Anhydrous Sodium Sulfate For Papermaking
Product advantages
Anhydrous sodium sulfate (Na2SO4) has a wide range of applications
Anhydrous sodium sulfate has a wide range of applications in various fields, including industry, chemistry, and pharmaceuticals. In the industrial field, it can be used in textiles, glass manufacturing, petrochemicals, metal processing, corrosion prevention, and wastewater treatment; In the field of chemistry, it is used in drug production, silicone manufacturing, food processing, ink production, photography and rubber industry; In the pharmaceutical field, anhydrous sodium sulfate is commonly used as an adjuvant in drugs or biologics to help maintain the stability of biological products, promote protein purification processes, and regulate the acid-base balance of solutions.
Efficient water absorption capacity
Stable chemical properties
Low cost and high efficiency
Paper industry
Fillers and coating agents
Improve paper whiteness, smoothness, and printing performance, with low calcium and magnesium ion content to avoid paper quality degradation
Product parameters
Project | index | ||
Class Ⅱ | |||
First Grade | Conformity | ||
Na2SO4 mass% | ≥ | 98.0 | 97.0 |
Water insoluble matter% | ≤ | 0.10 | 0.20 |
Ca, Mg (calculated as Mg) content% | ≤ | 0.30 | 0.40 |
Chloride (calculated as CT -)% | ≤ | 0.70 | 0.90 |
Fe% | ≤ | 0.010 | 0.040 |
H2O% | ≤ | 0.50 | 1.0 |
Whiteness(R457)% | ≥ | 82 | - |
Product application
Advantages of anhydrous sodium sulfate (Na2SO3) in papermaking:
Natural decolorization ability:
In the traditional paper production process, the color and texture of the paper are easily changed or dyed due to bleaching. Anhydrous sodium sulfate, as a natural decolorizing factor, can effectively absorb the color released by unbleached substances (such as NaCO3) when added to aqueous solutions, and further damage and deepen during subsequent bleaching processes.
This is of great significance for ensuring consistent color and texture of each batch of paper, especially in production environments with strict requirements for color scheme control and technology.
As a solvent:
In the papermaking process, the combination of water and carbon requires a large amount of water (the difference between water and water lipids is significant). During this process, soaking in water with natural decolorizing factors can enhance the color reaction of the solution, laying the foundation for subsequent bleaching and drying.
The use of anhydrous sodium sulfate as a solvent can improve the stability of the solution and promote the uniformity of the mixture. The dosage of this solvent may make the bleaching effect more long-lasting, thereby improving the quality of paper and production efficiency.
Improve the stability of the slurry:
The traditional papermaking process involves mixing bleach with water and then drying and pressing the pulp. As a decolorization factor, anhydrous sodium sulfate can adjust the pH and pH value of the solution in advance to avoid the direct use of strong acidic or alkaline solutions, thus protecting paper and reducing pollution.
This plays a crucial role in improving the overall stability of the slurry, helping to reduce the damage caused to the paper during bleaching and lowering costs.
