China Zibo Special Chemicals Production Co., Ltd. Company News

　　Anti-wear(AW)agents are crucial additives in engine oil,designed to protect critical metal components,such as the camshaft and valve train,under boundary and mixed lubrication conditions.These conditions occur during cold starts or high-load/low-speed operations when the hydrodynamic oil film is too thin to completely separate the surfaces.　　The primary function of an AW agent is to form a sacrificial protective layer on the metal surfaces.When localized heat and pressure from metal-to-metal contact are high,the additive chemically reacts with the metal.This reaction creates a durable,yet softer,film known as a tribofilm.　　The most widely used AW additive is Zinc Dialkyldithiophosphate(ZDDP),an organo-metallic compound containing zinc and phosphorus.Upon activation by heat and stress,ZDDP decomposes to form a glassy iron and zinc polyphosphate film.This film prevents direct contact,minimizing abrasive wear,scuffing,and seizing,and also acts as a powerful antioxidant to prolong oil life.　　Other anti-wear and friction-reducing compounds include Molybdenum compounds(like Molybdenum Dithiocarbamate),which form a low-friction solid film,and various ashless phosphorus-based compounds.Careful formulation ensures optimal wear protection while balancing modern engine oil requirements,such as compatibility with catalytic converters.

　　Decarburization refers to the loss of carbon from the surface layer of an alloy,typically steel,when it is heated to high temperatures(generally above 700℃)in an atmosphere containing oxygen or hydrogen.This phenomenon is categorized based on its extent and cause.　　1.Extent-Based Decarburization　　In metallurgical testing,decarburization is classified by the degree of carbon loss in the surface layer:　　Complete Decarburization(Type 1):This occurs when the carbon is completely removed,resulting in a measurable layer of pure ferrite(carbon-free iron)at the surface.　　Partial Decarburization(Type 2&3):This describes the transition layer where the carbon content gradually increases from the surface to the core’s original concentration.The loss is greater than 50%(Type 2)or less than 50%(Type 3)without a completely carbon-free layer.　　2.Intent-Based Decarburization　　From a process standpoint,decarburization is classified by whether it is an intended or unintended outcome:　　Incidental/Undesirable Decarburization:This is the most common and problematic type,occurring unintentionally during high-temperature manufacturing processes like forging,hot rolling,or heat treatment.It severely reduces the surface hardness,wear resistance,and fatigue strength of critical components like fasteners and gears.　　Intentional Decarburization:This is a controlled process used to achieve specific material properties.A prime example is the production of electrical steel(silicon steel),where low carbon content is required to minimize magnetic core losses,thus enhancing electrical efficiency.　　Preventing incidental decarburization usually involves using controlled atmospheres(inert gases or vacuum)during heating.

　　Using a desulfurizer involves employing a specific chemical or physical process to remove sulfur compounds,typically hydrogen sulfide(H2S)or sulfur dioxide(SO2),from a gas or liquid stream.The exact method depends entirely on the application(e.g.,natural gas,refinery products,or power plant flue gas)and the desulfurization agent used.　　1.Wet Scrubbing　　For large-scale flue gas desulfurization(FGD),wet scrubbing is common.The flue gas passes into a tower where it is contacted with a fine spray or slurry of an alkaline sorbent,most often limestone or lime(CaCO3 or Ca(OH)2).The sorbent reacts chemically with the SO2 to form a solid byproduct like calcium sulfite/sulfate(gypsum),which is then collected and removed.　　2.Amine/Chemical Absorption　　In natural gas and refinery processes(gas sweetening),a liquid desulfurizer like a tertiary amine(e.g.,MDEA)is circulated through an absorption column.The gas stream flows up,countercurrent to the amine solution,which selectively absorbs the H2S and CO2.The resulting"rich"amine is then sent to a separate regeneration column,where heat is applied to release the acid gases,allowing the"lean"amine to be recycled.　　3.Dry/Solid Adsorption　　For smaller scale or fine purification,dry desulfurizers like iron oxide(Fe2O3)pellets or activated carbon are used.The gas stream simply passes through a packed bed of this solid material.The sulfur compounds are chemically or physically adsorbed onto the surface of the media.Once saturated,the solid desulfurizer must be either replaced or regenerated,often through steam stripping or an oxidation step.　　These processes are critical for meeting environmental regulations and protecting downstream equipment from corrosion.

