838 results about "Chloride potassium" patented technology

The invention discloses a polypeptide-ammonium polyphosphate trace element liquid chelated fertilizer and a preparation method of the liquid chelated fertilizer. The polypeptide-ammonium polyphosphate trace element liquid chelated fertilizer comprises the components by weight percent: 5-25% of urea, 5-15% of ammonium polyphosphate, 5-25% of potassium nitrate, 0.2-3% of potassium silicate, 0.8-5% of potassium chloride, 0.008-0.1% of polyaspartic acid, 0.8-5% of ammonium sulfate, 0.8-5% of ethylene diamine tetraacetic acid (EDTA) calcium, 0.2-3% of EDTA magnesium, 0.02-1.5% of EDTA boron, 0.005-0.1% of EDTA zinc, 0.005-0.1% of EDTA iron, 0.005-0.05% of EDTA copper, 0.005-0.05% of EDTA manganese, 0.001-0.01% of nickel sulfate, 0.001-0.01% of ammonium molybdate, 0.0008-0.01% of cobaltous sulfate, 0.008-0.1% of polyacrylamide and the balance of water. The polypeptide-ammonium polyphosphate trace element liquid chelated fertilizer disclosed by the invention is simple in technology, scientific in proportion, balanced in fertilization, low in cost and good in effect.

The invention discloses a method for producing potassium chloride by using blast furnace dust of iron and steel enterprises. The method comprises the following steps: mixing the blast furnace dust with running water according to a certain ratio in a pre-leaching process; at the end of the mixing, stirring and leaching the mixed solution in a leaching process; filtering the mixed solution in a primary filtering procedure; removing impurities out of primary filtrate in a precipitating and impurity removing procedure; leaching the primary filter residue for the second time in a secondary leaching procedure; adding a precipitator to the primary filtrate in the precipitating procedure for precipitate and removing impurities; standing still for layering or filtering after completely precipitating; carry out multi-effect crystallization on clear liquid in an evaporation crystallization process to produce potassium chloride and sodium chloride products; filtering the mixed solution to secondary filtering equipment after the secondary leaching procedure reaches the filter condition; and recycling secondary filter residue for making iron, and returning the secondary filtrate to the pre-leaching process to be used again. By adopting the method, the high potassium feature in the blast furnace dust is fully utilized, waste materials are changed into valuable resources, the damage of emission of waste to the environment is reduced, and a high-quality potassium chloride product is also produced.

The invention relates to a health-care seasoning, particularly a prebiotic low-sodium salt and a prebiotic low-sodium salt composite seasoning, and a preparation method thereof. The prebiotic low-sodium salt comprises 50-70% of sodium chloride, 20-45% of potassium chloride, 0.5-15% of prebiotic and 1-5% of ultrafine food powder and other auxiliary materials. Unless otherwise specified, the percents in the invention are mass percents. The prebiotic low-sodium salt seasoning comprises 10-49% of sodium chloride, 10-37% of potassium chloride, 0.5-15% of prebiotic and 5-30% of ultrafine food powder and other auxiliary materials. The prebiotic low-sodium salt and prebiotic low-sodium salt seasoning overcome the defects of high sodium chloride content, unbalanced sodium and potassium ions and high tendency to causing hypertension and kidney diseases of the human body; the water-soluble dietary fiber-oligosaccharide prebiotic, which is beneficial to the human health, is added to well promote growth and reproduction of the probiotic in the intestinal tract, thereby preventing constipation and subhealth diseases caused by accumulation of toxins in the intestinal tract.

The invention discloses a low-mercury catalyst used for synthesizing vinyl chloride. The low-mercury catalyst takes mercuric chloride as a main active component, one or more of precious metals such as Au, Pd, Pt, Ru, Rh, Os and Ir salts or complexes thereof as active regulators, and one or more of potassium chloride, ferric chloride, zinc chloride and copper chloride as cocatalysts. By adding trace amount of precious metal salt into the mercuric chloride, the low-mercury catalyst forms a stable composite metal compound, plays a role in fixing and activating mercuric chloride, and still maintains very high catalytic activity and stability when the load capacity of the mercuric chloride is reduced to 0.1-2%.

