Potassium Sulfate Powder CAS 7778-80-5

Shaanxi BLOOM Tech Co., Ltd. is one of the most experienced manufacturers and suppliers of potassium sulfate powder cas 7778-80-5 in China. Welcome to wholesale bulk high quality potassium sulfate powder cas 7778-80-5 for sale here from our factory. Good service and reasonable price are available.

Potassium sulfate powder is an inorganic salt with the chemical formula K2SO4,CAS 7778-80-5. It is a white crystalline powder with a bitter and salty taste. Soluble in water, insoluble in ethanol, acetone and carbon disulfide. The appearance of agricultural potassium sulfate is mostly light yellow. It has low moisture absorption, is not easy to caking, has good physical properties, and is easy to use. It is a good water-soluble potassium fertilizer, and is also the main raw material for making chlorine free nitrogen, phosphorus, and potassium ternary compound fertilizer.

Potassium sulfate powder (chemical formula K₂SO₄) is an inorganic salt. Due to its unique chemical properties and wide applicability, it has become a key raw material in agriculture, industry, medicine and other fields. Its core value lies in providing two essential elements, potassium (K) and sulfur (S), at the same time, and does not contain chloride ions (Cl⁻), avoiding the potential harm of chlorine accumulation to soil and crops.

1. Agricultural field: "Nutrient engine" for crop growth

 

Potassium sulfate is one of the most widely used potassium fertilizers in agriculture, especially suitable for chlorine-sensitive crops (such as tobacco, grapes, potatoes) and saline-alkali land improvement. Its mechanism of action and effects are as follows:
1. Nutrition supply and metabolic activation
Potassium: As an activator of more than 40 enzymes in plants, potassium is directly involved in photosynthesis, respiration and protein synthesis. For example, in photosynthesis, potassium promotes the transportation and conversion of photosynthetic products (such as glucose), making the leaves dark green and thick, and increasing the solid content of fruits by 15%-20%. At the same time, potassium enhances the toughness of straw, increasing the lodging resistance of tall crops such as wheat and rice by more than 30%.

 

Sulfur: Sulfur is a component of sulfur-containing amino acids such as cysteine and methionine, and is essential for protein synthesis. Applying potassium sulfate to sulfur-deficient soil can increase the protein content of crops by 10%-15%, and promote the accumulation of nutrients such as vitamin A and glucose.

2. Improved root development and stress resistance
Potassium sulfate stimulates root cell division and elongation, making the root system more developed. Experiments show that under drought conditions, the water absorption capacity of corn roots applied with potassium sulfate increases by 25%, and drought resistance is significantly enhanced.
Potassium regulates cell osmotic pressure, reduces the risk of intracellular freezing, and increases the cold resistance of crops by 20%-30%. In addition, potassium thickens the cell wall, forms a physical barrier, reduces the invasion of pathogens, and reduces the incidence of diseases and insect pests by 15%-20%.

 

3. Quality optimization and yield increase
Fruit crops: Potassium sulfate promotes sugar transport, increases the sugar content of watermelons and melons by 2-3 degrees, increases the solid content of tomatoes by 10%, makes coloring more uniform, and increases the commercial rate by more than 20%.
Grain crops: After applying potassium sulfate to wheat, the gluten content of flour is improved and the processing powder rate is reduced by 15%; the thousand-grain weight of corn grains increases by 5-10 grams, and the yield increases by 10%-15%.
Tuber crops: Potassium sulfate is applied during the tuber expansion period of potatoes, ginger, etc., and the yield per plant increases by 20%-30%, and the storage period is extended by 1-2 months.

 

4. Soil improvement and ecological protection
The sulfate ions (SO₄²⁻) in potassium sulfate can replace the sodium ions (Na⁺) in the soil, alleviate salinization, and improve soil permeability. In the saline-alkali land experiment, after continuous application of potassium sulfate for 3 years, the soil pH value decreased by 0.5-1.0 units, and the crop emergence rate increased by 25%.
As a chlorine-free fertilizer, potassium sulfate avoids the accumulation of chloride ions in the soil, reduces the pollution of groundwater, and meets the needs of sustainable agricultural development.

2. Industrial field: "Basic module" of material synthesis

 

Potassium sulfate is widely used in glass, ceramics, printing and dyeing, chemical reagents and other fields as raw materials or auxiliary materials in industry. Its value is reflected in functional optimization and process improvement.
Chemical reagents and material synthesis
Potassium sulfate is a raw material for preparing compounds such as potassiu persulfate (K₂S₂O₈) and potassiu carbonate (K₂CO₃). For example, potassiu persulfate is used in circuit board etching liquid, and its etching accuracy can reach 0.1 mm, meeting the needs of high-end electronic manufacturing.
In the field of nanomaterials, potassiu sulfate can be used as a template to synthesize mesoporous silica with uniform pore size, which is used as a drug sustained-release carrier or catalyst carrier.

