of fulvic acid and 1.0 part of a microbial mixed agent, and 0.1 to 0.3 part of a surfactant. According to the fertilizer, all the raw material components are reasonably compounded, the physicochemical properties of saline-alkali soil can be effectively improved while the growth requirement of wheat in the saline-alkali soil is met, and meanwhile the utilization rate of the fertilizer can be increased through the slow release effect, and damage to the environment is reduced.

The invention discloses a method for adjusting the pore opening degree of Shanghai green, and belongs to the technical field of plant detection. Shanghai leaves are placed in 20mL of open liquid containing (1) 0.5% potassium chloride and 100 [mu] M / L calcium chloride or (2) 0.5% potassium chloride and 50 [mu] M / L brassinolide or (3) 0.5% potassium chloride and 10 [mu] M / L cytokinin or (4) 0.5% potassium chloride and 5 [mu] M / L gibberellin or (5) 0.5% potassium chloride and 100 [mu] M / L methyl jasmonate, culture is performed under illumination, and the illumination time is set to be 5h, so that the pore opening degree of Shanghai is remarkably increased. Compared with a control group (containing 0.5% of potassium chloride), the pore openness of the treatment is respectively increased by 33.5%, 43.5%, 43.4%, 27.1% and 70.2%. The method disclosed by the invention lays a technical foundation for rapidly screening out the exogenous environmental stimulation factor (environical stimuli) capable of increasing the opening degree of the pore.

The utility model provides a system for treating wastewater discharged during potassium salt production in the chlor-alkali industry. According to the utility model, wastewater is separated into produced water containing sodium chloride and potassium chloride and concentrated water containing sodium sulfate by the nanofiltration assembly in advance, so that the content of sodium chloride in the wastewater is reduced, the wastewater can be changed into the produced water for producing sodium chloride, and then the produced water is evaporated and crystallized by the sodium chloride evaporation and crystallization assembly to obtain a byproduct sodium chloride; meanwhile, in order to improve the purity of the byproduct sodium chloride, mother liquor is discharged when the byproduct sodium chloride is prepared, and at the moment, the potassium chloride freezing assembly cools the mother liquor and extracts the byproduct potassium chloride, so that the potassium chloride in the wastewater is indirectly recycled, and therefore, the potassium chloride in the wastewater is recycled. The resource waste is effectively reduced; the utility model belongs to the technical field of wastewater treatment systems.

The invention discloses a desert blue-green algae large-scale culture nutrient solution and application thereof. The desert blue-green algae large-scale culture nutrient solution is prepared from urea, monopotassium phosphate, potassium chloride, sodium bicarbonate and medium trace element fertilizer. Wherein the concentrations of the urea, the monopotassium phosphate, the potassium chloride, the sodium bicarbonate and the medium trace element fertilizer are 500-550 mg / L, 20-30 mg / L, 10-15 mg / L, 10-15 mg / L and 10 mg / L respectively. The invention provides a nutrient solution special for large-scale cultivation of desert blue-green algae, and solves the technical problems of high cost, low yield and low blue-green algae purity of large-scale cultivation of desert blue-green algae in the prior art. The nutrient solution composition provided by the invention can balance each nutrient composition, so that the nutrient composition can be more suitable for the nutritional requirements of the growth of the desert blue-green algae.

The application discloses a kind of compositions, reagents and its detection method for high-throughput gene sequencing, belong to gene sequencing technical field, the composition includes Tris-HCl buffer 80-120 parts, potassium chloride 40-60 parts, ammonium sulfate 10-20 parts, magnesium chloride 15-25 parts, dNTPs mixed solution 30-50 parts, heat-stable DNA polymerase mutant 8-15 parts, PCR promoter complex 5-12 parts, modified iridium quinoline ketone complex 1-5 parts, glycerol 150-250 parts, Tween-20 1-3 parts, EDTA disodium salt 0.5-2 parts and nuclease-free ultrapure water, by introducing the modified iridium quinoline ketone complex of innovation, effectively solve the technical problems of low amplification efficiency, poor multiplex PCR reaction uniformity and high non-specific amplification background for high GC content, complex secondary structure genomic template, significantly improve the specificity of amplification, uniformity and the quality and reliability of final sequencing data.

