What are the main uses of lignin sulfonate calcium salt?
Calcium lignin sulfonate has a wide range of uses. In the paper industry, it is also an auxiliary for pulp cooking. When cooking wood to make pulp, calcium lignin sulfonate can make the cooking liquid more easily penetrate into the wood, accelerate the dissolution of lignin, thus helping to shorten the cooking time, reduce energy consumption, and improve the yield and quality of pulp.
In the construction field, it can be used as a concrete water reducer. Adding an appropriate amount of calcium lignin sulfonate to the concrete mixture can significantly reduce its water consumption, thereby improving the fluidity of concrete. In this way, the amount of cement can be reduced and the cost can be saved without reducing the properties such as the strength of concrete. And because of its slow setting characteristics, it can prolong the setting time of concrete. In high temperature environments or long-distance transportation of concrete, it can effectively prevent premature setting of concrete and ensure the smooth progress of construction.
In agriculture, calcium lignin sulfonate is also used. It can be used as a soil conditioner, which can improve the agglomeration of soil, improve the structure of soil, improve the water and fertilizer retention capacity of soil, and create a better growth environment for plant roots. At the same time, it can be used as a slow-release agent for pesticides and fertilizers, allowing pesticides and fertilizers to be released slowly, prolonging their effect, improving utilization rate, and reducing environmental pollution.
Furthermore, in the refractory industry, calcium lignin sulfonate can act as a binding agent. It can effectively bond the components of refractory materials together, enhance the strength and stability of refractory materials, and maintain good performance in high temperature environments to meet the needs of high temperature equipment such as industrial kilns. All of these are the main uses of calcium lignin sulfonate.
What are the physical properties of lignin sulfonate calcium salt?
Calcium lignin sulfonate is a kind of lignin sulfonate. Its physical properties are unique and it is used in many fields.
Looking at its appearance, calcium lignin sulfonate is mostly in the form of light brown free-flowing powder, with a lighter color and uniform texture. This form is conducive to storage and transportation, and is also easy to use in proportion in various production processes.
Solubility is one of its important characteristics. Calcium lignin sulfonate is soluble in water and can form a stable solution. In water, its molecules will gradually disperse and interact with water molecules, showing good solubility. This property makes it widely used in many aqueous systems, such as in concrete admixtures, which can be evenly dispersed in concrete mixing water to exert its due effectiveness.
Surface activity is also quite significant. Calcium lignin sulfonate molecules have a specific structure, with hydrophilic groups at one end and hydrophobic groups at the other end. This unique structure allows them to reduce the surface tension of liquids and align them at the interface. In the paper industry, it can be used as a dispersant to make the charge distribution on the fiber surface more uniform by virtue of surface activity, preventing fiber agglomeration, thereby improving the uniformity and strength of paper.
In addition, calcium lignin sulfonate also has certain adsorption properties. It can adsorb on the surface of some solid particles and change the surface properties of the particles. In the field of soil improvement, it can be adsorbed on the surface of soil particles, enhancing the agglomeration between soil particles, and improving the soil's water and fertilizer retention capacity, which is beneficial to improving soil structure.
Furthermore, calcium lignin sulfonate has certain stability. Under normal temperature, humidity and common chemical environments, its chemical structure is not easy to change significantly, and its physical and chemical properties can be maintained for a long time, providing protection for its application under different environmental conditions.
What are the precautions for lignin sulfonate calcium salt during storage?
When storing calcium lignin sulfonate, many things need to be paid attention to.
First, moisture prevention is extremely critical. Calcium lignin sulfonate is easy to absorb moisture, and once it is damp, its performance may be affected. Therefore, it should be placed in a dry place and packaged tightly. If the storage environment humidity is high, water vapor is easy to penetrate, causing calcium lignin sulfonate to agglomerate, which is not only inconvenient to use, but also damages its quality and use effect.
Second, the temperature cannot be ignored. Avoid high temperature environments. If the temperature is too high, it may cause changes in the chemical properties of calcium lignin sulfonate, which will reduce its performance. It should be stored in a cool place, usually 5 ° C to 35 ° C. Excessive temperature or accelerate its deterioration, and too low temperature may freeze it and affect the use.
