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Energy Conservation and Emission Reduction, Innovative Development | Jiutian High-Tech’s Two Technologies Featured at the China Membrane Industry Development Summit!
2020-09-21
The 2020 China Membrane Industry Development Summit and the (Third) “Matadahu” High-Level Forum on the Membrane Industry, themed “Technological Innovation, Industrial Linkage, Collaborative Integration, and Win-Win Cooperation,” concluded successfully in Huantai County, Shandong Province. In his keynote address, “Strategic Research on How Membrane Technology Promotes Green Development in the Petrochemical Industry,” Vice President Xing Weihong of Nanjing Tech University provided a detailed overview of Jiangsu Jiutian High-Tech Co., Ltd. (hereinafter referred to as…). Jiutian Hi-Tech ) Independently developed “ A New Process for Isopropanol Production Using Pervaporation Membranes ”, and “ Pervaporation membrane application for the purification of tetrahydrofuran (THF) solvent “Two technologies have attracted widespread attention from the attendees.”
▲ Vice Principal Xing Weihong delivered the keynote report.
A New Process for Isopropanol Production Using Pervaporation Membranes
Isopropyl alcohol is an important chemical product and raw material, widely used as a solvent or extractant. Conventional production and recovery processes, such as azeotropic distillation and extractive distillation, are employed for dehydration and separation; however, these methods are operationally complex, energy-intensive, and highly polluting, leading most manufacturers to dispose of the byproduct as waste.
Jiutian High-Tech has independently developed a novel pervaporation membrane process for isopropanol production, employing an inorganic pervaporation molecular sieve membrane. This process dehydrates the acetone–isopropanol–water ternary azeotrope generated during production, reducing its water content from 12 wt% to 0.5 wt%, and then recycles it back to the front end for further reaction. This process can significantly enhance separation efficiency and reduce process energy consumption. It has been successfully implemented at numerous enterprises, including Shenyang Sanjiu Pharmaceutical Co., Ltd., Ruiyang Pharmaceutical Co., Ltd., Qianhui Pharmaceutical (Anhui) Co., Ltd., and Changzhou Yabang Qihui Pharmaceutical & Chemical Co., Ltd., significantly increasing isopropanol yield by more than 5% and enhancing product value, thereby offering a new solution for isopropanol production in the pharmaceutical and chemical industries.
▲Production Process Flow
Purification of tetrahydrofuran solvent using pervaporation membranes
In the petrochemical and pharmaceutical‑chemical industries, during formulation reactions, the water content in tetrahydrofuran (THF) solvents must be extremely low—typically below 500 ppm—and the solvent must be dehydrated and recycled after use. Conventional THF dehydration by pressure‑swing distillation consumes more than 1.5 tons of steam per ton of product, yields a low recovery rate, and can lead to the formation of peroxides in the bottom of the column, posing significant operational safety risks.
In response to the above issues, Jiutian High-Tech has independently developed a pervaporation membrane technology for purifying tetrahydrofuran (THF) solvent, shortening the THF–water separation process, increasing product recovery by 4–5%, and reducing steam consumption to just 0.35 tons per ton of product. Meanwhile, operating under low‑temperature and low‑pressure conditions further enhances system safety. To date, this project has been successfully implemented at dozens of enterprises, including Chongqing Tiandi Pharmaceutical Co., Ltd., Zhejiang Lianhua Technology Co., Ltd., Changzhou Jia’erke Pharmaceutical Group Co., Ltd., and Qilu Antai (Linyi) Pharmaceutical Co., Ltd., yielding significant economic and social benefits.
▲Membrane device
Compared with conventional distillation and adsorption technologies, Jiutian High-Tech’s fully proprietary pervaporation membrane separation technology is more efficient, energy‑saving, cost‑effective, and environmentally friendly. . Driven by continuous technological innovation and breakthroughs, Jiutian High-Tech has earned widespread market recognition and has been successively accredited as National High-Tech Enterprise, National Intellectual Property Advantage Enterprise, China’s Demonstration Enterprise for Technological Innovation in the Petroleum and Chemical Industry, Rising Star in China’s Membrane Industry, and Nanjing City Enterprise Committed to Contract Compliance and Creditworthiness. and so on. The company’s relevant technological achievements have been awarded 2012 First Prize for Technological Invention from the China Petroleum and Chemical Industry Federation, First Prize of the China Membrane Industry Association Science and Technology Award for 2017, and First Prize of the Jiangsu Provincial Science and Technology Award for 2019. and numerous other honors.
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