The invention discloses a novel low-sodium salt containing sodium gluconate and a preparation method thereof. The novel low-sodium salt is specifically prepared from the following ingredients in percentage by weight: 15-25% of sodium gluconate, 40-70% of sodium chloride, 15-25% of potassium chloride and 0.5-2% of maltodextrin. The preparation method comprises the steps of mixing sodium chloride, potassium chloride and sodium gluconate according to the ratio, dissolving a mixture into deionized water, heating and stirring until the mixture is completely dissolved, adding 1.5% of maltodextrin into a solution, stirring for certain time, and then, immediately carrying out spray drying. The finally prepared low-sodium salt product is powdery, and the moisture granularity is within a specific range. The sodium content of the product is at least 25% lower than that of the traditional edible salt; and compared with the ordinary low-sodium salt, due to the innovation of the preparation manners for the product, the product has the advantages that the homogeneity is improved, and the taste is pure and is not bitter on the premise that the salinity is guaranteed.

The invention relates to a color function seasoning low-sodium liquid salt formula and a preparing method of color function seasoning low-sodium liquid salt. Low-sodium liquid salt mother liquor is used as main raw materials of the low-sodium liquid salt. The low-sodium liquid salt mother liquor comprises (according to the mass percent in the mother liquor salt content total quantity) 60%-80% of sodium chloride, 15%-30% of potassium chloride and 5%-15% of magnesium chloride. The low-sodium liquid salt further comprises a plant source function component with the adding quantity (according to the mass added into 100 mL of low-sodium liquid salt mother liquor) is 0.5%-10%. Optimization technologies such as mixing, homogenization, sterilization and filling are carried out, and color function seasoning low-sodium liquid salt products with function component activity being maintained to the maximum degree are prepared. A controllable-quantity liquid packaging container is used, the salt can be easily and evenly blended into food, the problem that solid salt is dissolved slowly, so that excessive adding or uneven dispersing may happen is solved, and accordingly eating is convenient and flexible. Compared with traditional solid salt production, during a production process of the liquid salt, a large amount of equipment needed for salt drying can be reduced, energy loss is lowered, and waste water discharging is lowered.

The invention relates to a nuisanceless powder injection refining flux belonging to a flux for casting. Aiming at the problem that a hexachloroethane powder injection refining flux inevitably generates toxic chlorine gas and fluorine gas which are harmful to the health of an operator, etch equipment and tools and cause serious pollution to the environment to generate public hazards. The nuisanceless powder injection refining flux is characterized by comprising the following components in percent by weight: 15-25 percent of Na2SiF6, 5-15 percent of Na2SO4, 5-15 percent of Na2NO3, 5-15 percent of CaF2, 15-25 percent of KCl and the balance of NaCl added to 100 percent. The NaCl and the KCl are combined to achieve favorable spread performance, coverage and separability; the Na2SiF6 produces non-toxic and volatile SiF4 and AlF3 and SiO2 with good slagging performance; a large quantity of hydrogen and other impurities can be taken out in the floating process of a fusant; the CaF2 promotes slag bodies to flow, and the Na2NO3 enables the fusant to raise the temperature partially, and a small quantity of molten aluminum or aluminum alloy doped in slag is dropped back to the fusant. On trial, the nuisanceless powder injection refining flux shows a favorable refining effect and has the beneficial effect of no toxicity or public hazards.

The invention relates to electrolytic plating assistant for hot dip galvanizing of a steel wire. Electrolytic plating assistant comprises the following components: 30-220 g/L of zinc chloride, 0-150 g/L of potassium chloride, 0-150 g/L of sodium chloride, 2-90 g/L of ammonium chloride, 0-100 g/L of boric acid, 0-70 g/L of acetic acid, 1-25 g/L of sodium fluoride, 2-50 g/L of cerium chloride, 0-50 g/L of potassium fluozirconate, 0-50 g/L of methanol, 0.5-20 g/L of hydrogen peroxide and the balance of water. The electrolytic plating assisting method comprises the following steps: washing with alkali, removing oil, washing with water, washing with acid to remove rust, washing with water, activating with weak acid, electrolyzing to assist plating, drying, and purifying the electrolytic plating assistant. The method can reduce the generation of AlCl3, prevent skip plating and reduce the generation of smoke dust. The electrolytic plating assistant has the characteristic of relatively high melting point, and thus, can increase the drying temperature and shorten the drying time. The dried plating assistant has the characteristics of low brittleness, high compatibility with electrogalvanizing, and low tendency to shedding.

