In recent years, green products such as p-phenylenediamine antioxidants and sulfenamide accelerators have become the leading products in China's rubber chemicals industry. However, there are still some products that require the development of cleaner production technologies. At the Ninth National Rubber Industry New Material Technology Forum held on October 19th and the 2009 General Meeting of Rubber Additives Professional Committee, the experts proposed that: Accelerating the development of the cleaner production process for Accelerator M and advancing oxygen oxidation and H2O2 oxidation processes The promotion and application of sulfenamide accelerators.
Xu Chunhua, chairman of the rubber additives special committee of the China Rubber Industry Association, said that clean production is an important measure for the sustainable development of rubber chemicals industry, including raw materials and intermediates, production processes, "three wastes" treatment, product structure and product application. Cleanliness of the process. Among them, the cleaner production process and "three wastes" treatment of accelerator M are the top priorities for the development of the rubber chemicals industry in recent years.
At present, the annual production of accelerator M exceeds 150,000 tons and the output is very large. Most of the domestic accelerants M are produced using aniline, carbon disulfide and sulfur as raw materials, and crude M is obtained by synthesis under high temperature and high pressure, and crude M is refined. The refining methods are acid-base method and solvent method. Most enterprises adopt the acid-alkali method for refining, resulting in a large amount of waste gas, waste water and waste residue. Exhaust gas has been basically controlled by oxidation in Claus furnace; the main way out of waste residue is comprehensive utilization; wastewater treatment is the most difficult. Among them, the finished product of 1 ton of accelerator M produces about 45 tons of organic wastewater, and the wastewater has a high salt content and is difficult to control. "If you can't solve the problem of wastewater treatment of accelerator M, you can't talk about cleaner production in the rubber chemicals industry. Only by developing clean production processes can you fundamentally solve the 'three wastes' problem of accelerator M." Xu Chunhua said.
It is understood that Henan Liyang Weilin Chemical Co., Ltd. has invested more than 30 million yuan in the treatment of waste water from the treatment accelerator M. At present, it has already produced 1 ton M to produce 15 tons of wastewater; Shandong Shanxian Chemical Co., Ltd. has invested 5000 in environmental protection. Million yuan, the production of 1 ton of accelerator M's wastewater has dropped to about 10 tons. Wang Shuhua, general manager of Tianjin Kemai Chemical Co., Ltd., told the reporter that the waste water treatment of accelerator M is a hard bone, and many overseas factories have stopped production due to environmental issues. Currently, Kemai company is working with relevant universities and other joint research projects. “Not to mention 45 tons of waste water, not even 5 tons. The problem of clean production must be solved, otherwise companies will have no way out.†Du Mengcheng, deputy general manager of Shandong Yanggu Huatai Company, told reporters that they used solvent refining to improve M. The production process, from the high-pressure reaction to the extraction, filtration, drying the entire process of closed production, take the product within the road of recycling, the production process does not produce wastewater, product quality can meet downstream needs, has applied for a patent. Its 10,000-ton accelerator M clean production technology development project has been completed and will be completed within 3 years.
Xu Chunhua pointed out that the next step in the industry will be based on the clean process of accelerator M, and the development of high-quality green additives for high-speed safety tires, automobiles, and motor vehicle rubber accessories will be the end point and a technical roadmap plan will be established.
In addition, sulfenamide accelerators such as CZ, NS and the like are prepared by using the accelerator M as a raw material and must undergo an oxidation process. At present, most companies use sodium hypochlorite and other oxidants for the reaction, resulting in a large amount of salty wastewater, and the use of oxygen oxidation and H2O2 oxidation process can be avoided. However, the latter has strict requirements on process equipment, and there are still problems in terms of safety and product yield. In recent years, many companies have tried to oxidize DM, CZ, NS, and other process technologies with oxygen, which has greatly reduced emissions, but this process has not yet been promoted in the industry. Xu Chunhua said that the rubber chemicals industry should also vigorously develop oxygen oxidation or H2O2 oxidation processes, while addressing issues such as safety and product yield.
