Shanghai Sanji New Material Technology Co., Ltd.has officially launched China’s first domestically produced phosphoric acid recovery membrane, alongside a full lineup of diffusion dialysis membrane solutions for industrial waste acid treatment. The self-developed membrane series features zero electricity consumption, 80–90% free acid recovery efficiency, and over 95% metal ion rejection performance. Engineered for aluminum anodizing, titanium dioxide pigment production and stainless steel pickling industries, the new products address rising zero-liquid-discharge compliance demands for China’s low-carbon industrial transformation. The localized membrane portfolio fills a long-standing domestic supply chain gap that previously relied entirely on imported phosphoric acid recovery membranes, offering cost-effective, maintenance-free industrial wastewater recycling alternatives.
Core Product Series and Technical Performance
Shanghai Sanji’s 3 major diffusion dialysis membrane series adopt homogeneous ion exchange membrane technology, featuring uniform surface functional group distribution and low membrane resistance to ensure stable, long-term separation performance in harsh industrial acid waste environments.
DD Series – General Acid Recovery Membrane
The DD series targets hydrochloric acid and sulfuric acid wastewater, the most common waste acid types in metal processing industries. With a membrane thickness of 90–120 μm, membrane resistance of 0.8–1.3 Ω·cm² and ion exchange capacity of 1.5–2.3 meq/g, the series maintains 80–90% free acid recovery and over 95% metal ion rejection. Driven solely by solution concentration differentials, the zero-power membrane system supports stable continuous operation for more than 8,000 hours annually. A single standard industrial unit achieves a processing capacity of 1,500 L/h for hydrochloric acid wastewater and 730 L/h for sulfuric acid pickling wastewater.
PD Series – Phosphoric Acid Recovery Membrane
As China’s first domestically manufactured phosphoric acid recovery membrane, the PD series resolves the rapid degradation issue of conventional membranes in phosphoric acid working environments. Primarily applied in aluminum anodizing and chemical polishing processes, the membrane keeps aluminum ion residue below 1 g/L in recycled oxidation baths. This performance eliminates frequent bath replacement, reduces aluminum oxide production defects, and stabilizes surface quality for mass aluminum manufacturing lines, cutting overall production and wastewater treatment costs.
MD Series – Mixed Acid Recovery Membrane
The MD series is designed for complex mixed acid systems, including hydrochloric acid, nitric acid and hydrofluoric acid waste liquid. It delivers selective acid permeation and high-efficiency metal ion rejection, adapting to variable waste acid compositions in electronics etching, graphite processing and specialty chemical manufacturing scenarios, filling the demand gap for diversified industrial mixed acid recycling.
Diffusion Dialysis Equipment Integration and Operational Advantages
Supporting the full membrane series, Shanghai Sanji provides complete diffusion dialysis equipment covering laboratory to industrial scales, including SDD-30, SDD-55, SDD-110, SDD-160 and SDD-160S models. Each unit can be equipped with up to 400 membrane pairs, matching the maximum processing capacity of the membrane series.
All separation systems adopt full PLC automated unmanned operation and triple-layer anti-leak sealing structure. The core diffusion dialysis separation unit requires no external power supply and daily maintenance, with no corrosion-prone rotating electrical parts, ensuring high stability and safety in strong acid industrial environments.
Global Compliance, Certifications and Production Capacity
All membranes and supporting equipment are manufactured and inspected in accordance with ISO 9001 Quality Management System and ISO 45001 Occupational Health and Safety Management System standards. The company holds national-level industrial credentials as a National High-Tech Enterprise and Shanghai Specialized, Refined, Unique & Innovative SME, recognizing its proprietary core membrane separation technology and niche market advantages.
Shanghai Sanji operates 3 fully automatic ion exchange membrane production lines, including two 60,000 m²/year lines and one 120,000 m² wide-width line, with an annual production capacity of 250,000 m² of homogeneous separation membranes. Two authorized Chinese invention patents (ZL202110932816.8, ZL202111067052.7) protect its independent core material and structural technologies, forming a complete intellectual property barrier against imported products.
Global Supply and Customization Services
The full DD, PD and MD membrane series are available for global orders via Shanghai Sanji’s direct sales channel. Volume orders carry a standard lead time of 4 to 6 weeks, while small-batch prototype orders for client pilot testing can be delivered within 10 working days. The company provides global door-to-door logistics support for clients in Southeast Asia, Europe and North America through authorized international freight partners.
Beyond standard products, the firm offers customized industrial solutions, including tailored membrane specifications for specific acid types and working conditions, custom membrane stack configurations, pre-deployment pilot testing and on-site validation. It also provides one-stop technical support covering wastewater composition testing, process simulation, equipment installation, commissioning and long-term remote after-sales troubleshooting.
Executive and Customer Testimonials
“The official launch of our complete diffusion dialysis membrane portfolio marks a landmark breakthrough for localized waste acid recycling technology in heavy industries.” said Mao Wanjuan, Corporate Sales Lead at Shanghai Sanji New Material Technology Co., Ltd. “Our self-developed system recaptures 80–90% usable free acid from wastewater, significantly reducing clients’ virgin acid procurement and alkali neutralization costs. Mid-sized aluminum extrusion factories can cut chemical operation costs by 35% to 50% annually with our PD membrane units.”
Industry Market Background
According to industry research data, the global diffusion dialysis membrane market reached USD 229 million in 2024, with a projected value of USD 309 million by 2031 and a 4.3% compound annual growth rate. Another forecast estimates the market will grow to USD 362.1 million by 2035. Rising zero-liquid-discharge policies and resource recovery demands in metal finishing, steel treatment and chemical processing sectors are the core drivers of market growth.
As global carbon neutrality regulations become increasingly stringent, industrial enterprises are phasing out traditional chemical neutralization wastewater treatment methods with high energy consumption and high chemical costs. Energy-saving, zero-power membrane separation technology has become the mainstream development trend of industrial waste acid recycling, bringing broad market opportunities for high-performance diffusion dialysis membrane products.
Future Development Plans
Shanghai Sanji will continue to invest in R&D of homogeneous ion exchange separation membranes, focusing on improving acid selectivity, anti-aging durability and customized performance for TiO₂ pickling, stainless steel etching and electronic mixed acid recovery scenarios. The company plans to build regional sales and technical service hubs in Southeast Asia, the Middle East and Europe within the next 2 years, while recruiting global local agents to expand overseas market coverage.
About Shanghai Sanji New Material Technology Co., Ltd.
Founded in 2020, Shanghai Sanji New Material Technology Co., Ltd. focuses on R&D, production and global supply of homogeneous ion exchange membranes and integrated membrane separation systems for industrial wastewater and waste acid recycling. Headquartered in Shanghai, the company owns a manufacturing base in Yantai, Shandong Province, and a liaison office in Golmud, Qinghai Province.
Backed by an expert R&D team led by CAE academician Fei Weiyang and Professor Yu Jianguo, the firm has 31 PhD researchers and 37 master’s specialists dedicated to membrane technology innovation. It has over 10 years of industrial on-site service experience, with more than 200 sets of self-developed acid recovery equipment operating stably in over 100 industrial projects nationwide. Its core clients cover energy, chemical, new materials and pharmaceutical industries, including China National Petroleum Corporation and Fuyao Automotive Glass.
Media Contact
Company Name: Shanghai Sanji New Material Technology Co., Ltd.
Contact Person: Mao Wanju
Email: Send Email
Phone: +86-18616365899
Address:Room 202, Building 3, 2899 South Lianhua Road, Minhang District
City: Shanghai
Country: China
Website: http://www.smaxnms.com/
