#industrial chemistry

• Alum — A double hydrated sulfate of aluminum and an alkali metal (usually potassium), with the general chemical formula KAl(SO4)2·12H2O, crystallizing in the cubic system; a structural substance with potent astringent, hemostatic, and antiseptic properties, traditionally known as alum. In industry, it is widely used as a mordant in dyeing, a tanning agent in leather processing, a clarifying agent for water purification, and in cosmetics as a natural antiperspirant due to its capacity to contract tissues and inhibit bacterial proliferation.
• Alkali — A generic name given to the hydroxides of alkali metals (such as sodium, potassium) and alkaline earth metals, as well as ammonium hydroxide. In a traditional chemical sense, it refers to any water-soluble base capable of neutralizing acids, turning red litmus paper blue, and forming salts through combination reactions.
• Alkyd resin — A technical or commercial designation used for a range of synthetic alkyd resins widely utilized in the chemical industry for manufacturing protective lacquers, enamels, and paints. These fatty acid-modified polyester resins provide finishes with high structural durability, rapid drying times, and excellent resistance to weathering and mechanical factors.
• Alloprene — A commercial or technical designation attributed to a type of chlorinated synthetic rubber, obtained through the controlled chlorination of natural rubber or polyisoprene. This macromolecular compound stands out structurally due to its exceptional resistance to acids, oxidizing alkaline substances, and aggressive climatic factors, utilized on an industrial scale as a binder or core component in manufacturing anti-corrosive paints, special adhesives, and chemical protective coatings.
• Amination — A chemical process by which an amino group is introduced into the molecule of an organic compound, typically through reaction with ammonia or other aminating agents. This structural reaction is essential in the industrial synthesis of numerous dyes, medications, plastics, and in biochemistry pathways for amino acid formation.
• Aminolac — A commercial or technical name attributed to a synthetic resin obtained through the polycondensation of urea or melamine with formaldehyde. Due to its rigid and resistant macromolecular network, this structural compound is utilized as a basic raw material in manufacturing industrial varnishes, enamels, and protective film-forming finishes for wood or metallic surfaces.
• Aminoplast — A generic name given to synthetic plastic materials, specifically thermosetting resins, obtained through the polycondensation of a nitrogenous base (such as urea, melamine, or thiourea) with an aldehyde, particularly formaldehyde. Due to their three-dimensional cross-linked structure, these products exhibit high hardness, thermal resistance, and excellent insulating properties, being widely used in manufacturing molded objects, electrical insulators, and laminates.
• Ammonal — An industrial and military explosive substance composed of a homogeneous mixture of ammonium nitrate, aluminum powder, and trinitrotoluene (TNT) or charcoal. The aluminum functions as a powerful thermal agent that considerably increases the temperature and blast of the explosion, making amonal ideal for large-scale mining operations or for charging heavy projectiles.
• Ammoniation — The act of ammoniating and its result; a technological or industrial process through which gaseous or liquid ammonia is introduced into a chemical environment, solutions, or a solid substrate, aiming to modify its acidity, structural reactivity, or nitrogen content. In applied ecology, the term is sometimes used as a partial synonym for ammonification, describing the initial release phase of ammonia from residues.
• Anion exchanger — A synthetic or natural macromolecular ion exchanger capable of binding and exchanging anions from aqueous solutions. This type of ion-exchange resin contains functional groups with a basic character fixed onto an insoluble polymeric matrix, widely utilized in industrial processes for demineralization, softening, and advanced purification of wastewater or drinking water.
• Anticorrosive — An obsolete spelling variant, rarely used today, for the term 'anticoroziv' (anticorrosive); a chemical substance, paint, primer, or structural treatment applied to metallic surfaces to protect them against degradation, oxidation, and chemical attack caused by environmental factors.
• Anticorrosive — Protecting metals against corrosion, preventing oxidation, rusting, or chemical degradation caused by atmospheric or acidic agents; a chemical substance (paint, primer, oil, additive) or technological treatment (galvanizing, anodization) structurally formulated to preserve the integrity of metallic components.
• Pickling inhibitor — A chemical substance, mixture, or compound added to an acid pickling solution to slow down, limit, or prevent corrosive attack on the base metal, acting exclusively on surface oxides and impurities; a pickling inhibitor. As an adjective, it describes a product, treatment, or effect that protects the metallic structure during industrial chemical cleaning processes.
• Anti-knock agent — A chemical substance or additive added to fuels to increase their resistance to premature auto-ignition and to prevent the phenomenon of detonation in internal combustion engines; a compound that regulates the burning rate of the fuel mixture. As an adjective, it describes a fuel, mixture, or structural effect capable of ensuring a smooth and efficient engine operation, eliminating parasitic metallic knocks.
• Antiflocculant — Preventing, blocking, or delaying the flocculation process (the aggregation of fine particles suspended in a liquid into gelatinous flakes); a chemical dispersing agent used to maintain the homogeneous stability of colloidal suspensions. Antiflocculant agents increase electrostatic repulsion to prevent premature sedimentation.
• Antioxidant — A chemical substance or molecular compound utilized to prevent, block, or slow down degradation and structural spoilage processes caused directly by the chemical action of molecular oxygen; a term used in engineering and the food industry as a functional synonym for autoxidation inhibitors of fats, oils, or polymers.
• Antravon — A commercial or technical name attributed to an organic compound derived from anthracene, historically used as an industrial intermediate in the manufacture of highly stable synthetic dyes or certain chemical impregnating agents for textile materials. This term refers to a complex aromatic structure optimized to withstand thermal degradation and the action of oxidants in industrial technological processes.
• Fabric sizing — A final technological finishing operation for textile materials, consisting of applying a thin layer of sizing agent or starch; it also defines the chemical colloidal mixture used for this purpose or the resulting protective film on the fabric surface. This structural process serves to provide the cloth with controlled stiffness, a pleasant hand, luster, waterproofness, or wrinkle resistance according to commercial standards.
• Aracetin adhesive — A historical commercial name used in Romania for a specific assortment of industrial adhesive based on synthetic resins or vinyl polymers, related in chemical formulation to standard aracet, but adapted for specific uses in the wood industry, finishes, and bookbinding. The term remained in the technical lexicon as a marker for water-soluble bonding solutions with high adhesion on porous surfaces.
• Arsenate — A salt or ester of arsenic acid, obtained by combining it with a base or an organic radical. In nature, arsenates form a complex class of minerals, often brightly colored but highly toxic, historically used in manufacturing insecticides, agricultural pesticides, and certain industrial pigments.