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Hunan Hengguang Heangyang Hengrong Hengyang Fenglian

Sulfuric acid

Molecular formula: H2SO4
Molecular weight: 98.0

Quality standards:GB/T534-2014  Proportion:1.84(98%:20℃)

Physical propertiesIt is a colourless, transparent and oily liquid. The boiling point and crystallization temperature vary with the content of sulphuric acid. When the content is 98%, the crystallization temperature is 0.1 ℃, and the boiling point is 332.4 ℃ (0.1 MPa). Sulfuric acid is soluble in water and emits a lot of heat. Concentrated sulphuric acid has strong water absorption and can be used as a desiccant.


Chemical Properties: Sulfuric acid is a strong acid, which can neutralize with alkali, react with metal oxides, and react with many metals. Concentrated sulfuric acid has strong dehydration, and has a strong destructive effect on organic substances and human skin.



Main Applications: Sulfuric acid is widely used in chemical fertilizers, synthetic fibers, coatings, detergents, refrigerants, feed additives and petroleum, steel, pharmaceutical and chemical industries. Packaging and transportation: Concentrated sulphuric acid has little corrosiveness to iron equipment, so it is shipped in iron tanker or barrel. Dilute sulphuric acid corrodes metal seriously, so it is packed in rubber-lined steel or plastic containers.


Sulfamic Acid


Product Name:  Sulfamic Acid

Molecular formulaNH2SO3H

Molecular weight97.09


Quality Standards: HG/T2527-2011


Physical properties: It is a colorless or white crystal, soluble in water, slightly soluble in ethanol and methanol, slightly soluble in acetone, insoluble in ether. It is gradually decomposed into ammonium bisulfate in aqueous solution. The solubility in water is 146.8 g/l (20 ), and the melting point is 215-225  .



Chemical propertiesIt is a colorless orthorhombic or white crystal. Odorless. Soluble in water, liquid ammonia, slightly soluble in methanol, insoluble in ethanol, ether organic solvents and carbon disulfide, liquid sulfite. Aqueous solutions are highly ionized. Strong acid. The salt is soluble in water (except alkaline mercury salts). Its aqueous solution is hydrolyzed to ammonium sulfate when boiling.



Main uses:
1. Major raw materials for the production of sweeteners
2. The Best Effective Dual Ion Cleaner
3. Pulp bleaching agent
4. Vulcanizing agents, catalysts, disinfectants, flame retardants
5. Manufacture of dyes and pigments
6. Electroplating additives, etc.
7. Organic synthetic sulfonating agents
8. Herbicides and withering inhibitors
9. Adhesive accelerators for resins


Packaging and storage: inner plastic and outer woven, sealed packaging, 25 kg/bag, stored in a dry and ventilated place. Separate storage and transportation with oxidants and alkalis. Attention should be paid to individual protection and direct physical contact should be strictly prohibited. Eat by mistake, gargle with water, drink milk or egg white.



CalciumAluminum Hydrotalcite


Product introduction

CalciumAluminum Hydrotalcite is also called hydrotalcite.Hydrocalumite is an anionic clay and belongs to layered bimetallic hydroxides (LDHs). Because of its special structure, composition and controllability, it has some special properties, such as ion exchange resin, zeolite-like selective adsorption and catalysis, heat resistance, radiation resistance and acid-alkali resistance. Therefore, it has become a kind of flame retardant, adsorption, ion exchange and catalysis, as well as light and electricity. New functional materials with great potential and attractive prospects in magnetic and other fields. Calcium-aluminate hydrotalcite has obvious advantages over magnesium-alumina hydrotalcite. From the structure analysis, the compound contains calcium, which has better long-term thermal stability than magnesium. There are also a large number of hydroxyl radicals in bauxite. These hydroxyl radicals can neutralize and absorb the hydrogen chloride produced by the degradation of PVC, thus playing a long-term thermal stabilizer effect. Therefore, as the main thermal stability component of PVC resin, bauxite has better application prospects than traditional hydrotalcite.


Main uses:

1. Thermal stabilizer: This compound contains calcium element, which has better long-term thermal stability than magnesium element, and its initial coloring line is lower than magnesium element. There are a lot of hydroxides in bauxite, which can neutralize and absorb hydrogen chloride produced by degradation of PVC, thus playing a long-term thermal stabilizer effect. Therefore, as the main thermal stability component of PVC resin, it has good application prospects.
2. Flame Retardant and Smoke Suppressor: LDHs absorbs a lot of heat during thermal decomposition, which can reduce the temperature of material surface; water and carbon dioxide gas released from decomposition can dilute and block flammable gas; the decomposed product is alkaline porous material with large specific surface, which can absorb harmful gases, especially acidic gases. At the same time, it combines with carbonized products on plastic surface during combustion to form protective film. Heat-breaking energy and oxygen immersion.
3. Ultraviolet absorption and barrier: LDHs show excellent ultraviolet absorption and scattering effect after calcination. Surface reaction can further enhance its ultraviolet absorption ability, so that it has both physical and chemical effects. A large number of practices have proved that as a light stabilizer, the effect is obviously better than that of traditional materials. It can be widely used in plastics, rubber, fibers, cosmetics, coatings, paints and other fields.