A production process for preparing potassium chloride by using underground native carnallite ore comprises the following steps: carrying out primary crushing on the underground native carnallite ore, combining a material obtained by carrying out secondary crushing on an oversize material with an undersize material, conveying the combined material to a decomposer or a crystallizer, adding a beneficiation reagent into decomposed slurry or underflow slurry of the crystallizer, and carrying out roughing, roughing concentrate K1 and roughing tailings T1 are obtained; roughing tailings T1 are conveyed to a thickener, overflow of the thickener is collected and then returns to a decomposing tank for size mixing or flotation size mixing, and underflow of the thickener is subjected to ore grinding operation; materials discharged by the mill are conveyed to middling flotation operation to obtain middling flotation concentrate K2 and flotation tailings T2, the middling flotation concentrate K2 and decomposed slurry of the decomposing tank are subjected to roughing operation together, and roughing concentrate K1 is obtained; and the roughing concentrate K1 is subjected to secondary concentration to obtain crude potassium slurry K4, the crude potassium slurry K4 is filtered to obtain a crude potassium filter cake K5, and the crude potassium filter cake K5 is washed and filtered to obtain a potassium chloride wet material product. The product is high in recovery rate and proper in particle size.

This invention belongs to the field of plant genetic engineering technology, specifically relating to the application of H3K27me3 in regulating the cotton response to potassium chloride stress. By integrating CUT & Tag chromatin analysis and RNA-seq, this invention demonstrates that potassium chloride stress induces a reduction in H3K27me3 deposition across the entire genome, accompanied by characteristic stress phenotypes in cotton seedlings. Inhibition of H3K27me3 using RDS 3434 significantly improved KCl-induced physiological damage, confirming the functional correlation between this epigenetic marker and stress tolerance. Furthermore, virus-induced gene silencing confirmed that genes associated with H3K27me3 are important components of the cotton ion stress response network. Therefore, this invention elucidates the epigenetic landscape regulating adaptation to potassium chloride stress.

The invention relates to a slow-release phosphorus removal agent as well as a preparation method and application thereof, in particular to a slow-release phosphorus removal agent for phosphorus pollution of a low-temperature water body as well as a preparation method and application thereof. The slow-release phosphorus removal agent comprises the following components in parts by weight: 1500 parts of potato starch, 160 parts of sodium citrate, 100 parts of ammonium sulfate, 20 parts of sodium chloride, 60 parts of potassium chloride, 10 parts of magnesium sulfate, 10 parts of calcium chloride and 1 part of maltose, wherein the weight ratio of the maltose to the pure water is 1: 20000. The preparation method comprises the following steps: 1, preparing the potato starch-based slow-release medicament; 2, forming and purifying starch microspheres; and step 3, preparing a sustained-release medicament finished product. The method has the beneficial effects that low-temperature water body phosphorus removal flora is efficiently activated, and the phosphate removal efficiency is remarkably improved; the slow-release characteristic meets the low-temperature treatment requirement, and long-acting stable phosphorus control is achieved; and the method is environment-friendly, excellent in economical efficiency and suitable for large-scale application.

The invention belongs to the technical field of drilling fluids in petroleum and natural gas development, and particularly relates to a rigid-flexible nanoparticle reinforced foam drilling fluid and a preparation method thereof. The foam drilling fluid comprises composite magnetic nanoparticles, potassium chloride, a surfactant, a nanocellulose material and deionized water, wherein the composite magnetic nanoparticle has a core-shell multi-layer structure which takes a magnetic material as an inner core and sequentially wraps a primary polymer layer, a porous carrier framework layer and a rigid-flexible composite shell layer on the outer layer, and the rigid-flexible composite shell layer consists of a flexible polymer matrix and a rigid polymer matrix. According to the foam drilling fluid, online optimization of viscosity and shear dilution characteristics of a foam drilling fluid system is realized, and dynamic regulation and control of rheological properties of the foam drilling fluid in a complex stratum environment are realized; and moreover, environmental pollution is reduced, and green well drilling and sustainable well drilling can be achieved.

