• Oxidizing Chemical
  • Ammonium Nitrate
  • Hydrogen Peroxide
  • Nitric Acid

Home > News

Application Area of Sulfuric Acid

Mar. 23, 2021

Here is the application field of sulfuric acid shared by the Sulfuric Acid Supplier, I hope it will be helpful to you

Industrial applications

Metallurgy and Petroleum Industry

Used in the metallurgical industry and metal processing In the metallurgical industry sector, especially the production process of non-ferrous metals requires the use of sulfuric acid. For example, when refining copper, zinc, cadmium, and nickel by electrolysis, the electrolyte needs to use sulfuric acid. The refining of some precious metals also requires sulfuric acid to dissolve and remove other metals. Before cold rolling, cold drawing and stamping in the steel industry, sulfuric acid must be used to remove iron oxide on the surface of steel. In rolling thin plates, cold drawn seamless steel pipes and other high-quality steel products, they must be washed with sulfuric acid every time they are rolled. In addition, seam steel pipes, thin iron sheets, iron wires, etc. must be pickled with sulfuric acid before galvanizing. In certain metal machining processes, such as nickel plating, chrome plating and other metal parts, sulfuric acid is also needed to clean the surface of rust. In the ferrous metallurgical business sector, the steel that needs to be pickled generally accounts for about 5% to 6% of the total steel output, and the pickling of each ton of steel consumes about 98% of sulfuric acid and 30-50kg.

Used in the production process of petroleum products such as gasoline and lubricating oil in the petroleum industry, concentrated sulfuric acid refining is required to remove sulfur-containing compounds and unsaturated hydrocarbons. Each ton of crude oil refining requires about 24kg of sulfuric acid, and each ton of diesel refining requires about 31kg of sulfuric acid. The preparation of activated clay used in the petroleum industry also consumes a lot of sulfuric acid.

It can be used as hard water softener, ion exchange regeneration agent, pH adjuster, oxidant and detergent, etc. It can also be used in the manufacture of fertilizers, pesticides, dyes, pigments, plastics, chemical fibers, explosives and various sulfates. It is widely used in petroleum refining, non-ferrous metal smelting, steel pickling treatment, tanning process, coking industry, light textile industry, national defense and military industry. Strong acid cleaning corrosive agent. It is mainly used for silicon wafer cleaning in the integrated circuit manufacturing process.

Sulfuric Acid

Sulfuric Acid

Solve the needs of the people

For the production of chemical fibers, the viscose yarn is familiar to the people. It needs to use a mixture of Sulfuric Acid, zinc sulfate, and sodium sulfate as the coagulation bath for viscose spinning. For every 1t of viscose fiber, 1.2~1.5t of sulfuric acid is needed. For every 1t of nylon staple fiber, 230kg of 98% sulfuric acid is consumed. For every 1t of capron monomer, 1.6t of 20% oleum is needed. In addition, a considerable amount of sulfuric acid is also used in the production of chemical fibers such as nylon, acetate fiber, and polyacrylonitrile fiber.

The use of polymer compounds other than chemical fibers to produce plastics and other polymer compounds is playing an increasingly important role in the national economy. For every 1t of epoxy resin, 2.68t of sulfuric acid is needed. Polytetrafluoroethylene known as the "Plastic King". For every 1t of production, 1.32t of sulfuric acid is needed; production of silicone gum, silicone oil, styrene butadiene rubber and nitrile rubber, etc. , Also have to use sulfuric acid.

There is almost no dye used in the dye industry to prepare without the use of sulfuric acid. The preparation of azo dye intermediates requires a sulfonation reaction, and the preparation of aniline dye intermediates requires a nitration reaction, both of which require the use of a large amount of concentrated sulfuric acid or oleum. Therefore, some dye plants have sulfuric acid workshops to meet the needs.

Fuming sulfuric acid and concentrated sulfuric acid are used in the production of daily necessities to produce synthetic detergents. Plasticizers for plastics and nitrocellulose, the raw material for celluloid products, all require sulfuric acid to prepare. The manufacture of cellophane and parchment also requires the use of sulfuric acid. In addition, the textile printing and dyeing industry, enamel industry, hardware industry, soap industry, artificial fragrance industry and other production sectors also need to use sulfuric acid.

It is used in the sulfonation reaction in the preparation process of sulfa drugs in the pharmaceutical industry, and the nitration reaction in the preparation process of the powerful bactericide nitrofural, all need sulfuric acid. In addition, the preparation of many antibiotics, commonly used drugs such as aspirin, caffeine, vitamin B2, vitamin B12 and vitamin C, certain hormones, isoniazid, mercury bromide, saccharin, etc., do not need sulfuric acid.

Consolidate national defense

The development of the sulfuric acid industry in some countries was once closely linked to the production of military explosives. Regardless of military explosives (propellants, explosives) or industrial explosives, most of them are mainly composed of nitro compounds or nitrate esters. The main ones are nitrocellulose, trinitrotoluene (TNT), nitroglycerin, picric acid and so on. Although the preparation of these compounds relies on nitric acid, concentrated sulfuric acid or oleum must be used at the same time.

Atomic Energy Industry and Rocket Technology

The production of nuclear fuel used in nuclear reactors, the preparation of alloy materials such as titanium and aluminum used in reactors, and the titanium alloys used in the manufacture of rockets, supersonic jets and artificial satellites are all directly or indirectly related to sulfuric acid. The process of preparing borane from borax requires a large amount of sulfuric acid. Borane derivatives are the most important high-energy fuel. Borane is also used as a raw material for preparing uranium borohydride to separate uranium-235. This shows that sulfuric acid has a close relationship with the national defense industry and cutting-edge science and technology.

Agricultural use

Soil improvement

In agricultural production, sulfuric acid is increasingly used to improve calcareous soils with high pH values. In the past 20 years, the production of urea-sulfuric acid fertilizer has increased substantially and it has been widely used in the soil of the western states of the United States. Injecting sulfuric acid into dairy lakes and changing the pH of the lake water can solve some of the air and water quality problems caused by the process of raising livestock. When sulfuric acid is applied to agricultural soil and water, its main function is to dissolve calcium and magnesium carbonate and bicarbonate. . These calcium and magnesium salts then replace the exchangeable sodium salt, which is then removed by leaching with water. When carbonate and bicarbonate are decomposed, sulfuric acid reacts with more inert substances to release plant nutrients such as phosphorus and iron. Simply lowering the pH of the soil can cause changes in the solubility of many elements, increasing their effectiveness on plants. Applying sulfuric acid to calcareous soils with high pH values can make plants more robust and increase yields.

Fertilizer production

The production of ammonium sulfate and superphosphate for fertilizer production consumes a lot of sulfuric acid.

Many pesticides used in the production of pesticides use sulfuric acid as raw materials. Copper sulfate and zinc sulfate can be used as plant fungicides, thallium sulfate can be used as rodenticide, and ferrous sulfate and copper sulfate can be used as herbicides. The most common pesticides, such as 1059 emulsion and 1605 emulsion, require sulfuric acid in the production.

Daily household use

Concentrated sulfuric acid is contained in most of the acid chemical drainage supplies around the world. This type of canal supplies is the same as alkaline canal supplies, which can dissolve the oil and food residues that have been blocked in the canal. However, since concentrated sulfuric acid will have a high exothermic reaction with water, it is recommended to keep the channel dry as much as possible before use, and slowly pour in the relevant chemicals, and wear gloves.

The company also provides Nitric Acid and hydrochloric acid, please feel free to contact us if necessary