Liner Alkyl Benzene Sulphonic Acid

Linear alkylbenzene sulfonic acid has a wide range of uses. In the field of daily chemical industry, it is a key raw material for synthetic detergents. The washing powder, detergent, etc. made from this have strong decontamination power, can remove oil stains and stains, and are commonly used for home cleaning. Cover because of its good surface activity, can emulsify grease and disperse in water, so it can wash all kinds of utensils.
In industry, it also has many applications. For example, in the textile printing and dyeing industry, it can be used as a refining agent and a penetrant. Fabrics can be treated with it to make dyes more evenly adhered and have a brighter color. And it helps to remove impurities on fabrics and improve fabric quality.
In the leather industry, linear alkylbenzene sulfonic acid can be used as a degreaser. Before tanning, leather contains a lot of grease. With its degreasing, it can make leather soft and tough, which is conducive to subsequent processing.
In the paper industry, it can be used as a deinking agent. To recycle waste paper, ink needs to be removed. Linear alkylbenzene sulfonic acid can promote the separation of ink and paper fibers, achieving the purpose of deinking, so that the paper can be re-pulped and made into paper to help resource recycling.
In addition, in the field of metal processing, it can be used as a cleaning agent. During the processing of metal products, oil stains, cutting fluids, etc. are often left on the surface. A cleaning agent based on linear alkylbenzene sulfonic acid can effectively remove impurities and ensure the cleanliness of the metal surface. It is conducive to subsequent painting, electroplating and other processes to improve the quality and appearance of metal products. From this perspective, linear alkylbenzene sulfonic acid has important uses in daily and industrial applications, and is an indispensable material in the chemical industry.

The production process of straight-chain triglyceride stearic acid is a complex and delicate process.
The first to bear the brunt is the selection of raw materials. Stearic acid is mostly derived from animal and vegetable oils, such as tallow, palm oil, etc. When selecting oils and fats, it is necessary to strictly review their quality and purity, which is related to the quality of the final product.
Pretreatment of oils and fats is crucial. It needs to go through steps such as degumming, deacidification, and decolorization. Degumming aims to remove phospholipids and other gums in oils to prevent them from interfering in subsequent reactions. Deacidification is to reduce the acid value of oils and is usually achieved by alkali refining. Decolorization is commonly used as an adsorbent such as activated clay to remove impurities such as pigments in oils and fats.
This is followed by the transesterification reaction. This is the core step in the production of straight-chain triglyceride stearic acid. Often assisted by a catalyst, at a suitable temperature and pressure, the transesterification reaction between oil and glycerol occurs. Catalysts can be divided into two categories: homogeneous and heterogeneous. Homogeneous catalysts have high activity and fast reaction speed, but separation and recovery are not easy; heterogeneous catalysts are easy to separate and can be reused. The reaction temperature and pressure also need to be precisely controlled. If the temperature is too low, the reaction is slow; if it is too high, it is easy to cause side reactions.
After the reaction is completed, the product needs to be separated and purified. First, physical methods, such as filtration and centrifugation, are used to remove the catalyst and unreacted solid impurities Then distillation, extraction and other means are used to further purify the product to obtain high-purity linear triglyceride stearic acid.
Finally, the product needs to be tested and packaged. Test its various indicators, such as acid value, iodine value, melting point, etc., to ensure that it meets Quality Standards. Then properly packaged to prevent deterioration due to external factors during storage and transportation.
To sum up, the production process of linear triglyceride stearic acid requires fine operation and strict control to obtain high-quality products.

"Tiangong Kaiwu" was written in the Ming Dynasty. At that time, there was no modern scientific and systematic expression of the Quality Standard of linear glycerol tristearic acid. However, according to the ancient people's cognition of oil-related substances, it may be discussed from the following aspects.
In terms of oil properties, although the ancients did not have precise quantitative indicators, they paid attention to appearance observation. Pure oil, when the color is clear, there are no obvious impurities and odors. For example, the high-quality oil extracted should be translucent in sunlight, without a sense of chaos, with a peaceful smell and no pungent smell such as rancidity.
When it comes to texture, the ancients judged by touch and practical experience. High-quality such oils may have a suitable consistency at room temperature, are not thin or greasy, and are smooth and uniform when applied. If it is too thin, or suspected of being mixed with light substances; if it is too thick, or contains too many impurities.
Furthermore, the ancients attached great importance to its stability. Under conventional storage conditions, after a certain period of time, deterioration and stratification should not occur rapidly. If the initial good properties can be maintained for a long time during storage, it can be regarded as better quality.
And in practical application scenarios, such as cooking, it can make food present a good flavor and taste; used for lighting, it can burn stably and shine for a long time; used in some processes, it can play its expected functions such as lubrication and bonding, and it is in line with the Quality Standards of the ancients. Although there is no modern such accurate and quantitative Quality Standards, the ancients also formed a set of effective evaluation methods for the quality of similar substances with long-term practical experience to ensure their application in life and production.