3. Pharmaceutical field: "Invisible assistant" for health protection

 

Potassium sulfate powder is mainly used in pharmaceutical preparations and medical examinations in medicine, and its safety and biocompatibility have been widely verified.
Pharmaceutical preparations
Potassium sulfate is used as an osmotic pressure regulator in the preparation of intravenous injections to ensure that the osmotic pressure of the drug solution is consistent with that of the blood and reduce infusion reactions. For example, in compound sodium chloride injection, the addition of potassium sulfate stabilizes the osmotic pressure at 280-310 mOsm/kg, which meets the pharmacopoeia standards.

 

As a filler, potassiu sulfate is used in tablet production to improve drug fluidity and compressibility. Experiments show that the hardness of tablets with 5% potassiu sulfate increased by 20% and the disintegration time was shortened by 30%.

Medical examination
Potassiu sulfate solution is used for biochemical examination of serum protein, and quantitative analysis is achieved by precipitating protein. The sensitivity of this method is 0.1 g/L, and the error rate is less than 2%, which is an important means of clinical diagnosis.
In renal function examination, potassiu sulfate is used as a contrast agent carrier to improve the clarity of X-ray development and assist doctors in accurately judging the condition.

Other fields: "multi-functional players" across industries

 

The use of potassium sulfate also extends to food, water treatment, environmental protection and other fields, showing its cross-industry adaptability.
Food industry
Potassium sulfate is used as a potassiu salt raw material for the production of low-sodium salt. By replacing part of sodium chloride (NaCl), the sodium content of food can be reduced by 30%-50%, meeting the health needs of people with hypertension.
In bread baking, potassiu sulfate is used as a leavening agent to make the dough ferment more fully, increase the volume of bread by 15%-20%, and make the taste softer.

 

Water treatment
Potassium sulfate is used to adjust the hardness of water. By forming precipitation with calcium and magnesium ions, it reduces the hardness value of water (calculated as CaCO₃) by 50-100 mg/L and prevents scaling of pipes.
In sewage treatment, potassiu sulfate is used as a flocculant auxiliary to increase the removal rate of suspended solids by 10%-15% and reduce treatment costs by 20%.
Environmental protection field
Potassium sulfate is used in flue gas desulfurization process. It reacts with sulfur dioxide (SO₂) to generate potassiu hydrogen sulfate (KHSO₄), reducing the emission of atmospheric pollutants. Experiments show that this process can reduce the SO₂ concentration in flue gas from 2000 mg/m3 to below 100 mg/m3, with a compliance rate of 100%.

At present, the main production methods of potassium sulfate powder include Mannham method, combination method, double decomposition method, etc.

1) Mannham process: Mannham process is a process of producing potassium sulfate using sulfuric acid and potassium chloride as raw materials. Its production method is to use potassium chloride and concentrated sulfuric acid to react in a Mannham furnace step by step. First, the reaction generates potassium bisulfate, and then continues to react with potassiu chloride at a higher temperature to generate potassium sulfate; Heavy oil or gas fuel is used to supply heat in the combustion chamber of the reaction furnace. The temperature is 1000~1100 ℃, and the temperature of the reaction chamber is controlled at 520~540 ℃. Reaction product

The product is obtained after the substance is cooled, crushed and partially neutralized. The by-product HCl is cooled, washed and absorbed to obtain hydrochloric acid with a mass fraction of 32%~35%. The process is mature, the product potassiu sulfate has high grade, almost no loss, and the yield of potassium is high; However, because the reaction is under the condition of strong acid and high temperature, the equipment is severely corroded, and the production capacity of a single furnace is small, generally 100000 t/a, and the sales of a large number of by-product liquid hydrochloric acid directly affect the production of potassiu sulfate.

