NINGBO INNO PHARMCHEM CO.,LTD. is a key supplier of anhydrous sodium sulfate, an important chemical utilized in the papermaking industry, particularly within the Kraft process. This inorganic compound plays a crucial role in pulp production, contributing to the efficiency and chemical cycle of paper manufacturing.

The Kraft process is the dominant method for producing wood pulp, a primary component of paper. In this process, wood chips are cooked in a solution of sodium hydroxide and sodium sulfide at high temperatures and pressures. The sodium sulfide is crucial for breaking down lignin, the compound that binds cellulose fibers together in wood. While the process is designed for high chemical recovery, some sodium compounds are lost and need to be replenished. This is where anhydrous sodium sulfate plays a role.

Historically, sodium sulfate was added to the recovery cycle to be converted into sodium sulfide. It served as a source of sulfur in the process. Advances in the Kraft recovery boiler's thermal efficiency have improved sulfur recovery rates, reducing the need for external sodium sulfate makeup in many modern mills. However, it remains an important chemical for specific applications and for mills looking to optimize their chemical balance. NINGBO INNO PHARMCHEM CO.,LTD. provides high-purity anhydrous sodium sulfate that meets the industry's specifications for this application.

The consistency and quality of the sodium sulfate supplied by NINGBO INNO PHARMCHEM CO.,LTD. ensure that it integrates smoothly into the papermaking chemical cycle. For paper mills, sourcing reliable chemicals is essential for maintaining production efficiency and product quality. Many inquire about the purchase of sodium sulfate for their operations.

While its role may have evolved with technological advancements, anhydrous sodium sulfate continues to be a relevant chemical in certain papermaking operations. NINGBO INNO PHARMCHEM CO.,LTD. is committed to providing the necessary chemical inputs to support the global paper industry, ensuring a steady supply of this vital compound.