化学工业应用

Agricultural liming is the application of calcium carbonate (calcite or ground limestone) or calcium-magnesium carbonate (dolomite) to acidic soils to …

The Haber-Bosch process synthesizes ammonia from atmospheric nitrogen and hydrogen gas at high temperature and pressure over an iron catalyst. …

Synthetic pyrethroids are insecticides modeled on pyrethrin, the natural insecticidal compound found in chrysanthemum flowers (Chrysanthemum cinerariifolium). Pyrethroids like permethrin, …

Urea is the world's most widely used solid nitrogen fertilizer, produced by reacting ammonia with carbon dioxide at high temperature …

Biological nitrogen fixation (BNF) by Rhizobium bacteria in symbiosis with legume roots converts atmospheric N2 into plant-available ammonia using the …

Copper sulfate is one of the oldest and most widely used fungicides in agriculture, first applied as Bordeaux mixture (copper …

Phosphate fertilizers are produced by treating phosphate rock (fluorapatite) with sulfuric acid to create single superphosphate (SSP), or with phosphoric …

Glyphosate (N-(phosphonomethyl)glycine) is the most widely used herbicide globally, originally developed and marketed by Monsanto as Roundup. It works by …

Sodium lauryl sulfate (SLS) and sodium laureth sulfate (SLES) are the most widely used synthetic surfactants in personal care products. …

Oxidative permanent hair dye works by an in-situ polymerization reaction inside the hair cortex. Small precursor molecules (p-phenylenediamine and couplers) …

Essential oils for perfumery are extracted from plant materials primarily by steam distillation, a technique refined since the medieval Islamic …

Sodium fluoride (NaF) and sodium monofluorophosphate (MFP, Na₂PO₃F) are the primary fluoride sources in toothpaste, providing the fluoride ions that …

Soap is produced by saponification — the alkaline hydrolysis of triglycerides (fats and oils) with sodium hydroxide (for bar soap) …

Hyaluronic acid (HA) is a naturally occurring glycosaminoglycan polymer produced industrially by Streptococcus zooepidemicus fermentation, replacing the original extraction from …

Retinol (vitamin A alcohol) is synthesized industrially through a multi-step process and is the most scientifically validated anti-aging ingredient in …

Sunscreen UV filters protect skin from ultraviolet radiation that causes sunburn, premature aging, and skin cancer. Two categories exist: organic …

Metal-organic chemical vapor deposition (MOCVD) grows the precisely layered III-V semiconductor crystals (GaN, InGaN, AlGaN) that form the active regions …

Photolithography is the core patterning process in semiconductor fabrication, using light to transfer circuit patterns onto silicon wafers through photoresist …

The Czochralski (CZ) process grows single-crystal silicon ingots by slowly pulling a seed crystal from a melt of ultra-pure polysilicon …

PCB manufacturing uses chemical etching to create conductive copper traces on fiberglass-reinforced epoxy substrates. The subtractive process involves laminating copper …

Optical fiber preforms are manufactured by depositing ultra-pure silica glass layers inside a rotating tube using modified chemical vapor deposition …

Rare earth elements (REEs) are separated from each other using multistage counter-current solvent extraction, exploiting the slight differences in their …

Chemical vapor deposition (CVD) grows thin films of materials on substrates by decomposing gas-phase precursor molecules. The technique is essential …

Lithium-ion battery cathode materials (NMC, LFP, NCA) are produced by high-temperature solid-state synthesis or co-precipitation methods. The cathode is the …

Proton exchange membrane (PEM) electrolysis splits water into hydrogen and oxygen using renewable electricity and a solid polymer electrolyte membrane. …

Lithium is extracted from continental brines (salt flats in Chile, Argentina, Bolivia — the 'Lithium Triangle') by solar evaporation and …

Crystalline silicon solar cells are manufactured through a series of chemical and physical processes that create a p-n junction on …

Anaerobic digestion (AD) converts organic waste (agricultural residues, food waste, sewage sludge, animal manure) into biogas (60% CH₄, 40% CO₂) …

Uranium enrichment increases the concentration of the fissile isotope U-235 from its natural abundance of 0.72% to 3-5% for nuclear …

Proton exchange membrane fuel cells (PEMFCs) convert hydrogen and oxygen directly into electricity and water through electrochemical reactions, achieving 50-60% …

Steam methane reforming (SMR) produces approximately 95% of the world's hydrogen by reacting natural gas with steam over a nickel …

Biodiesel is produced by transesterification of vegetable oils or animal fats with methanol in the presence of an alkaline catalyst, …

Reverse osmosis (RO) desalination forces seawater or brackish water through semi-permeable thin-film composite (TFC) polyamide membranes at high pressure to …

Chemical precipitation is the most widely used method for removing dissolved heavy metals (Cu, Zn, Ni, Cr, Pb, Cd) from …

Water chlorination is the most widely used method for disinfecting municipal drinking water, credited with virtually eliminating waterborne diseases such …

Activated carbon is produced by thermal or chemical activation of carbonaceous materials (coconut shell, coal, wood) to create an extremely …

Flue gas desulfurization (FGD) removes sulfur dioxide from coal-fired power plant exhaust using limestone or lime slurry scrubbing. The wet …

Bioremediation uses naturally occurring or bioaugmented microorganisms to degrade petroleum hydrocarbons in contaminated soil and groundwater. Indigenous bacteria (Pseudomonas, Rhodococcus, …

Ion exchange (IX) is a reversible chemical process where dissolved ions in water are exchanged for similarly charged ions on …

Ozone (O3) treatment is used in drinking water disinfection and advanced oxidation processes (AOPs) to destroy micropollutants including pharmaceuticals, pesticides, …