The invention provides a method for comprehensively utilizing potassium, boron and lithium in carbonate type salt lake brine. The brine type is converted from the carbonate type into the chloride type through introducing the acidification technology, so that the brine composition is simplified, and further the technical problem of combined extraction of potassium, boron and lithium from the carbonate type salt lake brine is solved. According to the method, the acidification technology is adopted to regulate the pH value of the brine, and the solvent extraction method is adopted to extract boric acid from the acidified brine; raffinate enters a sodium salt pond, then is subjected to solarization and evaporation to separate out sodium salt, and gets into a potassium salt pond to separate out potassium mixed salt; the potassium mixed salt is purified to prepare potassium chloride by adopting the flotation method; the precipitation method is adopted to extract lithium carbonate from the potassium separated mother liquor with enrichment of lithium; old brine subjected to lithium extraction is returned to the acidification pond for recycling.

The invention discloses a process for producing potassium chloride by using potassic salt ores, which comprises the following steps: firstly, crushing potassic salt ores into particles with a size of 2-5 mm; then, adding the particles into a decomposition crystallizer through an electromagnetic oscillator, and simultaneously adding fresh water and circulated saturated fluid KCl-NaCl-MgCl2-H2O quanternary-system brine into the decomposition crystallizer, wherein in the process of adding, the circulated brine and raw ores are simultaneously fed into a reaction area of the decomposition crystallizer, and the fresh water is added at the junction of the reaction area and a crystallization area of the decomposition crystallizer; driving a bottom flow of the decomposition crystallizer into a flotation machine to carry out flotation, wherein the flotation is implemented sequentially through primary rougher flotation, primary scavenging and primary or secondary fine flotation; and carrying out washing, centrifugal dehydration and drying on concentrates subjected to fine flotation so as to obtain a potassium chloride product. The process disclosed by the invention is simple in production process and easy to operate, and has no restriction on the content of each component of the raw material potassic salt ores. Produced potassium chloride products are good in quality, large in particle size, and can be easily filtered and subjected to centrifugal dehydration, the energy consumption is reduced in the process of drying, and a phenomenon of blocking is uneasily caused, thereby bringing convenience to users.

The invention discloses a fruit tree ecological fertilizer prepared from the raw materials of, by weight: 300-340 parts of dried live stock and poultry manure, 60-70 parts of weathered coal, 30-35 parts of fly ash, 10-12 parts of plant ash, 10-12 parts of humic acid, 20-24 parts of urea, 13-16 parts of potassium chloride, 8-10 parts of potassium dihydrogen phosphate, 6-9 parts of magnesium chloride, 1-2 parts of sulfur, 6-9 parts of an EM inoculant, 10-15 parts of a soil conditioner, and proper amount of water. According to the fertilizer, dried live stock and poultry manure is adopted as a main raw material, and the ecological fertilizer is prepared through microbial fermentation and composting. The ecological fertilizer is rich in various functional microbes and rich trace elements, and assists in improving soil structure. The fertilizer has nourishing, conditioning, and health-care functions upon crop growth. Also, the added fly ash has a porous honeycomb tissue, and has high specific surface area, high absorption activity, and high water absorption performance. The other components in the humic acid fertilizer are combined, and have synergetic effects in improving soil, stimulating crop growth, improving agricultural product quality, and the like.

A deironing boride flux for Mg-alloy contains magnesium chloride, potassium chloride, sodium chloride, calcium chloride, calcium fluoride, barium chloride, and boron oxide and/or sodium borate as deironing agent. Its advantages are high power removing impurities and Fe from molten Mg-alloy, easy separation, and low cost.