Straight-chain triglycerides are important components of oils and fats. During storage and transportation, many matters need to be paid careful attention.
When storing, the first ambient temperature. If the temperature is too high, straight-chain triglycerides are prone to heat and accelerate oxidation, causing their quality to deteriorate. After the oil is rancid, the smell and taste become worse, and substances that are harmful to health may be produced. Therefore, it should be stored in a cool place to delay the oxidation process and maintain its quality.
The second is the influence of light. Light, especially ultraviolet rays, can promote the oxidation reaction of straight-chain triglycerides. It is recommended to choose a dark material for storage containers, such as brown glass bottles, or place them in a dark place to reduce the effect of light on them.
In addition, moisture is also critical. Moisture will cause the hydrolysis of straight-chain triglycerides, generating free fatty acids and glycerol, reducing the stability of grease and increasing the risk of rancidity. The storage environment must be dry, and the container is well sealed to prevent the intrusion of external moisture.
During transportation, stability is of the utmost importance. Bumps and vibrations or frequent collisions and friction between grease and containers accelerate oxidation and quality changes. Transportation tools should be selected with good stability, and road conditions must also be considered to avoid severe bumps.
Temperature control during transportation should not be underestimated. In summer, when the temperature in the cabin is high or too high, cooling measures need to be taken, such as refrigeration equipment; in winter, when the temperature is low, some linear triglycerides may solidify, which affects their fluidity and use. At this time, it may be necessary to properly keep warm to ensure their good condition.
In addition, avoid excessive contact with air. The transportation container should be filled as much as possible to reduce internal air retention, or filled with inert gases such as nitrogen to create an oxygen-free environment and prevent oxidation.
In summary, linear triglycerides need to be properly controlled, protected from light, and moisture during storage and transportation to ensure smooth transportation and reduce air contact in order to ensure their quality and stability.

The author of "Tiangong Kaiwu" is a scientific and technological book written by Song Yingxing in the Ming Dynasty, detailing various processes and products. As for the impact of sodium linear alkylbenzene sulfonate on the environment and human health, let me tell you in detail.
Sodium linear alkylbenzene sulfonate, which is commonly found in many detergents. At one end of the environment, it has high biodegradability. Compared with the branched-chain alkylbenzene sulfonate used in the past, the straight-chain degradation is relatively smooth. However, if it is poured into the water body in large quantities, it can still cause several problems. When it accumulates in the water body, or causes the intensification of eutrophication in the water body. Because it contains sulfur, phosphorus and other elements, it can provide rich nutrients for phytoplankton such as algae in the water, causing them to overmultiply. After the algae grow wildly, breathing at night consumes a large amount of dissolved oxygen in the water, causing a sharp decrease in the amount of dissolved oxygen in the water body, endangering the survival of fish and other aquatic organisms, and destroying the balance of water ecology.
In terms of human health, its impact cannot be ignored. When daily contact with detergents containing sodium alkylbenzene sulfonate, if it is not washed, the residual substances will come into contact with the skin, or cause skin allergies and other symptoms. In light cases, the skin is itchy, reddish, and in severe cases, it may cause skin inflammation. If eaten accidentally, this substance may interfere with normal physiological functions in the digestive system, irritate the gastrointestinal mucosa, and cause nausea, vomiting, abdominal pain and other uncomfortable symptoms. Long-term low-dose intake may also cause potential damage to important organs such as the liver and kidneys, affecting their normal metabolism and detoxification functions. Therefore, when using products containing sodium linear alkylbenzene sulfonate, we should adhere to the principle of moderation and pay attention to proper disposal of its waste to reduce its adverse effects on the environment and human health.