What do you know about ammonium sulfate? The more complete, the better 200

Ammonium acid is referred to as ammonium sulfate, white crystal, nitrogen content of 21%, soluble in water, not easy to absorb moisture, easy to store and apply, but often hygroscopic and agglomerated in wet and rainy seasons, so when storing, pay attention to ventilation and drying. Ammonium chloride is also white crystal, containing 24-25% nitrogen, slightly greater hygroscopicity than ammonium sulfate, soluble in water, and rapid fertilizer efficiency. Both are physiologically acidic fertilizers.

Therefore, frequent application of ammonium sulfate or ammonium chloride will increase soil acidity. The degree of soil acidification of ammonium chloride is more serious than that of ammonium sulfate, and long-term application of ammonium chloride alone will also cause soil compaction. Therefore, the application of ammonium sulfate or ammonium chloride on acidic soil should be combined with organic fertilizer and lime application in order to neutralize acidity, supplement calcium and enhance the buffering capacity of the soil.

Soil properties of the applicable area).

Molecular weight: Molecular formula (NH4)2SO4

Alias chemical name ammonium sulfate, fertile field powder.

Properties: Ammonium sulfate for industrial use is white crystalline. The crystals of ammonium sulfate for agriculture are slightly yellow or brown, and ammonium sulfate has a salty taste. It is easy to absorb moisture in the air and bond into lumps. Soluble in water, it is an acidic fertilizer.

Uses Agricultural fertilizers and industrial raw materials such as chemicals, dyeing and weaving, medicine, leather, etc.

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Ammonium sulfate (NH4)2SO4, containing about 20 nitrogen, referred to as ammonium sulfate, commonly known as fertilizer powder, is the earliest nitrogen fertilizer variety used and produced in China, accounting for about the total output of nitrogen fertilizer in China. The nitrogen form is ammonium ion (NH4+), which is an ammonia nitrogen fertilizer. The preparation of ammonium sulfate is to use synthetic ammonia or ammonia, a by-product of industrial production such as coking, oil refining, organic synthesis, etc., and then neutralize it with sulfuric acid, and the reaction formula is:

2nh3+h2so4→(nh4)2so4

Ammonium sulfate products are generally white products, if the product is mixed with impurities with yellow or gray, the physical properties are stable, the decomposition temperature is high (greater than 280), it is not easy to absorb moisture, but it is difficult to break after agglomeration. Ammonium sulfate is easily soluble in water, the solubility is 70 at 20, and it is a neutral reaction in water, and it is also slightly acidic because there are often free acids in the product.

In addition to nitrogen, ammonium sulfate also contains 25 sulfur and is also an important sulfur fertilizer.

The molecule of ammonium sulfate contains the anion SO4-, which is difficult to be adsorbed by soil particles, and the absorption of ammonium ions by crops is more, so SO4- remains in the soil, so ammonium sulfate is a typical physiological acid fertilizer. Ammonium sulfate is applied on calcareous soil rich in calcium carbonate, which forms insoluble calcium sulfate with CaCO3, which does not significantly affect the pH value of the soil. However, for neutral and acidic soils, the residual SO4- will be combined with H+ to reduce the pH value of the soil and acidify the soil, and measures such as lime application are required to prevent acidification.

Under flooding conditions, SO4- will be reduced to H2S, causing rice roots to turn black and affecting the absorption of nutrients by roots. It should be combined with drainage to improve the aeration conditions and avoid the production of black roots.

Ammonium sulfate can be used as basal fertilizer, top dressing and seed fertilizer. When used as seed fertilizer, it is necessary to pay attention to the amount should not be too much. Ammonium sulfate interacts with calcium carbonate in calcareous soils to generate ammonia and runs away; In acidic soil, if ammonium sulfate is applied to the surface layer of paddy field with good aeration, ammonium nitrogen is easily converted into nitrate nitrogen through nitrification, and after being transferred to the deep layer, nitrogen and nitrogen oxide gas are generated into the air due to hypoxia and denitrification.