The invention discloses a preparation method and application of a lead-polluted soil restoration material. The preparation method comprises the following steps: 1) dipping, concretely, dispersing nanometer hydroxylapatite in water, performing ultrasonic processing, adding potassium chloride, then adding bagasse, uniformly stirring, separating, and drying; and 2) performing pyrolysis, concretely, performing pyrolysis on the dried material in a protective atmosphere, so as to obtain a black solid, and grinding, so as to obtain the target material. A preparation method of biological carbon comprises the following steps: 1) drying, concretely, crushing agricultural wastes and drying; and 2) performing pyrolysis, concretely, performing pyrolysis on dried bagasse in a protective atmosphere, grinding and sieving. Application of the prepared lead-polluted soil restoration material to in-situ restoration of lead-polluted soil is disclosed. The in-situ restoration method for lead-polluted soil comprises pouring the prepared lead-polluted soil restoration material to soil, then adding water and uniformly mixing. The prepared restoration material is applicable to in-situ restoration of lead-polluted soil and is high in restoration efficiency.

The invention relates to an extremely-low sperm freezing protective agent and application thereof. The protective agent is prepared from the following ingredients: sodium chloride, potassium chloride, magnesium sulfate, monopotassium phosphate, calcium chloride, fructose, trehalose, sodium citrate, glycin, glutamine, pentoxifylline, vitamin E, HAS (human serum albumin), glycerin and gentamicin sulphate. The extremely-low sperm freezing protective agent can protect less sperms with low activity and without forward activity ability in seminal fluid, can remarkably improve the activity ability of the sperms which swing weakly and cannot move forwards in seminal fluid after freezing and thawing, has no obvious influence on the physiological function of the sperms, has high freezing anabiosis rate, can be used for cryopreservation of less and weak sperms, testicle sperms and epididymis sperms, and contributes to the successful development of assisted reproductive technology.

The invention provides a preserving fluid and a preparation method therefor. The preserving fluid is used for preserving umbilical cords and/or placentas. The preserving fluid comprises 50-60g/L of dextran, 6-7g/L of sodium chloride, 200-250mg/L of calcium chloride, 200-400mg/L of potassium chloride, 1-1.2g/L of glucose and 10-30g/L of human serum albumin. The invention further discloses a preparation method for the preserving fluid. Compared with a conventional preserving fluid, the preserving fluid disclosed by the invention reduces the metabolism amount of umbilical cord tissue cells in a process of preserving the umbilical cords, and also can provide certain basic nutrient substances and energy substances to keep a low metabolism level, so that the cell activity is in a stable state, and the conditions such as shape variation or differentiation due to growth and cultivation are avoided; and moreover, the dextran in the components has an anticoagulation effect and can prevent the blood agglutination, so that the interference on the follow-up separation operation is avoided.

A sports-type beverage for providing water, minerals, vitamins, trace element and energy, improving immunity and delaying sanility is proportionally prepared from 13 raw materials including oligochitose, powder of seabuckthorn fruit, octacosanol, sodium chloride, glucose, etc. Its preparing process is also disclosed.

The invention discloses hepatic stem cell preserving solution and applications of the hepatic stem cell preserving solution. The hepatic stem cell preserving solution provided by the invention is prepared by fixing the volume of injection solution including 0.1 to 1g of human albumin, 2.60 to 4.97g of sodium chloride, 2.48 to 4.74g of sodium gluconate, 1.82 to 3.40g of sodium acetate, 0.18 to 0.35g of potassium chloride, 0.15 to 0.28g of magnesium chloride, and 0.4 to 0.7mL of heparin calcium based on effective dose by water to be reach to 100mL. The hepatic stem cell preserving solution provided by the invention is used for storing hepatic stem cells, and the survival rate of the hepatic stem cell is more than 85% and even more than 95% within 12 hours. The cell suspension which is obtained by floating the hepatic stem cells on the hepatic stem cell preserving solution can be used as the medicine for treating diabetes mellitus, and has the characteristics of being high in stability, good in curative effect, high in safety, being without toxic or side effect, convenient to store and transport, applicable to massive clinical use, and broad in application prospect. The hepatic stem cell preserving solution brings good news for diabetic patients, and provides a new way for clinical stem cell use.

