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Our company has been awarded the 23rd “China Outstanding Patent Award.”
2022-08-05
Recently, the results of the 23rd China Patent Award were announced, and the invention patent “A Process and Apparatus for Enhancing the Yield of Isopropanol in Acetone Hydrogenation (ZL201310364054.1)” owned by Jiangsu Jiutian High-Tech Co., Ltd. (hereinafter referred to as Jiutian High-Tech) was awarded the China Patent Excellence Award.
The China Patent Award is the highest honor in China’s patent field, co‑sponsored by the National Intellectual Property Administration and the World Intellectual Property Organization. It is the only government‑level award in China that recognizes inventions and creations granted patent rights, with evaluation criteria focusing on the patent’s technological advancement, measures for its application and protection, social benefits, and prospects for future development.
The patented technology recognized in this award pertains to a process that enhances the yield of isopropanol in the hydrogenation of acetone. In the acetone‑to‑isopropanol hydrogenation process, isopropanol, water, and acetone readily form a ternary azeotrope. Conventional methods such as azeotropic distillation and extractive distillation, after removing water, typically dispose of the resulting waste stream as liquid effluent, thereby reducing isopropanol yield and keeping production costs persistently high.
Through continuous technological innovation, Jiutian High-Tech has introduced pervaporation membrane separation technology into the acetone hydrogenation process for isopropanol production. By employing membrane permeation, it achieves dehydration of the isopropanol–acetone–water mixture, enabling acetone to be recycled back to the upstream reactor to participate in the hydrogenation reaction. This approach resolves the ternary azeotropic problem involving isopropanol, water, and acetone, significantly enhancing both acetone conversion and isopropanol yield.
The process flow is shown in the figure:
▲ Complete set of pervaporation membrane equipment
This patented technology has reengineered the acetone hydrogenation process for producing isopropanol, optimizing the production steps. The process is simple and easy to operate, reducing energy consumption and costs, lowering carbon emissions, and increasing isopropanol yield. Moreover, it does not introduce any third‑party components, thereby avoiding environmental pollution. To date, multiple industrial-scale units have been commissioned in Jiangsu, Shandong, and other regions. Compared with conventional methods such as azeotropic distillation and extractive distillation, this technology achieves more efficient water removal from isopropanol, with an acetone conversion rate of up to 99.9% and an isopropanol yield of up to 99.5%.
Jiutian Gaoke, a national high-tech enterprise that was among the first in China to integrate R&D, production, sales, and service of inorganic pervaporation membranes, specializes in the design, delivery, and support of organic solvent separation solutions centered on membrane technology. The company consistently builds on its core patented technologies, continuously advancing research and development, and has progressively achieved the industrialization and large-scale deployment of multiple separation technologies.
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