2) Association method: The association method uses potassium chloride, sulfuric acid and organic solvent as raw materials to produce potassium sulfate through association, replacement and association reactions. The process principle is to use the different affinity of organic solvent to hydrochloric acid and sulfuric acid to prepare potassiu sulfate. In this process, the organic solvent has a great influence on the yield and quality of potassium sulfate. Domestic scholars used liquid ammonia, high boiling point organic solvent, composite organic solvent, etc. as binding agents to improve and optimize the process parameters, greatly reducing energy consumption and increasing the yield of potassium, so that the yield of potassium can reach more than 95%. If high boiling point organic solvent is selected, the energy consumption of potassium sulfate per ton of product is about 200 kg of standard coal, which is much lower than that of Mannham process; The compound organic solvent used as binding agent has low requirements for raw materials and strong adaptability. For example, dilute sulfuric acid or waste acid can also be used. Compared with Mannham process, the combined process has the advantages of mild operating conditions, less equipment corrosion, low energy consumption, short production time, basically no "three wastes" and by-product ammonium chloride; However, this process is not mature enough, such as small production scale, dissolution loss of binding agent, and toxicity of most organic solvents.

1) Ammonium sulfate method:

Ammonium sulfate method is a method to prepare potassiu sulfate and ammonium chloride by using the double decomposition reaction of ammonium sulfate and potassium chloride in solution and the difference of product solubility. The reaction formula is as follows:

Through experimental research, it is found that the reaction time, solvent concentration, initial concentration of ammonium sulfate, ingredient ratio and reaction temperature of the process have a great influence on the yield of potassiu sulfate, and the order of influence is: reaction time>solvent concentration>initial concentration of ammonium sulfate>ingredient ratio>reaction temperature. In the process of production, methanol and other organic solvents were added, and the yield of K₂O could reach 93.40% under the optimal process conditions. The production of potassium sulfate by ammonium sulfate method, although the investment is small, and the secondary conversion can also produce high-quality products, has high product cost, small production scale, low yield, and poor economic benefits, and there are still some technical obstacles.

2) Calcium sulfate method:

Calcium sulfate method, also known as gypsum method, is divided into one-step and two-step conversion methods. The one-step conversion method uses ammonia as the catalyst, gypsum and potassiu chloride directly react in the saturated solution of ammonia to produce potassium sulfate, and calcium chloride is by-product. The reaction formula is as follows:

In the two-step conversion method, ammonium bicarbonate reacts with gypsum to produce calcium carbonate and ammonium sulfate, and ammonium sulfate reacts with potassium chloride to produce potassium sulfate, which can jointly produce light calcium carbonate.

3) Glauber's salt method:

Glauber's salt conversion method is the most studied and most in-depth method for preparing potassiu sulfate so far. Its theoretical basis is the multi temperature phase diagram of the Na+, K+//Cl -, SO2 - 4 - H2O quaternary water salt system. The phase diagram is analyzed, and the best production process conditions are obtained through material calculation. This method is mainly divided into two steps: the first step is at 25 ℃, and the second step is at 60~100 ℃. According to the difference of solubility of various salts at different temperatures, crystallization separation is carried out to produce potassiu sulfate and sodium chloride as a by-product. A lot of research by domestic scholars found that the reaction temperature, ingredient ratio, water balance, impurities in raw materials, etc. of the process have a great impact on the conversion rate of potassiu ions and the quality of potassium sulfate. In view of these factors, the influence of temperature on the preparation of potassiu sulfate from potassiu chloride mirabilite conversion was studied. It was found that in the first stage of reaction, with the increase of temperature, the chloride ion content in the intermediate products of potassiu mirabilite and potassium sulfate products increased, while the potassium ion content decreased; When the temperature is higher than 30 ℃, the product potassiu sulfate cannot reach

ZBG21006-1989. Therefore, the temperature of primary conversion should be controlled below 30 ℃.

4) Ferrous sulfate method:

Ferrous sulfate method is a method to produce potassiu sulfate by double decomposition reaction of ferrous sulfate and potassium chloride in industrial by-products such as copperas, pyrite cinder and other by-products of titanium dioxide under the theoretical guidance of K+, Fe2+//Cl -, SO2 - 4-H2O quaternary phase diagram. The production method of this method mainly includes: 1) ferrous sulfate reacts with potassiu chloride to generate double salt, and the double salt is decomposed to generate potassium sulfate. The process flow is simple, the operation and control is convenient, the corrosion to equipment is small, the raw materials are cheap and easy to get, and the raw material consumption is low, and there is no "three wastes" generated in the production process; 2) Ferrous sulfate reacts with ammonium bicarbonate to produce ammonium bisulfate, and ammonium bisulfate reacts with potassiu chloride to produce potassiu sulfate; 3) Ferrous sulfate is hydrolyzed to ferric hydroxide and sulfuric acid, and then sulfuric acid reacts with potassiu chloride to generate potassium sulfate. This reaction cannot be carried out spontaneously. In this technology, 20% (mass fraction) TOA (trioctyl ammonia)+10% (mass fraction) TBP (tributyl phosphate)+70% (mass fraction) n-octanol is used as the extraction system to extract H2SO4 from FeSO4 aqueous solution, so that Fe2+is hydrolyzed and precipitated, so that the reaction can be carried out in the direction of producing potassium sulfate. The technology of producing ferric oxide, potassiu sulfate and ammonium chloride by using titanium dioxide as raw material in liquid phase, developed by the Institute of Soil and Fertilizer, Chinese Academy of Agricultural Sciences, can achieve a conversion rate of 98.5% ± 0.5% for potassium sulfate.