The invention discloses a production process of refined potassium chloride, in particular to a process for refining 90% potassium chloride into more than 97% food grade potassium chloride. The process comprises the following steps of: adding 90% potassium chloride into a potassium chloride saturated solution (circulating solution) at room temperature to obtain a supersaturated solution; filtering the supersaturated solution by using a coarse filter, heating to 100-105 DEG C, and fully dissolving potassium chloride; filtering the high temperature saturated solution by using a heat insulating filter to obtain a refined saturated solution; cooling and crystallizing the refined saturated solution by a vacuum cooling crystallizer, dewatering by a centrifugal machine, and drying by a drying bed to obtain refined food grade potassium chloride, and returning the mother solution separated from the centrifugal machine back to the system to be used as a circulating solution. The method can be used for effectively removing soluble impurities and insoluble substances in the 90% potassium chloride product, and the content of the product achieves more than 97% and reaches the standard of food grade potassium chloride. The invention has the advantages of simple equipment, short process flow, no environment pollution and easy realization of industrialization.

The invention relates to a solid sports beverage. Based on the molar concentration range of every 500 milliliters of water, the solid sports beverage is prepared from the following solutes based on a weight ratio: 0.6-1.2g of sodium chloride, 0.05-0.12g of potassium chloride, 0-2g of sugar, 0.05-0.2g of vitamin C, 0.005-0.02g of vitamin B6 and 12.5-100mu g of vitamin B12. The solid sports beverage does not contain components adverse to human health, such as stabilizer, colorant, carbonic acid and the like; and because of the solid state, the solid sports beverage is convenient to carry. In use, the solid sports beverage can be infused into a low-permeability beverage based on the body permeation principle, thereby facilitating absorption by human body, quickly complementing energy, electrolytes, vitamins and other required components and realizing the alleviation and the accelerated elimination of fatigue. Besides, the solid sports beverage is simple and convenient to prepare, and is convenient for storage, transportation and acquisition.

The invention discloses a soda water beverage and a preparation method thereof. The soda water beverage comprises raw materials in parts by weight added to every 1,000 kg of water as follows: 100-300 g of sodium bicarbonate, 40-120 g of acesulfame, 15-45 g of magnesium sulfate, 1-3 g of potassium chloride and 75-225 g of lemon essence, and the PH value of the soda water beverage is 7.1-8.5. The technological process of the soda water beverage comprises following steps: (1), equipment cleaning and sterilization; (2), raw water treatment; (3), blending; (4), soda water sterilization; (5), bottle and bottle cap disinfection; (6), filling and packaging. The soda water beverage is helpful to relieve symptoms such as indigestion, constipation and the like and is helpful to uric acid excretion, thereby having prevention and treatment functions on hyperuricemia or gout; in hot summer, sodium in the soda water can supplement sodium lost through sweat volatilization, and the soda water beverage is quite popular fashion drink; primary and secondary reverse osmosis devices are adopted for an efficient desalination technology, impurities such as inorganic ions, bacteria, viruses, metal ion organic matters, colloids and the like in raw water can be removed, high-quality highly-pure water is obtained, the operating cost is saved, and environmental protection is facilitated.

The invention relates to a carrier brightening agent for the potassium chloride galvanization. The carrier brightening agent is fatty alcohol polyoxyethylene ether sulfonate with a structural formula of RO(CH2CH2O)n(CH2)2SO3M or alkylphenol ethoxylate sulfonate with a structural formula of RC6H4O(CH2CH2O)n(CH2)2SO3M, wherein R represents C6 to C14 saturated alkane; n is an integral number in the range of 5 to 30; and M represents alkali metal. The invention also provides a preparation method of the carrier brightening agent. The carrier brightening agent for the potassium chloride galvanization, which is provided by the invention, not only can have an effect of a nonionic surfactant serving as the carrier brightening agent, but also has a high stability in strong electrolyte. Meanwhile, according to the preparation method of the carrier brightening agent, which is provided by the invention, a two-step method is adopted to synthesize the carrier brightening agent, the process is easy to control, the production is easy to implement, the conversion rate is over 90 percent, the cost is low and the preparation method has a strong practicality.

