In recent years, some private enterprises in Xiamen have devoted themselves to the comprehensive utilization of industrial waste, and have embarked on a sustainable development path to vigorously develop a circular economy.
Xiamen Bay Chemical Co., Ltd., with the technical support of Xiamen University, developed a new technology of using PTA (terephthalic acid) residue to produce unsaturated polyester resin, invested in the construction of an unsaturated polyester resin production line, not only for the treatment of PTA waste residue An ideal way also greatly reduces the production cost of unsaturated polyester resins.
PTA residue is the oxidized sludge discharged from the PTA production process, which is difficult and costly to recover. Sent to the solid waste center to deal with each ton of waste slag to pay processing fees from 2000 to 3,000 yuan. Xianglu Petrochemical Company, one of the largest PTA manufacturers in China, is located in Xiamen, and the source of PTA waste residue is guaranteed. Gulf Chemicals has developed this technology. Since the project was put into operation, the output value of the Gulf Company has reached 100 million yuan. At present, they are expanding their production scale and strive to build a production line with an annual output of 100,000 tons by the end of 2005, which will be matched with the waste residue of Xianglu Petrochemical Company.
Last year, Xiamen Yongxing Paper Manufacturing Co., Ltd. purchased the “Fly Ash Superfine Fiber with Special Paper Industrialization†project from Shanghai East China University of Science and Technology. The main raw materials are coal slag and coal ash from chemical fertilizer plants and thermal power plants. Various bags. This project is to add softener and 30% wood pulp to fly ash to perform physical deep processing. The special paper produced by microfibers is fireproof, temperature resistant, antiseptic, durable, tamper-proof and waterproof. The smooth and light-like advantages can be used to produce packaging materials for national defense, electrical communication paper products and chemical products, asphalt, cement and other products. Because this paper is particularly strong, it can replace the current textile bags and plastic bags. After the company’s 50,000 t/y specialty paper production line is under construction, they will also build a papermaking industrial park in the private industrial park in Xiang’an District, Xiamen City, with a total investment of 400 million yuan in the first phase and an annual output of 800,000 tons. On the scale of specialty paper manufacturing enterprises, after the project is completed and put into operation, 1.2 million tons of coal ash and coal ash can be consumed each year, and the output value is worth 8 billion yuan. Fly ash papermaking projects can not only solve the problems of chemical and other coal companies dealing with waste slags, wasteful and polluting the environment, but also save wood and water resources. Not only do they have high added value, but they also have good social benefits and a very promising market.
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