Sichuan Yinhe Chemical’s Sodium Sulfate Bipolar Membrane Project: Driving Sustainability and Circular Economy
The Sodium Sulfate Resource Regeneration Project, implemented by Sichuan Yinhe Chemical Co., Ltd., showcases the transformative power of Lanran Tech’s bipolar membrane electrodialysis (BPED) technology. The project converts sodium sulfate by-products or mirabilite from chromium salt production into reusable sulfuric acid and liquid caustic soda, establishing a circular economy while significantly reducing hazardous waste.
Key Outcomes and Benefits
The project, designed to process 10,000 tons of sodium sulfate annually, operates in two phases with four BPED systems. It delivers:
36,000 cubic meters of 90 g/L sulfuric acid annually.
40,000 cubic meters of 80 g/L liquid caustic soda annually.
Daily processing of 18 tons of sodium sulfate (solid equivalent).
This innovative solution has provided:
Cost Efficiency: With an energy consumption of only 2,200 kWh/ton of sodium hydroxide, it significantly lowers acid and alkali procurement costs.
Environmental Impact: Minimizes hazardous waste generation and reduces disposal expenses.
Sustainability: Recycled sulfuric acid and caustic soda are reused in various processes, such as pseudoboehmite production and environmental gas scrubbing.
Lou Yontong, CEO of Lanran Tech, remarked: “This project highlights how Lanran Tech’s advanced BPED technology helps industries achieve both environmental sustainability and cost efficiency. By transforming waste streams into valuable resources, we enable a true circular economy.”
About Sichuan Yinhe Chemical Co., Ltd.
Founded in 1965 and based in Mianyang, Sichuan, Sichuan Yinhe Chemical is a leading enterprise specializing in chromium resource development and advanced chemical manufacturing. With a market presence in over 40 countries and a 25% domestic market share, the company is an industry leader in innovation, sustainability, and technological advancement.
About Lanran Tech
Lanran Tech is a global leader in water treatment and resource recovery technologies, specializing in advanced ion-exchange membranes and electrodialysis systems. From waste recycling and carbon capture to lithium battery recovery, Lanran Tech delivers sustainable, scalable solutions that empower industries to achieve operational excellence and environmental responsibility.