Therefore, whether in paddy fields or dry fields, ammonium sulfate should be applied deeply.

By: frankwu890224 - Manager Level 4 7-21 13:08

In addition to nitrogen, ammonium sulfate also contains 25 sulfur and is also an important sulfur fertilizer.

The molecule of ammonium sulfate contains the anion SO4-, which is difficult to be adsorbed by soil particles, and the absorption of ammonium ions by crops is more, so SO4- remains in the soil, so ammonium sulfate is a typical physiological acid fertilizer. Ammonium sulfate is applied on calcareous soil rich in calcium carbonate, which forms insoluble calcium sulfate with CaCO3, which does not significantly affect the pH value of the soil. However, for neutral and acidic soils, the residual SO4- will be combined with H+ to reduce the pH value of the soil and acidify the soil, and measures such as lime application are required to prevent acidification.

That's all I know!

Concentrated sulfuric acid is a slightly yellow viscous liquid, concentrated sulfuric acid has strong oxidation, dehydration, dissolved in water to release a large amount of heat, mixed with water should be poured into water. It is a catalyst for esterification reaction, sugar hydrolysis, etc., and is an important raw material for industry, and the hot concentrated sulfuric acid can also be passivated with iron and aluminum.

Ammonium sulfate is an inorganic substance with the chemical formula (NH4)2SO4, colorless crystals or white particles, and odorless. 280 or more decomposed. Solubility in water:

0 hours, 100 hours. Insoluble in ethanol and acetone. The pH of the aqueous solution is.

Relative density. Refractive index. Ammonium sulfate is mainly used as a fertilizer and is suitable for a variety of soils and crops.

It can also be used in textile, leather, medicine, etc.

Physical. inchi=1/;;1-5(2,3)4/h2*1h3;(h2,1,2,3,4)

Appearance and properties: white crystalline powder.

Melting Point: 230-280

Refractive index (relative density:

Solubility: 0 solubility, dissolution, dissolution, dissolution,

Chemical properties. White crystalline powder, aqueous solution is acidic. Insoluble in alcohol, acetone and ammonia. It is hygroscopic and consolidates into lumps after moisture absorption.

Heated to 513 or more, it completely decomposes into ammonia, nitrogen, sulfur dioxide and water. When it reacts with alkalis, ammonia gas is released. It reacts with barium chloride solution to form a barium sulfate precipitate.

It is also possible to cause salting out of proteins.

Ammonium sulphate can be used as fertilizer to enhance the resistance of crops to disasters; Ammonium sulfate can also be used in textiles, leather, medicine, etc. Biologically, ammonium sulfate can be used in the field of protein purification process, which can protect the protein activity to the greatest extent during the purification process.

What is ammonium sulfate.

Ammonium sulfate is an inorganic substance, the pure product is a colorless transparent orthorhombic crystal, the chemical formula is (NH4)2SO4, insoluble in alcohol, acetone and ammonia. Ammonium sulfate is odorless, hygroscopic, consolidates into lumps after moisture absorption, and decomposes more than 280. Solubility in water:

0 hours, 100 hours. Insoluble in ethanol and acetone. The pH of the aqueous solution is.

Relative density. Refractive index.

Ammonium sulfate is very soluble and can form a high-salt environment in preparation for protein precipitation and subsequent high-salt purification. The solubility of ammonium sulfate at zero degrees and room temperature 25 degrees is quite different.

Storage precautions: Store in a cool, ventilated warehouse. Keep away from fire and heat sources. It should be stored separately from acids and alkalis, and should not be mixed. The storage area should be equipped with suitable materials to contain the spill.

First-class ammonium sulfate: no visible mechanical impurities in appearance, nitrogen content % free acid content moisture% pure products are colorless orthorhombic crystals, and industrial products are white to light yellow crystals.

