H12MDA independent preparation technology international advanced

On September 3, the 4, 4'-Anecotesy Disidine (MDA) catalyzed hydrogenation green preparation of 4,4'-subcontaneous preparation of the 4,4'-Asian The methyl bipotransamine (H12MDA) technology has approved the results of the results organized by the Shaanxi Provincial Petroleum and Chemical Industry Federation in Xi'an.

The appraisal committee of Li Pinghong, a professor at the School of Chemical Engineering, Northwestern University, agreed that the technology uses an independent high -efficiency catalyst, and the "three wastes" emissions have decreased. They have the characteristics of green environmental protection and higher safety. Internationally advanced level, it is recommended to accelerate the pace of industrialization.

According to reports, the technology uses MDA as the raw material and adopts newly developed high -efficiency special catalysts. It does not add high -polluting liquid alkali to H12MDA under the gentle conditions, becoming a new low -cost green craft route.

According to Wang Liguo, a researcher at the Institute of the Chinese Academy of Sciences, the problem of harsh response conditions, complicated reaction systems, low product selectivity, and need to add alkaline liquid to dewonding dewlidation and contraction side reactions in tetrahydrology in the traditional process Nitrogen carrier low load 催 催 catalyst preparation technology. This catalyst has the characteristics of high selectivity, high activity, high stability, and easy to enlarge preparation, which can effectively inhibit the by -products in the reaction process.

Relying on the small test technology of the laboratory, the Shaanxi Coal Industry Chemical Technology Development Center Co., Ltd. has built a 100 -ton MDA catalytic hydrogenation green preparation H12MDA trial device in Weinan, Shaanxi to achieve long -term safe and stable operation. Through optimizing the process and adjusting the material ratio, they clarified the best reaction conditions and provided a basis for subsequent industrialized devices.

The device passed the 72 -hour on -site assessment organized by the Shaanxi Petrochemical Federation. The assessment data shows that the MDA conversion rate of the device reaches 100%, and the H12MDA has reached 96.5%.

Song Shuangtian, chairman of Shaanxi Coal Industry Chemical Technology Development Center Co., Ltd., said that with the widespread application of new products such as high -end polyurethane and high -quality curing agents, the demand for aromatic amine and lipidine will continue to grow, and green synthesis technology has become a development trend. In the next step, they will increase the industrialization of H12MDA green preparation technology, and use this technology as the core to continuously expand the upstream and downstream industrial chain of special amine -high -end isocyanate -polyurethane materials, increase product added value, and break foreign technology and product monopoly.

H12MDA is a type of special amine. The downstream products include diopyzyl nignexyl (MDI), high -quality cyclode oxygen, polyamide material, elastic body, fiber, foam plastic, etc. The field of high -tech materials such as optical fiber communication has extensive application prospects. At present, only a few countries such as the United States, Germany and China have H12MDA industrial production technology. They all need to use precious metal catalysts. The production process needs to be added with alkaline liquid, and the reaction temperature and pressure are high.

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