Third, avoid mixing with other chemicals. Calcium lignin sulfonate is relatively active chemically, and it comes into contact with certain chemicals or undergoes chemical reactions, which can change its performance. Like strong oxidants, strong acids, strong bases, etc., should not be stored with calcium lignin sulfonate to prevent accidental chemical reactions, endangering quality and safety.
Fourth, the storage period also needs to be paid attention to. Although calcium lignin sulfonate has a certain stability, it cannot be stored indefinitely. Over time, its performance will gradually change. Therefore, the principle of first-in, first-out should be followed, and it should be used up within the shelf life as much as possible to ensure the use effect.
Fifth, fire prevention is also an important matter. Although calcium lignin sulfonate is not flammable, it still poses a certain risk in case of open fire or high temperature. The storage site should be kept away from fire sources and high temperature equipment, and necessary fire extinguishing facilities should be equipped to prevent fires.
Only by paying proper attention to the above items can we ensure that calcium lignin sulfonate maintains good performance during storage for subsequent use.
What is the production process of lignin sulfonate calcium salt?
The production of lignin sulfonic acid is an exquisite method. At the beginning of its production, it is often used as a by-product source for the production of lignin sulfonic acid. In this process, wood or other plant raw materials are immersed in the cooking liquid of lignin sulfonic acid, which can be cooked at a specific temperature and force. In this case, the lignin is modified, and the sulfonic acid group is combined to form lignin sulfonic acid.
In addition, the mixed liquid obtained by cooking needs to be prepared in a general manner. By means of solids removal, a clear liquid containing lignin sulfonic acid can be obtained. This clear liquid may contain other substances, so it needs to be extracted in a step. It can be removed by means of production, precipitation, etc., to improve the degree of lignin sulfonic acid.
Furthermore, it takes a long time to melt the solution. Steaming and other methods are often used to reduce the moisture in the solution, so that the degree of lignin sulfonic acid can be increased. When the degree is to a certain extent, according to demand, the finished product of lignin sulfonic acid can be obtained by the method of drying or cold drying.
The whole production process needs to be controlled at each step. The degree of cooking, the degree of dryness, etc., are all important for the performance of lignin sulfonic acid products. Only by precisely grasping the quality of each process can high-quality lignin sulfonic acid be prepared. For the needs of general workmanship, such as concrete water, dispersion, etc.
What are the advantages of lignin sulfonate calcium salt compared to other similar products?
Compared with other similar products, xylocellulose sulfonate chrome tanning agent has various advantages.
First, its raw material sources are extensive and low cost. Xylocellulose is quite common in nature, and it is rich in many wood processing wastes and crop straws, which makes it convenient to obtain raw materials and effectively control costs. Compared with some similar products that require special raw materials or complex extraction processes, the cost advantage is significant, which can reduce production expenses and effectively improve economic benefits in large-scale production applications.
Second, the tanning agent has excellent tanning properties. It can be tightly combined with leather fibers to give leather good softness and fullness. The leather tanned by it feels comfortable, has good texture, and its physical and mechanical properties are also enhanced. For example, the tensile strength, tear strength and other indicators are improved, which improves the durability of the leather and prolongs the service life. In terms of leather quality improvement, it is better than some congeneric products with poor tanning effect.
Third, it has certain environmental protection advantages. In the process of production and use, relatively few pollutants are generated. Some traditional tanning agents contain harmful substances such as heavy metals, which are easy to cause pollution and harm to the environment, while xylocellulose sulfonic acid chrome tanning agent has low risk in this regard, which is in line with the current environmental protection concept and requirements, is conducive to the sustainable development of the leather industry, and is more competitive than many congeneric products at the environmental protection level.
Fourth, the chemical stability is quite good. Under different temperatures, pH and other conditions, the properties are relatively stable, and it can adapt to a variety of tanning process conditions, which is convenient for production operation and control. It is not limited by extreme conditions and provides guarantee for the smooth development of the tanning process. Compared with similar products with poor chemical stability and strict environmental conditions, the application is more convenient.