The main methods for extracting potassium sulfate from sea water or brine are: high temperature salt method, flotation method, cyclone method, alkali making waste liquid and salt field brine ammonia method, liquid membrane method, etc. The magnesium sulfate subtype brine of Lop Nur Salt Lake is used as the initial raw material to obtain potassiu chloride and soft potassium magnesium alum by decomposition, conversion and flotation, and the potassium chloride and soft potassiu magnesium alum obtained are then converted and crystallized to obtain potassium sulfate. Guided by the theory of K+, Mg2+//Cl -, SO2 - 4-H2O quaternary metastable phase diagram, a method for producing potassium sulfate from potassium mixed salt produced from sulfate brine and carnallite was invented. The process flow is divided into five processes: decomposition filtration, conversion screening, filtration, potassium sulfate synthesis, and filtration drying. The process has the advantages of low production cost, high utilization rate of raw materials, simple process and high product quality. China's potash minerals are mainly liquid minerals deposited in inland lakes, accounting for more than 95% of the total resource reserves, which has huge development potential. Therefore, it is of great significance to directly extract potassium sulfate from seawater or brine to alleviate the shortage of potash fertilizer in China.

The main methods for extracting potassiu from solid potassiu ore include: pressure heating, high temperature volatilization, direct method, ion exchange method, low temperature acid hydrolysis, flotation method, microbial method and roasting method. Various methods for extracting potassium from potassium ores generally have many shortcomings, such as more slag, high energy consumption, and low effective K2O in products. Therefore, it is difficult to industrialize various technical methods. China's soluble potassium ore (except for the limited solid potassium ore in the Simao area of Yunnan, which mainly uses the solution flotation method to produce potassiu chloride) is seriously lacking in resources, but the insoluble potassium ore resources represented by potassium feldspar are extremely rich, and the national potassiu feldspar resources are more than 10 billion tons. Therefore, it is of practical significance to increase resource and technology investment and carry out effective development and utilization research of insoluble potassium feldspar resources for solving the current situation of potassiu shortage in China to a certain extent.

For special raw materials and resources, other methods to produce potassiu sulfate include ion exchange method, hot potash method, microwave radiation method, waste acid straw method, membrane separation method, etc. Aiming at the sea brine resources, Yuan Junsheng studied the new technology of extracting potassiu sulfate from sea water and bittern by zeolite method, and completed the pilot test of 300 t/a potassiu sulfate and 200 t/a potassium nitrate. It is of great significance to upgrade China's traditional sea salt and salt chemical industry chain and make full use of sea salt bittern resources. In recent years, a patented invention has studied the microwave radiation method for preparing potassiu sulfate from potassiu chloride and sulfuric acid, which is mainly a new method for producing potassiu sulfate by mixing raw materials in proportion and reacting under microwave radiation. Compared with the existing technology, it has the characteristics of fast reaction speed, short production cycle, stable quality, no pollution to the environment, energy saving and cost reduction. Potassiu sulfate products contain high nitrogen content, various microelements such as sulfur, calcium, magnesium, iron, manganese, copper, zinc, boron, etc., and are rich in organic matter and amino acids. They are full nutrition and environment-friendly compound fertilizers. The membrane separation method uses sulfuric acid and potassium chloride as raw materials, and uses membrane distillation reactor to produce potassium sulfate. It has the advantages of low energy consumption and no chlorine in the product. However, due to the need to import more exchange membranes, the production cost is greatly increased. 

Hot Tags: potassium sulfate powder cas 7778-80-5, suppliers, manufacturers, factory, wholesale, buy, price, bulk, for sale, Synthetic Chemical, DIMETHYLPHOSPHINE OXIDE, 2 4 Quinolinediol, Methylamine hydrochloride powder, 2 5 Dihydroxybenzaldehyde, 3 Nitrobenzaldehyde 99