Xu Chunhua pointed out that if the cleaner production process of accelerator M and oxygen oxidation and H2O2 oxidation process technology can be fundamentally resolved, China's rubber chemicals industry will be able to basically achieve the goal of cleaner production.
Xu Chunhua, chairman of the rubber additives special committee of the China Rubber Industry Association, said that clean production is an important measure for the sustainable development of rubber chemicals industry, including raw materials and intermediates, production processes, "three wastes" treatment, product structure and product application. Cleanliness of the process. Among them, the cleaner production process and "three wastes" treatment of accelerator M are the top priorities for the development of the rubber chemicals industry in recent years.
At present, the annual production of accelerator M exceeds 150,000 tons and the output is very large. Most of the domestic accelerants M are produced using aniline, carbon disulfide and sulfur as raw materials, and crude M is obtained by synthesis under high temperature and high pressure, and crude M is refined. The refining methods are acid-base method and solvent method. Most enterprises adopt the acid-alkali method for refining, resulting in a large amount of waste gas, waste water and waste residue. Exhaust gas has been basically controlled by oxidation in Claus furnace; the main way out of waste residue is comprehensive utilization; wastewater treatment is the most difficult. Among them, the finished product of 1 ton of accelerator M produces about 45 tons of organic wastewater, and the wastewater has a high salt content and is difficult to control. "If you can't solve the problem of wastewater treatment of accelerator M, you can't talk about cleaner production in the rubber chemicals industry. Only by developing clean production processes can you fundamentally solve the 'three wastes' problem of accelerator M." Xu Chunhua said.
It is understood that Henan Liyang Weilin Chemical Co., Ltd. has invested more than 30 million yuan in the treatment of waste water from the treatment accelerator M. At present, it has already produced 1 ton M to produce 15 tons of wastewater; Shandong Shanxian Chemical Co., Ltd. has invested 5000 in environmental protection. Million yuan, the production of 1 ton of accelerator M's wastewater has dropped to about 10 tons. Wang Shuhua, general manager of Tianjin Kemai Chemical Co., Ltd., told the reporter that the waste water treatment of accelerator M is a hard bone, and many overseas factories have stopped production due to environmental issues. Currently, Kemai company is working with relevant universities and other joint research projects. “Not to mention 45 tons of waste water, not even 5 tons. The problem of clean production must be solved, otherwise companies will have no way out.†Du Mengcheng, deputy general manager of Shandong Yanggu Huatai Company, told reporters that they used solvent refining to improve M. The production process, from the high-pressure reaction to the extraction, filtration, drying the entire process of closed production, take the product within the road of recycling, the production process does not produce wastewater, product quality can meet downstream needs, has applied for a patent. Its 10,000-ton accelerator M clean production technology development project has been completed and will be completed within 3 years.
Xu Chunhua pointed out that the next step in the industry will be based on the clean process of accelerator M, and the development of high-quality green additives for high-speed safety tires, automobiles, and motor vehicle rubber accessories will be the end point and a technical roadmap plan will be established.
In addition, sulfenamide accelerators such as CZ, NS and the like are prepared by using the accelerator M as a raw material and must undergo an oxidation process. At present, most companies use sodium hypochlorite and other oxidants for the reaction, resulting in a large amount of salty wastewater, and the use of oxygen oxidation and H2O2 oxidation process can be avoided. However, the latter has strict requirements on process equipment, and there are still problems in terms of safety and product yield. In recent years, many companies have tried to oxidize DM, CZ, NS, and other process technologies with oxygen, which has greatly reduced emissions, but this process has not yet been promoted in the industry. Xu Chunhua said that the rubber chemicals industry should also vigorously develop oxygen oxidation or H2O2 oxidation processes, while addressing issues such as safety and product yield.
Xu Chunhua pointed out that if the cleaner production process of accelerator M and oxygen oxidation and H2O2 oxidation process technology can be fundamentally resolved, China's rubber chemicals industry will be able to basically achieve the goal of cleaner production.
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