A solid pharmaceutical preparation for dialysis which does not contain any acetic acid and a production process thereof. The solid pharmaceutical preparation for dialysis contains two pharmaceutical preparations: a solid pharmaceutical preparation (A) composed of particles having an average particle size of about 100 μm to 1,500 μm and containing one or more electrolytes selected from sodium chloride, calcium chloride, magnesium chloride, and potassium chloride, and an organic acid other than acetic acid and/or a salt of the organic acid; and a solid pharmaceutical preparation (B) containing sodium bicarbonate.

The invention relates to a carragheenan and potassium chloride gelled hydroxypropyl methylcellulose enteric-coated hollow capsule, and belongs to the technical field of the production of hollow capsules. The hollow capsule is characterized in that the hollow capsule is prepared through mixing a main raw material hydroxypropyl methylcellulose with carragheenan and potassium chloride under a special condition, the hollow capsule has the characteristics of timely disintegration, low water content, suitableness for medicines having strong hygroscopic property and being sensitive to water, small influences of a dissolve-out medium to the shell of the capsule, high drug compliance, long storage duration data, no deterioration within 3-4 years, low condition requirements on the storage and the transportation, difficult crushing in the low humidity environment, difficult deformation, putrefaction and deterioration in the high temperature environment, according with the requirements of populations having all culture backgrounds because of pure vegetable fibers, almost no pollution in the production process, secondary re-dissolving utilization of tailings, omission of the commonly-used surfactants and plasticizers, acceleration of the gelling speed by reducing the gelling temperature only through utilizing potassium chloride to assist the carragheenan, additive reduction, production cost reduction, and suitableness for the mass popularization.

A taste improving agent for food and beverage containing potassium chloride that can effectively relieve unpleasant tastes, such as bitter taste and harsh taste, attributed to potassium chloride without detriment to the flavor of the food and beverage; a process for producing a food and beverage containing potassium chloride of high palatability having the bitter taste and harsh taste of potassium chloride suppressed; and a food and beverage containing potassium chloride produced by the production process. Use is made of a taste improving agent comprising a basic amino acid and/or a basic peptide as an active ingredient. It is preferred that the basic amino acid be at least one member selected from among histidine, arginine and lysine and the basic peptide at least one member selected from among anserine, carnosine and balenine. This taste improving agent is added to a food and beverage containing potassium chloride, thereby obtaining a food and beverage containing potassium chloride with improved taste.

A production process of preparing high-quality potassium chloride from carnallite includes the steps of 1) crushing carnallite ore; 2) adding the crushed carnallite ore to a decomposition crystallizer filled with saturated mother liquid; 3) adding fresh water or a washing mother liquid obtained in subsequent processes into the decomposition crystallizer; 4) stirring the slurry so that a quasi-closed loop circulation flowing status that the ore slurry flows from bottom to top in a flow guide cylinder and flows from top to bottom in an annular chamber being adjacent to the external side of the flow guide cylinder is formed, and during the flowing process, the carnallite is decomposed and the potassium chloride is crystallized; and 5) sieving a bottom flow in the decomposition crystallizer, wherein the oversize substance serves as tailings while the undersize substance is filtered then; and 6) feeding a filtrate to the next process to perform evaporation crystallization to recycle the KCl, and washing, filtering and drying a filter cake. The production process is simple, is low in mechanical loss and energy consumption, is low in production cost, is free of any chemical reagents and is environment-friendly. The potassium chloride product has good quality and large granularity.