The pure product is a colorless transparent orthorhombic crystal, and the aqueous solution is acidic. Insoluble in alcohol, acetone and ammonia[2]. It is hygroscopic and consolidates into lumps after moisture absorption.

Heated to 513 or more, it completely decomposes into ammonia, nitrogen, sulfur dioxide and water. When it reacts with alkalis, ammonia gas is released. It reacts with barium chloride solution to form a barium sulfate precipitate.

It is also possible to cause salting out of proteins.

Ammonium sulfate fractionation: A method in which different proteins can be precipitated with different concentrations of ammonium sulfate, thereby separating the different proteins. Salting-out technology for protein separation and purification.

Ammonium sulfate: colorless crystals or white particles. Odorless.

280 or more decomposed. Solubility in water: 0, 100.

Insoluble in ethanol and acetone. The pH of the aqueous solution is. Relative density.

Refractive index. Ammonium sulfate is mainly used as a fertilizer and is suitable for a variety of soils and crops. It can also be used in textile, leather, medicine, etc.

An excellent nitrogen fertilizer (commonly known as fertile field powder).

Uses of thionine: used as fertilizer, solder, fabric fire retardant, pharmaceutical salting out agent, osmotic pressure regulator, etc., suitable for various soils and crops; used as an analytical reagent for precipitating proteins; used as solder, fabric fire retardant; It is used as a raw material for the production of hydrogen peroxide, ammonium alum and ammonium chloride in the chemical industry, and as a flux in the welding industry. It is used in the textile industry as a fire retardant for fabrics.

It is used as an electroplating bath additive in the electroplating industry. It is used as a nitrogen fertilizer in agriculture and is suitable for general soils and crops.

Chemical properties: The pure product is a colorless transparent orthorhombic crystal. Relative density Solubility Soluble in water (water at 0, water at 100), and the aqueous solution is acidic. Insoluble in alcohol, acetone and ammonia.

(NH4)2SO4 is commonly known as fertile field powder, a salt produced by the reaction of sulfuric acid with ammonia. Before the 60s of the 20th century, it was the main variety of nitrogen fertilizer, and it was also one of the main products that provided crop nutrients sulfur.

Properties: Also known as ammonium sulfate. The pure product is a colorless orthorhombic crystal, which is easily soluble in water. Density.

When heated, it decomposes and loses ammonia and becomes an acid salt. 513 completely decomposes into ammonia and sulfuric acid.

Industrial products are white or light gray-yellow particles. Soluble in water, insoluble in ethanol, acetone, ammonia. Easy to deliquescent.

In the industry, ammonia and sulfuric acid are directly neutralized and obtained, which is not used much at present, and the by-products or exhaust gas emitted in industrial production are absorbed with sulfuric acid or ammonia water (such as sulfuric acid absorbs ammonia in coke oven gas, ammonia absorbs sulfur dioxide in smelter flue gas, ammonia in the production of kapulun or sulfuric acid waste liquid in the production of sulfuric acid titanium dioxide). There are also gypsum methods that use gypsum method to produce ammonium sulfate (using natural gypsum or phosphogypsum, ammonia, and carbon dioxide as raw materials). For a long time, it was mainly used as a fertilizer and was suitable for a variety of soils and crops.

It can also be used in textile, leather, medicine, etc. Edible ammonium sulfate is prepared by adding industrial ammonium sulfate to distilled water and dissolving it, adding arsenic remover and heavy metal remover for solution purification, filtration, evaporation and concentration, cooling and crystallization, centrifugal separation, and drying. used as food additives, dough regulators, yeast nutrients.

The use of waste sulfuric acid and waste ammonia water to produce ammonium sulfate technology, both to protect the environment and to make money, this technology after many times of production of the process technology mature, the process is reliable, the method is simple, the process is short, easy to operate, can save energy. The ammonium sulfate products produced are fully in line with the GB535-85 national standard, which is currently at the leading level in China. According to the local waste ammonia and waste sulfuric acid, the profit per ton of ammonium sulfate ranges from 200-500 yuan.