A process for producing lithium hydroxide monohydrate from lithium chloride, the process comprising: (a) adding an aqueous potassium ion and hydroxide ion-containing solution to an aqueous lithium chloride-containing solution, thereby obtaining a mixture comprising lithium hydroxide, potassium chloride and water, (b) selectively precipitating potassium chloride from the mixture, thereby obtaining potassium chloride precipitate and a first mother liquor solution, (c) separating the potassium chloride precipitate from the first mother liquor solution, (d) processing the potassium chloride precipitate to obtain an aqueous potassium hydroxide-containing solution, (e) adding the aqueous potassium hydroxide-containing solution to the separated first mother liquor solution, thereby obtaining a potassium hydroxide-enriched first mother liquor solution, and (f) selectively precipitating lithium hydroxide monohydrate from the potassium hydroxide-enriched first mother liquor solution, thereby obtaining lithium hydroxide monohydrate precipitate and a second mother liquor solution.

The invention relates to a system and a method for extracting liquid calcium chloride, sodium chloride and potassium chloride from fly ash, and belongs to the technical field of resource utilization of household garbage incineration fly ash. The system comprises a washing unit, a filtrate treatment unit and a salt separation and purification unit. The method comprises the following steps: carrying out four-stage countercurrent washing of water washing, acid pickling, water washing and water washing on the fly ash, and carrying out deep dechlorination to produce qualified ash residues; performing impurity removal and nanofiltration on high-salt filtrate discharged by primary water washing, and reusing concentrated liquor for acid washing; carrying out impurity removal and nanofiltration on high-calcium filtrate discharged by secondary pickling, and carrying out high-pressure reverse osmosis concentration on concentrated liquor to obtain a liquid calcium chloride product; and evaporating the nanofiltration produced water to produce sodium chloride and potassium chloride. According to the method, evaporation-free production of the calcium chloride liquid is realized through coupling of circulating pickling and membrane separation concentration technologies, sodium chloride and potassium chloride are synchronously produced, and the method has the advantages of high resource product value, low energy consumption and remarkable ash residue reduction effect.

This invention discloses a culture medium for the mass sporulation of *Substantia macrantha* and its application. The culture medium comprises the following components: lactose 21-23 g / L, yeast extract 14-16 g / L, potassium chloride 0.4-0.6 g / L, magnesium sulfate 0.4-0.6 g / L, potassium dihydrogen phosphate 0.4-0.6 g / L, disodium hydrogen phosphate 0.55-0.75 g / L, sodium molybdate dihydrate 5-7 mg / L, vitamin B6 50-60 mg / L, arginine 20-30 mg / L, and agar 18-22 g / L, diluted to volume with double-distilled water, with a natural pH. Using the culture medium prepared according to this invention to culture *Substantia macrantha* significantly increases the spore yield (164-fold), reaching 2.21 × 10⁻⁶. 8 conidia / cm 2 This provides a reference for the mass production of the fungal spores.

The application discloses a kind of potassium-doped chain-like trimanganese tetroxide positive electrode materials and its preparation method and application, belong to the field of aqueous zinc-ion battery, preparation method includes: configuration isopropanol and deionized water mixed solution with a portion of.In magnetic stirring, manganese acetate, potassium chloride and nitrilotriacetic acid are dissolved into mixed solution, K-Mn-NTA, i.e.K-Mn-NCs precursor is prepared by hydrothermal method;Afterwards, K-Mn3O4-NCs is prepared by annealing method;Finally, polyaniline is in-situ polymerized on K-Mn3O4-NCs to obtain K-Mn3O4-NCs@PANI;The positive electrode material of the application is applied to zinc-ion battery, can improve the cycle performance and rate capability of zinc-ion battery, improve the conductivity of positive electrode material while inhibiting the dissolution of Mn, improve the electrochemical performance of zinc-ion battery.