The invention discloses a special compound fertilizer for pear trees and a preparation method thereof. The special compound fertilizer for the pear trees comprises the following materials in percentage by weight: 15-30% of sugar residue, 0.2-2% of borax, 0.5-2% of ferrous sulfate, 0.5-2% of zinc sulfate, 12-25% of urea, 15-25% of monoammonium phosphate, 20-30% of potassium chloride, 2-7% of ammonium sulfate, 1-7.5% of biochar and 3-5% of Chinese medicinal materials. The special compound fertilizer for the pear trees is prepared by grinding the above materials, uniformly mixing and granulating. The special compound fertilizer for the pear trees has both quick-acting characteristic like an inorganic fertilizer and long-acting and slow-release characteristics like an organic fertilizer and has the effects of reducing soil bulk density, expelling insects, killing bacteria, enhancing yield and quality of fruits, improving the soil in an orchard and protecting the environment and has a broad application prospects in production of green fruits.

The invention discloses a method for producing potassium sulfate from potassium/chlorine-ion-containing solid waste, which comprises the following steps: leaching potassium/chlorine-ion-containing solid waste with water, wherein the potassium/chlorine ions and other soluble impurity ions enter the water to form a potassium-chloride-containing mixed solution; adding an alkaline matter into the mixed solution to regulate the pH value of the solution, thereby performing primary impurity removal; adding soluble carbonate into the solution to perform secondary impurity removal; carrying out solid-liquid separation; adding ammonium sulfate into the filtrate; after the sulfating reaction, adding alcohol to precipitate potassium sulfate; after the potassium sulfate precipitation reaction, carrying out solid-liquid separation; drying the filter residue to obtain the potassium sulfate product; adding the filtrate into a concentration and crystallization device to perform concentration and crystallization, and carrying out solid-liquid separation, wherein the filter residue is the potassium-containing ammonium chloride product. By using the method, the recovery rate of K2O in the product is not less than 91% in the potassium-chloride-containing mixed solution.

The invention provides compositions and methods for reformulating foodstuffs to reduce sodium content, while significantly enhancing salt perception and minimizing additional bitterness. In certain embodiments, the invention provides salt taste enhancing compositions including a blend of three potassium salts—namely, potassium chloride, monopotassium phosphate, and potassium citrate—which, when used in conjunction with sodium chloride, significantly enhances the salt perception in foods and beverages, while imparting no or limited bitter aftertaste. In other embodiments, the invention provides salt taste enhancing compositions including potassium chloride in combination with an organic acid and, optionally, an organic acid salt of potassium.

The invention discloses a process for extracting potassium chloride from native sylvite ore, which comprises the following steps of: (1) crushing the ore: coarsely crushing the sylvite ore; (2) performing floatation: performing floatation in saturated motor solution at normal temperature and normal pressure, and adding an inhibitor modified cellulose, a collector alkyl fatty amine and an auxiliary collector unsaturated aliphatic hydrocarbon, wherein the floatation process comprises twice rougher floatation and twice concentration, and middlings in the concentration are sequentially returned for re-concentration; (3) dewatering and size mixing: dewatering products in a tank after primary rougher floatation and before secondary rougher floatation until the pulp concentration is 50 to 70 percent, and performing size mixing; and (4) washing concentrate: mixing washing water and a proper amount of floatation saturated mother solution, performing size mixing, washing and filtering on the floatation concentrate. The process ensures that the flow is reasonable, the selected granularity is high, the granularity of tailings is high, the ore is easy to dewater and convenient to refill, the energy consumption is low and the operation is simple, and is suitable for extracting a potassium chloride product used for agriculture and industry, which meets the national standard, from the native sylvite ore.

The invention provides a litchi preservative which consists of the following components in parts by mass: 3-5 parts of lignin, 2-3 parts of sucrose ester, 1-1.5 parts of sodium sorbate, 0.8-1.2 parts of citric acid, 1-1.5 parts of potassium chloride, 0.5-0.6 part of calcium stearate, 0.2-0.3 part of chitin and 180-190 parts of water. The litchi preservative provided by the invention is simple to prepare, reasonable in formula and low in cost; and when in use, the litchi preservative is convenient to operate, realizes a good preservation effect and can prolong the litchi preservation time by 20-30 days.