What is the pH range of 85% sodium aluminate content solution for different applications?

What is the pH range of 85% sodium aluminate content solution for different applications?

As a supplier of 85% Sodium Aluminate Content, I often get asked about the pH range of its solution and how it varies according to different applications. Sodium aluminate is a versatile chemical compound with a wide range of uses, and understanding the appropriate pH range for each application is crucial for achieving the best results.

Understanding Sodium Aluminate

Sodium aluminate (NaAlO₂) is a white, crystalline solid that is highly soluble in water. It is commonly used in water treatment, paper manufacturing, construction, and other industries. The 85% sodium aluminate content indicates a high - purity form of the compound, which offers enhanced performance in various applications.

pH Basics

pH is a measure of the acidity or alkalinity of a solution. It ranges from 0 to 14, with 7 being neutral. A pH less than 7 indicates an acidic solution, while a pH greater than 7 indicates an alkaline (basic) solution. The pH of a sodium aluminate solution is mainly determined by its concentration and the chemical reactions it undergoes in different environments.

Water Treatment

One of the most common applications of 85% sodium aluminate is in water treatment. In this process, sodium aluminate is used as a coagulant and flocculant to remove impurities such as suspended solids, colloids, and organic matter from water.

When added to water, sodium aluminate hydrolyzes to form aluminum hydroxide [Al(OH)₃] and sodium hydroxide (NaOH). The sodium hydroxide increases the pH of the water, making it more alkaline. The typical pH range for using 85% sodium aluminate in water treatment is between 6.5 and 8.5.

At a pH below 6.5, the aluminum hydroxide may not form effectively, reducing the coagulation and flocculation efficiency. On the other hand, if the pH is above 8.5, the aluminum hydroxide may redissolve, leading to the formation of soluble aluminum species that can cause problems such as turbidity and aluminum residues in the treated water.

For more information on other sodium aluminate products in water treatment, you can visit 80% Sodium Aluminate Content.

Paper Manufacturing

In the paper manufacturing industry, 85% sodium aluminate is used as a sizing agent and to control the pH of the paper - making process. Sizing agents help to improve the paper's resistance to water, ink, and other liquids.

The pH range for using sodium aluminate in paper manufacturing is typically between 7 and 9. At this pH range, the aluminum hydroxide formed from the hydrolysis of sodium aluminate can interact with the cellulose fibers in the paper pulp, creating a barrier that enhances the paper's sizing properties. If the pH is too low, the sizing effect may be reduced, and the paper may become more absorbent. If the pH is too high, it can cause problems such as fiber degradation and equipment corrosion.

Construction

In construction, 85% sodium aluminate is used as a concrete accelerator. It can speed up the setting and hardening process of concrete, especially in cold weather conditions.

When added to concrete, sodium aluminate reacts with the calcium hydroxide in the cement paste to form calcium aluminate hydrates. The pH of the concrete mixture during the addition of sodium aluminate should be maintained between 11 and 13. This high - pH environment is necessary for the proper formation of calcium aluminate hydrates, which contribute to the early strength development of the concrete.

You can find more details about Solid Sodium Aluminate for construction applications.

Other Applications

There are also other applications of 85% sodium aluminate, such as in the production of catalysts, ceramics, and textiles. In catalyst production, the pH range may vary depending on the specific catalyst being synthesized, but generally, it is in the alkaline range to promote the formation of the desired catalytic species.

In the textile industry, sodium aluminate can be used in dyeing and finishing processes. The pH range for these applications is usually between 7 and 10, which helps to optimize the dye - fiber interaction and improve the color fastness of the textiles.

Factors Affecting the pH Range

Several factors can affect the pH range of 85% sodium aluminate solutions in different applications. These include the initial pH of the system, the presence of other chemicals, the temperature, and the concentration of sodium aluminate.

For example, if the water being treated already has a high pH, less sodium aluminate may be needed to reach the desired pH range. Similarly, the presence of acidic or basic impurities in the raw materials can also influence the pH adjustment. Temperature can affect the hydrolysis rate of sodium aluminate, which in turn affects the pH change. Higher temperatures generally increase the hydrolysis rate, leading to a more rapid change in pH.

Quality Control

As a supplier of 85% Sodium Aluminate Content, we understand the importance of quality control in ensuring the proper pH range for different applications. We conduct strict quality tests on our products to ensure that they meet the required specifications.

Our sodium aluminate products are manufactured using advanced processes to ensure high purity and consistent quality. We also provide technical support to our customers to help them determine the appropriate dosage and pH range for their specific applications.

Conclusion

The pH range of 85% sodium aluminate content solution varies depending on the application. In water treatment, it is typically between 6.5 and 8.5; in paper manufacturing, between 7 and 9; in construction, between 11 and 13; and in other applications, it can range from 7 to 10 or be application - specific.

Understanding the appropriate pH range is essential for achieving the best performance and efficiency in each application. If you are interested in purchasing our high - quality 85% sodium aluminate products or need more technical advice, please feel free to contact us for procurement and negotiation.

References

• "Water Treatment Chemicals: A Guide to Coagulants and Flocculants" by Water Treatment Association.
• "Paper Science and Technology" by the Paper Industry Research Institute.
• "Concrete Chemistry and Technology" by the American Concrete Institute.