The invention relates to the technical field of metal stators, and provides a carbonitriding process of a metal stator for a screw drill, which comprises the following steps: preheating the metal stator, and then carrying out salt bath carbonitriding and salt bath oxidation treatment to obtain the metal stator for the screw drill; during salt bath carbonitriding, a carbonitriding agent comprises the following components in parts by weight: 24 parts of a composite carbon material, 10-15 parts of ammonium chloride, 4-8 parts of urea, 3-6 parts of yttrium oxide, 4-8 parts of potassium ferrocyanide and 10-15 parts of potassium chloride; raw materials of the composite carbon material comprise charcoal, carbon nanotubes and light calcium carbonate. According to the technical scheme, the problem that a metal stator is poor in wear resistance in the prior art is solved.

To provide a new bitterness masking agent of potassium chloride, and to provide a production method or the like including the masking agent.SOLUTION: The bitterness masking agent of potassium chloride contains Balsam Peru essential oil as an active ingredient. Here, it is preferable to further contain at least one or more selected from the group consisting of arginine, glutamic acid, lysine and citrulline. It is also preferable to further contain at least one selected from the group consisting of acetoin, diacetyl, and 2, 3-pentanedione.SELECTED DRAWING: None

The application provides a potassium chloride three-stage flash crystallization system and a potassium chloride three-stage flash crystallization method. The three-stage flash crystallization system is composed of a feed pump, a first crystallization unit, a second crystallization unit, a third crystallization unit, a first discharge pump, a second discharge pump, a third discharge pump, a first water pump, a second water pump, a third water pump, a first water tank, a second water tank, a third water tank, a flash circulation pump and a centrifuge. The three-stage flash crystallization system and the potassium chloride three-stage flash crystallization method can effectively reduce energy consumption and equipment cost.

The present disclosure provides a composition comprising a recombinant adeno-associated virus (AAV) vector containing a heterologous nucleic acid, sodium chloride, potassium chloride, magnesium chloride, phosphate buffer, and a non-ionic surfactant at a pH of 7.2 to 7.4. The present disclosure further provides a method of treating a neurological disorder in a subject, the method comprising administering the composition directly to the central nervous system of a subject in need thereof.

The invention relates to the technical field of biological reproduction, and discloses a pig sperm ultra-long-acting dilution powder containing natural antibacterial components and a preparation method of the pig sperm ultra-long-acting dilution powder. The feed additive is prepared from the following raw materials in parts by weight: 30 to 50 parts of glucose, 1 to 2 parts of sodium ethylene diamine tetracetate, 5 to 10 parts of sodium citrate, 1 to 2 parts of sodium bicarbonate, 0.5 to 1 part of potassium chloride, 0.5 to 2 parts of composite natural antibacterial components, 0.2 to 0.8 part of novel antibacterial peptide, 0.3 to 0.8 part of polyvinyl alcohol, 0.05 to 0.2 part of cysteine and 1 to 3 parts of freeze-dried egg yolk powder. The pig sperm long-acting dilution powder prepared by the process has remarkable advantages, the sperm motility rate can be maintained to be 65% or above within 10 days at 17 DEG C, the total number of bacterial colonies is only 3.8 * 10 < 3 > CFU / mL or so within 10 days, the sperm plasma membrane integrity rate and the acrosome integrity rate reach 62% or above and 65% or above respectively after 10 days, the sperm long-acting dilution powder far exceeds traditional dilution powder, and the requirements of long-distance transportation and large-scale breeding are met.

This utility model discloses an airflow dryer for potassium chloride production. The screening device includes a screening component installed inside the dryer body for back-and-forth movement. The screening component contains a vibrating component for removing accumulated potassium chloride. The recovery device includes a connecting component installed inside the dryer body. At the other end of the connecting component is a recovery component for separating the dried potassium chloride from the dryer body. Thus, a motor causes a cam to rotate within a groove, intermittently moving a sleeve plate up and down. Simultaneously, the elasticity of a spring on a round rod causes the screening screen to vibrate intermittently, preventing clogging of the filter holes on the screening screen. Finally, an exhaust fan draws the dried potassium chloride and hot air from the dryer body along the suction hood and connecting pipe to a cyclone separator, which separates the dried potassium chloride from the hot air.