Lactic acid is produced commercially by fermentation of glucose or sucrose using Lactobacillus species, serving as a food preservative, acidulant, …

Monosodium glutamate (MSG) is produced by aerobic fermentation of Corynebacterium glutamicum on sugar substrates, followed by crystallization of the sodium …

Vitamin C (L-ascorbic acid) is manufactured through the Reichstein process or its modern two-step fermentation variant, converting D-glucose into L-ascorbic …

Sugar refining transforms raw cane or beet sugar into refined white sucrose through a series of dissolution, purification, and recrystallization …

Ethanol fermentation using Saccharomyces cerevisiae is the oldest and most widely practiced biotechnological process. While beverage alcohol (beer, wine, spirits) …

High-fructose corn syrup (HFCS) is produced by enzymatic isomerization of glucose derived from corn starch. The three-enzyme process converts cornstarch …

Food-grade phosphoric acid is produced by the thermal (furnace) process, burning elemental phosphorus in air and absorbing the resulting P₂O₅ …

Citric acid is the most produced organic acid globally, manufactured primarily through submerged fermentation of Aspergillus niger on sugar-based substrates. …

Kevlar is a para-aramid fiber produced by the polycondensation of p-phenylenediamine and terephthaloyl chloride in solution, followed by dry-jet wet …

Epoxy resins are produced by the reaction of bisphenol A (BPA) with epichlorohydrin (ECH) to form diglycidyl ether of bisphenol …

Glass fiber reinforced polymer (GFRP) composites are manufactured by combining continuous or chopped glass fibers with thermoset or thermoplastic resin …

Silicones (polysiloxanes) are produced through the Rochow-Muller direct process, reacting silicon metal with methyl chloride to form methylchlorosilanes, which are …

Vulcanization is the chemical cross-linking of rubber polymer chains with sulfur, transforming soft, sticky raw rubber into a durable, elastic …

Nylon 6,6 is produced by the polycondensation of hexamethylenediamine and adipic acid, forming one of the most important engineering thermoplastics …

Carbon fiber is produced by the controlled thermal conversion of polyacrylonitrile (PAN) precursor fiber through oxidation, carbonization, and graphitization steps. …

Polyethylene (PE) is the most produced plastic globally, manufactured through catalytic polymerization of ethylene. Three major grades exist: HDPE (high …

Titanium metal is produced by the Kroll process — reduction of titanium tetrachloride (TiCl₄) with magnesium in an inert atmosphere. …

Gold cyanidation dissolves gold from crushed ore using dilute sodium cyanide solution, a process patented by MacArthur and Forrest in …

Stainless steel is produced by melting scrap steel and ferroalloys in an electric arc furnace (EAF), followed by refining in …

Electroplating deposits a thin layer of metal onto a conductive substrate using electrolysis, providing corrosion protection, wear resistance, and decorative …

Zinc is the fourth most consumed metal globally, primarily produced by the roast-leach-electrowin (RLE) process from zinc sulfide (sphalerite) ore. …

Aluminum is produced by electrolysis of alumina (Al₂O₃) dissolved in molten cryolite (Na₃AlF₆) at 960 degrees C — the Hall-Heroult …

The blast furnace reduces iron ore (hematite, Fe₂O₃) to pig iron using coke as both fuel and reducing agent. This …

Copper electrorefining purifies blister copper (99% Cu) to cathode copper (99.99% Cu) by electrolysis in acidic copper sulfate solution. Impure …

Catalytic reforming converts low-octane naphtha into high-octane reformate for gasoline blending and produces hydrogen as a valuable byproduct. The process …

Fractional distillation is the primary process for refining crude oil into usable products. Crude oil is heated to approximately 400 …

Polyethylene terephthalate (PET) is produced by polycondensation of ethylene glycol with terephthalic acid (PTA). PET is the world's most recycled …

Polyethylene (PE) is the most produced plastic globally, manufactured through the catalytic polymerization of ethylene. Three major grades are produced: …

Steam cracking is the primary industrial process for producing ethylene, the world's most produced organic chemical. Hydrocarbon feedstocks (ethane, naphtha, …

Fischer-Tropsch (FT) synthesis converts synthesis gas (CO + H₂) into liquid hydrocarbons, producing synthetic fuels and waxes from coal, natural …

Ethylene oxide (EO) is produced by the direct catalytic oxidation of ethylene over silver catalysts, making it one of the …

Polypropylene (PP) is the second most produced plastic globally, valued for its excellent chemical resistance, low density, and versatile mechanical …

Penicillin G (benzylpenicillin) is produced by submerged aerobic fermentation of Penicillium chrysogenum in large-scale stirred-tank bioreactors. Since Alexander Fleming's 1928 …

Omeprazole is the first proton pump inhibitor (PPI) to reach the market and remains one of the most prescribed medications …

Ibuprofen is one of the most consumed non-steroidal anti-inflammatory drugs (NSAIDs) worldwide. The BHC Company (now BASF) developed a revolutionary …

Paracetamol (acetaminophen) is the most widely used analgesic and antipyretic drug globally, with annual production exceeding 145,000 tons. The industrial …

Aspirin (acetylsalicylic acid) is manufactured through the acetylation of salicylic acid with acetic anhydride. First synthesized by Felix Hoffmann at …

Metformin is the most widely prescribed oral antidiabetic drug and the first-line treatment for type 2 diabetes globally. The synthesis …

Recombinant human insulin is produced using genetically engineered Escherichia coli or Saccharomyces cerevisiae that express the human insulin gene. This …

Amoxicillin is a broad-spectrum semi-synthetic penicillin and the most prescribed antibiotic globally. It is produced by enzymatic coupling of 6-aminopenicillanic …