Recently, Xuke New Materials (Shandong) Co., Ltd., which is the general contractor of China Wuhuan Engineering Co., Ltd., has built 30,000 tons/year PBAT/PBS and 10,000 tons/year succinic acid/butylene glycol. The acid anhydride project was completed and put into operation, and stably produced succinic acid and succinic anhydride products with a purity of over 99.5%. This project is the world’s first 10,000-ton petroleum-based hydrogenation project of maleic anhydride to prepare succinic anhydride. It focuses on the scientific research, production, sales and service of high-performance new materials, and mainly produces degradable materials and related fine chemical products.
With the increasing pressure on environmental protection and the enhancement of public awareness of environmental protection, green and low-carbon development is not only advocated by the country, trended by the industry, called by the public, and expected by society, but has also become a steadfast path for many enterprises. The proposal of the “double carbon” goal has sounded the clarion call for transformation and upgrading of the traditional petroleum and chemical industries, and “reducing oil and increasing fuels” has become an inevitable trend. How the use of fossil energy changes from “fuel” to “material” has attracted much attention. At the same time, in the face of the intensification of white pollution, “plastic restriction” has been the focus of attention in recent years, and the development of degradable materials such as PBAT and PBS is highly anticipated. Therefore, this project explores how to effectively link the “oil head” and “plastic tail” of the new green chemical materials industry.
Promoting the development of plastics industry clusters toward high-end, green, and integrated development has important demonstration significance. The project will help build a carbon four industry chain and achieve coordinated development of upstream and downstream products.
Wuhuan Company is committed to accelerating the establishment of a “comprehensive solution service provider in the field of industrial engineering, a supplier of high-end chemicals and advanced materials”, and spares no effort in researching key core technologies of new materials. Relevant technical achievements have also been fully demonstrated in this project.
The PBS device of this project applies a new technology jointly developed by the process development team of Wuhuan Company, the technical expert team of Xuke Company, and the R&D team of Jiangnan University. R&D personnel have conducted technical research and improvements on the polymerization characteristics of PBS, making it excellent in product quality adjustment and long-term stable operation of the device. At the same time, the device has high production flexibility. The device can use succinic acid as raw material for polymerization, or it can directly use succinic anhydride as raw material for polymerization. The resulting product has a higher degree of polymerization, better color, and ultra-low acid value.
The project’s succinic anhydride and succinic acid plant production also applied self-developed new technologies. For the first time, a double selective hydrogenation reaction of maleic anhydride (maleic anhydride) was realized on a 10,000-ton industrial unit, with a maleic anhydride conversion rate of 100 %, the selectivity of succinic anhydride is 100%, and it has many advantages such as less by-products, high anhydride yield, and low overall energy consumption. The R&D team of Jiangnan University provided catalysts and technical support, and Wuhuan Company completed the technology development and engineering design.
It is worth mentioning that the project is the first in the world to use the succinic anhydride hydrolysis and slicing process to produce succinic acid. This process has low investment, low energy consumption and high product purity, and can fully meet the demand for polymer-grade PBS raw materials. The entire process technology is innovative and advanced, laying a good technical foundation for the subsequent construction of 100,000-ton units.
Currently, the first phase of the project includes two sets of devices. After the second phase of expansion, the annual production capacity of corresponding products will increase to more than 100,000 tons.
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