A method for preparing potassium sulfate using underground primary sulfur-rich potassium-containing minerals, comprising: mixing and stirring a potassium chloride raw material and a potassium magnesium vanadium raw material, adding water with TDS / mg / L＜45000 and an SOP mother liquor and stirring, then filtering a resulting slurry to obtain a washing mother liquor LLeo and a filter cake S2; conveying the filter cake S2 to a crystallizer, adding water with TDS / mg / L＜45000 and the SOP mother liquor, performing crystallization in the crystallizer while maintaining the temperature in the crystallizer at 40-65°C, filtering a crystallized slurry to obtain a wet potassium sulfate material and a filtrate, and returning the filtrate for use as SOP mother liquor. The product obtained using the solution of the present application has a relatively high yield and relatively low costs.

The invention provides a miniature dry-method reference electrode and a preparation method and application thereof, and relates to the technical field of reference electrodes, and the preparation method comprises the following steps: sequentially preparing a conductive layer, a silver paste layer and an electrolyte layer on a substrate in a laminated manner; the electrolyte layer is prepared by the following steps: applying electrolyte slurry on a silver slurry layer to form a prefabricated electrolyte layer; the electrolyte slurry comprises potassium chloride and sodium alginate; and applying a calcium ion-containing solution on the prefabricated electrolyte layer to obtain the electrolyte layer. Electrolyte slurry containing potassium chloride and sodium alginate is adopted to prepare a prefabricated electrolyte layer, a stable dry electrolyte layer is formed through cross-linking and curing of a calcium ion solution, sodium alginate forms hydrogel with a three-dimensional cross-linked network structure under the action of calcium ions, the release rate of potassium chloride can be effectively regulated and controlled through the pore structure of the hydrogel, and the stability of the hydrogel is improved. The concentration of Cl <-> can still be kept stable for a long time after the Cl <-> is in contact with a sample, and the reference electrode prepared by adopting the preparation method has good electrochemical stability.

The invention discloses a quick-cooling type low-temperature ice bag without precooling. The quick-cooling type low-temperature ice bag is prepared from, by weight, 10-30 parts of sodium chloride, 10-30 parts of urea, 10-30 parts of potassium chloride, 5-20 parts of sodium sulfate decahydrate, 1-5 parts of borax, 0.5-3 parts of nanometer aluminum oxide, 0.1-1 part of silver chloride and 10-40 parts of ice blocks. The preparation method comprises the following steps: S1, weighing according to the proportion, and sequentially pouring the sodium chloride, the urea, the potassium chloride, the sodium sulfate decahydrate, the borax, the nano aluminum oxide and the silver chloride into a mixing stirrer; s2, stirring parameters configured by the mixing stirrer in the stirring process are as follows: the stirring rotating speed is 50-70r / min, the stirring time is 10-12min, and the environment temperature is controlled to be-5 DEG C to 35 DEG C, so that mixed powder is obtained; s3, the mixed powder is packaged with a bag, and packaged ice bag powder is obtained; and S4, adding the corresponding parts by weight of ice blocks into the packaged ice bag powder, standing for 2 minutes in an environment of 5-25 DEG C, and cooling the mixture to-23 DEG C to-25 DEG C to obtain the quick-cooling type low-temperature ice bag without precooling.

