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What are the main uses of Sodium Dodecylbenzenesulphonate?
Sodium+Dodecylbenzenesulphonate is sodium dodecyl benzene sulfonate, which has a wide range of uses and is used in daily use, industry and many other fields.
In the field of daily use, it is a key ingredient in many detergents. Cover because of its excellent decontamination, emulsification and foaming properties. Such as common washing powder and detergent, after adding sodium dodecyl benzene sulfonate, it can significantly enhance its ability to remove oil stains. Clothes stained with oil, washed with washing powder containing this ingredient, one end of the sodium dodecyl benzene sulfonate molecule will be adsorbed on the oil, and the other end of the hydrophilic group will be dissolved in water. After stirring and kneading, the oil will be dispersed into small oil droplets and removed from the clothes to achieve the effect of washing.
In the industrial field, in the textile printing and dyeing industry, it can be used as a refining agent, emulsifier, etc. When the fabric is refined, it can help remove natural impurities, oil stains, etc. on the fabric, and improve the wettability and whiteness of the fabric. In the paper industry, it can be used as a deinking agent. When waste paper is recycled and reused, it can separate and disperse the ink particles from the paper fibers, achieve the purpose of deinking, and enable the paper to be regenerated. In addition, in the metal processing, oil mining and other industries, it also has its own shadow. Adding it to the cutting fluid of metal processing can play the role of lubrication, rust prevention, and cleaning; when oil is mined, it can be used as an oil displacement agent to reduce the oil-water interface tension and improve crude oil recovery. In conclusion, sodium dodecyl benzene sulfonate plays an important role in many industries due to its unique properties, which greatly facilitates and promotes production and life.
What are the environmental impacts of Sodium Dodecylbenzenesulphonate?
Sodium Dodecylbenzenesulphonate, that is, sodium dodecylbenzene sulfonate, is a common anionic surfactant, which is widely used in industry and daily necessities. However, it also has many effects on the environment:
- ** Effects on aquatic organisms **: If this substance flows into rivers, lakes and seas in large quantities, it will threaten the survival of aquatic organisms. It has surface activity, which can change the permeability of aquatic organisms' cell membranes, cause intracellular substances to exude, and interfere with normal physiological functions. For example, fish are exposed to high concentrations of sodium dodecylbenzene sulfonate, or they have breathing difficulties and abnormal behavior. Long-term exposure or affect reproduction, which will reduce the population. It also affects plankton, which is the foundation of aquatic ecosystems, and its impact will cause food chain imbalance.
- ** Impact on soil ecology **: Some of them will enter the soil through sewage irrigation and other channels. It will change the physical and chemical properties of the soil, affect the structure of soil aggregates, and reduce soil aeration and water permeability. It may also combine with metal ions in the soil to affect the availability of soil nutrients. And because it is difficult to degrade, it will accumulate in the soil, affect the structure and function of soil microbial community, inhibit the decomposition of organic matter and nutrient transformation by microorganisms, and ultimately affect plant growth.
- ** Indirect effects on the atmospheric environment **: During production and use, a small amount may enter the atmosphere in the form of aerosols. Although it is not a major atmospheric pollutant, its surface activity may affect the formation and evolution of particulate matter in the atmosphere, indirectly affecting atmospheric visibility and climate.
What are the precautions for using Sodium Dodecylbenzenesulphonate?
Sodium dodecyl benzene sulfonate, when using, several things should be paid attention to.
The first word about its solubility. The dissolution state of this agent in water is quite critical. When used, the water temperature should be appropriate, and if the water temperature is too low, the dissolution will be slow, or it will cause insolubility, which will affect its efficacy. Therefore, if it is soluble in warm water, it can be dissolved quickly and evenly, so that the dispersion is uniform.
Times and concentration control. With this agent, the concentration needs to be precisely allocated. If the concentration is too high, although the decontamination power may increase, it may remain on the surface, which is not conducive to environmental protection; if the concentration is too low, the decontamination power will not be reached, and it will be difficult to clean. When the concentration is carefully determined according to the weight of the thing to be cleaned and the stain.