　　Anti-wear(AW)agents are essential chemical additives in lubricants,designed to protect contacting metal surfaces under boundary and mixed lubrication conditions.These regimes occur when the lubricant film is too thin to completely separate the moving parts,leading to metal-to-metal contact and potential damage.　　The primary principle of AW agents is to form a sacrificial protective film on the metal surface.When the localized heat and pressure from contact(known as"tribological stress")become high,the AW additives are chemically activated.They react with the metal to create a durable,yet softer,film—a tribofilm.　　A common example is Zinc Dialkyldithiophosphate(ZDDP),which reacts with the metal surface to form a glass-like polyphosphate film.This thin,protective layer(typically 50-150 nm thick)acts as a physical barrier.Instead of the hard metal surfaces wearing each other down,the softer tribofilm absorbs the shear stress,minimizing abrasive and adhesive wear.　　By providing this sacrificial coating,AW agents reduce friction,prevent component seizure,and significantly extend the lifespan of engines,gears,and hydraulic systems.

　　N-Methyldiethanolamine(MDEA)is a tertiary amine with the chemical formula CH3N(CH2CH2OH)2.It is a versatile chemical compound known for its unique properties,particularly its high selectivity toward hydrogen sulfide(H2S)and carbon dioxide(CO2)in gas sweetening processes.　　1.Gas SweeteningThe primary and most significant application of MDEA is in gas sweetening—the removal of acid gases(H2S and CO2)from natural gas,refinery gases,and synthesis gas.MDEA is favored over primary and secondary amines due to its lower energy requirement for regeneration and its superior selectivity,which allows for the preferential removal of the more toxic H2S.　　2.Polyurethane Catalysis　　MDEA also serves as a key catalyst in the production of polyurethane foams and elastomers.It specifically promotes the isocyanate-water reaction,influencing the foaming and curing process to achieve desired physical properties in the final product.　　3.Specialty Chemicals　　Furthermore,MDEA is used as an intermediate in the synthesis of other specialty chemicals.These derivatives find use in applications such as corrosion inhibitors,textile processing agents,and pharmaceutical compounds.Its stable nature and high reactivity make it a valuable building block in the chemical industry.

Diesel Anti-Wear Agent is a common lubricant additive. Its main function is to reduce friction and wear inside the engine, thereby extending the service life of the engine. Diesel Anti-Wear Agent can form a protective film on the metal surface, effectively preventing direct contact between metal parts and reducing wear and corrosion. The main components of Diesel Anti-Wear Agent include organic protective agents, antioxidants, flame retardants and detergents. These components can work stably under the high temperature and high pressure engine working environment, and react chemically with the metal surface to form a coating. This coating can not only reduce friction and wear, but also stabilize the viscosity of the lubricant, reduce the friction coefficient and increase the strength of the oil film. The use of Diesel Anti-Wear Agent can bring many benefits. First, it can significantly reduce the wear inside the engine and extend the service life of the engine. Secondly, Diesel Anti-Wear Agent can also improve the performance and efficiency of the engine, reduce fuel consumption and emissions. In addition, diesel anti-wear agent can also clean carbon deposits and sediments inside the engine, keep the fuel injectors and oil circuits clean, and reduce the number and cost of fuel system maintenance. In summary, Diesel Anti-Wear Agent plays an important role in improving engine performance and extending service life. Correct selection and use of Diesel Anti-Wear Agent is one of the important measures to protect the engine, improve vehicle operating efficiency, and extend vehicle service life.

Diesel Anti-Wear Agent is a special additive that can improve the anti-wear performance of diesel engine oil. When the diesel engine is working, Diesel Anti-Wear Agent can reduce friction between metals, reduce wear and debris, and extend the service life of the diesel engine. The following is the production process of Diesel Anti-Wear Agent. 1. Raw material preparation: The raw materials required for the manufacture of Diesel Anti-Wear Agent mainly include ammonium molybdate, sodium molybdate, boric acid, organic amines, solvents, etc. These raw materials need to be quality tested to ensure that they meet relevant technical standards. 2. Diesel Anti-Wear Agent formula design: Design a suitable formula according to different requirements. Calculate the amount of each component based on the composition ratio and quality of each raw material in the formula. 3. Raw material processing: Add ammonium molybdate and sodium molybdate to the solvent according to the ratio in the formula, then heat and stir to fully dissolve them. Then add other raw materials such as boric acid and organic amines, and continue to stir and mix. 4. Filtration: Filter out impurities and insoluble solids generated during the production process through filtering equipment to improve the purity of the product. 5. Drying: Evaporate the filtered solution to dehydrate it and reach a certain dryness. This can be done by heating, low-temperature concentration, etc. 6. Packaging: Pour the dried Diesel Anti-Wear Agent into the packaging container and seal it tightly. At the same time, indicate the product name, specifications, manufacturer and other information. 7. Quality inspection: Perform quality inspection on the Diesel Anti-Wear Agent produced. Including appearance inspection, heavy metal content detection, pH value determination, solubility test, etc., to ensure that the quality of the product meets the requirements. 8. Storage and sales: Store and sell the Diesel Anti-Wear Agent that has passed the inspection. During storage, it is necessary to pay attention to moisture protection, sun protection, high temperature protection, etc. to ensure the stability and service life of the product. The above is the production process of Diesel Anti-Wear Agent. The quality of each link needs to be strictly controlled during the production process to ensure that the products produced meet the standards and requirements. At the same time, it is also necessary to comply with relevant laws and regulations, protect the environment, and ensure the safety of the production process.