The raw materials used in the production of ammonium sulfate in this technology are the wastes of some coking plants, steel mills and chemical plants, such as waste ammonia and waste sulfuric acid, which seriously pollute the environment. It can make full use of these wastewater that seriously pollutes the environment, which not only reduces environmental pollution, but also turns waste into treasure, increases income and protects the environment.

Ammonium persulfate is a white crystal with the molecular formula of (NH4)2S2O8, which has strong oxidizing and corrosive properties, is easily soluble in water, increases its solubility in warm water, and can be hydrolyzed into ammonium bisulfate and hydrogen peroxide in aqueous solution. Its dry product has good stability. It will decompose when heated to 120°C, and it is easy to agglomerate when it is humid in humid air.

It is mainly used as an oxidant and the preparation of hydrogen peroxide, potassium persulfate and other persulfates. It can be used as a free initiator for polymerization reactions, especially emulsion polymerization and redox polymerization in the polymerization of vinyl chloride compounds. It is used as a bleach agent in the oil and soap industry.

It is used in the preparation of aniline dyes and dyes in the oxidation and electroplating industry, photographic industry and chemical analysis. Food grade is used as wheat modifier and brewer's yeast antifungal agent. It can also be used as an etching agent for metals.

It is stored in a ventilated and dry warehouse, and it is forbidden to mix with flammable, reducing and organic matter.

Ammonium persulfate is obtained by electrolysis of a mixed solution of ammonium sulfate and sulfuric acid.

Appearance and properties: colorless monoclinic crystals, sometimes slightly light green, deliquescent.

Melting point ( ) 120 (decomposition).

Boiling point ( ) decomposition.

Relative density (water = 1):

Relative vapor density (air = 1):

Solubility: Soluble in water, hydrolysis occurs, the chemical equation is: (NH4)2S2O8+2H2O=(reversible)=2NH4HSO4+H2O2 ion equation:

NH4)2S2O8=2NH4++ S2O82- ,S2O82- +2H2O=(reversible)=2HSO4- +H2O2,HSO4-=(reversible)=H+ +SO42- (so in addition to a large number of ammonium ions and perdisulfate ions in the ammonium persulfate solution, there are also a small amount of bisulfate ions and sulfate ions, the solution hydrolysis is acidic, and the addition of nitric acid can inhibit the positive progress of the reaction).

Main uses: used as oxidant, bleach, disinfectant, photographic material, analytical reagent, etc.

Resources.

Chinese name of chemical: ammonium persulfate, English name: ammonium persulfate, toxic chemical.

Studies have shown that ammonium persulfate is widely used in the battery industry as an oxidizing agent and bleaching agent; It is also used as an initiator for polymerization, a desizing agent in the fiber industry; It can also be used as a surface treatment agent for metal and semiconductor materials, and an etching agent for printed circuits; It is also widely used in oil layer fracturing for oil exploitation, flour and starch processing industry, oil industry, and in the photographic industry to remove sea waves.

Characters. White crystals or powders. Odorless.

The dried pure product can be stable for several months, and when it is damp, it gradually separates and releases ozone-containing oxygen, and when heated, it decomposes oxygen and becomes ammonium pyrosulfate. Soluble in water, the aqueous solution is acidic, and gradually decomposes at room temperature, quickly separates oxygen at higher temperatures, and forms ammonium bisulfate.

Stockpile. Keep tightly sealed, cool, dry, and stored. Prevent contact with organic matter.

Quality inspection indicators. Water insoluble, %

Heavy metals (in pb), %.

Manganese (mn), %

Iron (Fe), %

Residue on ignition (in terms of sulfate), %

Chloride and chlorate (Cl), %

The clarity test is qualified.

Content [(NH4)2S2O8], %