Sodium Sulfite

Molecular formulaNaSO3



Molecular weight126.04(252.04)



Appearance and Character: White, monoclinic crystal or powder


Product overview:Sodium sulfite (anhydrous), common sulfite, colorless, monoclinic crystal or powder. It can irritate eyes, skin and mucosa and pollute water sources. Toxic sulfide fumes are produced by high thermal decomposition. In industry, it is mainly used to produce cellulose sulfite, sodium thiosulfate, organic chemicals, bleached fabrics, etc. It is also used as reducing agent, preservative, dechlorinating agent, etc.



Chemical propertySodium sulfite is easily weathered in air and oxidized to sodium sulfate. The crystalline water is lost at 150 ℃.Reheating melts into a mixture of sodium sulfide and sodium sulfate. The density of anhydrous matter is 2.633. It oxidizes much slower than hydrate and remains unchanged in dry air. Sodium sulfide and sodium sulfate are produced by thermal decomposition, sulfur dioxide is released by decomposition into corresponding salts when  it in contact with strong acids. Sodium sulfite has strong reducibility. It can reduce copper ions to cuprous ions (sulfite can form complex with cuprous ions and is stable), and it can also reduce weak oxidants such as phosphotungstic acid. Sodium sulfite and its hydrogen salts can be used in the laboratory to remove peroxides of ether substances (adding a small amount of water, slightly heat stirring reaction, then separating the liquid, drying the ether layer with quicklime, for some less demanding reactions). It can be neutralized with hydrogen sulfide.



Main Application:

1. Used for the determination of tellurium and niobium in trace analysis and the preparation of developer solution, and as reducing agent.
2. Used in artificial fibre stabilizer, fabric bleaching agent, photographic developer, dyeing and bleaching deoxidizer, perfume and dye reductant, paper lignin remover, etc.
3. Used as general analytical reagent and photoresistor material
4. Reductive bleaching agent has bleaching effect on food and strong inhibitory effect on oxidase in vegetable food. Our country stipulates that it can be used for candied fruit with a maximum usage of 2.0g/kg. It can also be used for concentrated juice of glucose, liquid glucose, sugar, ice sugar, bait sugar, candy, bamboo shoots, mushrooms, grape and blackcurrant, etc.
5. Printing and dyeing industry, as deoxidizer and bleaching agent, is used in the boiling of various cotton fabrics, which can prevent the local oxidation of cotton fabrics and affect the strength of the fibers, and improve the whiteness of the boiled products. The photosensitive industry is used as a developer. Organic industry is used as reductant in the production of m-phenylenediamine, 2,5-dichloropyrazolone, anthraquinone-1-sulfonic acid, 1-aminoanthraquinone, sodium aminosalicylate and so on, which can prevent the oxidation of semi-finished products in the reaction process. The paper industry is used as lignin remover. The textile industry is used as a stabilizer for man-made fibers. The electronics industry is used to make photoresistors. Water treatment industry is used to treat electroplating wastewater and drinking water.
6. Food industry is used as bleaching agent, preservative, loosening agent and antioxidant. It is also used in pharmaceutical synthesis. Used as a reducing agent in the production of dehydrated vegetables.
7. It is used to produce cellulose sulfite, sodium thiosulfate, organic chemicals, bleached fabrics and so on. It is also used as reducing agent, preservative and dechlorinating agent.




Sodium Pyrosulfite

Molecular formulaNa2S205


Product Overview: Sodium Pyrosulfite,Its alias is heavy sulfur oxygen, also known as sodium sulfite, or Na2S205, sodium bisulfite molecule formula, molecular weight 190.1 for white or yellowish crystalline powder, relative density of 1.4. Soluble in water and glycerol, slightly soluble in ethanol, insoluble in benzene. Its solubility in water increases with the increase of temperature. It is 54 g/100 mL water at 20 ~C, 81.7 g/100 mL water at 100 ~C. The water solution is acidic. It dissolves in water and forms stable sodium ammonium sulfite. It is easy to decompose under moisture. It is easy to oxidize slowly in exposed air and release SO2. Finally, oxygen is absorbed and oxidized into Na2SO4 in contact with strong acid, SO2 is released, and corresponding salts are formed and dissolved with caustic soda or soda. Sodium sulfite is formed in liquid reaction, and adduct can be formed with aldehydes. Sodium pyrosulfite begins to decompose when heated to 150 degrees, and intake is toxic.


Purpose:
1. The pharmaceutical industry is used to produce chloroform, phenylpropyl sulfone and benzaldehyde.
2. Rubber industry is used as coagulant.
3. Printing and dyeing industry is used as dechlorinating agent and cotton cooker after cotton bleaching.
4. Leather processing in the leather industry can make the leather soft, plump and tough, with waterproof, bending resistance, wear resistance and other properties.
5. Chemical industry is used to produce hydroxyl vanillin and hydroxylamine hydrochloride.
6. Photosensitive industry is used as developer.
7. Food industry as bleaching agent, preservative, loosening agent, antioxidant, color preservative and preservative









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