Anci Environmental Core Patent Named in Pudong Sci-Tech Innovation Funding List

On June 16, 2026, the Pudong New Area Intellectual Property Bureau released the "Public Announcement of Funded Projects for Intellectual Property Utilization under the 2026 Pudong New Area Science and Technology Innovation Special Fund," with a total of 145 high-quality projects across the district approved for funding. Shanghai Anci Environmental Protection Technology Co., Ltd. successfully entered the High-Value Patent Cultivation Special Program list with its invention patent ZL201510465539.9, "An Efficient Washing System for the Sulfate-Process Titanium Dioxide and Its Washing Technology." The public announcement has now concluded, and the special funding has been disbursed in full.

The criteria for this high-value patent cultivation funding were extremely stringent, targeting only core invention patents with overseas patent layouts, outstanding industrialization results, and industry-leading technology. Anci Environmental Protection's successful approval rests on the strength of this patented membrane washing technology, which has undergone fifteen years of continuous iteration, large-scale deployment, and full industry coverage.

Over 90% of China's titanium dioxide production capacity uses the sulfate process, and the traditional washing stage has long been trapped in multiple industry bottlenecks: water consumption is enormous, with up to 20–30 tons of water needed to wash each ton of titanium dioxide; during washing, ferrous iron readily oxidizes and precipitates, making impurities difficult to remove thoroughly, directly reducing the whiteness and weather resistance of the titanium dioxide; waste acid recovery is below 60%, and large volumes of acidic wastewater must be neutralized with lime, generating tens of millions of tons of titanium gypsum solid waste; and the process is lengthy with low automation, placing double pressure on labor and equipment investment costs.

Anci Environmental Protection launched dedicated R&D on membrane washing in 2011, developing its own tubular cross-flow microfiltration + nanofiltration combined membrane separation process and creating the core patent ZL201510465539.9, reconstructing the entire sulfate-process titanium dioxide washing workflow from the ground up, with multiple indicators reaching domestically leading and internationally advanced levels:

Using a cross-flow filtration mode to continuously retain metatitanic acid solids, soluble impurity ions such as iron, magnesium, and aluminum are efficiently separated, stably keeping the iron content of metatitanic acid within 20 ppm. This completely avoids the trivalent iron precipitation problem and significantly improves the whiteness and optical performance of the finished titanium dioxide, making it suitable for high value-added applications such as premium coatings, plastics, and inks.

A multi-stage washing water jacket internal circulation system reduces fresh demineralized water consumption by more than 30%; an integrated waste acid recovery unit purifies dilute sulfuric acid and returns it to the acid digestion step, greatly increasing waste acid recovery, substantially reducing neutralizing agent usage and titanium gypsum solid waste output, and easing the industry's environmental pressure at the source.

The system features fully automated control throughout, requiring no repeated manual pulping or bleaching operations and greatly reducing labor intensity; at equal production capacity, it has a smaller equipment footprint and lower one-time investment; membrane elements operate stably over the long term with zero breakthrough loss of metatitanic acid particles, eliminating raw material loss and continuously reducing overall operating costs for titanium dioxide producers.

Equipment based on the patented technology can be adapted to titanium dioxide production lines of all scales, from 10,000 to 100,000 tons. The benchmark 60,000-ton washing unit commissioned in 2018 has operated continuously and stably for 8 years without any major shutdown failures, fully validating the long-term reliability of the process.

From the launch of R&D in 2011 to today, this membrane washing technology has been refined over 15 years of iteration, with a complete development trajectory attesting to its technical value:

2015 — The technology was listed by the Titanium Dioxide Industry Technology Innovation Strategic Alliance as one of three key promotion technologies for the entire industry, and the core invention patent application was filed in the same year.

2016 — The first industrial-scale unit was deployed at a leading titanium dioxide enterprise in Shandong, achieving commercialization; in the same year, it was recognized as a Shanghai High-Tech Achievement Transformation Project and an Outstanding Enterprise in the 5th China Innovation and Entrepreneurship Competition.

2018 — The industry's landmark 60,000-ton green washing circulation unit was completed, becoming a demonstration benchmark for sulfate-process titanium dioxide washing technology.