The full name of antifreeze should be called antifreeze coolant, which means coolant with antifreeze function. Antifreeze can prevent the coolant from freezing and cracking the radiator and freezing the engine cylinder block or head during cold winter parking. Many people think that antifreeze is only used in winter, but in fact, antifreeze is used all year round. Antifreeze is a kind of coolant containing special additives. It is mainly used in liquid-cooled engine cooling systems. Antifreeze has excellent properties such as antifreeze in winter, antiboiling in summer, antiscale and anticorrosion all year round. At present, more than 95% of water-based antifreeze using ethylene glycol at home and abroad uses ethylene glycol. Compared with tap water, the most significant feature of ethylene glycol is antifreeze, while water cannot prevent freezing. Secondly, ethylene glycol has a high boiling point, low volatility, moderate viscosity, small change with temperature, and good thermal stability. Therefore, glycol-based antifreeze is an ideal coolant.

Neutralizers are substances that interact with acids (acid salts) and bases (basic salts) to adjust the pH of the medium. It has a great impact on emulsion polymerization, acetalization reaction, resin curing, latex storage, etc. Any organic or inorganic alkaline/acidic substance that can form a salt with a COOH or an OH group can be used as a neutralizing agent, but the neutralizing effects of different alkaline/acidic substances vary greatly. Commonly used neutralizing agents include sodium hydroxide, potassium hydroxide, sodium bicarbonate, sodium acetate, sodium pyrophosphate, sodium carbonate, ammonia, hydrochloric acid, phosphoric acid, formic acid, acetic acid, AMP-95, diethanolamine, triethanolamine, and aminoacetic acid. wait. In anionic water-based polyurethane emulsions, when potassium hydroxide is used as the neutralizing agent, the emulsion has a better appearance, is less likely to yellow during storage and high-temperature use, and has better water resistance of the emulsion coating. The degree of neutralization should be controlled at 90% to 100%, and the neutralization temperature should be 30 to 40°C.

Antistatic agents are a type of additive that are added to plastics or applied to the surface of molded products to reduce the accumulation of static electricity. Generally, according to different usage methods, antistatic agents can be divided into two categories: internally applied type and externally applied type. Internally applied antistatic agents are mainly used for plastics. Antistatic agents can also be divided into two categories: temporary and permanent according to their performance.

Metal deactivators are additives in gasoline, jet fuel, etc. Often used together with antioxidant and anti-adhesive agents. It is used to inhibit the catalytic effect of metals, especially copper, on oil oxidation, so as to give full play to the role of antioxidant anti-adhesive agents and reduce the dosage of antioxidant anti-adhesive agents. [1] Commonly used are the carbonyl condensates of amines, such as N, N′-disaliylidene-1,2-propanediamine. Metal passivators can react with metal ions to form chelates, leaving the metal in a passivated state that loses its oxidation-promoting effect. The added amount is about 0.0003-0.001% (weight).

N-methyldiethanolamine (MDEA, also known as methylaminodiethanol, N,N-bis(2-hydroxyethyl)methylamine N-Methyldiethanolamine Molecular formula: CH3-N(CH2CH2OH)2 Structural formula: HO — C H2 — C H2 ╲ N — CH3 ╱ HO — CH2 — CH2 Features: Contains two hydroxyl groups and one amino group. The hydroxyl groups reduce the vapor pressure and increase the solubility, which is beneficial to the absorption of acid gas, can increase the concentration, reduce the circulation volume, and reduce energy consumption. The presence of the methyl group in the amino group reduces the alkalinity and activity of the amino group, and reduces the absorption rate of CO2. The molecular weight is 119.16, the melting point is -21°C, the flash point is 127°C, the freezing point is -21°C, and the refractive index is 1.4678. Viscosity (20℃) 101mPa·s. The latent heat of vaporization is 519.16KJ/Kg. Colorless or slightly yellow viscous liquid, boiling point 247°C, easily soluble in water and alcohol, slightly soluble in ether. Combustible. Non-toxic, LD504780mg/kg. It is a new solvent for selective desulfurization and decarburization with excellent performance. It has the advantages of high selectivity, low solvent consumption, significant energy saving effect, and is not easy to degrade.