An anti-scaling continuous freezing crystallization device and method. The device comprises an A / B mixed salt dissolution tank (1), an A / B mixed salt solution pretreatment tank (2), an ozone generator (3), a cyclone aerator (4), an MVR evaporator (5), a separation tank (6), a gradient freezing crystallization chamber (7), a mixed salt concentration tank (8), an A crystal drying chamber (9) and a B crystal drying chamber (10). The A / B mixed salt dissolution tank (1) feeds to the A / B mixed salt solution pretreatment tank (2). The ozone generator (3) is connected to the A / B mixed salt solution pretreatment tank (2) via the cyclone aerator (4). The A / B mixed salt solution pretreatment tank (2) is connected to the MVR evaporator (5). The MVR evaporator (5) is connected to the gradient freezing crystallization chamber (7) via the separation tank (6). The gradient freezing crystallization chamber (7) is connected to the mixed salt concentration tank (8), and the gradient freezing crystallization chamber (7) and the MVR evaporator (5) reflux to the A / B mixed salt dissolution tank (1). The mixed salt concentration tank (8) and the gradient freezing crystallization chamber (7) are respectively connected to the A crystal drying chamber (9) and the B crystal drying chamber (10). The method can realize continuous fractional crystallization and is resistant to scaling, and exhibits significant crystallization and purification effects on potassium chloride and sodium chloride mixed salts. The purity of an obtained potassium chloride product is ≥90 (g / 100 g) and the purity of an obtained sodium chloride product is ≥95 (g / 100 g).

This invention provides a system for the treatment and reuse of wastewater from the washing of fly ash from waste incineration. The system comprises a conditioning and preheating device, a first-effect evaporation unit, a second-effect evaporation unit, a third-effect evaporation unit, a parallel first-effect evaporation unit, a calcium chloride precipitation unit, a potassium chloride precipitation unit, a sodium chloride precipitation unit, and a vacuum device. The various devices and units work synergistically, and with the accompanying methods, not only can engineering construction investment be reduced by 30%-40%, but the overall production and operating costs can also be reduced by approximately 30%. Furthermore, it can fully achieve the effective treatment of wastewater and the comprehensive recycling of all resources, resulting in significant social, environmental, and economic benefits.

The invention relates to the technical field of corn soaking water treatment, in particular to a process method for preparing two liquid protein products and recovering potassium chloride by taking corn soaking water as a raw material, which comprises the following steps: adsorbing supernate obtained by standing and settling the corn soaking water by using a resin column, filtering collected effluent, concentrating collected filtrate, and concentrating the concentrated filtrate. Respectively collecting a concentrated solution and a permeate solution; carrying out vacuum concentration on the collected concentrated solution, cooling, carrying out suction filtration, respectively collecting a filter cake and a filtrate, combining the collected filter cake with a leacheate obtained by leaching the filter cake, carrying out concentration treatment, adding ethanol, cooling, and carrying out suction filtration, so as to obtain the collected filtrate, namely a first liquid protein product; and concentrating the collected permeate, adding ethanol, stirring, cooling, carrying out suction filtration, and drying the collected filter cake to obtain the potassium chloride product. According to the process method, the first liquid protein product and the second liquid protein product which are low in magnesium ion content and sulfate ion content can be obtained, and potassium chloride is recycled.

The present application relates to a method for improving the grade of potassium chloride in the process of preparing potassium chloride by using a vacuum crystallizer, comprising a potassium chloride crystallization step (S1), a fine potassium mother liquor is introduced into a DTB vacuum crystallizer for crystallization, part of small particle nuclei enter the circulating channel, are dissolved and then returned to the DTB vacuum crystallizer, and a slurry containing large particle nuclei is discharged to obtain a large particle crystal slurry; a screening step (S2), the large particle crystal slurry is screened by a first screening device to obtain a first screen oversize and a first screen undersize, a second screening device is used to screen the first screen undersize to obtain a second screen oversize and a second screen undersize; a large particle size nucleus treatment step (S3), the first screen oversize is dissolved with fresh water to obtain a targeted mother liquor, and the targeted mother liquor is returned to the circulating channel and then into the DTB vacuum crystallizer for continuous crystallization; and a small particle size nucleus treatment step (S4), the second screen undersize is returned to the inside of the DTB vacuum crystallizer for continuous crystallization. The present application can improve the grade of potassium chloride.