In addition, its compatibility with other agents. When using sodium dodecyl benzene sulfonate, it is often used in combination with other auxiliaries, active agents, etc. However, when compatible, it is necessary to carefully review its chemical properties to prevent mutual reaction and lead to poor performance. If combined with some cationic active agents, or precipitate, it will lose its effectiveness.
In addition, safety should not be ignored. Although this agent is less toxic, it comes into direct contact with the skin, eyes, or irritation. Use protection when using, such as gloves, goggles, etc. If you accidentally touch it, rinse it with a lot of water quickly, and seek medical attention if necessary.
and its impact on the environment should also be taken into account. After use, wastewater contains this agent, which may affect the ecology of the water body. Therefore, the content of wastewater should be reduced in accordance with environmental regulations to reduce the harm to the environment.
What are the physical and chemical properties of Sodium Dodecylbenzenesulphonate?
Sodium-dodecyl benzene sulfonate is a common surfactant. Its physical and chemical properties are quite worthy of detailed investigation.
In terms of physical properties, this substance is mostly white or light yellow powder under normal conditions, with fine texture, easily soluble in water, and can show good dispersion in water. Looking at its solubility, at room temperature, it can dissolve in water at a suitable rate to form a uniform solution. The appearance of this solution is clear and transparent. And it has good wettability, allowing water to quickly spread on the solid surface, like a spring rain, without dead ends missing.
As for chemical properties, its molecular structure contains sulfonic acid groups, so it has anionic properties. In aqueous solution, sulfonate anions and sodium ions can be ionized, and this ionization property makes it have good decontamination ability. When it encounters dirt such as grease, sulfonate anions are lipophilic at one end and will penetrate deep into the oil; while the hydrophilic group at the other end faces outward and is connected to water. In this way, it is like a bond, wrapping the oil and dispersing it in water to achieve decontamination effect. Moreover, the chemical properties of this substance are relatively stable, and under normal conditions, it is not easy to react violently with common inorganic compounds. When encountering strong acids, its sulfonate group may be affected and its stability will decrease. In alkaline environments, its performance is relatively stable, and it can continue to exert the effect of surface activity, helping various cleaning and industrial production processes.
What is the production process of Sodium Dodecylbenzenesulphonate?
The production process of sodium-dodecyl benzene sulfonate is an important matter in chemical manufacturing. The method is roughly as follows:
First take dodecyl benzene, and use sulfuric acid or fuming sulfuric acid as the sulfonating agent. In the sulfonation step, the dodecyl benzene and the sulfonating agent are put into the reactor in a specific ratio. This reaction needs to observe a certain temperature range, probably in a moderately warm environment, between about 40 and 60 degrees Celsius. If the temperature is too high, it may cause side reactions to occur and damage the quality of the product; if the temperature is too low, the reaction will be slow and time-consuming.
In the reactor, the two contact, and the sulfonic acid group is quietly added to the benzene ring to form dodecyl benzene sulfonic acid. In this process, the mixer continues to operate to fully blend the reactants and ensure a uniform reaction.
After the sulfonation reaction is completed, the product needs to be neutralized. Usually add a sodium hydroxide solution slowly, so that the dodecyl benzene sulfonate reacts with it and turns into sodium-dodecyl benzene sulfonate. In this step, the control of pH value is crucial. The pH value of the reaction system must reach between seven and eight to ensure the stability of the product properties.
After neutralization, the product or containing impurities must be separated and purified. It can be filtered to remove insoluble matter; it can be evaporated and concentrated to increase the concentration of the product solution; and finally cooled and crystallized to obtain pure sodium-dodecyl benzene sulfonate crystals.
This process is interlocking step by step, and each link needs to be carefully handled in order to obtain high-quality sodium-dodecylbenzene sulfonate products to meet the needs of many industries and civil applications.
